Digital PDFs

EK-GA750-RM-001

May 1981

403 pages

Original

31MB

Document:	VAX-11 750 Gate Array Chip Reference Manual 1981
Order Number:	EK-GA750-RM
Revision:	001
Pages:	403
Original Filename:	http://bitsavers.org/pdf/dec/vax/750/EK-GA750-RM-001_VAX-11_750_Gate_Array_Chip_Reference_Manual_1981.pdf

OCR Text

EK-GA750-Rlr-0e I

YAx-l l/75.
GAtE ARRAT CI|IP
REFEREf,CE iAXUAL

(ipvn3ht O lgtl h1 Íhptel tqurpnrnr (-rrrlxwrttrn
All Rlhtr l,errvcJ

Thc mrrcdirl in thir tnrnurl n for tnformrtronrl puqror.t rnd rs
rublcc to càrrlt3 rithout notrcG

Dfitrl Equipurt Corporetron rsumct no rcsponsrbilrrl for en1
cr?oÍ! rhic'h ney rppcrÍ In thr mrnud
ÈrntodrnUSA

Thc Íollorirg rrc tr.&mrrlr oÍ Dfirtl Ëquipn*rrr CorForrrion.

Mrynerd. M rsrdrurctrr:

DIGITAL
DEC
PDP

DÉCUS

UNIruS

DECrpncn-10
DECSYSTEM.T)

DIN)t

EDUSYSÏEM

vAx

vMs

MASSIUS

OMNIIUS

os/r

RSTS

RSX

tAs

cof,TEXtS

C[ÀPTER

DOClllENt SCOPE .

. . . o. . . . . . . . . . . .

CIAPIER 2

GÀTE ARRAT TECNNOLOGT (GEf,ERAL OVERVIEI|) .

. . . .

CBAPIER

GÀTE ARRÀT CHIP DÀTA. .

aoaa

3.1
3.2
3.3

3.{

3.5
3.6
3.7
3.8
3.9

3.lc
3. ll
3. l2
3. 13
3. l,l
3. 15
3. l6
3. l7
3. l8
3. 19

3.20
3.21
3.22
3.23
3.24
3.25
3.26
3.27
3.28
3.29

. . . . . . . . .
Àcccss Control Chtp (ACv) . . . . . . .
Àddress Control Chtp (ADDI. . . . . o .
Àddress Control Chlp (ADKI. . . . . . .
ÀrltbcÈlc and loglc Control Chtp (ALK)
ÀrtÈhlctle toglcal proccegor (ALÈ;. . .
Cache Addrcss Control Chlp (CAK). . . .
Condltton Codc Control (CCC). . . . . .
Carry look Ahead (CIÀr. . . . . . . . .
Cache lleaory Control (CnXl . . . . . . .
Console lnterface Chtp (COtl]. . . . . .
fnr:errupÈ Control Chlp (Il|Tr. . o . . .
Instruetlon Rcgtstar Dccodc (tRD) . . .
ËASSRUS CtlI fnterfacc Control, ([CI] . .
ilASSE US Data Prth Control (nIEt . . . .
nASSir:JS DaÈa Path (fDp) . . . . . . . .
ilelor.. Deta RcgtatGr (nDR). . . . . . .
ilASSBUT Reglater Control (nRC). . . . .
]|^SSBUE $tlo Control (lSCl . . . . . . .
itcro Scqucnecr (tlSQ) . . . . . o . . .
Proecgeor Status Branches o . . . . .
Prcfctch Controller Chtp (pRN). . . . .
Servlce and ÀrblÈratlon Control (SAC) .
ScraÈch Pad Addrces Chlp (SpA). . . . .
Shifter Control Chtp (SRf). . . . . . .
Shtft and RotatÍng iultlplerer (SRttl . .
Ther (TOKI . . o . . . . . . . . . . .
UNIBTS Control (UCNI. . . . . a . . . .
UNIBUS Data Path (UDP). . . . . . . . .
lllcro-Trap Chtp (UTR) . . . . . . . . .

lll

l5
oa
aa

23
4e
59

le8
aa

aa
aa

aa
aa
aa

ll6

t30

l{r

163
173
186
197
2L2
223
235
247
256
267
2E5

299

3ll

328

3tr

aa
aa

3{8
363
378

l.
DOCI;STT 6COP8
Tttc Gete Array chÍp Rcfcrencc ls colpany confldcntlal.
tt ls
tytllable only on flchc.
The lntcn! of thls docracnt ls to
Provlde a dctctled lnforaatlon.source for gatc rrrry chips uscd in
thc VAX-Il/73C Ccntral Proccggor, UNIEUS Intcrfacc, and ËASSBUS
Maptor. Tfic lnforaatton contalncd ln thlg lanual should bc rcad
ln rcfcrcnce to thc Fleld Servlce lL/75C Gatc Array Prlnt Sct
(iP-XXX) 8cc Note.
lbtc: XXX . Nunbcr to be euppllcd rt r latcr date.
lrbtc l-l Rctatrd ltnuett
?l rl.

Docrnnt lurbar

Tcchnlcal Descrtptlons :

m75, Unlbus Intcrface (UBI)
lls?50 llcrory Systca
PS75a Porcr Systca
Rn?5e faggbus Adaptcr (ilBA)

FP75, Floatlng-Polnt AccelGrrtor (FPÀ)

ET-D75E -TD

Er {s 75C -tD
Er-PS75t-tD

ET-RH75C-?D

EI(-FP75'-TD

DlagnoetÍc SyeÈea:
VAX-Il Dlagnostlc Syeten Uscrrs Gulde
VAX-IL/759 Dlagnostlc Systen Orrervleu

Eh-vxl lD-uc
EX-VXD75-UG

Uscr Docrncnt.Ètons
StÈc Prcparctlon Date Sheets
Incta I I a t lonlAccGptrncc

YAX-!l Archlt.cturG Handbook
VAX-It Softyerc ltandbook
YAI-Il Herdrorc Handbooh
Ftcld Scrvlcc LL/75O Gate Array prlnt Set
llard-copy docuncnta cen bc ordered froa:

EX<ORP-SP
EX-St 75r-tN

E8-l 758t-l I

EB-l 5at5-lt
E8-t 72At-2a

ftP-xrx

Dlgltal EquÍFGnt CorporatÍon
la{ fhltncy Strcct
l{orthboro, tlA e1532
Àttn: Prlntlng and Clrculatton Servtces (NR2r/ltf5)
For infor.rtlon concernlng nÍcroflche lrbrarles, contects
Dlg lÈel Equtprcnt Corporatlon
ilcropubltahlng Group
26 Croeby Dr Ívc
Brdford, IA Cl73O

2.
GA?t AnnAI ?rctlOtffl (Gencrel Orcrvlrrl
(9tl) of thc vÀx-l t/7sa harduarc logtc destgn ts
raJo-rl-ty
!!e
.
lrptcrcntcd
tn cuctol largc scalc lntcgrated (Lsr) circults óalled
gotc. !.rr!_y!. _ fircrc gttg trratrs rrc dcclgned and nanuf actured
for tha VAX-ll/73a. Gatc array technology utlltzes à
lPccfttcelly
f lrcd . phycFf r^ p-laccrcnt of agg xÀND gaÈGs ( thcgc a.tcs rre
caprlrcd of btpolar clrcult tcchnology), - Each grtG arráy chtp ls
cont_l-9_u_rcd durlng the ranufteturlng proccss to produce one of the
39 dlffcrcnt grtc arrry typc! ucód- ln thc vAi-l L/7so. These
chlps .re uscd ln thc VAX-Il/750 CPU, Floatlng Potnt acceleraÈor,
lorory ConÈroller anO liarc Bus adaptor.
gltc array tcchnology has prodrrccd a postÈlve hpact on Èhe
9lltg
VÀX-fl,/?SC deslgn ln a nurber ïayls
o
rncreased epced p€r logle gatc (5 Èo re nanosccondsl
' o
loucred pouGr consrrptlon
o Feuer P.C. boards due to LSI
o
Increased rellablltty
o torered cost
For deÈalls on the precedlng polnts aee Table 2-1.

Table 2-l lcchnology spcclflcetlonc for thc yAr-tl/7sa

IlplelentaÈlon Technlque - Gate Arrays
Clreult Technology lou Forer Elpolar Schotrky
Clrcult Denstty - Lrrge Scale lntegratlon (LSt)
Dle Slze .215 lnches x .21a tnchcs
Forer Utlllzcd per Dle 2 veÈts iar
Package Elze - l.l{ eq. ln. (2.t1 lnches x e.6 lnches)
llurber of Plns,/Pactage - 18
llo Clrcults/dlG ll Í/O tcanscelvcr gaÈes
logtc GaÈee - ICC Ídcntlcal I lnput I{AND gates
Voltage Uced - +2.5 volÈs, + 5 volts
Speed pcr gate - l-10 nanogcconds
Unlque Gate Array tYpcs:
CPII and ieaory ConÈroller 27

?loatlng Folnt Accelcrator 7
Ieas &rs Adaptor - t
lbÈal Xurbcr of Gate Arrays Used:
DPtf and teaory Controller - 55
FloatÍng Folnt Accelcrator 28
lage 8us AdapÈor - 12

GATE ARRAT CHTP DATA

3.1

ACCESS COXInOL CËIP (ÀCY-8625'

GENERAL DESCRIPTION:

Ttrc ACV ls a control chtp rhlch dctGctr and prlorltlzcs
scvcral klnds of nlcro-traps and cncodcr the tdcntlty of thc
hlghest prtorlty rÍcro-trtp on Èhrcc ptnr for ur. by lIfR. lt
aleo provldes tuo bltr of rlcro-vcctor lnÍorratton on PtE
checks and ACCESS PROBES.

ÀCV Tablc I

Pln ldentiflcaÈion and Gate Typc

PIN I

C(NNEXTS

BI'SIH

2 rcLr

GATE

TTPE

GÀITXF
GÀI?XF

ETIÀBLE H

3 ïBUS 2{ H
| Àco H

5
6
7
8
9
IO
II
II
15
l6

l7
l8
19

20
2L
22
23

AC3H
ÀclH
AC 2H

UTRAP L

ÀCVH
IÀTCHED BUS

GAITXF
GAITXF
GAITXF
GAITIIF
GAITXF
GAI?XF
GAITNF
GAITXP

PIX I

CqTEXTS

TÁTCHED BUS
FP RES OP L

GÀIT]IP
GAITXF
GA ITXF
GAITXF

IATCHED TCTRL

GA ITTiF

rÀ02H

GA ITNF

T.ÀTCHED HCTRL

GÀITNF
GAITNF

iAOIH

GA ITNF

IAT\CHED TCTRL

GAITNF
GAITNF
GAITNF

26
27
28
29
30

DSIZEIH
TATCHED WCTRL
lll
2H

D CLT ENÀBLE H

IÀTCHED BUS

GÀITNF

TB VALID H

GAITXF
GAITTN

IH
iAEEH

TATCNED TCTRL

GAITIZN

I.ÀïICHED 8US

GAITZX

GAITTN

lc
tt

PTE CHECK
OR PROBE H

l|tcRo
vEclloR e n

rrcRo

VECTOR I H
ENC UTRAP

IL
E]IC T'TRAP
EL

UB ÀDDRESS H
ETC UTRAP2 L
PREFETCE L

CS PARITY

GAITTX
GAIT]IH
GAITTX
GAIT]{F

GAITI;f

t5
t6
t7
a8

ERROR H

TTPE

32
33

Ptil

IH
IAI\CHED TCTRI
0ll
FORCE TA E9 H
PHASE I H
rEus 26 ar
r8us 27 n
rBus 25 H
PAGE BXDRY H
PR()c IXIT H
BCLTL
DSIZECH

GAt?NF
GATTIIF

GAIT}IN
GAITNF
GAITNF
GAITXF
GÀI?IIF
GAITXF
GAITTN
GAITr|F
GAITIIF

PSR'ORiAXCE RtoUIntrBrTS

ACY Trblc 2

I/O Plns

IIIPUTS

IPINS

AC (3:0) H

BCLKL

Btts I H

CS PARITT ERROR H
D CLT ENABLE H

D SIZE (l:t)
FP RES OP L

lÀtteËED BUS (3:e ) H
IATCIED íCTRL (5:e) H
T CLT EXÀALE H
tÀD <r2: CC) H
PÀGE BXInT N

P[|ÀSE I H
PREFEICH L

TB IIALID H
UB ADDRESS H
UTRAP L

mUS (27:21) H

oTJTPUTS (TOTEi POLE UXLESS OTBERïISE NOTED)
ACV B
ENC UTRAP (2ze) L
FORCE IiA C9 H
IIICRO VECTOR (l:0) H

PR(rc INTT H
PAE CHECK OR PRGE II

I
I

I
{

I
I
I

I
lPllls
-3
I

2 (TRr-STATE)

I
I

Tte follorlng ls a llst of the code asslgnaents for the
flcld:

2.1

BtlS FTNCTIOX lllcro

C.
I.
2.
3.
I.
5.
6.
7.
8.
9.
A.
B.

READ PHïSICÀL ÀDDRESS
PROCESSOR TXITIALIZE

READ, rO irCRO-?RAP

r/o txrrrAtrzE

READ LOCK TINEOUT TEST
NOP

READ, SECOXD REFERETCE
(RESERVED'

TRITE PBTSICAL ADDRESS
REI CNDCT
TRITE, SECOXD REFEREIICË
ïRITE UXL(Etr, SeCOXD REFEREXCE
rRrTE, xo rrcRo-TR^P

D. (RESERYDDT
E. rRrTE IOrGrmD, f,O iICRO-TRAP
F. 8US GRAIT
IE. READ
1I. READ LOXGTORD
12. PtE ACCESS CtrECr, rRrTE
13. READ LCCK

I{. READ IIITH ilODIFY INTENT
I5. READ LOilGïORD HITH Í{ODIFY INTEilT
16. PTE ACCESS CHECK, READ
I7. PTE ACCESS CHECK, READ, KERNEL IIODE
I8. WRITE
I9. TRI?E LONGïORD
IA. T{RITE IF XOT RIIODE
IB. TíRITE UNLOCK
lc. pRoSE AccEss, HRTTE, t{oDE SPECIFTED
lD. PROBE ACCESS, HRrTE
lE. PROSE ACCESS, REÀD, !|ODE SPECIFTED
lF. PROEE ACCESS, READ
Bus Functlons are decoded fron 'IATCHED 8US 4 H'(FLIP-FLOP) and
'IÁTCHED 8US (3:0> H'
tïre follorlng is a partial I ist of codc asslgnncnts for
2.2
the HCTRL lllc ro f Í eld :
ee

psl

2C. VA
PC

21. vÀ <- vA sÀvE + (wBus)

22. VA <- VA + tl
23. l,lDR
24. PC
25. VA
26. ËBtS <- rDR
27. t{DR <- O
28. TB DÀTA
29. T8 VALID 8IT
VA
2A. HDR
29 . NDR
2C. FC
2D. CÀCIIE VALID BIT (- O
VA

28. rm

2P. itDR <- OSR, ZERO EXTENDED
30. STATUS/CONTROL REGISTER <- ïBUS(27t24>
31. PREVTOUS iODE RtcISTER (- rBUS<23222>
32. IíBUS<27224) <- S?ATUS./CONTROL REGTSTER
33. 8US GRATT
3{. STATUE/CONTROL ADDRESS REGISTER <- ttBUS(27221>
35. IS,/CURREI|T iODE REGISTER <- HBUS<26224)
37. REt CËECK
38. ASTLW REGISTER <- ïBUS<26221>
39. (RESERVED'
34. HBUS<26221> <- ASTLYL REGISTER
38. (RESEnVED,
3C. HIGHEST SOF1ïARE tPR REGISTER <- IíBUS<2C: l6)
3D. IPL RtcIStER <- IEUS<29: 16>
38. NOP
3F. tfBtls<20: l6>
ÍTCTRL Functlont .r. d.cod.d Íror .I.rITCHED ïC?RL (5:t> lt.

2.3 Fllp-Flop DeflnÍÈlone:
?IIP-FLOFS CI'OCÍED OI' THE FALLING EDGE OF 'B CI.K L':

I'PNG ITIT H' - JK FLTP-FLOP
J IXPIJT:
'PEASE I H' e (Spcctficd Bus Function is PROCESSOR INITIÀLlzE)
r INPUT:
'PHÀSE I H' t (Spectf ted Bus Fun,-tlon ls NOt PROCESSOR
IXIl'TALIZE )

I'BOUI{DARI H' - D FLIP-FLOP

D IIIPUT:

'PAGE BNDRT H

FLIP-FIOPS CLOCTED ON THE RISIXG EDGE OF '8 CLK L':

I'IÀTCBED BUS 1 H' - JK FLIP-FLOP
J INPUT:
.BIF { H' T 'It CLX ENABLE HT

K INPUT:
rBus { L' t 'lt clt( ENAELE H'

I'iIIE ADD HT - ENABLED D FLIP-FLOP CLCK ENAELE:
.D CLK ENABLE H. T
ISTATUS./COI|TROL ADDRESS REGTSTER
Dccodcl

D TNPUT:
IIBUS 27 L' e rlíBlrs 26 L' & 'IÍBUS 25 Lr t 'WBUS 24 L'

Thc flop ls E CLEÀRED rhen 'PROC INIT Hr is TRUE.

;.|tr;E H' - ENABLED D FLIP-FLOP CLOCI( ENÀBLE:
.D CLtr ETASLE H' t 'IIE ADD H' T
ÍSIA?US,/COilTROL REGISTER <- iÍBUS <27224> (lfCTRL Decode)

D INPUT:
.ÍtBlrs ztl Jl'

Ttre flop ls tE CLEARED rhen 'PROC INIT H' ls TRUE.

2.1 Current lrode Register: Tlrc CtRREm iODE REGISTER is . 2 blt
edge triggered register rhlch ls eloclcd on thc RISIXG cdgc of'B
CLK LI if:
.D CLK ENABLE H' t
IISICffiRENT IIODE REGIS?ER <- HBtS <26z2tl> (TCTRL Decodc)
PSL

2. 5 Hicro-Trap Cond Í Èlons:
CONTROL STORE PARITï ERROR l{lcrofTrap cxlsÈs lf :

]

.CS PARITY ERROR H'

FPA RESERVED OPERAIiID llicro-Trap crlsts

if :

.FP RES OP H'
UNÀLIGNED DATÀ ltllcro-Trap exists

is one of the follouing:

tf the specif ied Bus Function

T{RITE

IIRITE T'NLOCK
},RITE IF NOT ruIODE

REÀD WITH TIODIFY INTENT

READ

REÀD LOCK
PROBE ÀCCESS, READ
PROEE ÀCCESS, READ, !{ODE SPECtFtED
PROBE ACCESS, líRrTE
PROBE ACCESS, tdRITE, ilODE SpECIFTED
PTE ACCESS CHECT, READ
PTE ACCESS CHECK, tfRtTE
ACCESS CHECK, REÀD, TERNEt !|ODE
P?E
.

AND the conblnatlon of 'D SIZE (l:e> H'and'llÀD <elz0e> H'ls
narked'UNAL' ln the follorlng Table:

tAD<Cl s eO>

el
It
It
+--------+-- ------+--------+--------+
I

I
I

t---- ----+--------+--------+--------+
I

UNAL

I
I

+--------+--------+--------+--------+

D-S IZ 8(l : C)

UNAL

ulAL I

UNÀL

+--------+--------+--------+--------+
I

UNÀt

UNAL I

UXÀL

+--------+--------+--------+--------+
tttrALrGxED DA?À, wRt?E UfLocr rlcro-Trap cxlsrs lf UNALTGNED
DÀTA itcro-Trlp erlsts At{D thê specif ted Bus Functton ls I{RITE
t

rrLctr.

UIIALTGNED uN*r8lls DATA ltlcro-Trap exÍsts lf the spectf Íed Bus
Functlon ls not BUS GRAI{T and rUB ADDRESS H. ls TRUE and

'CROSS PAGE H' ls FÀtSE tnds

H' ls
or ttrc sPeclf tcd Bus Functton ts netther
a
PTE ACCESS CHECK, and the conblnatlon of
ip StzE (l:g) H' and 'l|AD
(í,LzOl> H' ls aarked 'uNAL. ln the
follorlng ?ablc:

TPREPEITCU
IRUE
an ACCESS PROBE nor

rÀD<CI : Oe)

*--------+--------+--------

cel

+--------+

I
I

+--------+--------+--------+--------+
ff
el
I uurr I
ll
D-SIZE(l: e) +--------+--------+--------+--------+
UilAL

UNAL

+--- -----+--------+--------+--------+

UIIAL

uxÀL

UNÀL

+--------+--------+--------+-----

UIIAL

---+

I{RITE CROSSI}|G PAGE BOUIIDARï lllcro-?rap exlsts tf .CROSS PÀGE
H' ls TRUE rnd the spcclfted Bus Functton is one of the

follouing:

rR TTE
T{RITE IF NOT RI,IODE
READ
PROBE
^CCESS,
PROEE ACCESS, REÀD, IIODE SPEC IF IED
PROBE ACCESS, r{RITE
PROBE ACCESS, HRTTE, IIODE SPEC IF IED

.CROSS PAGE H. is TNUE If

the follouing:

the speclflcd BUS FUNCTION ls one of

TR ITE

TdRITE I'NLOCI(
ïRITE IF NO? RT.IODE
PROBE ACCESS, READ
PROEE ACCESS, REÀD, !{ODE SPECIFIED
PROBE ACCESS, tdRrTE
PROEE ACCESS, TRITE, I|ODE SPECIFIED

and rnilE H' ls TRUE and 'BOUNDARY H' ls 1RUE and IPREFETCH H'
OP H' is FALSE and the conbÍnatton of 'D
is FALSE and 'FP RES rilAD
(l:0)
<O2zOO) H'ls aarked 'EOP' ln thc
H'
and
SIZE
fol lowirrg Table :
lrAD<02 z ge )

sLo 0ll
log I0l
ees osl
Il0
Ill
+------+- -----+------+------+------+------+------+------+
o0 |
|
|
|
|
|
|
|
|
+------+------+------+------+------+------+------f------t

DsrzE erl
|
|
|
|
|
|
lEoP I
(l : 0 >
+------+------+------+------+------+------+------+------+
lol
I
|
|
|
lEoP lEoP lEoP I
+------+------+------+------+------+------+------+------+
III
IEOP,I EOP IEOP IEOP IEOP IEOP iEOP I
+------+------+------+------+-- ----+------+------t------i
t{RITE UNLOCK CROSSING PAGE BOT NDÀRY rilcro-?rap Grlsrs t f
'CROSS PÀGE H' ls IRUE and the speclfled 8us Functlon ls one
of Èhe followÍng:
WRITE t rf LocK.
PROBE ACCESS, READ
PROBE ACCESS, READ, IIODE SPECTFIED
PROBE ACCESS, WRITE
PROBE ACCESS, t{RITE, ÍiODE SPECIPIED

CHIP OUTPUTS

acceas protectlon code rs dcftned per ÀCV Tablc 3.

rf 'PREFETCH H' ts TRUE, thc lntendcd acccas ls REÀD, and the
tilODE (Cil) blts arcs 'CUR I|ODE (l:0> Hr.
l9

TPREFEITCH H.

ls FÀLSE, and the spectftcd Bus Function is
no rccess chccÈ ls ladc, and rAcv H. is

onc of thc follorlng,
PAT'SE:

R8AD, xO IICRO-TRAP

IRITE, NO TICRO-TRÀP

tfRI'I'E L()XGrORD, NO IiICRO-TRÀP
BUS GRÀXT

IO INITIALIZE

Of Èhc rclalnlng Bue Functlons, the folloulng are checked for RaÀD
tccc38 3
READ

REÀD, SECOilD REFERENCE
READ LOXGT'ORD
READ PHïSICAL ADDRESS
PROBE ACCESS, READ
PR(DE ACCESS, REÀD, riODE SPECTFIED
PTE ÀCCESS CltDCK, REÀD
paE ÀccERss cBEcK, REÀD, KERNEL iODE
PROCESSOR INITIALIZE

All othcr Bus Functlons are checked for rRtrE aecess.
rf TPREFEITCH B' ls FALSE and the spcctftod Bus FuncÈlon ls:
PTE ÀCCÊSS CHECK, READ, KERIrEL trODE

the iODE (Cll blts are forced ro RERI|EL ilODE (Cel.
rf TPREFE1TCH ll' ls FÀLSE and the spcctf ted Bus Functlon ls:
or

ACCESS PROBE, REÀD, ÍIODE SPECIPIED

ÀccEss PR(DE, rRrTE, NODE SPECIFIED

the noDE (cÍtt blÈs .rc3 .lBus (23224) Hr.
Ot,hcrrlse, Èhe IODE (cll) blts are s .CttR I|ODE (l: e ) H. .
lfrc follorlng iICRo-TRAP condltlons are detected and prlorlÈt zedz
(Ë[GHEST' I. COT{TROL STORE PÀRITÏ ERROR
2. FPA RESERVED OPERAXD
3. UXALTGIfED T'XIBUs DÀTA
4. WRITE CROSSTXG PATE 8OUr|DARY
5. ïRITE UXTCX CROSSIUG PAGE BOUNDARY
6. U|ALIGXED mTA, WRITE UI|LOCK
?. UXALIGXED DÀTA

If one or nore of these }|ICRo-TRAPS exlsts, 'EtlC UTRAP (Zze> L'
reflect the tdentlty of the highest priorÍty ||ICRO-TRÀP as shorn in
the folloulng table:
+--------+-----------+
| ËICRO- IIENC UTRÀP
fTRAPll2L'lrL'lgL'l
+------ --+------+-------+---- --+
trltlrltl
+------ --+-- ----+- -----+---- --+
l2lr.lr.lxl
f -:------+-- ----+------+------+
lxlnl
l3fr.
+--------+------+------+---- --+
lclnftlxl
+--------+------+- -----+------+
l5lnlrful
+------ --+------+------+------+
l6lr"lnlrl
+--------+------+------+------+
lTfnlxlLl
+--------+------+------ +---- --+
If none of these II|ICRO-TRAPS ex ists, ' ENC UTRAP (2: l> L' are HIGH.
'ENC UTRÀP O L'is also HIGH unless 'UTR P L' Ís ]IIGH and:
Itre speclf led Bus FunctÍon is a PTE ACCESS CHECK
TCROSS PÀGE H'ls TRUE and the speclfted Bus Function ls an
I

ACCESS PRO8E.

.PHASE I

L' I 'INVAL [.ÀTCH H'
'INVAL IÀTCH H' ls the HIGH TRUE output of a lateh yhlch ls cnabled
shlle TPHASE I Hr ts TRUE.
Latch lnput ls: t29 (WCTRL Decode)l
speclfled Bus Functlon ts a PTE ÀCCESS CHECX or an ACCESS PROBE.
tÍhen enablcd, 'tiICRO VECTOR I H' lc TRUE (HlcH) lf :
(ÀccEss PRoBE) s (.TB VALID Hr + .nllE L.) +
.TB VALID H. r Í.ÀCV H. (Chlp Ourput) ts FALSEI
l{hen enabled, '}IICRO ITECTOR e H' ls 1RUE (HIGH) tf :
(ÀCCESS PROBE) g "|lflE L' +
Í.ACV Hr lchtp OuLPur] ls FALSEI r
Í.TB VALID H. + (PTE ACCESS CHECKI I

aat.

thc speclfled Bus Functlon ls an ÀCCESS PROBE or e PTE ÀCCESS CHEC|(.

coDE

DECIiÀL EINARï
o

2
3

5
6
7
8

aoag

ttel

atl c
acl I

alce

alel
tt l,
clll

laaa

Itol
lall

It
ll

l3l I

llcl
lllc
llll

l2
r3
ll

I133

nilEroulc

^..,11

,::ï:.'*,^
u

no ACCESS
RESERI'ED

t{A

Ur|PREDICTAELE

xrm

KRR
tn
Éï
ER!T
ERR

stf
SRfl
SRn|
SRR

uRsn
uREn
URH
URR

R
R

M
m
nr
M

R
R

m
R
R

ALL ACCESS

ï
R
R

R
R

r - [crncl
E - Erecutlve
s - SupcrvÍsor
u - Uecr

no aeceaS
read only
read urltc

tlrc acccaa le alloucd lf:
{coDE xÉïu cl AxD
[ [coDE EQLUII or

ftf

coffrEr|T

lcr IsSu l{ll} oR IREAD AxD Íclt LEQI, Rrl ] I

Cr le currcnÈ rodc
Rlt le left 2 btts of code
mls onc's corplelcnt of rlght 2 blts of codc
D

<--- DSIZE OH
47t<--- BCLKL
t6 t ---> PROC III IT H
{5 t <--- PAGE BNDRY H
tf t <--- r{Bus 25 H
t3 t <--- wBus 27 H
{2 t <--- HBUS 26 H

BUS{H ---> t el
II CLT E[À8LE H ---> n2
r8us 24 H ---> t 03
Àc e H ---> te 'l

ttB t

AC 3H --->t05
ÀCIH ---> te6
AC 2H

UTRAP L
ACV H
TTTCHED 8US E H
IÀTCHED BUS 3 H

--->w

{l t<--- Pf,ASE T H
{er---> FORCE TIA E9 H

---> t08

---> tc9

--->tlc
--->lll

aaaaaaaaa
aa

39 I
38
37
35
35 r

<--- LATEBED ÍíCTRL O H
GROIJND
Í.ATCHED BUS I H

----ll2 . LID .
ÍATTHED TCTRL 3H
lrcc ----tl3 . DCIIN .
T8 VALID H --->ll{
---- GROUID
3l t <--- ]iA ,O H
PIE EHECX OR PROEE H <---tl5
33 t <--- LATCIIED TCTRL IH
r{lcRo ttEcToR e H <--- t l6
32 t <--- NA9IH
I{ ICRO VECTOR I H <---tl7
3l t<--- LÀTCHED TC1RL 5H
ENC UTRAP I L <---tl8
30 t <--- D CLT ENAELE H
EIrc UTRÀP E L <---tl9
29t<--- rÀc2H
TI8 ADDRESS H ---> lzC
28 I <--- ÍtllcHED rcTRL 2 n
EIIC UTRAP 2 L <--- t 2l
27 t<--- LATCHED T{CTRL { H
PREFITCH L ---> 122
26 t <--- DSIZE I H
CS PARTTI ERROR H --->t23
25 t <--- PP RES OP L
I^TCHED BUS 2 II --->t2{
T'GA

aaaaaaaaa

FIGURE

PI}I COIIFIGURATION DIAGRAIT AND PIN IDENTIFICATION

3.2

ÀDD ÀDDRESS CEIP (1619,

GUTNAT DSSCNIPIIOI:

ttre ÀDDREsmsllcc
deslgncd to accoaplÍsh add ress
rantpul.tlon on ona bytc of thc rarory addrcss. Data ls lnput to
tha tddrese chlps froa the fB and drlvcn frol the address chlps on
Èhc lÀD.

ADD ?rblo I

Pln ldrntlflcrtlon rnd G.t. ïYpr
I

fl
I GATg TYPE I

IPIN I I PIN ID

rll

PAGE BIIDRï H
ESRC SEL SC H

1í8 06 H

6
7

8
9

l5
t6
l7

l8
t9
20

22
23
2a
23
26
27
2e

la
3l

at
a2

i{B e5 H
xB c7 Jl

ASRC SEL SO H
CARRï GEN I H
CARRT GEN 2 H
BSRC SEL SI H
CARRï PROP H

GAITITG
GAITTT{
GA

lTtl{

lrnr

GA ITNG

GAITf,G
CEITNG
GAITNG
GAITIIG
GAITXG
GAI?dG
GAI?TG

I
I
I
I
I
I
I GAItrG
I GAITTG
I GAITHI
I GATTIG
I GÀlrrÍ;
I GAITXC
I GAIrlG
I GAITTG
I celrrc
trrc
II cÀGATTTG
I GAITIG
I GAIIïG

ra02H

ÀsRc sEL sl tl

mrlH

CARRT IN L

rsEo vA oc H

ADD CHTP ID H

xEFCaCH
FORCE iA OI H
llAD 0l H
H
IIAD
11{ L
IXC CARRT
'2
xEFC0lH
i^D 3t tl
x8 PC ezB
IAD f3 ll
L
taltclt
gIÀ FC'|^EACKTIP L
B CLI( L

rA SELECT SO II
C(IIP TODE H
}IA SETECT SI H

GAITIC

EIA FC L
EIA YA L

I
I

rAD

GÀITT{G

CTITTG

GÀ

rB03H

tl
IXC CARRÏ
'7 OUT L
rAD
tl

GAI?NG
GAITXG

GAITTG

ASRC SEL 52 H
HBOOH

,|AD"I

GA ITPN

GAITl{G

HB,|H

I
I
I
I
I
I
I
I

GAITTG
GATTTG

GAIIIG
GATTIIG

I GAIArc
GAIT1IC

I GAlril
I GAITTG
I GAlrrG

tAD '5
f6 rl

2. trrlonre lootrratr:
thr tD388 CtrIP contelnr Íour rrglrtorr:
t. Yr (YtrturL rDm388 RtctstEnt
2. t (trmAr cotrtlR,
t. Yr 8AYl
l. 3c trcnrP
Vl .rÉ YA EfYl .rc lorded dtrectly fror th. outlrur of the
rddrr. DC .tÉ FC tfCfUP rr. lordcd frot the outpuL of tlre YA
SlYl r.it.È.r.
Slnce tho Yl SAYI roglttcr lr ! tr.nrprÍent
lrtch, DC .tÉ FC DICIUP r.y rlso br -loodcd utth tnfoórtlon
tror Èho ródrr outgrG by rnrbllng thc YA SAYE rcglrter Érllc
Cho grC or AC tfCruP l. be fq cntbled.
Sourcrl tor th. A lnput to the rddcr rrc3

l.a
2. +l
t. +2
l. +a
3.m
Sourcrl lor Èhc E lnput to thc eddcr rr.s

t.a

2. Vr

3. YA SAVB
l. lc
2.1 tfre iA lr r trrnsparCnÈ latch. Ilrl lo rneblrd, I t p.tro3
lnlorrrtlon fror thc tA ruitlplrrrr dlrrctly to thc iAD. lfhrn
thr onable goee falrr Èhc lA rctrlnr thc lnfonrtlon thtt lr
pros.nt orr Èho lnputr .t thet ttre untll thc oncblo brcorcr
Èrua lglln.
Sourcet tor the IA trc3
l. vA
2. FC
3. FC BACTUP
I. FC IIICREIEXTER
?hc FC IXCRETEXTER contlnuously provldec PC+l for
prc-fctchlng.

2.2 CtrlP I./O StmAnï (Scc 'FUIICtIOXS' tor Pln Functloncl: Sce ÀDD
Plguro t for Pln ldenttfÍcatlon.
F(IER/GROUTD
I plnr

rAD
BCTI

POnCE rA tt
ÀD CXIP ID
PAGE BXMT

rsDQ Yrrf

E FC<r2:ff)

EIA YA L

8IA YA SÀVE
EIA FC

TIA PC DACTUP
talcl tA

ASrc StL

BSRC Str
rA SEÍ.DCT
CARNT II

CINRT GET
CARRT PROP
Irc CÀRRT IX
txc cÀRRr ouT

c(nP ioDE
2.

E plnr

t plns
I pln
I ptn
I ptn
I pln
I ptn
t ptns
I pln
I ptn
I ptn
I pÍn
I pln
t plns

2 plnr
2 plns
I pln
2 ptns
I ptn
I pln
t pln

I ptn

t ?cetrc6
I

IB: l|tc 18 ray bc courccd onÈo the A ItlPUt of Èhc adder.
iÀD: tfrc tlÀD lg drlvcn fror the tA letch. It thc letch lg
enrblod, thc tÀD contr ln. lnforraÈlon cclcctrd by thc lÀ
tUtTlPIeXER. If the tA lateh tr not rneblod, thc IAD eontrlns
thc tnfonatlon thrÈ uaa pr.rGnt on the latch tnpute rt thc
tllr thc enablc ,ent flllc.
BCLÍ: For atrulatlon purpot.rr thc Vl, FC end Fe BÀeIUp r.y
bc conrtdcrod aa cdgr trlggercd rcglcÈerr uhlch chrngc stató
on thc lor to htgh trensltlon of 8CLtr. YÀ SAYE ls .
tranaprr.nt latch rhlch lr loeded durlng BcLi lor tlrc lf ExÀ
YA L ls truc. Hrlle the latch lg bclng loedcdr thc outputs
follor Èhc lnputs.
FoRcE ttA tl :
lítrcn hrgh, oycrr ldes no rral tA f uncttonr end
forccc blt 0l of thc iÀD to c l.
ADD cHtP lD:
tïrc rxcRErExrER, PÀcE BNDRï crd corstArri
functtong ruet bc pcrforred dtfferently dapendlng on uhcthcr e
ptrtlcultr ÀDDRESS CBIP lc conncctGd aa thc lcait atgntflcant
bytc or onc of Èhc thrcc tott rlgnltlcant bytce ln thó cddrcss
uord. lhen connoctcd ar thc lrarÈ slgntflcant byt.:

lte rrcRqExrtR rdds a onc to trlê Fc tn b!È posttlon c2
rDd lxc CARRI our ts true tf bltr Fc<c7zc2) are all ones.
2. PAGE BIDRï Ír true tf blts VA<0?:C3) .rG all ones.
3. ttr COXS?AilTS (+lr+2r+l) rre cnablcd uhen selccted on the

A IXPUT I.IULTIPLEXER.
lhcn conncctoo as one of the three toat slgnlflcant bytes:
l. ttr rllcRErExrER adds a one Èo the Pc ln blt posttÍon eo
only uhon INC CARRI IN ls truG. fNC CARRI OUT ls true
ufrcn btts PC<C?zOC) arc all oneg and INe CARRï Iil ls true.

2. PAGE BllDRf ls Èruc lf bÍt VA<rt) ls ! one.
3. tïrc COIISTAXTS arc contlnuously dlsablcd.
Hhcn ÀDD CBIP ID ls lou, the ÀDDRESS CBIP functlona as thc least
slgnlfleant byte. lÍtrcn ADD CHIP ID ls htgh, Èhc ÀDDRESS CHIP
Íunctlons 18 one of the three roat signltlcant bytcs.
PÀGE BtlIf,ï: lf ADD CUIP ID ls lou, PÀcE BXDRï ls htgh uhen blts
YA<07:t3) arc all oncs. If ÀDD CHIP ID ls hlgh, PAGE BNDRY ts high
vhen YA<tr> lg a onc.
IEEQ YÀ 3Or ISEQ VA OO ls hlgh vhcn btt VAOO ls a onc.
FC(12:le)z XB FC<r2zCe) arc hÍgh rhcn blte PC(e2:OC)
fsrPGCtlVCly are oncs.
EXA VA L (LOt IRUE): lf

ENA VÀ L le truc durtng BCLK lou ttne, thc
tnforrrtlon on the output of Èhe addcr vlll bc loade<l lnto thc VA
rcalaÈcr at the lou to htgh transltlon of BCLI(.
EtlA VÀ SA\rE (LCn TRUEI: lÍhcn tl{A VA SAVE lg truc, thc VA SAVE
laÈch rtll be cnabled durlng BCLK lor ttre. tftrllc Èhc VÀ SAIrE latch
the lor to htgh
tr cnablcd, thc ouÈpuÈs uÍll follor thc tnputs.
prcsent
^t
BCLK,
the
lnforaatlon
the
lnputs rtll be
on
transltlon of

rG:a lncd .

EUA FC (Lolí TRUE): If EllA FC lg truc durlng BCtf lou tllc,

tnforraÈton aÈ thc output of thc vA sAvE latch tlll

Èhe

bc loadcd lnto
BCLf,.
hÍgh
lor
to
traneltlon
of
If EtlÀ VA
FC
on
the
rcAteter
thc
VA
SÀVE
rlll
l;
true,
thc
latch
bc
tranaprrentr
and thc
alro
SAVE
rlll
FC
thc
eddcr
outPut.
tnÈo
be
tnfonatlon loaded
Ef,A FC EACIUP (tqf IRUEI: If El{À PC BACI(UP le true durlng BCLK lou
tÍrc, thc lnfonatlon aÈ the output of thc VA SAI/E latch rlll bc
loadcd tnto ths FC BÀCIUP rcalstcr on thc l,ou to hÍgh tranrltlon of
BCLi. tf EtA l/A SAVE lr alco truc, thc VA SAlt€ latch rlll bc
traneparGnt, and thc lnforration loadcd lnto Pe BACKUP rlll bc the

eddcr outPuÈ.

tAïtCH tÀ:

tlhtlc lÀïlCH nA ls htgh, Èhe t{À letch Ís ÈrcnsparcnÈ and

P.rtot data dlrcetly fror thc ltA IIULTIPLEXER to the llÀD. Ilrcn Í,AIEH
tA lt lor aÈ r lor to htgh transltlon of BCLK' the data that vas
prctrrnt on thc letch tnputs at thc prcvlous hlgh to lou transtton
of ECtf lr rctrlncd ln thc latch untll Èhc nert lou to hlgh
trenrltlon of BCLi oecurt rtth IATCH tíA hlgh, at thlch Èlne the
letch becoret transParent rgatn.
ASRC SEL: tttc ASRC SEL ptnr control rtraÈ data wlll bc cnablcd onto
the A IXPUT of the edder accordlng Èo thc follorlng Table:
+-------+----------------+
---+--------+-I
| Àsnc sEL s2 H I AsRc sEL sl lt I rsnc sEL se H I e lilPuT
+-------+----------------+
-----+----+---lualLffluorlol
+-------t----------------t
---+--------+-lttcH
L(D
l+l
I
I
LOIITGËILfr
l+2
I
lrIGrl
lrtcn
L([
l+l
I
I
I

ESRC E3t Sl U

ESRS ::L

St f,

B IXPUT

trrcB

Lff

VT SAVE

[rcB

I|IGH

tA 83Lf?r ilrr tA SILBC! plnt control Ílrt drtr utll bG
rnrblrd onto th. lnputt ol th. tA trtch rccordlrq to thc
tollorlng trblrr
|'oooeooo----------+-----

I re 83LEr 8t r I

foeooooo

--+-----

------+-

ne ErLlcr st u
------+-

tA
I
I
+-----------------0----I

rlcf,

rrcr

xrGE

+-------

I
------+-

---------+

H rrpnT

---------+

IrcRAEITER I
---------+
FC BàCTUP I

--+----------+---------+
CÀRRI llr
CÀRRI lx lr tho c.rry tnto thr addrr fror r lcre
rlgnlttcrnt !!!g?. CÀnnl II le lor Íor . c.rry qnd htgh Íor no
c.rrt7. It rltl b. tl.d hlgh on thr leert tlgótflernt-chlp.
CARRï GtIl
CARRI GBr tnd CARRI PROP rrc thc addcr c.rry
lool-rhrrd rlgnelrr rrÉ rrr drrtgnod to bc ccpeteblc rtth thc
7a8lt2 crrry lool-therd goncrctor. CÀRRY GEX lr htgh rlrcn the
rrr of th. A crÉ B rddrr lnputr (ln onc ehlpl le groatcr than
or rqual to ?? (BEX!. tUo outFrt plnr drtvc thlr rlgnal to
provlde thc l6re rcqulrcd by tho G lnput on.?lSlE2.
CARRI PiOP: (Ser CÀRRI GEX rbovel. CARRI PROP lc htgh ràcn
both th. À arÉ B rddcr lnputs rt any blt polltlon (vlthln the
chlpl tr. onot.
IXC CARRI II tr thc crrry lnto thc IllCREllExtER
IXC CÀRRI II:
fror t lcr rlgnlflcrnt 3ttgct lor ' ccrrtt, hlgh r no ctrrtT.
If ÀDD CIIP ID tt lor, IIC CARRI IX hel no cffeeÈ. lf ADD CIIP
ID lr htgh arÉ lxe GARRI Ir tr lor, rhc IxcRErExTER edds onc
to thc vrlue of FC ln thtt chlP.
ItlC CARRï OUT: IXC CARRI OUT ls lou for .n IXCRETEITER carry
out and hlgh for no ctrrtr. ttc IXCREiEITER ln a chtp ganGrttca
CËIP ID lt lou and blts FC<072C2) erc all
r crrry (lor1 tf
^DD ID ll htgh, bltr FC<l?:ee) tre all ones,
oncs or tf ÀDD CËIP
and It|C CARRI Ix lg lor.
CqP iODE: If C(nP IODE lr htgh, Èhc outPuts of the llÀ
iULTIPLEIER arc forccd to zcroes.

EXA YA SAYE L ---> t
PAGE EIDRï f, <--- lcz
BSRC S?L SO rl ---> t 13

t---> iAD16R

| 7 i---> iAD t5 Ë
a6 t---> IXC CARRï OUT L
{ 5 t---> IIAD
H

ttl

at t---> rÀD '7
cl B
t3t<--- EIÀVÀL
nrTa ---> tr?
a2 t <--- ETIA FC L
ASRC SEt S' B ---> tf8
al t<--- f,A SELECT SI H
CARRT GEX I U <--- ta9
at t <--- C(NP iODE H
CÀRRT GEX 2 A <---tla
39 I <--- TÀ SELECI S' A
BSRC STL SI B ---> t lt
3t r ---- GROIIID
rcA ----tl2 .LTD. 37 t <--- ECLTL
YCC ----rl3 . D(rx. 36 t <--- EXA FC 8ÀCTUP L
CARRT PROP T <---tll aa
I ---- GROIilD
rartf, --->tl5 aaaaaao 35
3l t <--- TAICË tA L
ÀsRc sEL s2 Ë --->tl6
3t r ---> rÀD t3 B
18 t, ll --->ll7
32 t ---> n Fc a2n
ratSB --->tl8
3l r---> rAD
H
m a2n --->tl9
3t t ---> rFcelB
''
ASRC SEL SI H ---> l2'
29 I <--- IIC CARRY IX t
mttn ----> t 2l
28 t---> ||AD32N
CARRT III L ---> 122
27 I ---> rAD 9I H
trsEQ nA te H <---r23
26 I <--- FORCE r^
H
ADD SAIP TD H ---> t2l
25 t ---> XBFC''B'I

TBt6A ---> tr5
TE'5A ---> tf6

aaaaaaa
ao

ADD FIGURS I

PIN CONFIGURATIOI{ DIAGRAN AXD PIX IDEXTIFICATION

3.3
t.

Am388 CCTROL CrtP (ADr-r626'
GlIBtAl, DESCRT PllO I

tlrr ADI cht-p g.n.r!tc. .oat of the slgnals necessary to
control thr tr.nrlttlon
buffcr and conta lns the
Itrtur./control rcg lrtors àa8oclatcd ul th the translation
buffcr.
In addltlon, ADK gcncraÈes several control
tlgnelr for thc IIR and ADD blt slice chlps.

À[ tttt.3 I
Ptn ldontttlcrtton erÉ Gtro fyF
I

Irtr I I PtI ID
a2

cmmt

DSUS SEL Sl f,

GAtfff,

rEus 25 x
Ets 2a Ë

GATÍI?

Frrs 26 E

GAIlN ?
GA ITZ F

nus 27 n

GAI"ZF

T!GRP'MH
TEGNPIMB
TB [I? I II

tEnI?tu

l8
f9

lr,

lrr
lr{

EXA YÀ L
T.àTCHED TCTRL

lrs
lr6
lr7
lr8

BSRC SEL SC H
I.ATICBED TCTRL
IATCTED TCTRL
LAICBED TCTRL
BSRC SEL SI H
LATCËED XCTRT
tArcBED TCTRL

l19

l20

l2r

cLr sEt s0 H
cLr sEL sl ll

122
123

Gttt ?tP3

PBÀSE I

GAITtï

IOL . 2rrÀ

GAIl\C?

IOL . 2trA

GAIllCF

GAlrÍrr

GÀlrlï

2lr

GAI?XF

cll

GAITXF
GÀITXF
GAI?XF

lll
IH

GAITXF
GAITXF

GAITt!

GAITTï

GATTTX

GAlrnr

PREPEI'ICI L
LATCEED DUS I
PTE CBDCT L

GAITXF
GAIr T
GAITTI|
GAITXF
G' ITTX
GA:TXF
GAITTF

32
33

tÀTctrED BUS C H
IArc8ED BUS 3 H

GATTI{F
GAI?T{F

,21

125
126

EUS SEL S0 ll
TB OUTPUT EIIA L

127
2E

TATCBED 8US 2

COIP TODE H

36
37
39

la
ll
l2
t3

lrr

lrs

lr6
la7
lr8

IOL - 12 nA

GÀlrtï

TB PARITï EI{A H
I
I
I

I
I
I

GAITTX
GAITNF
GATIXF
GÀITNF
GAITilF

BUSIE

D CLT EXABLE II
T CLtr EXABLE II
STATUS YALID L

R?UT DTXH t
PSL Cn I

GÀTTT{F

GAITNF
GÀITNF
GÀITNF
GAITNII
GA:TNF
'.rA ITTN
I GÀITNF

SIIAPSBOT CTI L

MITE YECT OCC L
NUX SEL SI H

DST RTODE H
ATUX SEL SO H

BCLTL

PerÍorrrDcls
AU( t/O Ptxs
IIPUTS

IPIXS

BCLTL

I
I
I
I
I
I
I
I
I
I
I
I
I
I

lusatr

D CLT EI^BTE H
D6t nroDE tl
lAlCBtD BUS (t: O) H

tAltllED rctnL ( 5: C ) H6

r CLT EIABLE H

nux srl sl ll
PUÀSE t

PNE?EITII L
PSL CT H
SIAPSnO? Crt L
STÀ?US YALID L
RTUT DTXH L

TRITE VECI CC L

8I-DIRTCTIOXAT LIXES (TRt -STATE UTLESS OTIrEËrtSE NOTED}

TB HIT <l:3) H
m US (27 r,21 > H

2 (OPEN{OLL. )

OU"FUTS (TO|lEtr FOIE u[tEss oTHERTISE NOTED)

tnUX SEL S<l:0) H
ESRC SEL S<l:0) H

CLI SEL S(l:r> ll

CGP TODE H
f US SEL S<l:e ) H

EXÀ VA L
PTE CHDCT L
TB GRP (l: l) XR tl
t8 ouTPuT EXÀ t

18 PÀRITï EilA II

2.1

T|te follouing ls a list of the code
Codc ArslgnCnt.:
assignrents for thê EUS FlrxCtION llcro field:
E. READ PHïSICÀL ADDRESS
I. PROCESSOR TXITIATIZE
2. READ, XO iICRO-IRAP
3. I/O INITIALIZE
I. READ LCf, TINEOUT TEST
5. tfoP
6. READ, SECOID REFERETCE
7. ltoP
E. WRITE PHYSICAL ÀDDRESS
9. REI CNECT
A. HRITE, SECOIID REFEREIICE
B. WRI?E tf,LCK, SECOND REFERETrcE
c. WRITE, llo llIcRo-TRrP
D. NOP
E. HRITE LOTIGTORD, NO I{ ICRO-TRAP
F. 8US GRANT
15. READ
II. READ LOTGHORD
12. FTE ACCESS CHECK, ilRrtE
13. READ LOCT
II. REÀD TITH IIODIFT INTENT
r5. REÀD LOXGTORD HITH iODIFY IXTENT
16. PTE ACCESS 3HECK, READ
17. FTE ACCESS CHECT, REÀD, KERNEL rODE
18. wRlrE
19. HRIIE LOilGHORD
TA. TRTTE IF T{OT RIIODE
lB. rRl?E lltl.ocx
lc. pRoEE ÀCCESS, tRrTE, lrODE SPECTFTED
lD. PROBE ACCESS, ïRITE
lE. PROBE ACCESS, READ, trODE SPECIFIED
tF. PROBE ACCESS, READ

Bus Functlons are dccoded froa

TLATCHED BUS ,l

H'(FLIP-FLOP) end 'IATCHED BUS <3:0> H..

2.2

(hrtlrl Llrtl : ?hc f ol lorl n9 i s r
oÍ codc rsrlgrrcnts for thc ICTRL ticro

Cod. A.tlgtrrtrt.

Pattl.l llrt
Í lrld :
aa.
2a.

PSt

21.
22.

vA <- YA SÀYE + (rAuS t

23.
2ll.
23.

26.
27.
28.
29.

VA
FC

YA<-YA+.
rm
FC

tElrs <- rm

t3 ntA

TA YALID BII <YA

2^.
?s.
2C.
2D.

2e.
2?.

3r.

31.

t2.

33.
31.
35.
37.
3E.

39.
3A.

38.
3c.
3D.

38.
3F.

tm
FC

CACHE YALID BIT
YA

IN
tm (- oERr zERo EXTEXDED

ST tIJS/COxtROt REGISTER <- rEuS<2722l>
PREYIOUS iODE REGISTER <- IBUS<23222>

IBIrS<272 2l> <- SIA?US/COITROL REGIS?ER
BUS GRAXT
SIA?US./C(IITROL ADDRESS REGISTER <- HBUS<2?z 2l>
ISlClnRExt iODE REGISTER <- IEUS<26:21>
RET CIIECI
REGISTER <- IBIrS<26:21)
(RESERYEDI
^STLYL
IElrS<26:21) <- ÀSTLYa REGISTER
(nESERYED'

HlGllES? SOPIïARE IPR REGISTER <- IBUS<2O:16)
IPL R8GISTER <- IBUS<20:16)
xoP
IBUS<20: t6>

ICTRL FuncÈlonc erc decodcd froa 'IATCHED ICTRL (5:e)
ll. .

2.1

Internrl 8Í9nrl DflnltÍon3:
D FLTP-FLOP (RISIXG EDGE oF '6 CLtr L')
I'STATUS YAL II'

D IIIPUT:

,STATI'S YALTD II'

Itre flop is lE CLEARED vhen 'STATUS VALID H' is FALSE.
I'IATCHED BUS H' - JT FLIP-FLOP
'
J t"::":r.
E*ABLE r.

r 'Bus I r'

T IXPU?:
'I CLtr EXABLE H' T 'BUS L'
'
I'PREFEïCH DEL H - D FLIP-FLOP

D IT{PUT:

.PREFETCH H'

Ttre flop is DC clcared if:

+ .PROC INIT H.
I'PREFEIICH CYC H D FtIP-FLOP
.PREFETCII L'

D INPUT:

.PREFETCII DEL H'

ftte flop is E PRESET uhcn 'PREFETCH DEL H' is ïRUE.
.'BUS CfC DEC H' is TRUE for any of the follouing Bus
Functlon Decodcs:

READ PIIISICAL ADDRESS

RE\D, XO rICRO-TRÀP

READ L(rcT TITEOUT IEST
REÀD, SECOXD REFEREXCE

ïRITE PHïSICAL ÀDDRESS

WRITE, SEC(X'ID REFERETICE

IRITE Ut|L(rtr, SECOilD REFERET.CE
HRITE, NO iICRO-TRÀP

rRtTE LOXGTORD, l|O nICRO-TR P
BI'S GRÀTT
REÀD

READ LONGT{ORD
REÀD LOCK
REÀD WITH iODIFT INTENT
REÀD LONGIIORD HIIIT IIODTFY TNTENT
WRITE

I{RITE LONGTORD
WRITE UNLOCK

IDST RIIODE LT r dNTTE IF NOT RTITODE

.'BlrS GRÀNT DEC Hr ls TRUE for: (Bus Functlon Decodel
BUS GRAIIT

.'PHIS DEC H' ls lnUE for: (Bus FuncÈion Decodesl
READ PHTSTCÀL ADDRESS

TRITE PHYSICAL ÀDDRESS
.'PROC INIT H' ls TRUE tf:

'PHÀSE I L' t PROCESSOR INITIALIZE (Bus Function

Decodel

i'lfRITE TB H' ls IRUE lf :
[28 + 291 (tfCTRL Decodes)
.'CA INVAL H' ls TRUE if:
[2Dl (TCTRL Decode]

.'PTE CllECl( ll' ls IRUE for: (Bus Function Decodes)
PTE ACCESS CHECX, rRrTE

PtE

CnECX, RAAD

ACCESS CHECT, READ, KEnl|EL |{ODE
PTE ^CCESS

.'BlrS REQ B' ie TRUE if :
.8US CTC DEC H. E .PREFETICII L.

I'DEST VA llr ls IRUE lf :
JzC + 2l + 22 + 25 + 29 + 2Dl (tfCTRL Dccodes)

.'FULL ADD H' ls TRUE for: (Bus Functlon Decodesl
READ PHïSTCAL ADDRESS
REÀD, XO TICRO-TRAP

WRIIE PTïSICAL ADDRESS

ÍRITE, IO rICRO-TRAP
t{RrtE u)rcrfiD, xo tlcRo-TRAP
PR(DE ACCE6S, rRtTE, iODE SPECIptED
DnGE ACCESS, rRrTE

PnoBE ACCESS, READ, iODE SPECIFTED
PR(D8 ACCESS, REÀD

r'IATCIIED HIT I H' le thc HIGH IRUE output of r lateh
rhlch lr cnablcd durlng:
rPËASE I H'

T.ATCH Input ls:

.TB HIT I H'
.'III\CHED HIT O H' ls the HIGH TRUE outPut of a latch
rhich ls enabled during:
'
.PHASE I

II'

L TCH lnput ls:
.TB HIT O H'
>>NOTE: 'ADD REG ENÀ H' has not yet been defined.
'ItfVAL CHECK H' nas not yet been def ined.

.'ËElrl REQ H' is TRUE if :
I.PREFETCH DEL H. +
('BUS CYC DEC H' t 'PREFETCH L' & 'REPLACEI'IENT L') I
(.ADD REG ENÀ H' + 'CYC IN PROG L')
T.REPLACEIIENT II.

IS TRUE i f :
.STÀ?US VAL H' I 'ÀDD ENA DEL L' É 'READ H'
I'ADD REG ENA H - JK FLIP-FLOP
J INPUT:
'ËElt REQ H' & TTNVAL CHECK L'
K INPUT:
.PREFETCH CYC H' + 'Ií CLI( ENABLE H'

I'ADD ENÀ DEL H
D INPUT:

D FLIP-FLOP

.ADD REG ENÀ H'

Ttre flop ls E PRESET when 'ADD REG ENA H' is T?UE.
.'RESET ÀDD ENA H' is TRUE lf:

.T CLK E.IIABLE HI + TPREFETCH CYC II'
I'INVÀL CHECK H . JK FLIP-FLOP

J INPUT:

(.ttltux sEL sl L. t .silApsHoT ctl H.) 3

[ ('ADD REG ENA H' t 'RESET ADD ENA H') + .nEt REe L.

K INPUT:
TSNAPSHOT Cttl L'

STÀTUSI/COXIROL ÀDDRESS nECISTER: ?hG
SlC ÀDDRES
REGISTER lt r a blt lrtch yhlch 13.n.blcd durlng!

'3 CLi N' f D CLi 8XÀaLE f' f
srÀTusTco rRo! ÀDDnEss REGrS?ER <- rBus <27!21>(rlcÍR

Irccodrl
lÀlcll lnput3.r.! .I8us <27:2a> B.
llltfl OrtPuÈr rr.! 'SC ldd <3tl> H'
STTIUS/CflTROL REGISIEiS
iil REGISTER3 Íic IiE REGISTER la r onc biè lrtch
rhlch la cn.bl.d durlng:
.a cLI f,. I .D CLi EXATLE lt. r
'sC ÀDD ! L' r 'sC ÀDD 2 L' r 'SC ADD I L'r.SC ADD
,i L' T
SIÀ?US,/COIIROL REGISTER <- tBuS <27:2{) (tfCTtL
D.codc,
2a Hr
l ltcí hPut lr: 'mUS
Ilïtl Output la: .titE Br
tlr. lrrch ls Ír clc.rcd uhcn 'PROC IttIT H' lE lRuE.
t.RltE YELIOR
IRIIE VECTToR CCITRRED REGISIER: ïh.
(ECInRED RECISIEn 13 ! onC blt l.tch vhlch l3 .n.b!.d
duÍlng:
ll' t 'D CLÍ
EXÀB!8 H' t
'a CLX
rSC ÀDD 2 L' 3
tDO
l't
3
'SC ÀDD I ||r t 'SC ÀDD
'SC
tL.t
' SIA?US,/COXTROL REGISTER <- ÍbUS <2t3 2l>(t|C?RL
lrccoda,

lÀICu Input 13: 'HBlts 2a l|'
lÀtrcf, output lr' 'IR vBcT Í'

It. lrtch lr E clGlr.d by:
.pn(r IItt l|. +
('8lrs CRrXt DEC ll' t 'Plnse I í' t 'B CLi ll'l
ttc lrtch Í. lr PRESET rhcn 'rRrfÊ YECT occ H' 13 lRuE.
lB GnoUP DlsAtll REGISIER: lh. tB GtouP DISABLE
REGtStln lr ! { blt lrtch rhlch l3.n.btcd durlngr
l' r 'D clr EIASLE ll' I
'a
.sccll
ADD 3 L. & .6C tDO 2 L. a .SC ÀDD I Í. É .SC ÀDD
tr.a
'AIÀIUS,/COITFOL tlclStBn <- I.BUS <27t24)(tctlL
D.cod.t

IÀTClt tnpura arc: .rírUS <2?:2a> r'
IATCA Orlputa.!.: .Tg CTL <1:r> l|.

th. lrtchês rrC DC clerr.d rhen 'Pn(f IIIT lt' 13 mUE.
cU|RREl|t ]toDE REGISTER3 tt|Ê ctnnErr ioDE REGtstER is a 2

blt latch ehlch 13 enabled durlng:
(.8 cLt( ll. r .D CLt eIÀ8LE l|.) r
ÍIS,/CURREXT iODE REGISTER <- IíEUS <26:2a>(taCRTL
D.codel + pSL <- llllrs, (ICTRL hcodctI
lÀ!Cl| lnpurs .re: .rtUS <25:2a> l|.
llltH OutPuts rrC: 'CtR I|ODE <l:C> U'
I'REPLÀCE e lt - D FLIP-FI,O'
D I[{PUT!

('lia CTL 3ll'r rTa cTL 2 L'l +
('TB CTL 3 L' t 'REPLACE E LTI
thc flop lB lr PRESET uhen 'PR(r tNtT H' ls ITUE.
..CIC lX PROG lt. ls thc IIGB TRUE output of àn RS
FLIp-pfOp yhtch !s sÊr by!
.tDD REG EitÀ tt.

.nd reset bys
'S'ÀTUS VAL ll'

+ 'PROC IIIIT ll'
.'RE D ll' ts thc l|lGH TRUE output of ! lrtch fhlch ls
durlng3
"n.bt.d
'ÀDD REG Et{A H'

IATCÍ Input lr3
.pREFETclt H. ? .tAtcíED BUs t L.

rrcÀCll8 CIC H' l! IRUE tf:
(.ÀDD REG Ef,A r. + .Cl'c rX PROG L.) r
('PiBFETCII DEL B' + '8US RgO H.l .
('ÀDD ETÀ DEL N' + .SIATUS VAL L. + .REÀD L.I

i'PllYS ADD H. lr IRUê lf:

('ItlvÀL CHICr l' r 'CACHE CYC .l s
I.||Í'|E L. + iE[D pFfStCÀL ADDRESS {Bu! Functton Dccodel
+ tRIrE PltlstcÀ! ÀDDREss (8ur punctlon D"cod!)t

SAV'ED iODE REGISTERs The SAVDD iODE REGISTER ls

blt latch. BlÈs (2:0) arc enabled durtng:

a I

i
CLI( ENABLE lt. t
Í.8 CLK H. t .D rSC
.sC
.sC ÀDD
ADD
L.
3
ÀDD
t
2
L.
ÀDD
L.
t
I
t
'SC
. II' T STATUS./CONTROL REGISTER
Ilecodc)l + (.BUS CyC DEC H. t.BUS GRANT DEC L. Í.D
CLf EI{ABLE H' t'B CLI( H. t .RTUT DINH L.)
Btt <3> ls enabled durlng:
CLK ENÀ8LE Hr &
Í'B CLK H. t .D .SC
ADD
L.
3
ADD 2 L. t rSC ADD I L. t .sC ÀDD
t
'sc
g H' r STATUS/COXTROL REGTSTER
Decode) I +
(IADD REG EttiÀ nr e 'RE D H' t 'IÁTCHED BUS 4 H't
TPREFETCI| L. t .B CLK H.)
IATCII OuÈputs ares 'SAI/ED IIODE (3:e ) H'
'SÀVED iODE 3 H' TATCH Input ls:
( 'ïBUS 27 1l' t 'BUs CYc DEC L'l +
(rÍaTcHED BUS 2 L. t .t TCHED BUS I L. s .BUS CyC DEC H.)
'SAYED iODE 2 Hr TATCH Input ls:
('ïBUS 26 H' I '8US CIC DEC L') +
(.PHYS ADD Hr t 'BUS eyc DEC H'l
'SAVED ttODE I ll' IÀTCH lnput ts'
('I8US 25 H' t '8US CYC DEC L') +
('cuR ioDE I H' t '8.US CIC DEC H''
'SiÀVED iODE e H' IÀTCH Input le'

('wBus 2a H' s 'BUS CïC DEC L'l +
(.cm l|oDE t Hr r rBus crc DEc H'l
The latchcs are DC clearcd vhen 'PROC INIT Hr ls TRUE.

.'EtA ïBUS ll' ls IRUE lf :
(rpnAst I L' 3 'sc ADD 3 L' t 'SC ADD 2 L'l t

ÍrBUS (27221)

Occodcl I

.'PA IBUS U' lc TRUE lf:
(.lxvAL cl|DcÍ L' e 'stATus YAL L' t
.CIC TI PN(F L' I 'PRE?E1iCH
L') E
(.rRItE t8 ['+ 'CA rrVAL ll' + ',PTE CHECI( H'l

.'PÀ 8US DATÀ H' ls TRUE lf:
('STATUS VAL L' t 'CYC IN PROG L' T .PREFETCH L.I I
(IIÍRITE TB H' + 'PTE CHECK H')

r.CLK T{DR H' IS TRUE IF:
(.RTUT DINH H' t 'ÀDD REG ENA H' &

.IATCHED BUS 3 L.) +
'PREFETCH L. t
'il cLt( ENÀBLE H' r Í2À + 2E(WCTRL Decodes) |
r 'CLK ilDR rH' i s IRUE i f :

'D CLK ENÀ8LE H' t t23 + 27 + 28 + 2F([{CTRL Decodes) I
+ [ (.cYc IN PROG H' r 'STÀTdS VAL L't
'PREFETCH DEL L' t 'SCND REF L) t
('BUS GRÀNT DEC H' + 'ADD REG El{À L' + 'D CLK ENÀBLE
I L' + 'ADD REG ENÀ L') t
H'I E (.PHÀSE
('RAAD H' + IBUS GRÀN? DEC Ï.)l
.'ScllD REF H' ls the HIGH TRUE ouÈput of a làtch uhlch
'
is enabled durlngs
.ADD REG 8NA H'
I.ÀTCH Input ts: (8us Functlon Decodes)
READ LOCK TITEOUT TEST +
READ, SECOND REFERENCE

.'FORCE ÍDUS Clll H' ls TtUE lf :

('ÀDD REG ENA L' t 'REÀD H' t 'CYC IN PROG H') +
(.BUS GRAI|T DEC H. r .PREFETCH DEt L. r TPHASE I L.)
+ (TSTATUS VAL H' ó IADD ENA DEL L' t 'READ H')
.'DBUS SEL Sl H' ls TRUE lf:

'PA 8US DÀTA H' +

(ICYC IN PROG H' t 'ADD REG ENA L' t 'RE^D L')
.FORCE DEUS CÏT L' 3 ('ADD REG ENA L' + .RAÀD L')
('ADD REG EilÀ H' + 'BUS CIC DEC L') t
('CACHE CIC L' + 'PREFEI\CII DEt L'l

123 + 26 + 27 + 2t + 29 + 2A + 28 + 2E + 2F (WCTRL
Decodcsl I
.'DBUS SEL Se Ë' ls tRUE lf:
'FORCE DBUS Cill H' +
('ADD REG ENA L' + 'REÀD L.) t
('ADD REG EtA H. + .BUS CYC DEC L.)
('CACHE CYC L' + TPREFETCH DEL L.) r
Í26 + 27 + 28 + 2F(WCTRL Decodcs) |

ILI?-!UrP DllItIt{tS:
All fllp-floF
tlSlIG .Ca. oÍ 'l CLI L..

rÍc cloctcd on the

f.taTcrSD lts a I - JR tLtP{u)P
J tltult
.i CLI ltAlll S' ó.llrs I H.
I llEul3
'l CLt lIABtl X't'3tS a L.
lrlnttEltf, D8L || - D ?LtP-lu)p
D II?UI:

.?iSt8tcr H.
tt. llop l. DC clclr.d lf!
.PRllRtCf, L. + 'PR(f lllt f,.
l.tnttllrcr crc r - D FLtP-atoP
D l!|ltt Ts
'PnElÊlcf, DGL ll'
th. flop lr E DRESI? rà.n r?nl?ElcH DCL ||' lr IRUE.
l'UïtÀ? DtL I - D ILIP-!LOP
D IIN'I:
rutnÀP xr

t|!. flop l! E cl..r.d ít.n 'um P !|' l. lÀLsl.
I'ÀDD TIG ElÀ T - JI ILII-'I'P
J IIpUtt
ri8 nto I. c .trVÀL C||tCt L.
Í IIpUtr
.PnE EICX ClC r|. + rrl CLI EIÀIIE ll'
I'TDD EIÀ DEL X - D ILI?.FIT'P
D lIPUlr

.ADO REG EXA II'

ft. flop tr E PnESSt rhln 'Alrlt REG EtlÀ H' lr 1iUE.
I'IIYÀL CIIECi tr - Ji ILIP-?Ií)P
J IIPUT:
(.nux s3L sl L' & 'ErÀPslloÍ crr l|'l r
Í(IÀDD NIG EIÀ f,' T 'RESEI ÀDD ETÀ It'' + 'IIEi REQ L'I
35

I IIPUT:
'sxAPrsÍot cir L'
l'nEPl.àCE t ll - D FLIP-FLOP
D IIPUT:

í'lE CIL 3 ll' t 'tA CtL 2 L't +
('lA Cll f L' t 'REPIÀCE t L'l
ttc flop lr E lnESEI eà.n 'PR(E larlT l|' ls lxlrE.
cf,rP orJÍPuts

>)> 'lA Xlt I ll' (OPEI COLLECToR, BI-DIRECTIOf,ÀL, la drlvèrl
Ld tÍ:
'tB cTl I H'
>)> 'fB l|lt , ll' (OPEX COLLECIOR, A!-DIREC'IOIÀLI ls driven
L(l| tÍ:
'13 C"L t ll'
>>) 'HBlrS 2? ll' íTRI-STÀIE. 3t -DtRECtIOllÀLl is cn.blGd tf:
'ExA mus l|'

lnd la 1IUE (||lcH) tf:
(.sc tDD I a. r .sc ADD a l|. r .la cTL 3 N.t +
(.sc ADD I L' r .sc ÀDD , l|r r .sÀvÉtr ioDE 3 t|.1
.IAUS
))>
26 t|r (TRI-STÀTE, B!-DIRBC'IOXÀ!| ia Cnrblcd lf:
.ElrA taBus u.

.nd ts taUE (l|tcH, tt:
(.SC ADD I [r e 'sc ÀDD a n. r .tB CTL 2 t|.t +
(.sc ADD I L. r .SC ADD a lt. r .SÀVED iODE 2 n.l
>>> 'f8lrs 25 ll' (lnl-SIÀTE, Bl-DtnÊCltOIALl l..n.blcd
'EXA IBUS II'
.nd lr IRUE lXlcl|t tf:
(.sc ADn I N. r .SC ADD n. r rtB cTL I N.l +
('SC ÀDD I L' t .SC ADD 'I d. r . SI'VED ||ODE I ||.t

tf:

>>> 'Illls 2l r' (lnl -6TÀll, ll-DtlECltOHLl lt en.blcd lf:

'lIÀ IBIrS X'
rnd l. lnul (l|lclt ll r
ÀDD I f. r.SC ÀDD t t|. r.lE CTL t 8.1 +
í.*
(.sc ÀDo I N. r.sc tDo I L. r.m YECT r., +
(.8C ÀDD I L. r .AC ÀD I r. 5 .AÀVÊD iODÊ a l|.t +
('8C ÀDD I L't -6C ADO I L'Ê 'ltE i't
>>> 'llllt srl 5l ll' t3 tnur (trtclt ttr

.PA ítUS X. + .PX!S ÀDD l|.

n' tr ttul (rlci, tft
.rxYÀL ctEr Í. + .pÀ tus DttÀ ||.
>>> '35tC SIL Sl [' l. ltul (XlGx, lf:
(.lÀ!cl3D l{clnl 3 L. r .ttlciED rctnl 2 L. r rPf,AsE I L.l
>>> '3SnC SEI St r. lr lnu? (llGE) tfr
t l'+
'Pllsl
(
lCfBD rclRL t L'l +
I I' ó 't.rl!cf3D
'lÀlcilD íClnL
(.trlcrtD
rcttl
I
l.
3
rclnl I L.l
>>> .ctl a3L sl r. l. lnuS (lrcll lf:
rn I' +
'clt
(.PnEtSlcr DGL f' r
Yll L'l
>>> 'tlul

8EL It

'atAlus
>>> .CLl AIL St tr. l. lrUB (llcrl lfr
.ctr rn x. + .clr in r'
>>> .'CdP iODG f,' lr lnul IIIGN' tt!
iPAL CI II' t ('PNE?ETC[ B' + 'FULL ADD L''

>>) .DUS SEL Sl E' lr lnUE (nIGEl Íf3
.D3US AEL Sl f.
>>> 'DUS SIL Sa l. lr lnUE (f,Icf,l lÍ:
.DAUE 9ÈL 6a r. + rtfrCl AUS Cit l|'
>>> 'BIA YA L' tr IRUB (Ldl lf :
.DAA' Yl lr. r 'D CLi 3rt"3LE f,'

>>) .t,rE CBEi L. t3 ttuE (Ldl lÍ!
t.PtE CEECT n. + 'I1I?E lA 11'l I 'PREFEltCtl L'
>)> .tB GnP I In tr. 13 IRUB (Etcrt lf!

(rctnl Dccod.l

CllECt L' t 29
I
l'tML
.D
CLi EXIALI X. a 23(ICtnL D.codct r

[.r tcHED trt tN. + (.ra|EBED l|tt a L. r .REPLACE r L'rl
)>> 'llGnP lm l|. l. IRUE (xlc lf!
D.codo, I +
Í'trlrl C||ECI L' s 29 (rcÍRL
(ÍClnL
2E
'D CLi EXÀILE ll' a +
(.t

D.cod.l t
HrT I L. r .nEPL CE a i.tl
Xtt
I
t.
tcl|eD
I.IA!C||3D
>>> 'lB outPul ErÀ Lr l! tnul (L(xl lf:
.rrytl clEct L. I .PA raus L. r .Pnts ÀDD L' r 'P.\ 8us
DTI L'
Í.ADO RB; IIA [' +
l.Dlrrs sBL sl L' r 'Dlus sEL st L' r '?mcE lDus cÍll l'r l
>>> .lt PAnrrt txÀ r. Ir muB 0[Gx) it:
'nE N' t DIL I'+ ('AUS GRÀr? DEC L' r
DEC L.tl
'PB!S

ÍrpR8FEtrcl|

HUI 83L EI E <--- t rl
DuS 83L 8t Ë <--- tt2
r3lrs 26 l (--) lf3
ntt 25 r (---) lf f
r!18 2a e <--> t t5
Ilts 2? E <--> tt6
TEGNP'TRI <--- lt7

l8t<--- B CLr L
a?t--->
sgt s, r
f 6 t <--- ^tur
Et noDS x
lst<--- uux sEÍ, st s
ll t <--- nt?t Ytct cc
att<--- sr Psxor crt t
l2t<--- FsL cr E
al t<--- RTttT Dtrt L

TBHIT'E <---> ttt

TsGRPITRf, <--- tt9
a, t <--- strtïrs YtLrD L
TEf,ITII <-->tl! o...o.. 39t<--- r Ctr SrABlr x
EXA Vr t <---tll
o - . 3t r ---- GROTID
EA ----ll2 . LID . 37r<--- D CtI trAtlt u
ucc ----tl3 . Dqr. 36 t <--- Errs a r
latttrtD rctnt. 2 r --->tll.
. 35r---- CnOrrD
88rc 8tt s, r <---tl5 ....... tlt---> tt ef,nrtt trA r
TAIT!3D TCIRL 5 E ---> t l6
33r<--- tAtCttD llfs 3 [
rattf,tD rctRL , tr --->tl7
32 t <--- l^ttf,3D EUS t ll
l^ttBtD rqtnL 3 Ë ---> r lt
3lr---> Ptt ctScr r
BSrc sBt Sl A <--- t l9
3a t <--- talcltD Bus I tr
TATBED TSINL I I ---> t20
29t<--- Pn8?RrCE L
!ÀITBBD HCIRL I E ---> t 2t
2tt---> cGP roDC rl
ctf, stt sf tr <--- r 22
2?t<--- IÀttbtD Drrs 2 tr
ct.r s?L sl B <--- r23
26t---> tE OUtPUt EXA L
Pf,À68 I Ë ---> t2l
25t---> DBI'S StL St B
ADT ?IGURt I

PII COX?IGURAIIfl DTAGRM AXD PIX IDCX?IFICATIO}I

trttlEltc AD tstc cctnoc clt?, íAtr-85r5,
l. GlrtrrL D3srt"ttc:
3.4

tïrlr rpaelflcctlon dcflncs tha dctrll rcquircrcnts of rn
Àsltbctlc rrÉ Logfc C.ontrol ChÍp (ALf1 . Thc ALI chip
.cco:rplÍrbcr thc follorlng :
Al Rccncodor thc ALP control Íicld (ALFCtL! for srotc
rpcclrl
functlont.
Dt Controls thc ctÍrt/ lnput lnd rhtft lnputr for the
ALP ehlp.

Ct Drcodcr thc acr.tch Pad rïltc cneblc rlgnals.
D, Dceodcs acc rlsccr-llncour rlgnrlr.

ALT TÀELB I

Pln ldcntltÍcetlon end Getc IYpc

I c(nErrs
ttl

IPIIIIPIIID

!lII

lflg_l
IALPCTLOH

IALPCTL6

lz
18

-Í\l

lAsIooot-

IIX:-l2nÀ

!';;-r2aA
I "-

|ÀLPCTLIH

lROr3H
lRor{H

I
I

19
lfO
ITT
lrr
IT5
116
lr7

IRM2H
IDOUBLEENÀBLEH
IPSLCH
loFcoDE6H
IROTOH
loFcoDEsH
lRotlH

I
I
I
I
I
I
I

2E
2L
22
23
24
25
26

IALFCTLTH
ICÀRRYOUTL
|ÀLFCTL9H
IOPCODE{H
IOFCODEIH
IBY"EL
IDSIZE}H

I
I
I
I
I
I
I

28
29

ISIIíLENH
ISPWBENH

!r8
lr9

I3T
132
I33
13{
136
I37

lQDcLxL
lRmsE

I
I

ISPTTENH

I
I
I

lsttron
IDSIZEOH
lstt{lH

I
I
I

ILLITL
IALPCTL3H
IALPCTL 2II
IALPCTLsH

I
I
I
I

I
I
I
I
I

139 IBCDL
a4O lAtPcrLln
l.!f
lALrc3lL
112 loFcoDE olr
lArPcrLSH
ll3

lf{
l{5
f{6
127
ll8

lI.'r-l2mA
lIó;al2nA
| -|
I Io, . l2nA

l0SIO3lt
lQsIo15L
lrBUs3cH
|mus3ln
| QSIO ee L

I GATE ITPE

r6Tïe,--i
lGrl1rcc
|

!9|lTI

IGAITNF

lcÀITNF

lcAlTNF

lcÀlrxF
lcAlrNF

I
I
I

IGAITXF

lcAlTTN

IGAITNF

lcAlTTN

IGAITNF

lcÀITTN

lcAlTllF
lcÀlr1F

lcAlrNF

IGÀITNF

IGAITTï

;GÀITNG

lcAlfTr{

IGAITTN

IGÀIMX

IGÀITNF

lc^lrrï

IGAITTII
IGAITIN
lGAlTrrF
IGÀITXF

lcÀrTXF

IGÀI?XF

lcAlrrrF

IGAITXF
IGAITNF

lcAlrml

lcAlTNF

|GÀITNF
lGÀl?TN

lcÀtrltF
lGÀrlcc

lGÀITCF
IGAITZG

|GAlrzG

I GAlScG

Èrtcrr-rr

2.1

tgeclrl 3l;artr .tó Dollct!
tbe AtI chlp dccodcr trc
Íloldr Írc th. rlcroFrdr tho Al,gctL Ítrld rtÉ the Rot
ttrld. tn thr contort oÍ th. AL? loglc (rh. I ALP chtpt
elÉ th. ALI ehtpl , th. ALFgtt Ílcld contsol! thc r.ln
dttr lnput rclrctlon rnd ALU
op.Í.tlonr ruch..
otrr.tlon, rlrerell th. nOt llold eontrolr thc rurlllrry
oFr.tlon lrch .r rlectlng c.rrt/ lnputr rnd rhlft-ln
lnputt.

lreronlc
Dlv-

Dlv+

Rrttrrl+
tul tert

Dlvfrrt
nrl tl ply
Dlv ldr
DIYD-

DIUD+
DIVD

PASS S
ADD

slr8

ALU SL

An arcaptlon occur. rhcn botb Íleldr.ro
ured to
. rlcro-eodr llterrl. ttrll occur! rhcn thc
raprarent
tlllt L' lnput lr rt a 3,9 levol. llrdlr thlr corÉltlon,
rh. AL'|elt Ílrld rrÉ rh. rqt Ílcld lorr rh.l3 orlglnel
rrrnlng rnd .re dofuul trd to . cart.ln vrlue .t
rprclÍt.O ln 3octton 2.1.
tàroughout thle docncnt, rncronlcl .re urcd to
rop3.3.rrt rcc ccbtnrtlonr oÍ thc ALFCTL f lcld, lrÉ thc
rmonlcr .ro lr.nlngÍul only Íren thc LLtt L tnput lr
at a IIGI lrvrl. Iota that th. rncDnlcr.re not urod to
Íor crrplc,
ropr.lent ruturlly rrclurlvo cotÉltlonr,
tlul-'r
I
r
.
tupes-tot
oÍ
'lulo', lnd
'tultlplt'
'ltl Íatt'.
ALFCTL<9r615: Í, lrt)
Short dcrcrlptlon
Dlvlde rlth nca.tlvc dlvl<rend;
lffl llli rr
rlth Po.ltlvc Clvldend;
Dlvldc
ltll
I,
rtrl
tultlplï rlth neg.tlYC
lrfl lal! rl
rul tlpl lcrndr
tultlply rlth Fstrlvc
rl
lfr:, lll,
tultlpl lcrndr
tulttply et tuo
lorl lrl, ,l
t tcrrtlonr/eyclc r
Dlvldc rt tr?
lstl lxll aa
I te rrt lont./cyc I e I
lultlply
funettons;
xl
lrlt
lffl
Dlvl-c
functloncr
rf
lrll
lftl
A tunctlon for dlvldc doublc;
rrfl llll ll
A
funetlon for dlvldc double;
lftl lfll ll
DltDor DIYD+;
tfrl lxll ll
A
funetlon for r.rt.lndcr
rarl lal, lf
cor rCcÈ Íon r
Dunctlons to parr btttor
llfl lrtt xr
through ALU;

ALU opcrctlon ls tddltlon;

xrrx tlxx xx
xrxr afxx IIror
rxxr tlot xx
rxxr rxtl IIrol
rxxr lall IX

ALU opcrotlon lr

ALU shtft

lctti

subtrectlon;

ALU 6R
ALU IS

IIXI ,Xlt llror
IIÍIX ltlt IX
ALU shÍft rlght;
onot.(ALU SL .oÍ. ALU SRt

0sr
o6n
0rs

IrIl IXXX Xt
ItIl IIII Xl
.not.(0 SL .oÍ. 0 Sn1

O rcAlrtcr ehlft lcft;
Q rcatcter shlf t rlgl,t;

A D.Í

llXl IXI7. XX
Xll- IIXI Xlror
Xllt IIXX llror

A condltlon uhlch lndlcatcs

2.2

thrt

thc ALU ls selccttng thc
output. Undcr thlc corËltlon,
dcfculÈB trc talcn for the
Shtft out end thc CARRï OUT L
slgnelr.
lary tl.r.nt3: Tlre Atf chlp has four D-typc fllp
flopc. IhGn cnablcdl loadlng of the fftp flops occurs
rÈ the rlslng cdgc cf tha QD CLi L clocl slgnal.
ALI(C): tfrc ALX<C> ls ugcd to arvc the carry/brrou
Íror ALU<31> cycry Èlrc en ADD,/SUB cparttlon ls
perforrod by thc ALU:
ALIrC 3f t
ALPGTL
ÀLr<C) Loaded vlth
LLIT L
rrDD
ADD

r
H

n
H

SIFLC
H
SI'B
I
ln eddltlonr oo a lulttPly oPcrttton, thc llf,<C> ls used
Èo styG the chlft out fror ÀLU<rO>. Undcr all othcr
condltlonsr ALf<C> ls not loadcd.
llrc ALI(C) cen i.c sourccd onto fBtts 3C H, sae 3.3. {.l.
ALUSO: llrc ALUSO ls ueed tc aayc the shÍft out btt fron
tha ÀLU on ayery ALU chlft opcratlon.

LLIT L
B

Rotttor

ALFCTI ASIO 3f L

ÀSIO Cg L

ÀLUSO loadcd

ALU SL
ALU SL
ALU SR
ALU SR

x
L

I
e
I

L
II
X
X

In addltlonr oh a Dtvtde oPeratlonr the shlft out fron
othcr condttlons,
not
loadcd.
ÀLUSO ls
llrc ÀLUSO can bc sourced onto ïBUS 3l H' s€ê.
ALU<31> ls saved ln ALUSO. Undcr all

lrOP ?lAG: tDlr flop Ír utcd to.ntcr.
hlttply or
Dtvldr loop. It lr lordod on cyory rlrlng cdgc of thc
OD CLT L.

LLIt t
L

I
r
I
I

ALFCIT

UX)P FIAG loadcd vlth

nrl ttPly
Dlv ldc

! Ittlllrrx
rll othcrt

I
I

LOOP ?IAG
o

TG ?l G: tlrlr Íl tp f lop lr .rcd by thc ALX ln thc

tultlply or Dlvlóo op.r.tlonr.
brlng r Dtvtdc oPGrttlonr voluc rclated to thc ALtrc 3r
L lnput lr loeded lnto thc ?m FlÁG flop. ttls ls uscd
to control thc oFcoDE I I outPut.
Durlng ! fultlply opcrttlon, vetuc rclatcd to thc QslO
aa t lnp,ut lr loaded lnto thc TOG PIAG f lop. Tttis is
urcd to control thc OFCODE I H ouÈPut.
TOG FIAG loaded rith
ALIrC 3f L
ALFCTL
QSIO 0a L
o
ll
x
tulÈlply
,
I
t
x
nrlrtPly
Dlv-HXO
Dlv-LXl
Dlv+hXl
Dlv+LXe
For ell other condÍtÍons, the sÈate of this flip flop ls
un-Pred lctable.

2.t

?la Errrty:

Pln

Itrr
ALFCï! <9sf) tl

LLII L
ROt (5:f)

CounÈ

TI
TI

El ectr leal

rrlout
lrlol,?

sElo t, t
PSLCf,
ALI'C 3I L
SË <l:t) H
D SIZE (l: f) H
SËE EI L
SffiEIL
SHL EX L
@CLTL
OFCOD3 (6: l, l:0 ) ll
uruBLE EX^AI.D
ECD L
CARRï OUT L
8TTE L

r/o

rlUt <31: 30> [
ASIO tt L
ASIO
L
3l L
slo "15
sro f? LL
slo

2.a

Scc Prrrgrrpà 2.a for Pin Functtons.

l)lottt
TIlOT,'T
lrlour
IIlOUT
tt/ow
II

6
2

I
I
I
I
I
I
I
I

2
2

IX
ouT
ouT

I
I
I
I
5
I
I
I
I

OUT

Itl

ouT

out
out
OUT
OUT

Trl stctc
Opcn C
Opcn C
Opon C
Opcn C
Opcn C
Opcn C

TtL
TTt
TtL
TTL
?tt
Ttt
?Tt
Ttt

lo9 icel
Act lvc lli
ActÍvc Ío
AcÈ lvc HÍ
ActÍvc llÍ
Àct lvc k,
ActÍvc :o
Àctlvc to
ActÍvc to
ActÍvc fo
Actlvc fo
Àct Ívc lll
ActÍvc l,o
Act lvc Ht
Actlvc lli
Acttvc to
Activc fo
Àct ivc [o
Actlvc to
Àct lvc lll
Actlve Hl
Actlvc Hl
Actlvc Lo
Àct lve to

Pln lïrnctlonr:
ALFCTL (9:C) H: À tcn btt ftcld troe the alcrouord to
control thc ALP end thc ALI( ln gcncral.
ïtÈh thc crceptlon of thc acrotch pad urÍte cnablc
3t9.-:::s (sPrr Ex L) and th€ BITE L slgnalr rll outputs
fror Èhc ALr cen bc effcctcd by thte flcld.
RO? <5:t) [: A slr blt ftctd uccd by thc ÀLK ehlp to
control CARRY OUT L, ASIO <31 ' 00> L, and QS Io
(3lrl5rt7.9a> L pÍnr.
LLIT L: ttlr lr . dccodcd tlgnal fror thc LIt field Ín
thc rlcrorord. Tlrc rlgnrl ls egecrtcd vhcn the LIT
flcld rpeetftcr t long lltcrel opcr.tlon. Asscrtlon of
thlc rlgnal vould hovc rpccÍal cffccts on the outputs
lnd thc fltp flops, rag.rdlccg of the other lnput
condltlonc. tftG8c trc srrcrlzcd bcloy:
OFCODE (6:lrl:0) ll utll bc forced Èo LHHLL, thts is used
to effceÈ a no shlft on the ALU and a no-oP on the 0 and
the D reglsters ln thc ALP chlPs.

ASIO <3lrtt>
to tr;

L, end QSIO <3l,l5.O7,Oa> L rill

DlrBt-E EXAP.II H ríll

be forced

bc forccd L;

tCD L vlll

bc Íorcéd H;
bc forced to L;
CÀRRï OUT L rill
Output to I8US <31:3f> ll vill bc forced to hi Ze
ttrc trc flopc ALIC tnd ALUSO vill rerain intact;
Tlrc Lfi)P FIAG flop uill be elcercd.
ttrc fG FIAG f lop rill be unprcdictablc;
Ttre BïTE L and thc sPïr Ex L slgnals.rc not.ffected.
ttrese .rc trc bt-directional pins to
IBIIS <31:30> ll:

mUS <31:'rr>.

input, slgnals on thc tuo pins are used as sources
^s
for ÀSlO <31,0e> L and QSIO <31,49> L.
output, the tuo plns.re used Èo sourcc Èhe internal
^s
ffip flops onto the ïBUS:
LLIT L

ALFCTL<9: e>

H
H

ll9ltlllxx
ll9lllltxx

rBus<31 >

HBUS<39 >

Htz

Hiz

ALUSO
o

ALTC
LOOP FTÀG

Hi 2
Htz
All othcrs
These
arc
ASrO <3lr0a> L. QSIO (3lrl5rt?t0'> L:
ALU
for
thc
and
the
bt-dlrcctional shift lnput/outPut
A
reglstcr ln thc ALP ehlps. T|te er.ct output signal fror
thcsc plns are defincd ln.
ASIO 3l L: Durtng .n ALU St oper.tion,
thls pin
ÀLU<31>
vhich is
receives the slgnal shlftcd out fror
saved in the ÀLUSO flop.
Durlng an ALU SR opcratlon, this pin supplies Èhe stgnal
to be shÍfted l:rto ALU<31>ASIO Ce L:
Durlng an ÀLU SR opcration, this pln
reccives Èhe signal shifted out frol ÀLU<00> yhich ls
saved ln the ALUSO flop.
Durtng an ALU SL opcretlon, this ptn supplies Èhe signal
to bc shÍfted lnÈo ÀLU<!C>.
QSIO 3l L: Durlng a O SL opcraÈlon, thls ptn receives
the slgnel shlfted out fror Q rcalster<3l).
r6

Durlng r Q SR oper.tlonr thlt pln cupplics thc signal to
bo rhlftrd lnto Q regÍttcr<3l>.

GIO tO L: D.=':-- e O SR opcratlon, thlc pln rccclves
the rlgnal rhlftcd out fror 0 roglstcr<re>.
Dtrlng A Q SL Opcratlon, thlr pin supplies the signal to

bc rhtftcd tnto Q rcglrtcr<tt>.

GIO 15 L and QSIO a? L: lhcse arc uscd only for Èhe
tultlply and Dlvldc op€retlons:
LLIT L

ll
H
H
Ë

ALFC?L

EIZE

G ro<l 5>

QSIO <57>

iulrtply
tul tt ply

Ll(bytcl
LH (uordl
tl(bytcl
Lll (rordl

pull up

pull up
lnput
pull up
outPut
pull up

Dlv ldc
Dlv Ídc

Pull uP
lnput
pull up

output

Undcr all othcr condltlons, Èhc tuo plns rill
Alco acc Teblc I for output deflnltlons.

CARRI OUt L:

a
a
a

be pulled high.

An output to thc c.rry lnput of the ALU.

Tlrc rlgnel outpul ls dcf lncd ln Tablcs VI and VII.

An lnput slgnal uscd as a source for Èhe
PSL C H:
crrrtf lnput and thc shtft lnput Èo the ALU.
ÀLtC 3f L: Ttte earry output froa ALU<31>. ls is saved
by thc ALK chtp evêry tirc the ÀLU perforos an ADD or
SllE opcratlon.
ln cddlÈlon, the signal is used dur tng a llul tipf y or a
Dlv ldc opcrat lon
lhls ls e tuo blt fteld to enable uriting
SPI <l:l) ll:
to thc scratch ptds.
Scc 3.3. l. ll
Ttese ar. tuo lnput slgnals fron the
D SIZE (l:3) H:
rlcro-scquencer to lndlcate the data slze in general:
Drta size
D SIZE (l:0) H
-

byÈe

II|

ro rd

quad

long

three
SPIíB Ell L. SFHï EN L. SFIL Ex L:
?hese are
outPut slgnals to enable the scratch Pàd vr i Èe
oPC r.t i ons.
tfhen asserted' SFXB El{ L allou a scr.teh pad location in
the bit position (17:CO> to bc vritten.
Ihcn assertcd, SFII EX L allov a scratch pad location in
thc blt Position <15:t7> to bc vrittcn.
Srcn.sscrtcd, SPIL Etl L allov a scratch ped l,ocation in
thc blt posltlon <31:16> to be vrittcn.
All three signals arc dcf ined by the SPr and the EIZE
lnputs:
'
ETZE

SHL

LH
LH
LH

H
H
H

LH
HX

xx
xx

HL
ltH

sffi
HH
HL
LL
LL
LL
LL

L
L
L

sËB

Functions perforred by Èhc ALP
OFCODE <6: rl, l:e ) H:
oPCoDE
chips .re controlled by a l0 bit signal, the
<9:C) H. Of these ten control slgnals, OFCODE (6: tl' l:C)
ll are output fror the ALR chiPs.
Norrally, the ALf ehip Passes ALPCTL (6: l, l:e> H
dlrectly to the ALP chips as OPCODE (6:l'l:9) H; under
cerÈàin condltions, Èhe ALR chip uould rc-cncode these
signals so th.t thc ÀLtr and thc ÀLPs together uould
achleve sole special functions.
BffE L: A signal decoded frol the D SIZE (l:C) inputs:
BYTE L
D SIZE (l:e )
LL

H
H

Thi s slgnal is used to enable slgn,/zero cxtcnd for the
ÀLP chl ps Ín tlr" <l 5: C7> bt t posl t ion.
BCD L:

An output signal froa the ÀLR lndicating that
tha ts perforling a BCD add or subtract.
LLIT L ÀLFCTL
BCD L
XXXXXXXXXX
L
H
H
XXXXOXoIXX
L
H
Others
H
DUBLE ENÀBLE H: Ttte pignal is asserted utren thc LOOP
FIAG is seÈ and that ÀLPCTL <9:0> H speciftes a rulttply

or a dlvlde opcratlon.

LL It
L

r
r

AIFCTL

ÍooP ?t G

DOIILE ETABLE II

tul Íert
a
L
hl Íert
I
tl
DlYfert
a
L
Dlvfert
I
tl
ell ctrc I
L
@ CLÍ L: ttrtt lr r clocl input. lhcn cneblcd, all
Íltp Ílopr lrC locdcd on tho rlelng cdge of thc clocl
I n;rrt .

LR T T D L D
uZ U U t O t
IT
L L Y O Y
T+TPD

o
T

a
s

0
s

o
o

AU,SO e

o
o

L
g

0
s

I
5

0
7

0
o

e
e
e

e
o
e

al
9X
9X
ax

xx xx rx xx rx
I

r I
I x
,r
I x
I X I X
gx
x I
xxlxlxo
0x x I
ax x x
ax x x
ax x x
0x x r
L

X a

r
x
x
X
x
r
I
I
I
x

a
I
I
I
I
I
x
x
x
x

r
x
x
X
x
x
x
x
x
I

x
x
X

x
5

I
I

x
o

o
a

e
a
o
e
e
e
e
o
o
o
o
o
o

I
I

x
x
x
x

x
x

g00eeo
oeaoAlu<eo>o
a90Alrr<oa>e0

o
0

ALU<00> e
e
0
L e
ALU<00> e(e
e
e
g
ÀLu<eo> e
ALIC 3tL
O
e
Al'ljc 3l L
ALUrO0) 0
e
ALuc3lL
c
e
0
Q<07> e
ALUC3IL
e
O
E
Q<15> o
ÀLlrc
9
e
o
3l L
0<31> 0
ALuc 3l
a Àurso
e
e
o
AU,C 3l

(.)

(.. )

(..)

OUTPUT

CONDTTIOTI

ALT Cf,ÀRT I

rolÀ?rots
ÀLUSO r ALUSO fltp flop
for Èhc
ALU<3C> . InpuÈ fror ASIO ga L
val ue3
Q(n) r lnput froe QSIO n L
Yal uat.
X r Don't care or lutually

Signal deflntions
shifr l/o pins. Àll

listed are loglcal
Signals are expressed in
logical values.

exluded condtlons.
(', - Scc AtI( Chart 2

(..) . See ALK Chart 3

ARAAÀRRR
LLLOOO
DDUUUT?T

z2
??x5sl32

SRL

txxxxxxx
xlxlxxxx
xxlxxxxx
aarlxJaa
aaxlxoal
aarlxalt
aaxlxall
a t. x
aoxlxlcl
9axlxlls
aoxlxlll
aaxxlrac
oaxxloal
aaxxlclc
oaxxlclr
ooxxllee
cexxllal
ooxxlllc
rteXXllll

BËII

ASIO 3l L

ASIO aa L

a
a
e

o
a
o
g

al
I

SEE ALT CHÀR? I
SEE ALT CIART
'
c

PSLCH

--=r

t
0
o
o
o

I
rBus 30 H
o
o
o
o
o
0

c
e

coxDrTrol{s

see irx

er
t

TBUS 30 H

PSt C ll

OUTPUTS

]IOIÀTIONS:

X . DOll 'T CÀRE OR iUIUALLI
EXCLUEDED COIIDITIOXS

R DeF - ROt (5:0) H . (39r{5r1i.59.61163)le

ALi CIIART 2
STGTIÀL DEFIXTIOTS FOR THE
ALU SHIFT I/O PIilS
THE CHART IS A COX?II|UATIOI|
FR(N ALT CHART I

c^^{,

SEE ALX C'|IE- I

AROOORRR
DDlISSTTT
zESRL
??r32

ooo
r

osto 3l L

r
t

a
I

II 1{-.
t

sEE clÀRt
8EÊ CflÀRT a

a
a

x
x

I
I

a
I

rBrrs 3tl|

I
I

'l'

SEE ÀLT CBART
sEÊ ÀLK:BÀRT

I
I

t
a

rB0s 3a rl

osto ar L

IIXTIXXT"
IIITTIXX!'

aallrraaaa'
aatlxatllt

a a || I
a a
I
I
aaxlrl
aallxttli.*la
a a r I
a a r I
aaxxlaaaaa
aalrlgaltl
. .
a a

T
x

X
t

aaxrllaatt
aaxxlltlaa
a r I
a
a a x x

PSLCI

coxDlTloNs

psl c rl

ou?PuTs

TOTATIONS:

I = DON'T CARE OR iUTUALLï
EXCLUDED COI{DTTIONS

R DeF . ROT (5:e) H a (39r15r17.59.61163)lg
ALT CUART 3
SIGXAL DEFIXITIOXS FOR THE
Q REGTSIER SHIFT r/O PrNS

THE CHART IS A
COTITIXTIATTOII FR T ALK CIIART I

RÀAA0o0

OILL

?uuusstl
25Stf
LRS
I

LRS
ASIO 3l L

.lxxIxx
alxxxlxoQ<at>
a l
x x x
axlxlxxQ<31>3
axlxxlxoo
axlxxxl
axxllxx
axllxlx
arxtxxl
llxxlxx
t I
x x x
llxxxxl
lxlxtrx
lxlxxlx
lxlxxxl
lxxllxx
lxxlxlx
lxxlxxl

ASIO Oa L

dclr>
c

Q<31 >
o
o

a
o
g

o
o
o
Q<31 >

0<31 >
0<00>
ALU<31 >
a
a

Q<t0>

ALU<OI>

ac
oa

COIIDTIONS

't
OUTPUTS

IOTATIOIIS:

I r DOllrT CARE OR iUTUAILI
EXCLUDED COXDITIO]IS.
Q(n) . IXPUT ?R(Ir QSIO (n) L
ALU(N) 3 IXPUT FRLá ASIO (n) L
ALT CIÀRT
' FOR THE
SIGIAL DEFIII?IOXS

ALU S||I?t tlO PrNS
THE TABLE IS A COIITTXI'.ATION
FR(N ALT CIÀRT 2

o
T
2

A
L
u

s
L

cl
cl

ox
cx
0-*
cx
ox
ex
II

uus

SN
RS

xx
xx
xx
lx
lx
lx
xl
xt
xl

xx
xx
xx
lx

ll
tl

lx
lx
lx
lx
lx
lx

AAO
LL

lx
lx
xl
xt
xl

srl

RS
QSIO 3l L

i-xxa.

xlxec
x
xl
I
xx
x
lx
x
xl
I
xx
x
lx
x
xl
lxx
xlx
xxl
lxx
xlx
xxI
lxx
xlx
x" x I

QSrO ee L

'o c

o
e

ALU<EE >
e
o

HBUS 3I H
c
e

líBus 3l H
o
e

ALU<3t >

ALU<31>

e
e

ÀLU<e0 >

ALU<e0>
c

e
e

Q<31 >
o
e

Q<31 >
e

COr|DITIONS

OUTPUTS

NOTATIONS:

X - DONrT CARE OR IIUTUALLY
EXCLUDED CONIyIIOXS.

Q(n) a IXPUT FROI SIO (n) L
ÀLU <n> ' IXPUT FROI ASfO (n) L
ALK CHÀRT 4
SIGT{AL DEFINITIONS FOR THE
Q REGISTER SIIIFT T/O PINS
THE CHART IS A CONTINUATION
FROIT ÀLK CHART 3

LRIITDD
LEUUII
IIILLVV
T++

o
o
P

DDP
IIA

vvs+s

ex
cx
ax
ex
cx
ox
ax
ax

0x
oc

xxx
xxx

xx
xx
xx
xx
xx

lxg
lxl
xle
xIl

xx
eo

xxx
xxx
xxx
IXI

xxx
oax

xx
xx
lx

F
L
A

lx
ol

xxxx
xxxo
xxxo
xxxo

xxxg

xxxo
xxxo
xxxe
lxxo
xlxO
xxLo
ecex

COXDITIOX

CÀRRY OUT L

lI
I

o
e

I
TG
ALK<C>

TET<s
e

SEE ALK CHART 6
OUTPUT

IOTATIONS:

X - DOI{ rT CARE OR trUTUALLI
E XCLUDED COIIDTTIOI{S.
TOG - TOG FÍAG FLIP FLOP.
ALf <C> . ALK<C> PLIP FLOD.

ALK CHART 5
STGNAL DEFITITIOIIS FOR THF
CARRT OUT L PIN
ALL VALUES LISTED ARE LOGICAL VALUES

LARARR
LDOO
TDDDTT
TEE
FFIS
L

lxxx
xx
tx
lx
xx

al
al

ax
ax
at
ao
ag
ce
g9
oo
oo
c9

xo
rl
l,
ll

oa
oo
to
aa
al
EI

al
al

CARRI OUf L

al
It

I
t
I
I

xx
xx
xx
xx
ao

TtRF

EI=cs

It
tt

a
ALtr<C>

ol
l0
tl

PSL<C>

CO]IDITIONS

OUTPUT

IIOTATIOI{S:

I r DOI'T CÀRE OR iUTUÀLLY
EXCLUDBD COilDItlOf,S.
ALf,<C> . tf,E ÀLf<C> FLIP FU)P.
PSL<C> . If,PUT ?R(n PSt C B

R IrgF ROt <5: C) H . (39,15, 17.39.611 631lO

ÀLT CTART 6
STGXAL DTFIXTTIOXS FOR THE
CARRï OUT L PIN
THE CIIÀRT IS A COXTTXUATIOX

FR(N ALT CIART 5
ÀLL YALUES ARE TOGICAL VALUES

LDDP
oltA

LRNiDD
LEUUIT
ITLLVV

ovvs

T++

PDDS
FS

L
A

lxi
et
cx
gx

cx
9X
ox
ex
5X
ex
ox
ex
ex
c0

I
I

x
x
x
x
x
x
x
x
x
c

xxxxxxx
xxxxxxx
xxx0xxx
xxxlxxx
lxxexxx
lxxlxxx
xlxexxx
xlrlxxx

(n) n
<6> <5> <4> <l> <c>
OFCODE

ct
ao
ll
le
ll

lo
lo
l0
le
lc
tc
lc

xxl9xxx
xxllxxx
xxxxlxx
xxxxxlx
xxxlxxt
aoaxcce

CONDITIOhS

130
el0
ell
e lllt l

orl
r lEl
leo
aocco
eec
TOGOg
109
e

OUTPUTS

NOTÀTIONS:
X . DOll rT CÀRE OR I|UTUALLY
EXCLUDTD COI{DITIO}IS

- OUTPUT SAIIE AS THE CORRESPOIIDING
ALPCTL (n) 8
AOG - TOG FlrG FLOP

ALI( CIIART 7
SIGXAL DEFINTTONS

FOR TllE OPCODE (n) H PINS

osto a7 L <-->rfl

t8t<--> osro 0o L

--->tt?
ROT 2 B --->t09

t2t---> oFcoDE c H
tlt<--- ALlrc 3l L
tot<--- ALFCTL I tl

ASIO 9a L <-->t02
a?t<--> mus 3l H
ASIO 3l L <-->rt3 ALK a6t<--> rBUS 39 H
AtFCtL H --->rOa
t5t<--> Qsro 15 L
ALFCTL I' H --->ta5
tat<--> oslo 3r L
ALFc?L 6 B --->tt6
t3t<--- Àgncrt 8 H
RO|D 3 Ë

ROt I n --->tOE

DOTDLE EXfgLE Ë <--- tl3 . o . . .. . 39 t---> 8CD L
PSL C H --->tll
.
. 3gt---- GRourD
YGA
LtD ]7
ALPefL
ltcc
ALFCTL
t 13
36 t

. t<------tl2 .
5ll
. lxrlt.
<--2H
---oFcolrt6H<---tll .
o35t----cRoltND
ROt t H --->tls .......
ortoDE 5 H <---tt6
ROt I n --->tl?

QD CLt L

--->tlE
ALFC?L 7 B --->t20
CARRI OUT t <---t2l
ALFC?L 9 H --->t22
oFcoDEa[<---t23
oFcoDE I H <---t2t
ROt 5 E --->rl9

3lt<--- ALFCTL 3 H

33r<--- rLtT L
32t<--- SH t H
3lt<--- D sIzE c H
3tt<--- SH H
29t---> SHB' EX H
28t---> SHL EX H
27t---> Sm Et{ n
26t<---DSTZEIH
25t---> BïTE t

ALT FIGURE I

PIN CONFIGURATIOtr DIAGRNI Àf,D PIN IDET{TIFTCATIOII

3.5

ARITNTTIC TPGICAL PR(rc?SSON (ALP-DC6ttl

GIIIRAL DESCRIFIIOI:

Ttrc ALP chlp pcrforas thc rajorlty of the data aanlpul,atlons Ín

erecutlng the racro lnstructlons. Eaeh chlp ts four blts uide and

contatns a eonvantlonal ALU, tuo D-type rcAlstere, shlft neÈuork8,
and 8CD-adjust clrcult.

AL? ?rblo I

?tn lóontlÍlcrtlon arÉ 6rtr ïyF
--------

tlIPIIIIPIIID

l2
l3

l5
f6

frt
lrt
lrr

lr5
lr6

ll7
lrt
l9
2a

2a
25
26
27
2a
129

f3,

Itt

132

tJ3

f3r

136
137
139

f|,

l.r

fr2

lr3
frr
lr5
1.6
lr7

lat

2r
f Et
I gn Et? DÀTA! r
lsllt

AL" OYIR?T.C II

GA?E ?TPD

I GAITT
I GAllCf,
GAl"rc
GAI!Ë

I
I

GATTIG
GAIT1IF

to. I thA

I
I

lOt . l2rA

GAlrrï

I GAIITG
I GAITDG
I GÀlÍzx
I GAITZT
I GAltzx
I GAltzx
I GÀltrcF
GÀITXG

GAtilG

GÀI"IIG

IOL . l2rA

GAlt|rc

GAIACX

GAITrc

I GAlfrc

I GAIïS
I GAITIG
I GÀTÏ|!G
I GAITrc
I GÀTNF

I GAlrxG

rE aL
TB3L
i8 2L
tE. L
ialtll Ex L
RBIL
R8 2L
RB3L

I GAIilF
I GAITXF
I GÀITXF
I GAITXF
I GAllrc
I GAITIIF
I GAITXF

lOf . l2rA

QR SNT DÀTA3 L

sBtI
s8aË
sB5[
snt Pos tf L
sB3ll
sB6[

GÀITTIP

GÀTlEI
GAI?ilG
GAIIIIG
I GAITIG

I GÀIITIG
I GAlTlfc
I GÀITIIG
I GÀttllc
I GÀITI|H

I
I

I oFcoDE 2 t
I oFcoDl | f,
I OFCODC B
I oFcoDG 3' f,
I nur zERo f,
I oFcoDt 6 x
I oFcoDt t n
I oFcoDE I U
I TB EXIEID EX L
I oFcoDE 8 X
oFcoDt ? Ë
ralL
oFcoDE 9 [

I tr?

euu srf n?A, L

Ito.'

I Aru 6[? u?At L
I CROUP PROPAGA?G L
ln3l|
lFlr
ra 2n
Ftn

DATÀ

. l2rA

foocrrL
GROUP G?TIRA?E L
c^nnt tr L

sf,F FOS tl

I cmtlTs

2.1

?rrlorracr leqrt rerntr r
Drtr Fortr: llrrco lngut porta rnd onc output port rre
proy tdcd for lntorÍrc ln9 rl th othcr ccponcntr ln thc
cPrr.

2.2

fie t-port lr urcd to .cccpt dete frc thc iBUS. tfre
t-port lr urcd to .ecGpt d.tr f rot thc R8lrS. Det.
.Pp..rln9 on both burer .r. rctlye lov. Intcrn.l l.tchc3
ar. provld.d to l.tch thr dttr.
fia S-Port lr urcd to aecopt dttr fon tho SOUS. Deta
tpgorrlng on thtr bur .r. .ctlyo high. lrnllkc thc i8lrs
rrÉ the REu6, no lnt.rnal lrtchce .r. proytdcd to lrtch
the drte.
llre l-port lc uced Èo rcnd datc to thc IBlrS. Drta
tPPcrrlng on thtr bur erc .ctÍye lll .
CL(rcIS: lUo cloel clgnals rrc uscd by thc ALP chip:
! o TATCH EX L
b. 0o cLr L.

2.t

lfre TAACH Ex L lc uecd to latch data fror thc t end R
BUS... Ih.n lAICll Ex L lr rt.lov
lcvcl, lnput date ls
fod through thr lntcrncl latch. AÈ thc rlslng cdge of
tAtCB EX L, lnput drto lr rcteÍncd untll lAtlCll EN L gocs
lou rgeln. Inputs thtt .r. letchcd lnclude lB <3:0) L'
RB <3:t) L. end EFf DATA L. ltrc QD CLI t ls uscd to
lord thc is lnÈcrncl rcglrtcrr (Èhc Q and D r,eglstcrs.l.
ïtrrn cnebled, dcte ls loedcd .t thc rlslng cdgc of thc
clock.
trJor Corlnncntr: Itrcre ere tcn lajor scctlons to the

ALP loglc:

l.
Input latchcs
2. S-Shtfter
3. ALU lnput rur
I. ALU
5. 8CD adjurt
6. Output rur
7. Q-R.3lstcr
8. D-Rcglrtcr
9. Function control
It. Strtur loglc
Hlth thc creeptlon of thc S-Shlfter' the control of all
BGctlonr tre decodcd out of a le blt slgnal ' 'oPcoDE
(9:3) H'. l}2a posslblc functlons are shorn ln the ALP
C?L FUICTION CEART (Thls chart ls Prcvided in Èhe DPfr
schcretle Packag€.1.

lnFrt lrtchcs:
Drta eorlng Íror the REI,S end thc iaUS
.rc ccplcrcntcd rnd lrtchcd ln the ALP chlp usÍng thc
'l^tlcl EI L' rlgnel. Fcod throngh lttchcs .re uscd so
thrt detr c.n bc opcr.tCrd on rt thc s-e tlre thcy.rc
bctng l.tehcd.
l|rc S-shittcr ls e corbinatorial shlfter
S-Shiftcr:
capeblc oÍ rlght shtfting thc S-port by a, l, 2. 3 bits.
tlrc nrrbcr of blts Èo bc shlfted is spccif lcd as t ÈF
bÍt nrrbcrr SllP FOS (!l:lt)
L:
slrlFt tuE s-PoRf Br
SllF FOS <l:t) L
oaaaa aaaaaaaa aaaaaa aaa aaaaaaaaaaa aaaaaaaa r ataaaaaaaa

trtr

lrL
LI
LL

a blt
I btt rlghÈ
2 blts rlght
3 btts right

aaaaaaaaaaaaaaaaaaaata aaaaataaaaataaaaiaaaartroaaltla

ALU IXPUT iUI:

ttrc À and B tnputs to thc ÀLU arc
Ttrc
controllcd by the A-rur end 8-lur rcspcctlvcly.
control for both lur's rrc decodod out of the OFCODE
<9:f) ll and thc tB cxtend EX L inputs.
ALU:
the ALU pcrforls three blnary arlthrctic
oparrtlons, tuo querl-BCD arithretie opcrrtions, and
f ivc logtcal opcrttlons.
Itrc Èhrcc blnary arlthrctle opcratlons rrGs
À plus B plus Cln (A + B + Cin)
A plus .not.B plus Cln (f - I
.X(m.Clnl
B plus .not.A plus Cln (B - A - .llOT.Cln)
In thls rode, tuo c.rry look ahead slgnals (P and G) are
calcul.;tcd brsed on 16.
Tfre Èuo quasl-BCD artthrcttc opcrettons .re:
À plus B plus Cln (À + B + Cin, BCD)
A plus .not.B plus cln (À - B .IloT.Cln, BCD)
In thls nodcr thc cJtput of thc ALU is thc sare as doing
btnary arlthretlc,
but thG P and G slgnals are
calculated based on ll. Ertra loglc ls used to adjust
the I btt ÀLU output Èo r Èruc BCD rcsult.
The f lve loglcal opêrattons àrc:
À. ÀND. B
A. OR. B
À. ANDNOT. B
B.ÀIIDNOT. A
A. XOR. B

8CD MJusÈ:

ïlrcn thc ALP opcode spccifies a BCD
oPcrttlonr thc ouÈput of Èhc ALU rry be adjusted to r
lcgal BCD dtgtt eccordlng to the follorlng rules:
For A plua B pluc Cln (ÀddtÍf the truc sul ls tcn(It) or grcater
thcn BCD AdJust

else 8CD MJust <- ÀLU outputt
For A pl,us .not.B plus Cln (Subtract) tf thc truc dlftcrcnee lt lcss than zero (Cl
then 8CD AdJust
elsc BCD Ad just <- ALU ouÈput
OU?PUT llUX (tf{UX}:
Deta corlng out of Èhe ALP chip is
conÈrollcd by tí-tUI. thcrc are flve sources to this nux:

!. BCD adjust
b. ALU output
c. ÀLU shlftcd left
d. ÀLU shlfÈed rlght
€. B{UX output.
The BCD adjust ls selccted for a BCD arithnettc
opcrttlon. Each 4 blt ALU output ls adjusted to fall
rlthln thc rangc of 0 through 9. (See descrlption on BCD
adJuet logtc).
lhcn ÀLU ghttt left lr sclectcd, data to be shlfted lnto
thc lcagt slgnlftcant blt appcars at the ÀLU SHF DA?Ao t
pln, and ALU.<3> vlll be shlftcd out Èo the ALU SHF
DATA3 L pln.
tÍhcn ÀLU shtft rlght ts selected, shlft in and shift out
data ulll eppear aÈ thc ÀLu sHF DATÀ3 L and the ÀLu sHF
m?AC L plna, rcspcctlvcly.
lÍrcn thc B-'iUX le selectcdr the ÀLU funcÈlon is stlll
deflned by OFCODE (5:2) H, even though lÈs output cennot
bc rcrd by any logtc. (But all st.tua sÍgnals can be.)
Q-REGIStER: ttre Q-RÊllstcr ls a I btt D-type regtstêr.
Sourccr to thc Q-rcglcter trc elthcr fron the A{IUX or
thc f-flUl ouÈputs. tn addltlon, thc Q-rcgtster can be
ehlftcd lcft or rtght by I blt.
(Ir
r shlÍt lcft, the chlft-ln to the lcast slgnifÍeant
btt lc auppllad by thc 0R SHF mtAO L Pln, and the aost
slgnlflcant blt shlftcd out Èo thc QR SHF DATA3 L pln.
qt r rhlfÈ rlght, thc rhltt-ln and Èhc ghift-out appears
ar rhc 0R sllF tnTA3 L and the QR sHF DÀTA0 L plns
rGsPeCtlVCl t/.

D-Rcglstcr: thc D-RcAlstcr ls a I blt D-type register
uscd Èo hold the lnterlcdlatc results of the ÀLU. Source
Èo the D-rcalster ls frol the ll'{UX outPut only.
63

All ALP slices rceeive . lO bit
I total of lo2a functions are
posstble, these are tabulated in the ÀLP function (see
DPt scher.tlc packagel. tn the ALP functlon Chart'
therc arc 16 ra jor col rrns. Each c-.1tln is identi f ied
by oFeODE (9:6) H' vhlch sPecifles the'À and B inputs to
the ALU. ftcre tre also 16 lajor rous. Each rou is
identtfled by OFCODE <5:2) ll, vhlch sPeclfles the ALU
and H-ilUX operatlon. At the interscction of a ra jor
colurn and a rajor rou' there àre four blocks rhich are
idcntÍfied by OFCODE (l:e) H. Each bloek sPccifies àn
operation on the 0 and D reglsters vith the given ALU
lnputs and the ALU oPeration.
The folloulng notations are used in the chart:
: Data accepted froa !{EUS-:
It
R
: Data accepted fron RBUS;
uhich :s ysocrated by
n : Extended llBuS data,
replicatlng data accepted fron the EXT DÀTA L
pln.
n ls selected by the À-nUX if (OPCODE <9:6) H 5, 6t or 7l and (llB EXTEND Ell L G L). If ËB
EffEND EN L is at à high level, À+{UX uould
select ltl insteadt
: S-shlfter outPut;
s
A
: A-ilUX;
: 8-tUX;
B
lfx :
{UX;
ct : Carry lnputr (data on the CARRï IN L Pin);
D
: D-RegisÈer;
: Q-RcA lstcr t
o
D-RegtsÈer shltÈed left Èhrough the ALU;
DSL :
D-Reglster shifted rlght through the ALU;
DSR :
SQL :
Q-Reglster shlfted left;
SQR :
Q-RÊllster shÍfted rtght;
Zcro shlfÈed rtght through Èhe ALU;
0sR :
Ercept when OFCODE (9r 7:5) H ! HLHH, data selected by
are also outPut to thc l|B (3:C) H llns. l{hen
the W-flUX
(9,
7:5> H - HLHHr the HB (3:e> H plns are turned
OPCODE
off.
STATUS LOGIC: Trro status slgnals are avallable for
condltlon code prtlttivc or alcro branchcs.
The 'lfluX ZERO H' slgnal lnd tcaÈe s yhethcr the H-ilUX
output ts all zero. Thls slgnal ls valtd even though
output to thc TJBUS I s d I cabl ed .
The 'ALU OYERFLOï H' stgnal lndÍcates àn overflou
eondltlon dctectcd by thc ALP sltces:
FIIICTION CON?ROL:

oFCoDE (9:e> H inputs.

For blnary arlthrctlc opcratlons-

2.tl

oycrflor <-- thc crcluglvc OR of thc carry-ln and
thc carry-out of thc lost signtfleant blt.
tor loglcal operatlonrovcrflor <-- 0
For BCD arlthretlc opcrattonsoyêrflor <-- 0
Pln ldcntlflcatlons, Pln Count and DescrlpÈlons: Per

ALP Table 2.

2.3

Truth Tablc for 'Group Proprgate Lr (A + I + Cl, BCD):

2.6

Truth Table for 'Group Generate L' (A + B + Cl, BCD):
Per ALP table {.

2.7

ALP t'unctií:.rs: See DPÍ,| Scheoatlc Pachage.

Per ALP Tablc 3.

ÀLP TABLE 2

PIX DI?IIITIOS

Xalc

PÍn

Descrlptton

.....i...............!3ï11...................r..................r

l|B <3:C) L
RB <3:C) L

sB (6:c) H

sHF pG <Ct: OC> L

|
{
7

Àcceptr lnput data froar thc i-BUS.

Acccpts lnput data fron the R-BUS.

Àcccptr input data fron the Rotator
output. Four plns are for data
and the rcletnlng three for shifÈ-ln

'
2

Ï"rnrua ptns to control rhe nrnber
of btts the SBUS input ls to be
shl ftcd.

SHF PtOS<l: e >

Nuaber of Bi Ès to Be

HH
HL
LH
LL

O bltsrlght

Shlfted

EXT-DATA L

lfB EXTET{D Ell L

tAtlCH EX L

lbltsrlghÈ
2blterÍght
3bltgrlght
Thc date lnput for elgn/zero crtcnslon
of Èhc iBUS.
UsGd to enable alga/zcro crtcnd of Èhe
iBUS lnput. Íhcn thlr elgnel Ís
rs3crtcd, and that thc ALP opcodc plns
speclflcs a zcro/slgn crtend
op.rrtlon, thc Eff DÀTA letch uould be
eolcetcd to Èhe A lca of thc ALu.
A rlgnal used to latch datt on the f,

QD CLf L

A clock sÍgnal uscd to cdgc trlgger

OFCODE

(9:0) H

and R 8USes.

thcQendDrcalgtcrg.
Tcn lnput plna to control all ALP
co.poncnts crccPt thc S-Shlftcr. Sec
ALP C?L functton chert (DPl schc.otle
paclegcl .

?tn

rLt tft.3 2 íGm.l
ttt [?trlttcs

CoLC
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaoaaaaaaaaaaaaaaaaa.a.a.aa.aa.aaa.
I! (3:r> [
Ured to rcnd drta to the I-8US. ltcsc

GNOUP PROPAGA?T L

GROUP GEIERA?E L

four plnr crn bc srltchcd to a hl
hpedrrco 3t.tc by e rpccitlc ret of
opcode ccbtnrtlonr lndlceted ln thc
ALP furrctton trblc.
fie group e.rry ProPtgttc output used
for crrry tool chcod.
ALU opcr.tlon
Stgnel ls acsertcd if
BlnrrySubtrect Art
DCD Subtr.ct
A.B
Dlnrry Add
A+8rf(hcrl
BCD Add
Sec ALP Tablc 3
tog lcrl f unctlons Xo uscf ul dcf lnltlon.
tàe group eerry gcner.te output uscd for
ctrrt/ looh ehctd.
ALU operrÈton
Slgnal ls asscrted if
Blnrry SubtracÈ (A-81 À > B
A>B
BCDSubtroct
Blnory Subtract (8-A) B > À

À+B>F(hcrl
Scc ALP Tablc a
1{o
uscful dcflnltÍon.
togtcel functlong
ttrlr pln lndlcatcs rhcther thc outPut
lur tr e ll roro. Itls slgnal ls val td
cyGn though the ALU outPut ls Èurncd
oÍf.
An output pln lndlcattng tn ovcrflov
eond I tlon.
Carry lnput for blnary rnd BCD
ar I thretlc.
Or r rhlft left, Èhle pln accePts drÈa
to bc ehlftcd tnÈo ALU<O>. on r shlft
rlghÈ, thls pln tranBrlt6 the data
shlftcd out of ALU<o>.
Blnery Àdd

ECD rdd

rux zERo H

ALU OYERILO' I
q

CARRT tX L

ALU SBF DATA' L

ALP ?llL3 2 (Gont. I

?tr D3?trt?ICs

?ln

Court

Ducrlptton

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaoaaaaaaaaa aaalaaaaaaaaaaaaaaaa
(rr c shlft rlght, thls pln accGpts
ALU StrP DAtrr 3 L
I

S SË? DA?A' L

0n Strt DA"A3 L

detc to bc shlfted tnto ALU<3>. on a
ghlft lcft, thlr pln carrlce thc data
rhlfÈcd out of thc ALU(3).
(h a shltt lcÍt, thlr ptn acccpts dete
to bc ehlfted lnto Q(C). On a shlft
rlght, thlr ptn crrrlcg data ehlfted
out of the Q<t>.
On e ghlft rlght, thls pÍn .cccpts
data
bc shlftcd tnto'Q<3>. on a
ghift tolcft,
thls ptn carrlcs data
shtftcd out of Q<3>.

ÀLP TTILB 3

truÈb Tablc for TGROUP PROPAGÀIE L' ( A + I + Ci, BCDI

\l
\l
\8. lf
f,r\ I

I 2 3 a 5 6 7 E 9lCll1213r{15

LH L H L H L
T- \ EII UB HË HH HII ËU HII IIII HL AL
H L H L

2
3

5
7
8
9

lf
ll

t2
t3

E tI H II II U II L H LII
tr E II H H B L I L IIL
I B Ë U II II L II L II LH
L H L EL
I E B H II L I
H L E LI
H
L
H..L
tr
tI
I
B
L
H L IIL
II
L
L
U
IU
L
H
L H LII
L
II
L
II
E
I
L HL
L
II
H
L
I
L
B
L
I
L
II
L
II LII
L
II
Ë
L
H
I
L
II
L
HL
L
H
L
H
tr
L
I
I tr L II L II L N L H LII
TI t II L II L ËL
IL B t
L B t H L H LH
H
L
N
I
L II L II L HL
L
B
B
L
I

L II L H L
H L H L H
L H t H L
II L II L H
t II L H L
II L II L H
L H L H L
H L H L H
L II L H L
H L II L H
L II L H L
II L H L H
L H L H L
II L H L H

AtP IAILI I

Trutt Tablc for 'GROUP GEXERATE Lr ( À + B + Ci, BCD)

\l
\l
\B-lC L 2
À.\ |
\l
\l
g
I
2
3

6
7
E

l2
l3

) 4 5 6 7 E g le Ilt2

IË H II Ë II H B TI H HL
ITI H H H II H H H t LL
IH II II H II H II L L LL
III H H H H H L L t L L
IA H H H H L L L L LL
IH H H H L L L L L L L
IH II H L L L L L L L L
ITT II L L L L L L L tL
IH L L L L L L L L L L
IU L L L L t L L L L L
IT. L L L L L L L L L L
IL t L L H H L L L L L
IT. L L L H L L L L L L
IT. L L L L L L L L L L
IT. L L, L L L L L L L L
ITT H H H H H II H H LL

L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L

13rl15

L L
L L
L L
L L
H' II
H L
L L
L L
L L
L L
t L
L L
L L
L L
L L
L L

L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L

8!2t--->trl
att<--- IIT HIA L
l?t<--- st? Fos tl L
tt t I --->ttl ALP t6t(--- sr6f,
lSt(--- s!tr
O ClI t ---)lfl
GnouP c3rttltt t <---tr5
aat(--- ST?FG"L
l3t<--- sl 5x
crtrr tr t --->tt6
ALU OYTI?LC T <---t'7
t2 t <--- sslE
G 3i? ntAt t <-->trz

tl t<--- SE'B

AU' EE Htr3 t <-->tr8

Gnoo? ?nofrcAtc L <---tt9

aa t <-->

0n str? mtA3

I! 3 t (---tlf .... o.. t9t<--- REtL
nl[(---ltl.
. tt t---- GnolxD
rcA ----tl2 . LID . !?t<--- R8 2L
ucc ----tl3 . D(UI. t6 t <--- RIIL

rt2s <---tla.

II'T
ALU Sf,l UtAt t <-->tl6
otrcoDC 2 a --->tl?
oEcoDS a I --->rlt
oFco[ 5 I --->rl9
oDcctDS 3 I --->tza
nur stno r <---t2l

i --->t22
[ --->t23
I ! --->t2a

35t---- GROITD
!t t <--- latt[ Bx L
t! t<--- mrr
t2 t <--- n 2L
3t t<--- r!3L
ta t <--- ntL
29t<--- oDcoDC 9 rl
2t t <--- IlL

27r<--- OFCODG ? U
26 t <--- oFcoDG t rl
25t<--- IB TIIEXD EX

oFcoDË 6
oFcoDC a
oFcoDC

AI.P ?IGURE I

Prx cor?lcunAtld DTAGRII AID PIX IDTXTI?ICA?IOT
ís3r PltRÀ. 2. a (AtP tAEl.t 2I FN PIX DC?NI?IOS AID DESCRIPt TOXS)

cÀctrE ADmES8 CilTROL CrIp (CÀI-DC627'

3.6

GBIBRAL DIECRIPUOI:

Thc cÀf, ghtp g-cncreÈcs lost of the slgnals nccessrry to
control Èhc cache and contalns the statu-s/control
rGglótcrs
aaaoclatcd ulth thc cache.
CAI TASLI I

Pln ldrntlftcetlon tnd Getr 1ypc

lPIx | | Plx'ID
a2

ls
l6

i cqrerm

I mus 27 tr
IBCLKL
I rBus 26
IHITIH
lmus25H

ll
l5
l6
l7
l8
l9

l2e

l2r

422
123
124

CACHE VALID I

I
I
I
I

It
ÍTffiFF-_i
GAITZF
I
I GÀI?I{F
I GÀtfizF

I CACHE IXT L
I HBUS 2a H
IHITEH

I cAtE ttpB

GAITCF
GAIT:ZF

GAITIN

IoL ! 2erl.l
H

slrÀPsHoT crt L
DATA PAR ERR L
TAG O PAR ERR H
TÀG I PAR ERR H
CACIIE GRP I TíR H
CACBE GRP 9 WR H
ENA EYTE O L
CACIIE VALID O H
EilA ETTE 3 L
ENA BïTE I L
ETA BYfE 2 L

GAITZF
GAITCF

GÀITtl|

I GAlrNF
I GAITNF
I GAITNF
GAITNF

GATTTN
GÀITTN

GAITTN

GÀlrril

GAITTN

GAlrrï{

GÀITTN
GAITNF

t+rux sEL sl H

I
a

CÀI TÀElt I (Cont,

Pln ldentlftcatton rlÉ Grtc tyPe

lPrr | | prr ID

I carlrïs

I DUS ROt Sl H
127
128
129

13.

l3r

132
133

l3r

136
137
139

lrr
lrr
1.2

lr3

lrr

lrs
1.6
II7

la8

I GA'B TÏPI
GAITTII

IO ÀDMESS L

GÀ: TXF

T CLT EXASLE B

GAITf,F
GAITXF

PRD?EIICU L
STATUS YALID L

GAITTIF
GATTIIF
GAITXP

DSIZEIH
D SIZE TI
DST RIODE
' II

GAITXF

D CLT EXÀEtE H
TÁTTËED TCTRL 5 H
TA1CËED ïrcTRL I H
LA1CBED TCTRL 3 H
IATCBED BUS 3 H
Í.AITTED BIIS { H
TATCBED BUS 2 H
LAITAED BI'S'' H
TAIIEBED BUS I H
LATCTED TCTRL 2 H
I 4IEBgD TCTRL { H
I T.ATCEED HCTRL C H
I DOUS ROr Sr H

GAIIXF
GAIIIIF
GAIT]IF
GAITIIF
GAI?XF
GAITI|F
GAITTIF

GAITXF
GAI"NF
GAITIIF
GÀITXF
GAITIIF
I

GÀITTï

Perforrancls

2.1

CAI I,/O PIIS rhall bc rs speclflcd hcrcln.
IIPUTS

f Prlls

BCLIL
D CLI EIAELE E
D SIZB (l:t) E

I
I

LET RNODE Ë

I
I

DhTÀ DAR ERR L

ro ÀDnBss r
talt[BD rcIRL (5:0) tl

5
6

PRE?BITA L
SIAPSBOT CTI L
SIÀTI'S YELID L
TÀG (l:l)
PAR EnR n

IÀICBED BtfS (l:0) tl

r el't(tl:tt>
Bxà3t.E B
rAD
B
nux sBr sl u

I
2
I
I
I
I

BI-DIRDCIIOilAL LIXES (tnI-StATE UTtESS OTIErISE XOTED)

trIT (l:3) Ë
BUS <27221> E

2 (OPBr-COLL.l

ot Tpu?s (toTEr FotE LilLEss olHEmrsE xoTED)
CACTE TIt t
CÀCAE GRP <l:f) IR tr
CÀCBB YILTD (I:I) E

I
2
2

DBiS ROt S<l:t) [
Ef,A Bll? (3:!) L

2
a

2.2

Tbe follorlng

ls a llgt of thc code assÍgtrcnts for the
ftcld:

BlrS FlrNCTlOll llcro

REÀD PHïSICAt ÀDDRESS

2.
3.
I.
5.
6.
7.
8.
9.
À.

READ, lfo ËICRO-ÍR^P

mocEsson rxtTIALlzE

Í/O IXITIALTZE

REÀD LOCf, IIT8OUT TESI
XOP

READ, SECOXD REF8RETC!

NOP

TRITE PtrïSICAt ADDRESS
REI CHECi

IíRITE, SECOXD RE?ER8XC

B. rRttt t rL(rr, sE(trtD REFERETCE
e. WRITE, XO HICRO-IRÀP

D. XOP
E. IRITe lI)XflORD, XO i rCRO-TR^P
F. BUS GRAXI
I'. READ
II. READ LO!|GH(nD
12. PtE ACCESS CIDCi, ïRITE
13. READ LOCI
I'. READ TITH TODI?T IXTEXT
I5. READ LOXGTORD TITË TODIFY IIITENT
16. Ftt AccEss cf,Ecr, REÀD
l?. PtE ACCESS C8!CI, READ, rERrrEL ]íODE

18. IíRITE
I9. TRTTB LOT(TORD
IA. WRITE IF XOT RIODE
18. rRtTE UNLCr
tc. PR(DE ACCESS, WRITE, IíODE SPECIFTED
lD. PROBE ACCESS, ÍRITE
READ, iODE SPECIFTED
tE. PRGI
lF. PROBE ^CCESS,
ACCISS, nEtD
8ug Rrnctlont erc dccodcd lroa 'IÀI\CHED BUS (l:e) H.
t

2.3

tte follorÍng lg r lltt of thc codc assÍgrracnts for the
uppcr half of Èhc ïCTRL tlcro flcld:
2C. vA
FC
2L. vA <- YÀ S VE + (reUS
22. Yr<-YA+l
'
23. tm
21. Fc
23. VA
26. rBus <- rDR
27. tm
28. T8 DÀTA
29. ta vtLrD 8IT <- a
vt

2^. rm

28. tm
2C. FC

2D. CACHE YTLID BIT <- O
28.

2?.
3C.
31.

32.

33.
31.
35.

37.

38.
39.
3A.

38.
3C.
3D.

38.
3F.

rDR

tm <- osR, zERo EXTEIDED

STAIUS./COXTROL REGISTER <- ïBUS (27 224)
PREVTOUS iODE RtcIStER <- WBUS<23:22)
EUS <27221) <- S?ATUS/COITROL REGISTER
BUS GRAIIT
STATUS./COXTROI ADDRESS REGISTER <- WBUS<27 z 24>
IS,/CURRIXT iODE REGISTER <- WBUS<26221)

REI CAECT
ASTLW RBGIS?8R <- IBUS<26221>
(RESERYED

ÍBUS<26221)
' (- ÀS'I'LVL REGISTER

(RESEnYTD'
SIGBEST SOF1ïARE IPR REGISTER <- ïBUS<2O: 16)
IPL REGISIER <- ïBUS<2CIL6>.
xoP

ïBUS<2r: 16)

ïCTRL Functlonc tra decoded frol 'IA$CHED WCTRL (5:3) H'

2.4

lnternal

Dafinitlonss
.'8lls Ct! DEC ll' ls TRUE for .ny of the fc:loulng Bus
SÍ9na I

Punctlon Dccodog:

READ PIIYSICAL ADDRESS
REÀD, XO r!CRO-TnÀP

READ L() T TTTEOUT TEST
REÀD, SECOTD REttRgl€E

rRttt Purs lcAL AunEss

rRrTE, SICOXD REIERErcE
rntTE tllLoctr, sEcol{D REFEREI|CE
TRITE, XO TICRO-TRÀP I
rRrTE UtrfrmD, lfo ircRo-tRÀP
BUS GRAIIT
READ

READ LONGHMD
READ L(TT

READ TITH TODIFT INTENT
READ LONGTORD IíTTH TIODIFY II|TEXT

rRITE

ïRITE LOXG]ïORD
ïRTTE I'NLCK

.DST RTODE LT S WRITE TF NOT R}IODE

r'BUS GRÀXT DEC H' ls TRUE for: (Bus Functlon Decodc)
8US GRÀNT

..PROC INIT H. Is TRUE Tf:
'PHASE I

L' t PROCESSOR IN:TIÀLIZE (Bus Functton Decodc)
.'PÀR ERR e H' ls thc HIGH TRUE output of . latch yhlch ls

enablcd durlng:

.ADD REG ENÀ H'
!ÁTCH Input ls:

.TAG O PAR ERR H'

.'DATA PERR H' ls thc HIGH TRUE output of a latch ytrÍch ts
enabled durlng:
.ADD REG ENA HT
I.àTCH Input ls:

.DATA PAR ERR HI

llrr I Hr ts Èhc HrGH TRUE ouÈput of a latch rtrtch
"Íarc[ED
Ís enablcd durlng:
.ADD REG ENA H'
76

IlltB lnput lr:
'llll I Br
.'lAlcf,lD f,lt I ll. 13 thG Ntcl| IRUE output of r lrtch rhtch
13 lnrbl.d durtng:
.ADD REG EIÀ II'

Itlcl Input 1..
.Ilt a H.
!ÀTCHED iÀ ,l

tr' l. thc XIG IRUE outpqt of r làrch eàlch
lr ln.bl€d durlng:
.ADD REG EXÀ II'

lÀTCf, lnput ls:

'tíÀD ,l B'
.'IÀTCI|ED ttÀ tl f,' lr tha ntcr TRUE ourput oÍ !
lr .n.bl.d durlng !

lrtch rhich

.ÀDD REG EXÀ II'

lAltf, lnput 13

.iAD aa tr.

.'SlzE I H' 13 th. NIGH IAUE output of r lrtch rhlch ls
anrblcd durlngs
'SIZE I TCII ExÀ ll'
lÀrcH hput lr:
.D SIZE I ll'
.'SIZE , l|' 13 thr f,IGE lnUE output ol ! lrtch uhlch lB
cnlbl.d du3lng:
-stt8 rlltr 8rÀ f,lÀTc8 lnput 13:
'D SllE t ll'
i.SIIE ll|lcl EIA f' l. fiUE lt:
.ADO R8G EfÀ i. 3 .PREFIITI DGL L. i
urttt + rtt?t 1(x(tonD + rRtt8 rrrl(Et +
nl?l Il Xt,l ODe (Bu. ll|nctlon D.coda3l I
77

..EIA CAciE Í:nR r. 13 IRUE if:

e 'REsEl ÀDD ErA tl' i
'ÀD nEG ErÀ B'X.
+ ('D CLi 8XÀILE lt' 3 'BUS GnÀXT DEC
Í.PREIEIC|| EL
L.tl
i.RESEI ÀDD EIÀ i' lr IRUE lÍ!
.PREFEICX CIC H'+'i
CLi EIÀALE U'
r'S?EEn TÀG 8RR a' t' IRUE lf:
IRR r' 6
'Ert cAcllE
pÀt
EnR X. +
I
Í.TÀG
(.pÀn fnn I B. s .ttl? t 11. r .READ tt., +
('l IE||ED llrr I E' ó 't lctrED ||lr a r'rl
.'SIEER Dt?A ERR H' lt mUE lf!
.EXA CÀCI|E gRn N' t 'DÀl^ PERR X' 3
.nIT t t|. t .nEAD t|.
.,
r.ExÀ t sT REP 8' ts tnuE lf!
.Ef,À CACIIE 8RR II' I 'PREFEICH DEL LT
r'RESel IAG EiR tr' t3 mul I f t
.TAG ERROT L' I
'B CLT L'
>>IOfE! 'RESEI tAG ERR X' do"3 *Ot 'Glttch' IRUE rft.r thÊ
Rtslrc rdga of 'l CLi L' I||tch li crurlng thc '?AG EnROn X'
Rlgtatcr btt to bccorc t.t.
.'RESET D lÀ ERR I' lr lRug lf:
'DÀTÀ ERnOR L' r 'B CLt L'
>>IO|!E! 'RESET D TÀ ERR f,' doca l|OT 'Glltch' IRUE .Ítcr thc
Rrslrc cdgc of'B cl.i L' rhlch la cru3lng rh. 'DA?À ERR(n n'
R.gtsta! blt to bccore rct.
r'ExÀ mus l' 13 IRUE lf !
(.pl|AsE I L. r .SC ÀDD 3 L. & .SC ADD 2 l|.' r

Íraus <27124> <- srATus,/cortnol REGTSTÊn ltcTRL DGcodGD
'CÀCllg ltlvAl B' ls mUE I f :
2D (Í{CIRL Decodc}

.rlRITE CACUE U' lg TRUE lÍ:
rIO ADnISS L' e

[ (.rRrrt AlLocÀ?E H' r 'ElrA ALLOCATE H' t IIIIVAL CHECK

L'' +

r IREAD Hr r 'ADD EXA DEL L') I
.'REàD H' lg thc IIIGH TRUE output of e latch uhlch ls enabl ed
('STATUS VAL ll'

dur ln9:

.ADD REG EIIA II'

tÀltH Input ls:
.PREFETCH DEL H' +

'ÍATCHED BUS 3 L'

.'EllA ÀLtOCÀTE H' ls TRUE lf :

(.wR cÀcuE orLr H' + .STATUS VÀL L.) t
,.'
HTT E H' + 'XLL BTTES H' +
Í.tÀïlcHED HtT I H. + .I.ÀTCHED
(.lÀl\CHED rA Cl L' r .I.àtcHED tA Ce L' a 'S!ZE I H')l

.'ALL BïTES Hr ls Èhe HIGII TRUE outpuÈ of e latch rhtch is
en.blcd durlng:
.ADD REG EXA HI
IATCH Input ls 1RUE lf

'PREFETTCII H' ls IRUE or

follortng Eus Functlon Dccodce:
READ PUTSICAL ADMESS

rRIT€ PTIïSICAL ADDRESS
BUS GNAI?

READ, lfo tlcRo-TRÀP
READ, SBCOXD REFEREXCE

ïRITE II'XGTORD
rRrTE torGr(f,D, XO nICRO-TRAP READ
READ LOXCORD
READ TITI ]iODTFT IT?EX?
READ LOI(TORD TItB TODIFT IXTEÈI
READ LOCX

for any of thê

.'READ ROT DEC H' is IRUE for any of the follouing 8us Functlon
Decodct:
READ
READ TIII

iODIFT TXTEr?
READ LCT
READ, SECOTD REFERETCE
REÀD, XO rICRO-IRAP

.'lAïCllED RE D ROT H' ls the HIGH TRUE outPut of an RS FLIP-FTÍ)P

vhlch ls scÈ by:

.REÀD ROT DEC H' t

.D CLtr ETABLE H' t 'B CLtr H'

and rcsct by:
.S?ATUS VAL H'

.'LD IDR ROT ll' ls IRUE if :
2e (ICTRL Dccode)
.'CïC IN PROG H' ls the HIGH TRUE output of an RS FLIP-FLOP
vhich is set by:
.ÀDD REG ETA H'

and reset by:
ISTÀTUS VAL H' + .PROC INIT H'

.'WRITE SCND H' ls the HIGH TRUE output of a latch vhtch ls
enabled dur tng:
.ADD REG ENA H'

ttTCH Input ts IRUE for: (8ue FunctÍon Decodes)
HRITE, SECOI|D REFERETaCE
ÏfRrrE tNLOCI(, SECOND REFERENCE

.'ilEtl REQ H' ls TRUE lf :
I.PREFETCH DEL H' +

(rBus cyc DEc Hr t 'PREFETCH L' t 'REPLÀCEilENT L') I
(.ADD REG ENA H. + 'CYC IN PROG L')

..REPLACENEilT HT Ig TRUE If :
.STATUS VAL H' t TREAD H' Í

'ADD ENÀ DEL LT

.'ENABLE INVAL H' Ís TRUE lf:

.illtux sEL sl L. t
[.tEil REQ Lr + (.ÀDD REG EilA H. r .RESET ÀDD ENÀ H.) |

.'IML f,It r ll' lr thc f,IG[ TRUE outFrt of a laÈch rtrtch Ís
.ntblrd durlng:
.IIVIL TRITE L'
lAlt[ Input lr:
.f,r? 0 H.
6,/C ADDRESS REGISTER

tfto S,/C ADDRESS REGISTER le a I blt latch ytrtch is enablcd

dur Íng :

.8 CLX H' I 'D CLtr EXABLE H' I

STATUS/COITROL ADDRESS REGISTER <- ïBUS <27221> (HCTRL Decode)

IÀICH Inputs arcs 'HBUS <27221> Hr
!ÀTCH Outputs ares rgC ADD (3:0) H'
STATUS,/COXTROL REGISTERS
CACTIE ERROR REGISTER

tltc CACIE ERROR REGIS?ER lg a I blt cdgc Èrlggered register vhich is
clockcd on thc RISIXG edgc of 'B CLi L' lf:
.D CLi EXÀBLE II' T
'SC ÀDD 3 L' t'SC ADD 2 llr t rsc ÀDD I L' 5'sC ADD e L' t
STA?US./COIfIROL REGISTER <- ïBUS <27224> (TCTRL Decodel
REGISTER Inputs ercs 'WBlrS <27221> H' REGISTER OrtpuÈs (3:e ) are:

Blt (3): ITAG ERROR ll'
ERROR nr
BlÈ (2): 'DATA
Bl È (l ): r LosT ERROR ll'
Blt (9): rllst REF HtT H'
ln addlÈlon, thG lndivldual bÍts eay by SÏïCHROIrOUSLY (on thc RISTNG
cdge of 'B CLtr L', PRESET and/or CLEÀRED ae follors:
B È <3> PRESET tf:
.STEER IAG ERR II'

8tr <2> PRESET lf:
.STEER INTA ERR H'

8lÈ <l> PRESET lf:
(.TAG ERROR BT + IDATA ERROR H') T
(.STEER TÀG ERR Hr + 'STEER DAtÀ ERR H.l

Bit <C> PRESE? if:
.EXA TÀST REF H' I

'HI?

BIt <C> CLAARED if:

.ETIA IAST REF H' T 'HIT C L'

All I bits.re

ASï]{CHROI|OUSLï CLEARED vhen'PR(f

IIIIT H' is IRUE.

CACHE GROUP DISAELE REGTSTER

Ttre CACHE GROUP DISABLE REGISTER is a a bit
dur in9:

latch vtrich is enabled

.B CLX H. t .D CLtr EIIÀBLE H. t
.SC ADD 3 L' I'SC ADD 2 H' T'SC ÀDD I H' t'SC ADD O L' E
STATUS/CONTROL REGISTER <- HBtS (27:.2tl> (trcTRL tlecodc)
I.AI.CH Inputs ares 'IBUS <27224> H'
IATCH qrtputs arc: 'CACHE CTL (3:e) H'

All I blts arc ASYNCHRONOUSTY CLEARED vhen rPROC INIT H' is TRUE.
WRTTE CACHE ONLY REGISTER

ttrc UíRITE CACHE ONLY REGISTER is a one bit latch utrich is enabled

dur in9:

.B CLK H' I 'D CLK EIIABLE H' E
'sc ÀDD 3 H' t'SC ADD 2 H' t'SC ADD I H. t .SC ADD g L. &
STATUS/CONTROL REGISTER <- !ÍBUS <27:21> (ltCTRL Decode)
IATCH Input ls: 'HBUS 21 H'
IATCH Output ls: 'lR CÀCHE ONLï H'

The latch Is ASTNCHRONOUSLY CLEARED uhen .PROC INIT H. is TRUE.
FLI P-FLOP DEF INITI.-'TS

are ciocked on the RISING edge of'B
I'STATUS VAL H' - D FLTP-FLOP

All flip-flops

CLK L'.

D INPUT:

.STATUS VALID H'

Tte flop ls DC CLEARED when 'STATUS VALID H' is FALSE.
I'PREFETCH DEL H' - D FLIP-FLOP

D INPUT:

.PREFEITH H'

tD. llop tr f cletred tf 'PR3?3ttt t' lr ?A153.
f.tlt?3ltt ctc t. - D ?Lr?-?loP

D tt?u?r

.tlt?3lictr D3L r.
lho Ílop lr E PRlSef íren .PRE?gt'rCX fL X. lr ttUE.

I'AD T?G IIA tr' - JI ?LIP-?I'?

J lltlÍlt

.la

R30 r.

3 .lrYAL Cf,ECr L.

T II?UIT
.tn3?gtt|| clc t. + .t cLt SrAtll n.
TIA D?L f,' - D ?ttP-?to?
D
tl?rft:
'.ADD

.AD R3G tI

lhr Ílop lr E ?nEStt rhon rAD REG EIA to lt IRUC.
f'ItVAL CXEI l' - JI ?LtP-tLOP
J llPlÍlr
.srAtsror c;l x. 3 .lrA8ltr trYtL l|.
I lIPUlr
.srA?sIqr Crt L.
f .txYAL ml?t u.

D IIPIÍlr

- D ?LtP{loP

. trvlL cnBct f,.

llro tlop lr E CLEÀRED vhon 'IXYAL CllECf H' ls FAI'SE.
I'TRI?E ÀtLOCA?t X' - JI FLIP-?LOP
J TIIPUT:
.EIA CACIIE ERR [' 3 'READ L'
T I]{PUT:

'lxYlL c||8cr Lr + IE!|A ALLOCA?E L'
l.cAcBE IXT lt' - Jr ?IIP-FLOP
J IIPU?:

.EIÀ CACf,E ERR II. T (.SIEER tAG ERR II. +.SIEER UIA ENN f,.I

T IIPUT:
. .I CII EilAAI.€ f,'
ttrc Ílop ls CIEÀRED drcn 'PF(f lIIt E' is lf,llE.
l'REPltCe e lt' - D/IoGGLE FLIP-fLOP
lÍ 'CACXE CtL I ll' lr lnUE, thc flop ls e D FLIP-FII)P.
D txPrÍt:

'cAclE ctL 2 L'
Ircn'GACllE CtL 3 tl' tr FALSE, thc Ílop toggles (on thc RISIXG cdge
oÍ 'l CLI L't tÍ 'Inltt CACIIE tr' ls lnUE.
tlrc flop lr PRESET vtrcn 'PR(rc txlt n' ls llUE.
I'PTASE I TI' - D FLIP-FTOP

D IXPIJT:

't clr Ell^ELf, ll'
cHrP outPuts

'cAcltE ctL I H'
.cAcHE CtL

' EtA mus H'
end lt tRuE (ll IGll I I f :

('sc ADD I H' r 'SC ÀDD t L' t 'CACHE CtL 3 H') +
('sc ADD I L' t 'SC ADD 0 L' t 'TAG ERROR H.l
.ENA IíBUS Ë.

and is IRUE (HIGH) if :
('SC ADD I H' t 'SC ADD 0 L' t

('sc ADD I L' t'SC

ÀDD t

'CÀCHE CTL 2 H') +

L' t'InTÀ

ERRm H.)

'lIÀ nus I'
.rÉ l. ltu3 (||IGlt ll:
ADD ! L. r .CACllE CTL I lt.t +
í'8C ÀDO I f' a .aC
('5C ADD I l. a .SC ADD t L' r . LO€t ERROn E'l
>>> 'nUS 2a l' (TRI-6tÀla, II-DIRECTIOIÀL' tt .n.bted if:
'lIA llt6 f,.
.nd l. ltul lIlGI, lÍ3
(.8C ÀDD I í. r .ÉC ADO ! L. I .CàCf,E CTL a t|.t +
('8C ÀDD I L. r .6C ADD L.3 .tÀS? RE? lttt r|.)
'
>>> .cAcxr rtt)L. lr tnuB (L(rt tfs
.ctc[3 txT u.
>>> .CtCllS cnP I rn X' l.

lxuE (8IG[, tf:

'ClCllB IXYAL ll' +
('IXVIL |RITE l' r 'l|IT I n'l

r. r
'rnttE ctcr8
ill I f,' + ('LÀItllED tllf t L' r
Í'llnCsED

'REPLÀCE a L'tl

tr' lr IRUE (l|lcf,l lf:
'IRITB CACES H. +
í.clcxt txvll f,. & .D cli Ef,ÀBLE r., +
(.txYtl xnITE t. & .tuyÀL ttT a ||.)
>)> 'CÀCN8 YtLtD I.l' 13 IRUE (Xlcl|l lf:
>>> 'CACÍE GRP a It

(.CICf,! IXYAL L' 6 'IXYAL HRTTA L'I I
I (.rArcrED Xrt I I. e rIAICXED Xtr a L.' +
t L', +
{'t^lC83D lllt I tl' r 'REPIICI
(.t Tcf,BD frT a L. s .nEptlcE, L.tl
)>> rCACÉE VÀLID , 8' tt IRUE (l|Icf,, lf!
.cÀcrE txYll L. e . lxvrl ínIrE L' r

+ .REàD t. + .ÀLL BITES
lt. +
Í.?ÀR tnn , t. .I]ITCXED
.U|tCltED

iÀ ,t L. r
i.Sfae f tr t
>>> 'BUS RO? Sl f,' 13 tnUE (trIcf) lf!
Í.tÀtcxtD iÀ ll f,' r
85

el l.ll

Í.rÀlt||ED iEAD ROr Í. +
'REÀD nol DEC l|' t 'D CLi EXASLE r'tl +
l('LD ím nol Í' 3.iÀD
'i cli Ex^a LE n'l t
re r|.tl
í.i/rD al lt. .ror.
>>> 'Daus ROt sa H' ls tRuE íHIGf,t lf!

Í.t TCIED i^ aa ll' r
t.l TCBED nEAD ROt t|. +
'READ ROt DeC l|' a 'D CLr EXAaLE H']l +
('LD fm ROt l|' r 'i CLI( EXÀELE ll' r 'iAD
H'l +
'e
Í(.RE D L. + .Ctr !X PiOG L'' Í
126 + 27 (ICtnL D.codCsttl

>)> 'exÀ afrE 3 L' lE IRUB ÍLqfl if3
.AIL BYTES H' +,'TNI?E ALLOCÀ?E I'

&
'HntfE scxD L'
I'SIZE I ll' + ('lÁTCllED IÀ ll. ll' r 'tAlC||ED IA ,e H'l +

('IAllClrtD iA al ll' r 'slzE t B')l

>>> 'EllÀ BYf E 2 L' ls lnUE (Lotl lf :

.ALL EITES n' + 'IRITE ÀLLOCÀIE L' +

.ínITE SCIID L. t

I E'l r
Í('lÀTcHED iÀ al L' i .l^lClrED
(.llÍtltED ltÀ rl ||. r 'SIZE rÀ la r..l +
('t lcllêD ltA rl L' Ê 'I lcllED rÀ ea n' r 'slzE t tl'll

.tRItE SCI|D lt. r

(.tÀtc|8D iÀ tl H. . .r rcf,ED nÀ tt H. r .sIrE I lr.,
>>> 'ExÀ lÍIE I L' 13 tluE (LOl, lf3
'ÀLL AYTES H' + 'TRITE ÀLLOCÀTE L' +
Í ('fRtrE sCl{D L' 3 'IITCUED llÀ al L'}

r
(.tllttED iÀ tl ll' + lslzE I n' +.srzE a lr'tl
'HRITE SCND ll' t
.srzE

(.l TcltED nA al H. r

I H.l

.ALL BYTES ll' + '[nItE SCf,D ll. + .HRITE ALLOC^TE L. +
('tlltNED lrt al L' r ' lÀltll8D tlA tl L't

tA t, E --->trl
rBus 27 t <-->tr2
! clr L --->ta3
rtuS 26 a <-->trl
[t? I Ë <-->tf5
mus 25 [ <--> tr6

It t___> tDus RoT st tl

t7 r <___ IAICIIED TCTRT H
t6 t <___ tartuED rcTRt 'a ll
t5 t <___ IAITtrED TCTRL 2 N

tt t <___ tarextD Bus I H
t3t<___ TAITNED BI'S II

cActt trT L <---tt7
Itts 2a n <-->ttt

t2 t <___ laltf,tD

tus 2
' B
ta r <___ IA1CBED BUS 3 H

tl | <___ I.AItBED BI'S I H

IIT Ë <-->rag
cÀc[tYILIDtB<---tlt
'
o..... o 39t<--- TATTHED TCTRT 3 H
srAPs'or
GROI'IID
::::iil .. LID .. 3tt---"Li
37t<--- IÀTEHFD TCTRL I H
YCC ---- tl3 . D(rr. 36 t <--- IAITUêD TCTRL 5
DATA PAR BRR t --->tII .
. 35t---- GROIND
H

tAG a PÀR 3RR lt --->tl5
TAG T PAR TRR [ --->tI6
cAcBE GRP I m E <---tl?
cÀcrt GRP , rR lt <---tlg

.o.....

llt<---

D CLÍ TTÀALE I

33 t <--- DST RIODE II
32 t <--- DSIZEOH

3l r <-_- DSIZEIH

EXADrIE OL <---tlg

3a t <___ STATUS YALID L
2g t <___ PREFSTCII L
2E t <___ T CLI EXAELE II
27 t <___ IO ADInESS L

cAcf,EYILIDrn<---t2t
txAErtt3L<---t2l
EIA BrlE I L <--- 122
EXAITTE 2L <---r23

25t-__> EUS RO? S l. H

mux sEt sl H --->t2a

25 t <___

iA,IH

CAT FIGURE I

PIX COXFTGURÀITON DIAGRAi AXD PIT{ IDEXTIFICATION

3.7

corDrttor coDC cffiTor (ccc-6lrl

GTITNAL DSECTIFITC:

tlrc prlrary functlon of thc Condltton Code (CC1 ehip is
to dctcrrlne the condl tlon codcs for YÀX and
lty rode instructlons, storc thc PSL bits
eaprttbtl
(FUrlYrDYrXrZrYrC) and rcad thosc blts to thc data pàth
rt ucode' rcqucat. ltre lnpute to thc llr Z. Y, C àrc
sclccted fror deta prth prlrltlvcs by Íntcrnal decodc of
Èhc opcodc. loglc ls lncludcd . to elgnal thc ucodc ln
crae of arltlrctlc tr.pa. nÍo braneh slgnals erc
provtdcd for ueodc branchÍng. llrcgc tre uscd to slgnal
true brench condltlons on branch lnstruetlons and to
supply letchad or unlatched data path condltton fla9s.

ccc TArt.E I

Pln ldrntlftcrtton rnd Grtr ïypo
ttttl
lPIf, | | PlI ID
a2

lr
lr

l5
l6

lr.
lrr
lrr

lr5
l16
lr7
lr8
lr9
42.
l2r
422
123

l2r

123
426
127
128

129

13.

l3r
132
133

l3r

136
137
139

lrr
lrr

l12
1.3
lrr

lr5
l16

. lr7

IIS

I C(nnErTS
ttl

lDSrZtlrl
I ALUZ Bt ll
I IR6Ë

I GATE rrpE

I GATTXN
I GATTXF
I GATTXF
I GATTXF
I GAITXF

lrnau
lrnTB

IIR5i
IR3Ë
IR 2E
IRIË
IR'tr

GAITI?

GATTf,F

GAITXF
GAITI|F
GAITXP
GAI?NF

?PA8L
?PAYL

ARI?B TNÀP L

GAT?TF

GAITr|?

I GAlrlI
I GÀITtr|

PSLCT

ccER t f,

PROC IXIT L

I GAI?X?
I GAITTF
I GAITZ?

BCLTL

mus tt B
mus a3 I
raus tI Ë
mus a2 E
D CLT IIABI.E H
cc ctnt't B
cc crRr 2 Jl
cc cTRr t n
CC CTRL 3 H
mus al Ë

GAITZ ?
GAITZF
GAI?:Z F

I GAltf,?

I GAI?XF
I GAI?X?

GAITXF
GAITX?
GAITTF
I GAI?N?

| ÀLUZ 82 U
I rsUS 35 E
ICIBRII
I reus ,6 E
lmustTE
I ALUZ 83 Ë

I GArfiZt
I GAlrrx

GAITZF
GAITZF

GÀI?IF

3r E
I rBus
| Àtrr a7 E
I Aurc 15 [
Àtlt 3l Ë

GAITX?

GÀITI?

I GAI?X8

GAITIII

ÀLUZ El Ë

GAITXF

ALu T5 Ë
U
ALlry
AL|,Y '7
3I Ë
| Itus 15 E
I IPÀ PRBSIIT L

GAI'f,F

GAI?II

GAITXF
GAITtrF

I GAITP?

Prrtonencas

ctocls - B cl,r L, D cLr ErABtt lt:
SCLrLsDCtt
IIIELB Ë erc TtL lnputt to CCC.
fie lnte rnel rlgnel, D Ct.f, t lr gcncrrtcd fror thc
rlgnelt B CLI L end D CLr EIAtLt ll.
2.2

DCLfLTBCLIL+
D CLT BIAST^E II.
cc clRL (3:l) Er cc ctRL <3rf) f, lt the prlmry conÈrol
tleld for the CCC chtp. It controlr tho rottlng of all
.t.tc rlcrntr ln CCC, erÉ tho vrlurr roureed oáto rtus
(7c5) tr mUS (3r!) f,, end CCBR (l:!) [.
D SIZE (l:t) A control rulttplrrore for thc Íollortng
s€t8 of rlgnale.
IXPUAS I
ItUXiZ B <3: f) B
ÀL|'Y (3l,l5rt7> H
ÀLlrc (31 , t 5, t7> L

outPut

I
I

nUX (SZl
OY íSZt

cm (sz t

tficec ouÈput! arc dcftnod ln ptrr. 2.7.
ïBUS (3lrl5r7:r> B:

tfrlr lr . bldtrrctlonal trl-rtrtc
port. (Xotc: BUS (3lrl5rtl> I rrr only lnputt.f
Ífrc Èrl-ttatc drÍvcrr trG rnrblrd r. t functlon of CC
CIRL (3:l) [.
It CC CIRL (3:l) Ë - /
thcn mUS <t:f ) B <- AllR <3rl)
IÍ Cl CTRt (3r O) tr r !
thon IEI|S (?:5) [ <- PSL (?UrlYrDY>
mUS (t:!) E <- PSL (Ir?rUrC)
C(f,P Ë: CGP Ë ls I tr.n.P.r.nt lttch loedcd froa I{BUS
<31> Ë. lt lr .nablcd rhcn D CLI t ls lor and CC CTRL
. l.
CCC lr ln capatablltty rodc lf CqP B r l.
Condttlon Codes - PSLC' ?tVrC)z Thr Cond I tton Codcs
rrC rodlflcd ln thrcc rryrr !! rclcctcd by CC C!RL:
À. Dlrcctly loadcd fror IBIIS nn B.
8. tlodtf lcd by dtrcct CC CTRI functlon
C. llodÍflcd aa a functlon of Opcodc.
CCC lg ln natlve (YAII todc lf C(nP I

2.t

Dl rcct tord

of Cotrd ttlon Codce: llrc conditlon codcs are
loedod fror IBUS<3:t) Íor the follorlng control strtcs:

Funct lon

cc crnL (l|Ex)

Ir I tc PSL
Irltc cc
Ir I tr PSI

I
Dlrcct nodtflcrtlon of CondÍtton Codoc: Ihen CC CTRL F, PSL<V> lr rt and PSL <IrZrC> trc unchangcd.
lodlflcrtlon of Condltlon Codo by Opcode: thcn CC C1RL
r Q (CC O? OP fl or E (CC oF OP 21,. rhc Condltlon Codcs
aro rodtfted .t . functlon of thc tollorlng:
A. IRnll
B. c(nP I
c. Ct CtnL . Cr CC of op I

Z.CCofop2

D.
E.

D SISE n ll
?PA PRESEII L

Date Peth prtrltlvct (!GG bcloí
?PZLendTPYL
Prrrgr.Ph 2.7 llrtr tho Drte Prth prlrltlvcg relectcd for natlvc
rode lnrtructlonr (rnebled vhon C(nP B . tl and capattbtllty
rodc lnttructlong (rneblcd rlrrn C(nP H . I ) .
tltr ltrtr tn Ptragreph 2.7 do not corpletcly dcecrlbc the
gPcrrtlon of CCC for all valrne of lR n tl and C(nP [. Opcretlon
for rny valucs. not llct.d lg undrflnod.
Gondltlon Codc lnput Prlrltlvcc: tlrc folloulng etgnalr rrc lnput
to CCC.
A. rtuxz 80 H
B. ITUXZ Bl ll
c. mu&z 82 H
D. nuxz 83 B
?.

9. rBUS<r7> H
F. mus<15> ll
G. rBts<3l> H

;

H. ALUY C7 H
r. ALUV 15 H
J. ÀLUV 3t H
tr.
97 t
ALUC 15 L
L. ^Llrc
i. Allrc 3r t

FPA Present L - PP z L. FP v L:

under ccrtaln condltlons, Fp
L. and FP v L are used rs the lov true Ínputs to psL <z> and psl.z
<Y> reapcetlvely.

?) a t rlÉ f? V t tro r.a to ..G tL <1, y> lartod oÍ tbe
prbtttr.. .tt cttl.d lo trrrrgr.Ê 2.t ubort tb. Íollortng
ccrÉltloar a3a 33rf . ttL C,CD rro brrÉled m ta ltrrr. 2.7.

2.tl

A. Cqtlr!
t. ?n nt3ft L r t
C. llalr??Acp
a. OC Clft hpl lor GC C O? I or GC C O? 2
lrrrrttfC.llrfrrrr
llrrfrll
llrrtlft
?tL C tr ttg C I lr r ttL ortDuc .qo.l to t8L <C>.
?U, lU, DYr tBL<?rt) (Dïr ?U, IYI .r. tr.nrp.r.nt
lrtcbore oDlrr Srn D Cll t lr tor rrÉ CC Cllt <!tf) I .
tbet .r. rordlrrlte tbrongh blUS<?:3)
t or l.
so.lrcclvrty. ttrt .r. ortFS Èc tà. nlt írcn Gc enL
<!rt) I - t.
Afltt ltlP Lr ftt?t tl^t L Èb. tnrrrtrd outpot of .n
- oógr trlggrred tltp Ílopr r.t rlCb 3b
Do.ltlvo gotnt
oó9r oÍ D CII L. tc tr oaly clorod ry cb. .tr.3tlcn ot
tfG lrlt L or bt D CLI t botrl lor rlch GC Ctrt . 2.
Arlth trep lr rt .t . trnptlon cÍ
A. CC Ctnt
t. tnpuc Èo ?8L v
c. cct I
D. llnl
B. l3t <DY>
?. PsL (IY'
G. ?tl ?r38Bn
f,. ?rr o?
(lrPut !O ?St Yl
CC Cfntl
Sl? Anll! tnAP. (IRAP
..Iot.t(?n ttBSBItl . (?F| OPDI . '(CGP I.f, . [tW.
DY O?' +
Ítv . tY oPl I
írorr
tntP CC CttL . (CC ClnL - À t C + E + ?)

DYOP. (lR n N ' ,arrlrrr

+ llhlarr
+ ,flrarrr)

ry op. (rR n f . ahrlrrr

+ lrxrrrrr
+ rrrlarta
+ rlarlaaa
+ lrlrrrrr
+ rrrlarrr
+ tlkrrrr
+ ,rllllrr
+ tllllrrr,

2.t

Àrlchn.tlc lttp coÍlc nlglaÈ.r (mcnlr Ítlc ÀÍtcn l. I
tour blt r.rd onlt r.gltt.s rhlch crn only cont.ln thc
v.llx llll or aaal.
ÀlCR <-- 6 tt (liÀ? CC Clnll t tDV OP, .(CGP N . tl
À1ll <-- I ll (lRÀP CC Clnl'tr(lv O?, .lCdE I . tl
ÀllCR lt
rltÈ thc ncg.lly. golng rdg. of D CLI L.
"h.ngcd
mus<3tt> <-- Àlcn lf oc clnl . 2
rh. errn 13 nor ch.ne.d by Rc rrrr or ày r.rdrne.
CCIR n I rr. lF llL outPul.. llr.a. .a.
CCtR <trl) l:
l.tr ln $llch th.a. lln.t .r. drlvCn.
dlffcr.nt
thr.G
A. lor V or Ccpatabtllty .odc br anch lnstsuctlonr tatt.
l. l|r. ouÈpot. ot Èh. ÀlU StÀTl lrlch.r c.n b. rouaccd onto

th... Iin...
C. lhl.Èch.d .t.tu. lnforrrÈlon c.n b. rourc.d onto thcra
llnaa.
tf CCC Cltl <l:r> f -1, CCIR I ll CCln -CC ClnL.l:
,, rnd C,Cln a I ls d.fln.ó h.r.lnr

IR <7:t> I

C(!D I

12
13
la
la
15
15
16

.
r
I
I
t
f
I

17
l8
lt
lÀ
l!
lC
lD
lE
lt

CflDttIOrS rff OCBn I I .l
z-a

t.l

O+Vl.a
(XaVl.,
Ír+Vt -l

oavt-l
(r+ (rÍt , -a
tz+cavri.r
r-l
I.t

.
1C.a; -3
'r
(c+z).t
r
V-t
.
y.l
r
C.!
.
C-l
CCAi a l| lr urÉarÍtnrd fos rny othCs st.ta of ln <7!a> i
.nó Crolp X.
ÀLu srAtt<l: a>r tà.

ÀLu sttTE l.tchG! lr€

Gdgê

:i':il'f"*tffl"Ë :*l iliritl"I'8 :i :n:,'l:t* 'un'

If CC CttL <3.a> I r 5,
slÀfa I | <- lf lBlrs <ls!> n - l 03 3 os 9 or Bor D
.l.r
8l Tl I I <- ,
^Lu
^LU
Il CC ClnL <3:t> U . 7
ALU S?ÀtA I [ <- CnI (SZt
ÀLu slÀ18 a B <- (nul (sz I r 11
CClt - CC CmL - a, 2, 3, C. E, ?: lÍ CC ClnL <3ta) H
-aor2 ot3orcorEorl,
CCIR t t. StOt (SZr aOV (SZ)
CCfn , F. íHUI (SZt . rl
CCEn - CC C|nL - l, t. 6. 7. 9, À, t:
If CrC CmL <3:0>
l| - | os 5 or 6 or 7 or 9 or tor I,
CCBRlr.ÀLUStÀtBll
CCBR t E.tLU STATE t ||
CCBR - CC Qlnl . 8r lf CC CIRL <3:a> tr - 8,
.
CCER t ll .tLU STAll I B
.
(8Zl
CCAi r E SlGr
a OV (5zl
CCAR - CC Ctnl . Dt If CC CIRL <3:t> l| . 0,
CCBR <l:r> || rr. undàÍlnrd,
9l

2.6
2.7

?RC III? L: Ilrrn DR(f III? L lr tttcrtcd lor, thc
ARIII tRfP lrtcb lr rryrrchrorpurly clerrcd.
DrÍlnltlon of tfrrt ttrrd ln GCC ?rblc 2z StcI(SZt

flll . ll or tf
rtUE<I5> lff EIIZ - Jl
Ítfrs<Í7> lff EIZE - J)
muf (82, . , lr dotrrrtncd by the ilUXZ B 3 A, n|uxz o2
f,, nurz ll I, nun g, I rlgntlt fror thc ALP. It
I!U8<31> fll

cgurlr:
Hluxt E3 u . nuxz 92 r . nuIztlt|.nuxz
BIZ! . tl or l,
IiUIZ ll [ . nUI Bt B tff D6IZ! . Jl
nuxz at B ttf E;IZE - J'
OV(SZI - ÀLW<31> I tff DElZt . ll or L,
ALW<15> r tff rlZB - Jl
ALW</|> E tff rËIzt - ,t
Clf (szl - ALtc<3I> L tff brsE . ll or t,
Atlf<I5> L tff EtZt - ,l
AtlrC<t?> t tff EtZe - JJ
Cf,?(szl lt the tnvcrr of CRIíSZ,

+ lr logtcal ORr. tr toglcel AnD, O lr loglcal X(n
?P CtlP X r hBlfS(I5> + Í (nUX Ffl.í) rCRï(SlzEl I

8' U tff

cOC trblc 2

lntegrr lÍlÈb.tlc e tagÍcel lnrtrrrctlonr:
GC

tovB

row

stGI (sz,

nul (sZ1-7

rorn

sIGr (szl
srcr (szl

nUI (S?l rt r2

nul (s21.9

oY(szl
,

c
c

sl(il (sz I

tUX (SZ 1 -;7

cLn

srGU (sz,

nUI (S21.7

cIrQ

srcx (sz,

nUx (S21-;1

oY(szl

SIGI{ (SZ)

nUX (SZ; -!

oY(sz)

eFF isz I

tc(xir
tcorL

srcil (sz )

ntUX (S21.7

trov:z8r

srcx (sz )

HUX (SZ 1 -;

t|oYlzrL

srcr (sz)

tllruX (SZ).;7

cvrr

srcrr (szl

tíllU:í (SZ ) .;7

cvlltL

s:GN (SZ )

rilUX (SZ;.;t

rOYÏ.

PrrsBL
CLRB

cÍrt
NXEGB

Nt|EGX
Nf,EGL

rc(nB

touzBL

cvra L

I
2

I
cc

TNSTR

OF
OP

lrbtr 2
lnCegrr Arttbrttc t toglerl tnttrtrcttonrr
GGC

CYTUB

cwll

nUX (SZ I -jt

cvttx

,
n|ux ÍLl ít

(ContD

Cf,PB

stcx (szl

CTPL

o
ov (sz,

ntux (sz 1 4r

TSTB

SIGX (SZ )

HUX (S21 r!

ÀDDB2, 3

srcx (sz)

}ilUX (521-1

oY(sz)

cRr (sz )

slcx (sz I

ilUx (S21 .;r

oY(sz)

cRY (SZ I

sIGx (sz)

tux (S21 r9

ov(sz,

cRr (sz )

srcrf (sz)
,/
slE2,3'

ïlUX (SZ 1 r;

ov (szl

ffitszl

srGN (szl

Itux (S2l-S

ov (sz)

Clt? rsz )

stlf'c

srcr| (szl

utux (sz1'i

oY (sz,

CFI rsz )

rrrl.B2,3

sIGN (SZt

rínux (SZ1-1

tuLL2r 3

rrux [Ll lJc

auL

sIGN (SZl

srcx (sz,

l|ilUl (521-1
nUX 1S2l-J t2

stGN (sz)

tilUX lS21r,1

ctH

TSTï
ISTL

ÀDU2,3

CFF rsz )

ADDL2,3
INCB

IICT

trcL
ADC
suBB2, 3

stDL2, 3
DgCB

DtCT

DEL

rull2r 3

DItr82r 3

Drw2, 3

DIYï.2,3

CCC trblr

lntogcr Arttlntlc

2 (Cone-l
3 Laglcal Inrtructlonr: (Contl
cc

rrstn

OF
OP

EDIY

srcx (szl

nUx (SZ 1 ';r

ASIIL

srGtr (szl

nUX (SZ 1 '!

I
I

ASITQ

srcx (szl
src[ (szl

nUX (SZ I .;t

IiUX lSzl-J :2

,
,

SIGX (SZl

IÍiUX (S21.;7

sIGil (SZl

IIIUX (SZ 1 .;r

stcrr (sz )

nux (SZ 1 .;

srcx (sz)

trlluX (SZ ) 19

sIGl{ (SZ )

tfituX (SZ 1.1

BI?B

BIlT'

EITL

BISB2, 3
B TST2, 3

BISL2, 3

Btc82, 3
B ICW2, 3

BIC L2, 3
a

XORB2, 3

xoil2, 3
xoRL2, 3

ROTL

tbl. !
Uortlt|g lolnÈ lnrtructlonar
GOc

l!$llR

It
oP

rovD
clll
cÍnD

slcx (slt

nur (Stt rl

srcx t.iir)

nux (szt {

t
)

c
c

2
I

iEGF

IDfrS<I5> nUI(SZlr!

cvtra
cvt6

srcr (szl

iICGD

cu?tï

nur (szl rl

nur tll ít

nul(szl-t

Ilux(Szl'l

t
,
,

,
,
t

cvtn

cvl?L

stcx

(szl

CYTDL

cYl.ttL

CYtf,DL

CtrtD
cwDt

IBIrS< 5>

cvtl?

CVIID

cvtr?

cvrD
cvtl.o
cÍtt!

CnP?
rst?

tstD

I!u6<15> nul(8tl'l
nUI (Szr.t
rE CtP I
tlirs<I5> ÍiUx(SZlr!

tEr2, 3

ADD2, 3

8tat2, 3

sraD2. 3

ccc t bl. t

Uo.tlnt ?otDt tn.!Íucttonar íContlnu.dt
ULt2,3
iuLD2,3
Drvr2;3
D!YD2.3
EIOD?

aooo

FOLTF

r'ol.tD
FP CÍí? x

CilD

XIUX(SZlrt

èl?(sz) { ux(szt.t

lft

GGC

trblr I

lódlorrr ?lrld, Gontrot Inrtructtonr:
GC

trtlrrzYco?
toYl

;oYlt
rovr0
Pt SXA!
PUSx T
PT'8f,AL

Prrsf,r0

slGI (sz,

nul (sz I .t

SIGI (szt
SIGI (SZ I

nUI (S21.;r

,
,

nux (S2; .!

?IELD IXSTRTrcIIOilS
EX"V

slcx (szl

tUX (SZ 1.;

txsY

stcx (sz,

nuX (SZ 1 r;t

ov (sz I

tux (SZ 1r|

lÍ

CFÍ tsz I

zxÍzv
OIPY

crPzY

src$ (sz )

oY (szl

??s

nUx (S21.;7

?FC

rtUX (SZ) rt

..0

coxtnol. IxstRucttoxs
ACBB

sIGil (SZ )

IilUx (SZ !.t

oY (sz )

ACSL

srcx (sz )

filUX (S? - |

ov (sz )

ACBF
ACBD

mus <15 >

ItUx (S21.1

AOtro

sIGx (szl

IlfUx (521-i

ov (sz )

srGN (sz)
o
ov (sz)

ÍtUX (SZ1.g

ACn

A(Dt.ss

SGGEO
SGGTR
CASEB

c^sg

cRr (sz )

CASEL

lrl

GOC trblo 5

Othcr lrtlvc bdc lnrtrrrctlons:
cc

TISIR

rorc 3

nUX (SZ) =Í

roYc5

SIGN (SZl
o
ov (sz!

nUX (SZ I -;t

cEY (sz )

sIGrr (su )

tUX (SZ 1 .;

Cliï rsz r

mUx (SZ I -;r

CFT tsz t

mux (SZ 1 -;r

CF tsz )

t|ltuX (SZ1-i

rËUX (SZ1-1

SIGII (Sz I

ÍËUx (SZ ) -9

iOVrc

ov (sz )

novTt c

sIGt{ (sz)

oY (sz )

orPc 3

srGN (sz)

ciFc 5

o
ov (sz l

SCAT|c
SPANC
LOCC

sxP
NÀTCH

cRc

iEIORï iANÀGETENT INSTRUCTIONS

PROBER StGt{ (SZ)

mUX (SZ1-9

PROBEIí

PROCESSOR REG TNSTRUCTIONS
NTPR
NPPR

srGN (sz)

tÍl,lUX (SZ I -9
a

Lg2

GGC

Othrr lttlvo

trblr 5

bde lnrtructlont:

(Cont,
cc

llatr

ItUx (SZ 1.7

CFf (sz )

rËux (SZ1-7

CFï tsz t

HBus [Ll tJ

o?
o?

ouluE rrstnucTtoxs

IEoUE

StGr (SZ)
o
oY (sz,

RAIQUE slct{ (Szl
o

oY (sz )

DECITAL 3 T{UiERIC STRIIIG IXSTRUC?IOXS
CYTLP

stcx (sz )

HilUX (SZ ) r;1

CVfPL

sIGr{ (SZ]

rtUX (SZ 14t

I
I

ADÀWt

srcx (sz I

l|ilUX (S21.1

ov (sz I

cRy (sz )

I]IDEX

slGN (szl

ntux (SZ 1.;

103

trble 6
Corprttbtl tty bdc Inrtructlone:
GOC

TISTN

iovB

rov

rrux (Sz1-1

SIGN (SZ

'
SIGX (SZ I

íiUX lSZ1.1

src0r (sz)

rËux (sZ; -;

ov (sz)

CtrÍ tsz t

corE

srGN (sz,

mux lSZl -1

ov (sz)

eFF rsz r

CTPB

srGN (sz)

tltuX (SZ I -j

ov (sz)

ëFT rsz r

SIGN (SZ

Hl'f UX (SZ1-g

cl,lB
CLR
IIEGB
NEG

cor

cnP
TSTB
TST

te{

CCC ?rble 6

Corprtibtl lty todr lnrtrrrctlonr:

(Gontl

ADD

slGil (szl

nux (sZ; .;

oY (sz)

cRY (SZ

trcE

srcf, (sz,

rtUX (SZ;.;t

oY (sz )

AEB

SIGX (SZ'

nux l9Zlt)

ov (sz )

cRï (sz )

suB

stGN (sz,

nUX (S21.;

ov (szl

CliY tsz )

DecE

srcx (sz I

IIUX (S21.;r

ov (sz )

srGN (sz)

IiUX (SZ 1-;

ov (szl

Cf,T rsz )

srclr (szl

tilUX (SZ 1.9

srctr (sz)

IlrUX (SZ I .;7

trc

DEC

SBCB

sBc
EITB

BIT

EISB

BIS

BICB

BIC
TOR

sxT

cc
OF
OP

IXSTR

stcx (sz)

nux (SZ I 'j

(slGDl (szl

ov(sz) ) +

.zt

| /,

cRï (sz,

ilUx (SZ ) .t

DIV

srcrr (szl

Ílf Ux (S2l -9

ov (szl

cRr (sz )

SAF

sIGrr'(sz,

líilUX (S2l -7

srGN (szl

tux (S2l.l

tr llrPuT o

mus<31>

I
I

slGN (szt

Hur lszl 'g

il txPuT o
c trrPuT

WBUS<31:8> /,

RORB
ROR

ROls

w8us ÍL

C TIIPUT

It5

CCC ltbtc 5

Corprtlbtl tty ls.dr InrtructÍonc:
ROL

s rGN (sz )

rilUX (SZ 1 -;t

ASRE
ASR

srGN (sz)

HilUX (SZ I .;

ASLB

srGN (sz)

ASL

stGil (sz,

INPUT O
c IXPUT
N

rtux (SZ1'i
nUx (SZ ) 11

IXPUT O

TXPUT

IXPUT O

TXPUT

(Contl
IIBUS <31 : 16>

ríBus<31>

ïBUS<31:8> /t

ll rxPqT o

rBUs<3I:16> /9 Z

c IXPUT

' sIGN (SZt

rnUX (SZ7 -i

ASH

s tcx (sz )

t{ilUX (SZ 1 -ir

ASlrc

sIGN (Szl
sIGX (SZ

ltUX (S21 .!

TFPI
iFPD

/, 2

NTPI
iITPD

IilUX (SZ 1-; .2,

la6

I
I
2

D SIZE E H ..-->tOI
D SIZE I H --->t0z
B0 H --->t93
^LUz
rR 6 H --->tea

FPA PRESEXT L

'8I,.->
47t<--- WBUS 15 H
{6t<--- ALuv 3l H
l5!<--- ÀLUV e7 H
alt<--- ALUV 15 H
rR { H --->tes
l3t<--- ALUZ Bl H
rR ? H --->re6
l2t<--- ALtr 3l n
rR 5 H --->tC7
rR 3 H --->t08
alt<--- At.rrc 15 H
ALtrc e7 ]r
IR 2 H --->t09
f')
rR r H --->trg .o.o... 'ltt<--39t<--- rBus 3l H
rR e H --->tll .
. 38t---- GRouuD
vGA ----tl2 . LID . 3?t<--- ALUZ 83 H
lrcC ----tl3 . Ddlt. 36t<--> IEus c7 H
FPA Z L --->tll o
. 35t---- GROUSD
ARITH TRAP L <-->tls .o..... 3lt<--> rBus t6 H
FPA Y L --->tl6
33t---> CCER I H
<---tl?
PSL C H
32t<--> ïBUS 05 H
ccBR e H <---tl8
3lt<--- ALUZ B2 H
PROC IXIT L --->tl9
3rt<--- mUS Ca H
B CLr L --->t20
29t<--- CC CTRL 3 H
rBus 0c H <-->t2l
28t<--- cc ctRL I H
27t<--- CC CTRI 2 H
HBUS C3 H <-->t22
mus 0l H <-->t23
26r<--- cc CTRL 0 H
rBts e2 H <-->t2{
25t<--- D CÍ,r ENAELE H
CCC FIGURE

PIN CONFTGURATION DÍAGRÀTi ATD PIN IDENTIFICATION

t07

3.t

crnn! L@r AIBÀD (Crr-r6t2)

GIISRAL DSSCNTPIIC:

tlrlr tp.elflcetlon dcscrlbcs thc dctall rGqulrcrGnts of
a 19 ptn eonf lgurat lonr Carry Loot Ahcad (ClAl dcvlcc.
fhà CIA chlp lt tn trr.tf of corblnetlonal loglc rtrlch
ut.a proprgrte end gcn.raÈc stgnala to goncr.tc carrles
for up to ctght ALt, rl iccc. tlrc cerrlcs c.n be
gcncratcd for clthcr blnary or BCD crlthrctlc as
dcacrlbcd hcrcln. ln addltlon to thc carrtca tnto thc
ALU ellcer, tho CLA gcncrata! tour addlttoncl slgncls; a
crrry out of Èhc cntl rc ALU nctrcrl (C8) r a stgn bl t
(?Sl r tn oycrflov blt (FOY), and thc 'orr of all carrtcs
(C). flrclo rlgnalr rrG alro deccrÍbcd bclou. tlre cxaet
boolcan aquetlong for all rlgnals gcncraÈcd ln the CLA
chlp Íollou ln CtA Tablc 2.
Itrtg chlp also eontelns lndcpcndcnt of thc CIA logle a 2
to I lnvcrtlng lultlplcrer rlÈh rn opcn collcctor
output.

CÍ.t TAILE I

Pln Idonttflcrtlon end Grrc fypr

t___t
Ptr | | Prr ID
I

lltrl
l2

13
lr
l5
l6
a7
E

l3
1l
ll
l5
l6
l7
l8

l19

12.

l2t

122
123

l2t

125
126
127
128

129

l3e

l3r

lt2
133

lcH
| c6 L

lrs

lr6
lr7

tt8

GAITTI

GÀITXF
GAITgN

GÀITTï

GAITZX
GAI?I{F
GAITNF

COB L

G?A L

BITB L

GAINN I

G5A L
G3A L

GAITI{F

G6A L

GAITNF
I GÀITT{F

GÀI"I{F

92L

c7L

G2A L
G6B L

I
I

c5r

GIA L

c3L

clL

GAITNF
GAITNF

GÀITTI
GAIT}IF
GÀITTI
GÀITNF
GAITIIF
GAITIIF
GAITIIF
GAITNF
GÀITXF
GÀITNF

G58 L
]. GTA L

ïrL
GLÀ L
P6t
P0t

GAITIF .
GAITNF
GAITTI

GzB L

P7L

GAITIIF

I c2L
lPlt
I gCDL

GAITTI
GÀITNF
GAIT}IF
GÀITNF
GAITf,F

IP5L
I G?B L
I rux ouT L
lruxINEI
I rux sEL H

ll|uxrxAH

GÀITTI

GAITTI

CIL

ctL

'lrr

GÀITTI
GÀITX?
GAI?XF

?ov u
BCD L

GIB L

'1r2
lr3

i-6rnÍr-f
GAI?TX

SBH
FSH

136
137
139

lre

i cers ttp3 i

P3r
G18 L
c0L

l3r

lrr

i cm:rrs

GAlrml

GAITXF
I

GAITTIF
GAINTF

Pcrfortaneas
2.1
Blnary Arlthnetlc: lílren the CtÀ chlp ls ln the blnary
arlÈhrcÈtc eodc (1.c. BCD L ls at Èhe hlgh voltage), the
carrtce tra gcneraÈcd ln thc convcntlonal lanncr for
look-ahcad. TtaÈ ts, thc carry lnto a ellcc ls a
functlon of thc cerry ln (Cr, and lourr ordcr Propagates
(Pt c) and Gcncratcs (G. cl aêcordtng to thc equrttoni
Cn ! [(Cf ] (Pt, (Pf ]...(Pn_g)l + [(cCt (Pt) (P21... (Pn_1]l + ... +

[ (Gn_2] (Pn_r' t + Gn_l

2.2

8CD ArÍthretlc:

tthcn thc CÍA chlp le ln thc BCD
Arltlretlc todc (1.c. BCD t lg at thc lou voltagcl , thc
order of slgntflcancc of the Pts, Grg and C's ls
altcrGd. The ordcr lg lÍeted bclor Ín order o(
decreaelng elgnlf lcanec.

llOtE: ttrls ls shorn lore clcerly ln thr egu.tlons

deptcted ln CtA Tablc 2.

ttf

OÈhcr Slgnalr:

2.3

C8: Ttte Cl,A chlp generates the carry out of the entire
ALU nctrork ln a rtnner slnÍlar to the carrles lnto the
sllces. Ítrls cerry ls aleo gcncratcd ln one of tuo
uatrs, depcndlng on uhat node the CLA chlp ls ln.
Slgn (FS) c lïrc CIA chtp Íe used ln thc Floatlng Polnt
Accclerator tn thc fractlon data prth. The floatlng
polnt fractlone trc unelgncd, thercfore an crtra blt
beyond the data path ls needcd to lndlcatc the slgn of
thc sul or dtffcrcncc bclng calculatcd. firls functlon
hac bccn dcstgncd lnto thc CLÀ chÍp. C8 and the sÍ9n
btt lnput (SB H) are used to gcncrrÈe thê floatlng polnt
fractton slgn (FS H).
Overflor: In addttlon to a slgn blt, the FPA neede an
overflou lndlcator. ttle ls proyldcd by Èhe overflou
ouÈput of Èhc CtA chtp (FOV ll).
C: The CLÀ chlp gcnêrates Èhc loglcal .or. of all
carr lcs (C Ë, .
tUX IN A ll, tUX IX I H, iUX SEL H, tUX OUT L: ltese are
the slgncls aseoclatod rlÈh thc lultlplcror, and arè
deflncd by thc follorlng truth tablc.
lrux sEL H trux IN A H
rux IN B H
I rux ouT L
I

e
e
e

I
I
I
I

0
o

I
I

I
c
I
o
I
e
I

Itl

I
I
e

I
I

o
e

co -

fG1", * (BcD, (G3 * p3Gz + prprG, + P..P2P5G| + P3P2P5P|GZ +
P3P2P5P|PfS + P3P2P5P|P?P6Crl

,r"or,J; + PrG3 * P,P3G2 * pcp3p2cs +

P0P3P2PSGC + PCP3P2psprGZ + pOp3pZpSptpZGS + pCp3p2nre{erpacr

C2-

tiól (crp,pl * Gepl + cll + (BcD) (c5 + p5c{ + psp{c? +
P5P{P7G6 + P5P|P?P6CI'

C3-

(BCD) (Crererr, + coplp2

* Glp2 + c2l + (BcD) (c2 + prG, +

PzPsG{ + P2P5PIG? + p2P5papzG6 + P2p5ptp?P6crl
C{a

tacol (cIPgPlP2p3 * coptp2p3 * clpZp3 * GZp3 + Gr) + (8cDt (G7 +
PzG6 + P?P6CI)

C5-

(BCD' (CrPcPtPzP3Pc + G0PIP2P3P. + GlP2P3Pt + G2P3P{ . G3P{ +
Ge) + (8CDr(G{ * P{Gz + P|P?G6 + naPrPrCr)

C6-

(BCD, (CIP9PIPZP3PIP5 + G0PlP2P3PtPS + Glp2p3pCP5 + G2P3P4P5 +
G3PIP5 + GOPU + G5l + (BCD' (Cr'

C7-

(BCD' (CIpgplpZP3PlPSP6 + GCPIP2P3P{PSP6 + G!P2P3PCPSP6 +

GzplptPsP6 + G3P{P5P6 + G{P5P6 * G5P6 + G6} +
(BCD, (G6 * PeCrt

BtNcS . (BCDI (CIPgP'PZP3PCP5P6PZ + G,PIP2P3PCPSP6PZ + GtP2P3PIPSP'PZ +
G2P3P{PSP6PZ + G3P|P5PSPZ + GIP5P6P7 +

GsPsPz+GrPr+G7l
BCIES - (ECD) (Gf * PlGe + P.PrG3 * PIP,PIGZ + PIP,P3P2G5 .
PlPcP3P2"5Gl + PIP0P3PZPSPIGZ + PIPCP3PZP5PCPZG6 +
PtPlP3PzP5PlPTP6C r I

ll2

FS.

(BrrcSl (sB) + (8rNc8l (sB)

nfv .

(BrNcSl (s8l

rl c .
NOTE:

C0 * Cl * C2 * C3 * Cl *C5 * C6 * CZ + BIXCS + BCDC'
8CD - BCD L

Pn-PnL
Gn' GnL
SBr SBL
CTT TAELE 2

2.tl

LOGIC EQUÀtrOrS

Pln Dcscrlptlonr

Slgnrl Plnr
CIL
POL

PIL
P2L
P3r
PIL
P5r
P6L
P?t
GEÀ L
GEB L

GIA L

FuncÈlon
IN
IN
IN
IN

Eloctr lcel
Chrrrctcr lat ler

lloÈcr

lll

IX
IN
IN
IN
IN
IN

SEE NOTE

t
I

rr3

Slgnrt ?tnr

cta L

cll Í,

ats

OI Í.

arrt
clr
caL
c$r
cIr

car t

cor
Grr r
c?r r
rDr
tlt
ctt
ctr
c2L

ttctlca
tr
It
TT
II
IT

II
lt
ll

tr
lr
It
IT
tr
lr
ott

olrt

otT

orrï

ttl -8tftt
trt -8rrt3
toilr toLt
tottr tol'3

olrl
oot
ott
ot?

tUIlu!l
ilfi olt? L

tottr togS
I
I
I
I
I

c3L

TUI 8TL I
llfl Iu À [

s33 ro?? A

qrl
oOt

c6r
C?L
llrcf t
EEt L
ct
t8r
ttov I

btrr

clL

ca r,

tlctct3lc.l
ClnrrcCrrlrtler

qtt

ot?
ont
IT

II
II

oul

ro?tr tot't

s3t rc?t I
8t3 ro?E I

to?tr Fol't
Opon Cotlector

IOIIS r

Ar fir G.r lnto the CtA chtp rrr brought lnto thlr chtp through trc
ptnr oeh tor lntornel buffrrlng rr.tont. tlt Arl rtÉ t'r rlll bc
conn.ctod tog.thcr .It1rn.lly lttng tn ettrct on. Pln.
!r Decrurr of lnCrrnel 9.tllr9 r.3trlctlonrr EIX Ct rlÉ BGD C8 erc
g.narat.d through tn trl-rtrtr drlverl, rnd rurrd by enrbllng onc
ór tho othrr rlÈh ICD L. tlrrlr ptnr rlll be connoct.d rrtcrnally
cro.Èlng ln rflect on. Ct t Pln.

lll

Glr --> tal
Itt<--- MIITAI
CT <---tt2
att<--- ru stL r
car <--> ttt
a5t <--- nrrrlt
Ël
att---> rl1l otrl L
al t <-- G'L
Gll r -->lfl
---> tt5
<-->tt3
etc
Itr<--- ?5L
s!r -->tt?
a2t <--- EDL
?st <---tlt
al t<--- ?ar
tloY I <-tf t
att <--> e2L
ED ]. <---t lt
ttt<--- ?7L
G'L --->tll
ttr---- GN TD
ET ----t I 2 . LTD. !?t<--> caL
rcc ----tlt . otDr. t6 r <--- G2r r
aaaaoaa
aa

G?T L ---> tla aa

lt!

L <-->tl5 aaoaaaa
G5À L ---> tl6
GTA t --->tl?

P2L --->tlt
G6A L ---> tl9

c7L <--> t2t
G2A L ---> l2l
G6l t --->t22

c5L <--> t2t
Ga^ r --->t2l

!5t---- GTqTD
ta r <--- GGL

ttt<--- P'L

r<--- D6L
3ó t <--- PTL
2tt<--- GIT L
2t t <--- GsI L
2?t<--- CIL
26 t <--> clL
32

tl t<--- Gl^ r

25t<--> c3r

CTA FIGURE I

PII COEIGI'RÀTT(T DIÀGRIN NID PIX CIARIFTCATI(II

tr5

t.g

clctt rnct ccttoL (crr-,Dc623,

CtrlrAt D3frl"llCr
.p.cltlcetlon drflner the d.Èrll rcqutrcrcntt of .
lblf
creho tcory Gontrol chtp (4r1. ltrc ci lntorfaccs to
controt portlon of thc rerort/ Íntorconncct (Ctf l.
!h.
rt g.n.r.t.r the nccclr.rtr control rlgnalr to inttiate
rrort/ cycler end returna sÈrtur to thc rest of the
r..ory lntorfacc loglc rt thc capletlon of cach rGrory
c1rclr.

lr6

cr rrltt I
?ln tóootlÍtcrtlon tad Grtr !tp.
l2

It
lr

ft
l6
It
le

lr,
frr
lrl
lr5
l16

lr7
lu
lr9

lza

IADIE3TAL
f (ilr 27t
I rallrBD ltf6 3 r
I lAÍCrtD !tr8 I tr
I utcr3D llrs 2 x

GAITII
GAITZ?

GAItï?

I GAIil?
CAt?I?

lcrtttr
IrlEar
I rqrcl.r SrLLt I
2ge .
I
l^ttrzD Errs , x
| cnr
2t f,
|
TA'TB
cf,t c?r, ?nIoRI"I r

I 15
fa6
ll7
IIE

GAI"XF
GAI?XF
GAI?XF

I CACIE IIT L
I IIf,IBIT CTI N
| STAtlrS I Ë
| cf,r 25 tr
| StÀ?ts YALID L
lsrlL
I GRÀn StAtt L

lsraL
| tr (rc
| slrflrsYEct
L
I rnrT3
CORR NTA IXT L

I
| Pnt?Elfl L
| cf,t 26 E
IDCLTEXAELEN

I G^lÍzx

I E? noDs tr
lDSrztfI
lDEtZtlU
2t I nur sEL sl Ë
2a I forD r
23 | SIAD8ËOT Crt L
26 | r83Q trrt L
27 I BIA CII L
129 | Delz t
29 | lrt GRÀm Ë
3f
lPrrS!lË
l3t
I rrtt Ë
ftz
I lrtf,

lr,
f lr
la2
l 13
lll

GAI?X?

I GAltx?
I GATNIP
I GAITXF
I GATTXF
I GAI"XF
I GÀI TF
I GAIIXF
I GATTCF
I GAIrfF
I GAI?TF
I GAIT!ï
I GAIICF
I GAIIXF
I GA!?XF

2l
22

I33
I3I
136
lt7
139

GAITZI

I GAIIïF
I GAltzx
I GATTTF
I GAITZX

crt t, f,
rArltr

I
I

GÀITXF
GAt?TF

GAIÏZF
I GAIT"X

I GÀITCF

GATTTil
GÀITCF

GAIITF
I
I
I
I

It7

GAtrrï

I GAIITF
I GAI?T{F
I GÀIIZP

IGAITIIF

2
?3ttrilAtt:
cnr l fo Ptxs
IPIXS

TTPT'tS

BCLTL

BusIH

cf,t cPu Pnlmrtr L
D CLT EIASII f,
D SIZE <l:l) X
6t RroDG U

sITB I

cAcf,E IXt t

IXf,tEIt Crt f,
txT GnÀrt I
IrlfxED EtS (3:0) H
T CLT EIIAI^E U
iAD <fl:ff) ll

nux sEL sl ll
rsEQ txtT L
PlrÀsE I H
PREFEICH L
tl

rAlt

BI-DIRECTIONÀL TTNES (TRl-STÀTE TTNLESS OtI|ERTISA NOTED)

OII <27:25) H
DBBZ L
HOLD L

ST (l:0)

I (OPEX{OLL.

I (OPCr-COLL.l'
2 (OPErr{OLL.l

ouTPuTs (ToTEr FOLE UïLESS OtITEUISE XOtEDI
ÀDD REG ENA L

CII <3I:28) H

CORR DATA INT L
ETÀ CtrI L
GRAXT STÀLt L
SNAPSHOT Ort L

S?ÀTUS <l:C) H
STÀTUS YALID L
rRITE YDCI OCC L

a (tRr -STATE I

I
I
I
I
2
I
t

lr8

2.1

th. Íollorlng lr r llrt of thc codc errÍgrrcntt for the
llf ?ltGtlC llcro flrld:
J. RIAD
ADMISE
l. nc383n
trttlAl'tzt
'ITSICAL
2. tlAD, ro tlcno-tnAP

3. llo trttrAltzt
l. ntAD tcl ?tt30u? tBs?

5. IOP
6. RtAD, SEOID Rl?tRErcB
?. IOP
t. mttS PËISICAL ADnESS
9. Rtt cxEr
A, TNT?I, SEOD RE?INBrcI
t. ntt3 lrtcr, SEOD n!?3nBrct
G. rnl?B, ro ttcno-tn P
D. IOP
t. nttS tlrdcD, x) ;tcRo-?nÀP
?. tt s GRlrt
I'. RtAD
II. NEAD IOETCD
12. Pl? TCCISS CtEr, rRltc
It. RIAD LOCI
I'. Rt^D II?T TODT?I IIIEIT
15. ntAD tilcfiD rttf, toDt?ï tx?8xt
16. Pt3 rcctss cf,Ecr, ntAD

I ?. Fft rcc388 CtEr, RtAD, TERXEL iODC

It. mttS
19. nl?3 l,FrcD
lA. mt?t t? rql noDE
lD. rnt?3 ttlocr
lc. nol AccBss, rnrtt, roDE sptctFtED
lD. PRC8 tSCtSÈ, IRITE
It. tnGE ACC3SS, RBAD, iODE SPCCIFTED
l?. PROt ACCE5s, READ
Eur

hnctlont rro drcodrd f ror 'ÍAÍ\CllED 8US I H'(FLIP-FLOP)

.nd .laltrtD Bts (3:t> lt.

l19

2.2

Cbfp OuCpurr:

of:
tÁlftr?D BUS ?Uxc?tor
PNE?ETCf, Ct!LE

laltEtD D-StZE

tAD <rl:0t)

Cfl<31:2t) drlvcrc arc cneblcd durlng'EXA FIJlaC l|.
'lAllCllED BUS l' (?LIP-FLOPI and 'lAttCllED BUS (3:e). .re
docodcd and thc dceodcd f unctlons !!r-' cneblcd into
latcher durlng 'ADD REG EIA Hr Èo provlde TATCHED BUS
?ufcTlors.

TPREFETICtr H'

lg alro cnabted
tnto a lrtch dur lng .ADD
TPREFETCI|
RtG EXA H' to provldc
CIItE H..
ID-SIZE (l:f) B' arc cnablcd lnto latches durlng:
.ÀDD REG EXA II' I 'PREFE$CH L' t'IATCHED BUS { H't
'IATCIED BtS 3 lt.
to provldc IAI.GHED D-SlZE.
A prcfctch cyclc cluscs all four blts to bc ones. In
tddttlon, thc follorlng latchcd bus functions cause all
four bÍts to bc oncs:
REÀD Pf,TSICAL ADDRESS
READ LOCT TINEOUT TEST

REÀD, SECOXD REFERETCE
BT'S GRAXT

ïRITE LOIG, XO nICRO-TRAP
TRT?E P'IïSICAL ADDRESS

I'RI?E LO}|G

READ LOIrc TITH IODTFT TNTENT
READ tOXG

In all othcr ctscsr Cf,I<3I:28) are produced according Èo
thc follorÍn9 thrcc tables:
For all READs:
iA(l: e)
ll
Le
ae
el
+--------+--------+--------+----- ---+
I
Lgoo
llee
llll I lll0
I
+--------+--------+--------+--------+

L20

Por all IRltEs crcePt rRItE, SECO||D REFEREXCE and rRlTE
url.()ci; sDc(nD REPEREIICE:
iA(l: t) t,
0l
II

+--------+-----___+____ ____+________+

ITSCHED

otal
coLc I at90 I loca
I
I
+--------+--------+--------+--------+

or I cerr
I

l0r0 |

I le t

el le

+--------+------

D-SIZE(l: e)

--+--------+--------+
I
lll,
llee
rece I

re I rrrr

+--------+--------+--------+--------+
I
tl
llll
llle
llec I rgcc
I

+--------+--------+--------+--------+
FOR ïR!TE, SECOND REFEREI|CE ÀND HRITE UNLOCX, SECOND
REFERE}{CE:

llA<t : C)

0I
le
ll
+--------+--------+-------+--------+
ec

IATCHED

D-SIZE(l:0)

oest I

eeel I

eecl

ceel

+--------+--------+--------+--------+
rtl
I
el I eeor I gesl I goeL
c00l I

ttl

^--------+--------+__-__-__+________f
lo i ssst
coeL
ocl I
ctlt

ttttl

+--------+--------+--------+--------+
I
- cgll - etll
lr I eeoL
eecL
r
+--------+--------+------ --+--------+

l2l

>>> fhan anabl.d, CÍtl<2?325>.rG tunctlon! of:
PREFEICII CICLE

t^rcf,lD tus ?urc?toxs
l ltlllD D-SIZE

liÀD <al:at> f,

ll|G trl-rtrta drlv.Ía lor Cf,I<2?s25> .ra .l80 anablGd
durlng'ExÀ FUrc B'.
lÍ 'PRBIETCII CtcLE x' l. ltul. ctt<2?s25> ulll bc: al, íÀLL L(It.
OthcteÍ.c, Cll 2? I rlll be I (ItcU tor lll rRt?ES.

C[l 26 ll ulll b. I (flcXl fot:
NEID TITI iODI?T IX?EX?
NAÀD LOTGX(ND TI?N iODI?T IXTEXT
READ LCt ttiEour tlst
Ct'lI 25 ll Ytll b. I (EIGllf lf 'U)Ct l|' ls mUE,
'L(fR H' l. IRUE lf!
i
READ LOCi
||RITE tll|L()Ci, SECOI|D REFEREICE
InITB lrl.lcl( I 'suPPREss L(Ef, L'
'SUPPRESS LOCi H' l! tlUE lÍ:
D al H' & 'llÀD te H'a LÀTC||ED D-SIZE e H +
'lHtclrED
D-sIzE I H Ê (.iAD al H'+'nÀD It lr')
>>> rDtBz L' la rn opcn-collCctor drlvrr, and Í3 drlvên loe durÍn9
.EXÀ
FU||C lt. .
)>> 'llOLD L' 13 an opcn-collcctor drlvcr' and 13 drlvcn lou lf!
.sxApsHot cnt H. t .It{v L xRtTE L.
>>> 'sT <l!a> L' .!G oP.n collcctor drlvcrs, and rrê both drlvên
loe durlng 'XRI?E YIC?OR ll' .
>>> .ÀDO REG EXÀ L. lr drlvQn dlrcctly fror thê'^DD REG el{A H'
Íllp-flop rrd lt Ld thCn Èha fllp-flop lE set.
>>> 'CmR SlÀ flf !' ls drlvên dlr.ctly fror th" 'CORR DATÀ tllT ll'
fltp-flop rnd ls Í.C rh.n thc fllp-tlop ie rct.

t22

)>> .E!tÀ CiI L. ls tru" (LOít it:
.SEl EÍ{A Cxt H. r .SET BUSy lt.
.SET Er{A Cr,tt B. ts rruc lf!

'Crl REQUeST H' + Cil EIA8LE Lrtch ls sct
cïI EltÀELE t.tch ls anlbl€d rhlle'B cll L' t3 LO{. t tch input is:
(.cïl REouEsT lt. I .sET ausr ír ! .c I ENÀ Lr) +
(.DaBZ H. r 'REÀD L'a 'Cit Er{À H''
rcil REQITESI H' la true lf3
.[oLD L. r .Dtaz L. a .Cf,t EL^ L. r .iSEo tl|rT L'r
'CPU PRIORITY N' T 'READ LOC'( ttIHtBIT L'

.READ LOCX trítBt? ||. ls rruG tf!

.LOC1 SET H. s REÀD Lg6tr(L.tchcd bus Íuncrton,
.RAÀD H. t3 ên.blcd tnto.
if :

lltch during .^DD REG ENÀ H..nd ls truc

'PREFS$CI tt. +
{RE^D focf TtÍíEoUT rEsT | Àny READ}Bu5 Funcrion Dccodes

'SET BUSY tt' lr

tru. lf!
'Olt eIA 8' + LÀtCttED EUSY iÊ s.t.
LATCIIED BUSY Lltch ts cn.bled rhlla 'B CLR L' ls L(t.
Làtch lnput
13!

I'ADD REG EI{A H'
'ITHIBIT EUST L'
'
t .aUsI L.t +
(.cít Ix PRoG L. rrisEo INtt L. I
.TtiEou? L. & rBusy 1.,
'rIt|IBtT SUsr tl' ts truê lf:
.PREFE,!C8 L. I (AUS GRÀIT(Bus Íunctlon d.code] +
'D.CLK EtnALE L. + . CLK ETATLE L.) +
rNltrBtr c r H. +
'READ ll' 3 'READ LOCX L' t 'llIT H'
'READ LGI( H' ls truè I f i
.PREIETCH L. É R8ÀD LOCK (Bus Function Decoda)

I23

DlrS GRAXT (Bus f unetlon dccodel f

Í('PREFEICH L' I 'BUSï H' t 'iSEQ IXIT L.t
('PllÀSE I L' I 'SIï IXt DOI|E L' r
'rRITE YECTOR L. r .nSEe II|IT L., I

Íllp-flop,

and ls Lff rhcn Èhc flop ls set.

'SIATUS C H' fltp-flopc, end tre lllcH uhcn the respcctlve flops are

tQt.

aete or tf 'B CLX ll' and thc D-lnput of thc 'STATUS VÀLID lt'

ftÍp-flop ls truc.

2.t

fltp flopr and ls LOf rhcn thc flop ls set.
Rcad tock Tlrcout Countcr: Tlrc IIIEOUT COTNTER is a synchronous
eountcr rhlch ls clockcd by 'TIIEOUt CLX H'. 'TIiEOUT CLf H. is
Produccd by gattng '8 CLtr H' uith the output of a togglc flop rhich
chrnges ttttc on each rlslng cdgc of 'B CLX L' Grccpt uhen 'iSeQ
IXIT B' lr truc (HIGH). Durlng 'ISEQ IXIT H' Èhe Èoggle flop ls!B
3Èecrd ruch thrt lt tc clockcd to thc stete vhleh allous cach
CLf [' to producc a 'TIIIEOU? CLtr B'. ïtrc tftp-flops ln the TIiEOUT
COUXTER arc elocked on thc leadlng (rlslng) edgc of 'TIiEOUT CLr
H'.

of thc IIËEOUT COUNTER .re sct
'TInEOUT H' ls true Íf all I bltsTTIiEOUT
(OXESI and thê flop vhlch grÈes
CLI( H' ls reset ('TIilEOUT
CLtr ll' dlsabled).
'
ltrc TIiEOUT COUilTER ls cnabled lt:
('L(fX SET H' t 'BUSI H') +

READ LOCI TITEOUT TEST(Bus Functlon Decode)

Thc TIiEOUT COU}|TER has tuo countlng rodcs. lf 'LOCK H' ls true,
thc counÈGr opcrtÈGB as a rynchronous bÍnary counter..

If .LGf B' ls fal'sc, rll bttr of thc eounter arc lnhlblted fron
rcscttlng unless. Èhe counter lg full. Blts arc set, on the rlsing
cdge of stlnEouT'CLf, H'e vhen all lcss Btgnlflcant blts rre set.
ln elthcr rode, Èhc counter counts to all zêros on the clock aftcr
Ir counÈa to all ones.
Ilrc countcr ie cleared on the rÍslng edge of 'TIilEOUT CLK H' vhen
thc lcaet slgnltlcant blt ls zeto and Èhc counter enable terns are
falsc.
t2a

tllP-ILOPS cloctcd on frlllng

GdgG ot 'B CLi L':

f'SxtPsllo.t cit ll' - Ji FLrP-?rOp J tnput3
'ÀDD ClC lr. Ê .cf,t 27 I. r rcf,I 2ó L. r .Cir rr pf,oc L.
'ÀDD CIC trr 13 truc lf:
l|t r .DBBZ DEL L. r .iSEO txlr

'DlaZ

x Input:
'IXVAL IRITE H' + r||SEQ IXtl l|r
f'LCr SEI ll' - JX !L!P-FLOP J tnput!

lF r
27 L'r.Cf,t
.CiI CIC
tI PRq; L''Cnl
rÀDD

26 Lr e .cfit 25 lr. r

ll Input:
.CttI 26 L. r .cit 25 H., +
(rÀDD CIC ll. t .cïl 27 Nr
i||SEo lxll Í' + 'TIlEouT l|.I
l.srÀTus I [. - D FLIP-FU,P D tnpur!
.sT I ||. + .FIXÀL CrrC DEC L.
Cloctlng of thc flop l! lnhlblÈed lf 'SIÀ?US V^LID r|' lE truc.
Thc flop 13 E SET rhrn 'I'|SEQ IxIl

l|' lr IRUE.

lïC flop 13 E cle.red lf3
.TIÍIÊOUT I'+
.CÀCEE IXT T' I (ISTÀTUS YÀLID f,' +
'B CLI I'I
.FIIAL CIC DEC l|' ls IRUB I f !
.
.Cf,l lx ?ROG ll' & 'DBIZ L'
f'STÀTusall'-DFIIP-FII)PDInput:
.st t t. + .FrxAL clc DEc L'
Cloctlng of thÊ floP ts tnhtbltcd'lf 'St TUS VtffD H' ts truc.
tb. alop t3 E cl.lrcd rhan 'lÍ'tEot r ||' Ir tRuE.
?LIP-tLops cloctcd on rl3ln9 cdgC of 'B cLi l'!
t'Err F|IC B' - D ?LIP-?lrP D lnPuts

L25

'_,

.SE? BUSI ll. r'Set

E]{A Cit f,. r 'IDAZ L'

l.ÀDD nEG EIA lt. - Ji FLrp-FrOp J Inpur:

.iEi REQ lt. r .rrvAL cHaci L.
.iE|t REO n. ts ltUE !f:
t.pREFElcn DcL H. +

('lrrs clc DEc
ll'É 'PREFglcll L'r
.aust
L. s .cf,t tra pRoc L.

'REPLÀCEËEIfT L'll

'1EPLACE;EXT ['

l5 IRUE iÍ:
.S?A'US VALIL lt. r .ÀDD Ex^ DEL L. É .READ H.
t.ÀDD ExÀ DEL lr. - D FLtp-FLrp D tl{puT:
.AIT' REG ETA H'

'BtS ClC DêC N' i8 lRue for: (Bus function d"codcsl
nEÀD PlrïStcÀL ADDRESS
REÀD. XO IIICRO-TRAP
REÀD L(rr
tESr
REÀD SECO "rtíEOUt
D NEFEREXCE
rnllE PTTSTCAL ADInESS
lfRITE. SEC(XD REFIREXCE
tfRIIE U LCI, SEcoxD REFEREICE

rnrrE, xo lr tcRo-tRÀP

I.RI?E LOXdOnD, xO iICRO-tnÀP
BI'S GRÀXT
nEÀD

iEAD LOXd(nD

READ LCÍ
R8ÀD IITII I|ODIFI ITTEIT
REÀD LOXEORD IITII IIODIFI IXIEXT

INITE

rnlTE LOlGrmD
TRITE I'XLCI(
DSt RI'IODE L' a mtTE lF lloT R ODE
K lnput!
.PREFEICI CICTE ||. + .tí CLI( EUÀ8LE fli
I.PREFES:II DfL ||. - D FLfp-FL()p

D rnputr

.PREPETCII IT'

the flop It lE CLEARED lf 'PREFETCII H. ls FÀLSE.
BUS' E' - D FLIP-ILOP
'.IIIETED
126

D Input:

H.t +
í.Bts a E. t .; cLK ErÀgLE
.n

(.tÀtcËBD 8us I H. 3

cLX EilÀBLE L.)

I'IML CIECtr B. - JX FLIP-FIOP
J tnput:
IEf,ÀBI.E INVÀL H' T TSTAPSHOT CIII H'

.EIIÀBLE INVAL HT Is TRUE Tf :

rilt|ux sEL sl L. t

('}tEl REQ Lr + IADD REG ExÀ H. I .RESET ADD EitA H.)
'RESET ADD EXÀ H' ls TRUE tf:
rPRE?ETCN CTCLE HT +
'il CLI( EI|ÀBLE NT
K Input:
.sl{APsHoT cill L.

I'INYAL TRITE H' - D FLIP-FU)P
D Input3
.IT{VAL CHECK II'

ttre flop ls IE cleared rhcn 'It{vAL CIIECK H' ls FAISE.
I'TRTTE VECTOR HI D FLIP-FLOP
D Input:

'TIIEOUT H' + lR VECT IA$CH ls seÈ

rR VECT IATCH Input:
rÀDD CïC H. t .Ctrr 27 11. t rcilr 26 [' t 'crr 25 L'
ttre latch le cnabled rhlle 'B CLtr L' ls HIGH.
I'CORR INTA IIIT H' - JT FLIP-FU)P
J Input:
.STATUS I H' t
E L' T
.STÀTUS VALID H''STATUS

f Input:
.t cLi ExAEtE H'
I'STATUS VALID II' - D FLIP-PU)P

D Input:

127

+ .ADD REG ErA L'l t
[('[I|HIEIT BUSI U. TRESET
(.ADD REG EXA H. T
ÀDD EXA ll+
'FIllÀL CïC DEC H' + 'TItrEOUT H'll +
'tsEQ llllT H'
l'Bust n' - Jx FLIP-FLoP
J Input:
.INHIBIT BUSï L' E 'ADD REG EIIA H'
K Input:

.cnl IN PROG Hr + 'iSEQ INIT H' + 'TItrEOUT H'
I'CIII IN PROG H' - JT FLIP-FLOP
J Input:
.SET BUSI lt' t 'SET eXA Ct{I H'
K Input:
.D8BZ

Lr + r}|sEo INIT H.

I'DBBZ DEL H' - D PLIP-FLOP
D lnput:
'D8BZ H' t 'I|SEQ INIT L'

I'SYII IilT DONE H' - D FLIP-FLOP
D Input:

'llAlT L'e rtlt|T GRAXT L' t IllT IÀTCH ls set
INT Í.àTCH ls set by 'fNT GRÀI{T H' and reset btf 'Pll^SE I H'.
I'CTI ENÀ HT - JK FLTP-FLOP
J Input3

'CllI REQUEST H' r 'SET BUSï H'
K Input:
IREÀD H. + .DBBZ L. + .I|SEQ INIT Hr

I28

BCLf,L ---> t 0l

l8 t <--- D CLT EI|ABLE H
a7 t <--> crt 26 al

ADD REG EXÀ L <--- t t2
cf,t 27 a <--> t 13
tAltl|ED ErfS 3 tl ---> lal

t6 t <--- PREFETCII L
t5 t ---> CORR DAIA Ir|T L

IATCTID BUS I H ---> rf5
rÀrtËED Bus 2 E ---> tf6
la7
crt 3t I <--> tt8

BUSIH ---> tt9
T CLf, BXÀBI.E H --->tla

cnt 29 B <-->tll

tt t ---> ïRITE YECT OCC L
l3 r---> STATUS B
t2t<--> sttL '
tl t---> GRÀf,T STALL L
ta t <--> STIL

aaaaoaa

39 r ---> STATUS VALID L
38 r
GROUilD
3? t <-->
25 H

-------tl2 . LID.
crt
lrcc ----tl3 . DOÍN. 36t---> STATUS I H
I.ÀI\'EED BUS 0 Ë --->tll
35 r ---- GROUIID
ctrI 28 H <-->tl5
aa

VGA

cf,I 39 H <-->tl6
íACIH --->tl7
nA oeE --->tl8
Cf,I CPU PRIORITY L --->tl9

aaaaaaa

ET RiODE B ---> lzc
DSIZEOB ---> t 2l
DSIZEIË ---> 122
HUX SEL SI H --->t23
HOLD L <-->t2l

<--- IIIHIEIT CïI H
<--- CACTE IXT L
<--- HIT H
<--- rAII H
(--- PHASE I H
<--- ITfT GRAXT H
281(--) DBEZ L
27 t---> EilA CNI L
26 t <--- rSEQ IXIT t
25 t ---> STIAPSHOír CHI L
3l I
33 t
32 t
31 t
30 I
29 t

CtrK FIGURE T

PIX CONFTGURÀTIOX DIAGRAII AtrD PIX TDEXTIFICATION

L29

3. l,

corsoLE IXttR?Act CEIP (C(t-E6rU

l. Gtrtn t D3scnlPtlor:
Tte console lnterface chlp (COll) ls rn asynchronous ser ial
Itne lnterface.
rt contaÍns loglc to do llrttcd character
recognltlon of the rêcelvcd cheractcrc for cntcring ln Consolc
l{ode. rt.ssêrta slgncls to rGgucat lntcrrupts. Àddrcsslng
of lntcrnal rcglstcrs ls lndIrect through Console Rcalstcr
Address RcgÍstGr (CRÀR, .

cor ttbh I
Ptn ldrntlflcttton trÉ GeÈo typc
I
I PIT

l2
l3

fs
l6
l7
l8
l9

PII ID
rt wctnL
0
I

c(nlErrs

GAT? ïPE
GAIT1TF

iSEQ II{IT L

GÀIIXF

ïCTRL 2 H
CHIP SEL L

GAITXF
GAITI|H
GÀI?TX

HCTRL 5 H

GAII1TH

HALT D8T BR H
DOXE BR L
FRX? Pt{L LOCI( H
SERIAL IN H

GÀITIF

GAITTIF

GÀI"IIF

rJo

CC trblr t íGontl

?la ldmtlttcrtton trÉ GtCr tyfe
I

Itlr I I?IIID
fr,
I CTT DOIE II L
I T RIADT SITC L
lrr
RD II.l IIf, E
llr I rDus
aa a
I
ll5
It6
It7
Irt
lr9

12.

GAI!I?

GAITI?

stRItL ou? Ë
| XAIT LIGTI t

GÀtrtr

GAIIZ?
GAltiz?

rSus a7 a

GAITZF
GAITZF

| COI TAL? L

GAlrcx
GAITIF

IISTN ?EIEE f,

lze
13,
t36
t37
t39

| rctnt, 3 f,

lr,
lrr
lr2
lr3

GAIÍrï

GAITZF
GAITZF

I
I
I
I

f3r
atz
It3
frr

GAIII?
GAIII?

rsts ,t u
rttB a2 a
rous t5 f,
rEtE al x

122
123

125
t26
127
l2t

Grt3 tt?t
GAITI?
GAISI?

ICODCLIL
I TIIT TI CTR I
I TAUD RA?3 CLT T
rEtr ,3 f,

f2r

l2r

ciltrtr

GAltrF

IOAD CT.I B

GAITTX
GAITZ?
GAITT?
GAITXF
GAI?TU

rrus ,6 tr

TCT,IL
rctRL
I I
I
Snrc l|
D3?
| EAt?
CLR
C?TT
II t
I
|
|

GATIïF
GAI?IIF
GAITID

D CLT 3IàAI.D f,

rEuE

GAITTX

B
Ë

rsus 't
t9
cox rrt t
| ICLTL
| ctt ctDt ot r L
,l
T RSADT IR L
lll
I INT ERR BI L
t.s
116 I rctnL | tr
Drt out L
tr? |I cÍn
DoXB SIIC L
lrr
I
I

GAITZI

GAT?P?
GAITXF

GAIrlF

GAlrrï

GAT"XF
GAITTF

GAIrlF
GAIlr|?

r3r

2
2.1

?orÍonrncr leeirltcnt.3
ftUS (?:f) [: rlUS (7:l) H lr rn clght btt trt-ttrtc
trrn.c.lvrr.
lt lr I port by rtrlch tha lntornel
reg lrte rr .r. lccorcd.
If READ CRAR, IBIrS <9: t) Ë
drlvorr .rc enrbledr rhd erG drlvon rlth CRAR (l:t)
rosP.ctlvcly. lf RtlD (CnARl, ÍElrS (7:9) ll drlvcrs .ra
enrbled. Dltl Ír rclcctcd er ln COx ?rblc 2.
CC trblr 2
UTA SSLEIIC

nU8

Gllt.!

Clllrl

Ctllr2

Clll-3

CRB (7:O) ll

T READI tr .

DOIIE ll

trAtT PEID
H

Ir|I L
CRIE (7:0) B CrcS IE ll
CRCS IE ll
CRD (7:f) H a
a

T IxT I i

CRD (?ct) f,

CRE (?:0) B

CRD (7: t) H

CRIE (7:3) ll

CRDB (7: C) H

2.2

RD III

IIALT ll
RD IX? INH L

CL()C!(S: COI{ lnputc 3 clocks, and outPuts onc.

A. tnput - n CLf L - Iotc: i CLI L ls received on tuo
r lgnal plns .
B. Input - D CLX EIABLE H
C. Input BAUD RAIE CLX H Thle slgnal is called BR
CLf H ln thc rpcc for shpllclty.
D. OuÈput - CON D CLK L:
D CLf L r t CLK L + D CLX EI|ÀBLE L
eOilDCLIL.DCLÍL

llt

2.t

f83O lflt k
rSE0 lrl? L lr . ïft tnput urod for
lnl Clel I zrt lon .
ftGlS?3f fCCtSEr tfrrrr .r. llvr reln rrgtrtorr tn thc
conrolr lncrrftcr chlp. ttrot .Í. srrcrtreá ln col Èblc
t. lhr Conrolr trltrtrr lddrcr trgtrtrr
lr .
tro blt r.glttcr urcd to rddrer thr lnternelíCnAnl
reglrtcrs.
It lr encoded .3 rhon ln thc ReglrÈer tddrcrs colrrn
ln CO trbtr 3.

2.4

GO ?rbh !

tEISttl DFtr
rEI'TE

nErstu rnt55

fffD/'nltt

CICER

Rfu

cRr

l,
ll

CRCSR
CER

Rfa

wll

Reglrt.r Accrrr (Gont.ll Four ICTRL functlons .rG
rrqulred to op.r.t. th. con.olo chlp:
I. NITE CRAR
2. mrtt (cnÀR,
3. Rt D (CRAn )
I. READ CRAR
llrr CR R lr r tro btt tr.n.p.rGnt latchr loadcd fror
IllfS<7:6) rlth Èhc lor pulrc of D CLr L tf rRItE CRÀR.
IÈ lr rcrd to IEllS (9:0) tf READ CRAR.
IClnt (5:f) f,, CIIP SEL L: ICTRL (5:0) H and CËlP SEL
L rro ??L lnputr ueed for control. A valld ïCTRL
functlon code lr dctccted er folloua:
UALID Ftn . ICTRL 5 L .AtfD. ïCTRL I H .ÀltfD. IíCTRL I H
D
'
'
rctng ,Ar .ArrD. cHrP tra ,,
Ttrc chlp funcÈlone arc decoded es shoun belor:

VATID ?I||

TCTRL 3 II

IíCTRL 2A

NOP

o
a

h'RITE CRÀR

I
I
I
I

t
0
I

I
133

Functlon

ïRITE (CitAR)
READ CRÀR
READ (CRÀR)

2.5

trrnrlttcr:
ttrc tr.nnlttcr
lr.
doublc buffcrcd
prrrllcl to rcrlrl lntcrftco.
ttmrittar Rcalrtcrr: lfrorc .ro tro rddrctlrblc
rcglrterr ln $ra tr.nt ltter.
l. C.onrclc ltrnrlttcr lutfcr Rcatster (eilRD . ltris ls
rn t blt d.tr rcglstcr lotdcd frc FllS(7:f).
t: ls
rrltc only urÉcr control cf FlnL (5:l) E erÉ'thc
CnÀR. lbc rcalrtcr lr lordcd rltb thc lou grlsc of
D CLT L.

2. Gonrole Trrnnlttcr Qntrol./Strtur hcAlrtcr (CIICSR).
thlr lr t tF blt reglrtcr rceemcd frc tbc nUS
undcr control of FlnL (5: l) f rnd tbc CR R. ft
cont.lnr rn lnÈcrrupt Errblc (IE1 btt (CtCSR<6>l and
. READT blt (CnCSR<?>r. IE ls REÀD./nf?8, end is
lordcd f rc IBI,S<5> ut Èh thc lor pulse of D CLf L.
READï lr rcrd only to IDIIS(?).
Itrnrlttcr OperetÍon: thc rrr.nslÍtter .ccepts t-biÈ
If tÍ)AD (CR Rt, tnd thc CRÀR
drtr Íror nUS (7:f).
polntt to drtr bufÍcr, tha drta ls strobcd fror thc IBUS
lnto thc Ctf rlth D CLf L. ltrls clrers Èhe READI
fllp-flop. tïrc rcAlrtcr frc utrlch thc drtr is rctually
trrnutttcd lr ertlcd tbc ltenslÍtter RcAlstGr (tR1. If
Èho Trennlttor Roglst.Í ls erpty, thG data is
.utoqetlcrlly trenrfcrrd fror thc gfE lnto thc t3, and
REI'ï ls r.t. If the fnterrupt Euble blt ln the CÍICSR
ls setr COX IXt [ 9.ts rsrertcd. ltrls causcs.n
lntcrrupt to rlgnrl thrt thc CTDB ls rcedy to rcccpt
.nothcr charlctcr. lïris lnterrupt lg clcered by vrltlng
r one to CSR<S>. Ihen thc tR ls loedcd, a countGr ts
Btrrtad rhlch controls ehlftlng thc deta out onto thc
Scrlal Out (SO) ltne. A one blt sp.cc ls shtftcd out
flrct (strrt bttl, then thc I data blts and then one
rark (sÈop btt). ?he shltt rrtG ls dctcnlned by thc
Êrcqucncy of the BR CLf U.
Transrlttar logtc: lhc Transrttter log lc ls deserlbed
ln Èhe follorlng sGctlons.
l. Tt CTR (3:0) H - IXIT TT CTR H
A. T'r CtR (3: t) ll I s a four bl t ripple eounter
clochcd ulth thc rtslng edge of BR CLX L.
B. TT CtR (3:3) B ls asynchronously forced to O if
INIT TT CTR I . l.
2. T CLK L, LD CLK L, tOAD CLtr H

l3a

A. T CLf L lr an lntcrnal clock slgnal. It ls lou
rhcn ?t Ctn (3:!) E - F and 8R CLf L ls lou.
B. LD CLf L lr an lnternrl clocl rlgnal. ft is lor
urreo ?f Ctn (3:f> tt - 7 and 3R CLf L ls lou.
C. IOAD CLf A lr t fft. output. LOAD CLf H . .NOT.
LD CLT L.

lC CIR (3: t) E:
tl CIR (3:0) Ë ls a four blt
rlpplc countcr cloclcd rlÈh thc falltng edgc of T
CI.f, L. lt le aslmchronously 8êt to E yhen IXIT TC
Ctn L tc lor.
CIN C?BE IX t - CI,X CTDAE DLï H:
A. CLR CiDBE IN L ts thc lor truc lnput to an cdge
trtggcrcd D flopr CLR CTIDE DLY H.
B. CLR CTDBE DLï [ ts clockcd rlth ÈhG rlslng cdge
of Llt eLf B. It ls asynchronously clearcd tf
nsEQ II|IT [.
T READï 8R 8 - T READï BR L:
A. T READï BR H lc an cdge Èrlggcrcd D Flop elocked
rlth the rlslng edge of LD CLr n. It la clcarcd
tf CLR CTEE DLI E. (TC CTR <3:0) H - E). It
le only sct tav:rchronoualy.
SET T REÀDT D-:( Ë . iSBQ ITIIT E + (TC ClR (3:C) H
.F) T.TCLtrL.
B. T READI 8R L ls a'TtL output, and equals .NOT. T
REÀDT BR U.

6. IilIT TtC CTR H: tXtT TC CTR H ls an S-C latch.
À. SET INIT ltC CTR H. (T CLf L . (TC CTR (3:0) H .
8t)
+ TSEQ IIII? H

B. Ctn IIIT TC CTR lt - T CLK L . (TC CTR (3:e) H E)

.LD CLTt'TREADTBRL

CLR CTDBE OUT H - CLR CTDBE OUT L

À. c[.R CTIDE OUT H ls a S{ latch bullt rlth r TTt
Èranacelver. SET CLR CTDBE OUT ll . LD CTI)B H
Cln Cln CTDBE OUT H . IISEQ IIIT H + t READI BR L
B. lïre lov truc outPut ls tvallable at the outPut
pln, CII C?DBE OUT L.

r35

CTDB (?:C) H:

CTIB (?:f)

H is tn cight bit
transparcnt latch. It ls loadcd trc IBUS (7:f) tr
opcn if LD CTIE H' rherc
rcspcctively. ttrc latch ts
t
. 0) . D CLi H
(CRARI
(CnÀn
LD CTID A - íRltE
9. lR (7:0) H: TR (7:3) H ls an clghÈ blt transParcnt
Irtch. It ls loaded fror CTDB <7:e> H resPcctlvcly.
llrc latch ls opcn tf IIIIT ï'rC CTn Ë ' T READY BR ll t

LD CLT B

10. frIT SERIAL OUT H: XiIT SERIÀL OUT tl ls a
trrnaprrGnt latch, ollcn if T CLf L ls hlgh. D.ta ls
sclectcd as bclot:
A. If IC CTR <3: C> [ . F . IXIT ïrC CTR L'
thcn nlt SERIAt OUT ll
B. If rc CTR (3) L,
thcn NIT SERIAL OUT H
tn <(TC Cln <2:9) H)> L

C. clee F{iT SERIAL OUT H <- 3
ll. SERIÀL OUT H: SERIÀL OUT H ls a TTL outPut.
SERIAL OUT H r .NOT. nIT SERIÀL OUT H
t REÀDY SfïC L: T READY SntC L ls a TTL input.
t REÀDï 1l: T READï H ls t trtnsPercnt laÈch' opcn uhcn
D CLt( L lg hlgh. The daÈa lnput lc ? READI SY|[C H. It
ls' asynchronously clcara tf CLR CTIrBE OUT H.
CTCS IE ll: CTCS lE H lg a trtnap.rcnt latch, open tf D
cLr H . ïRITE (CRAR) . (CÍIAR . 21 . Tlrc deta lnput ls
HBUS ,6 H. It le esynchronously clcarcd tf ilSEQ IIIT ll.
T Il{T H: T INT H ls e fltpflop sct ulÈh thc rtstng edge
It IS
T READT E Tf BÀL? L.
of CTCS IE H.
asynehronously clcared tf D CLK H ' I{RITE (CRAn) r (CRÀR
.3r.muse5H.

2.6

Recelvcr: Tte Recelver ls a double buffcred serlal to
parallcl lnterfece.
Rccelver Reglsters: tïrere are tuo addressable registers
ln the recelvcr:
l. Coneole Recetver Data Buffcr Rcalster (CRDB) this
Ís en o btt read only regÍster accessed frol thc
tdBUS. It contalns data recètved on the SERIAL IN
(SI ) I Íne.

136

2. Conrolr Rrcrlvrr Control./SÈrÈus Rog lrter (CrcSR) thlr lr . tuo btt rcglrt.Í rccetrod f ror thc Ígus.
IÈ cont.lnr en lntcrrupt Enrblc btt tnd r mXE blt.
IE tr READr/IRIIE, trÉ lt loedcd Írc ïBUS<6> rlth
tho lor pultc of D CLI L. DXE lc rcad only to
rEus<7>.

Rrcetvor Opcratlon: lÍ thr rocclvcr lr ln thc tdle
3t.t., rhcn Èh. SERIAL LIIE (Slt gocr fror r rart to r
t dlvldc by 16 Rcce lver tlrlng CounÈcr (Rt Clnt
lptcor
lr .trrtcd. lt lr lncrercrtrd .t thl frcqucncy of thc
brud r.t. CLI I rlgnrl. ltrc SI lr Ècetod to vcrlty.
velld rtrrt blÈ (rprccl.
If not, th. Rt C?R - tc
rr-lnltlollzed.
lÍ ye3o. lccond I b!t countGr,
Rrcrlvor Control Counter (Rc Ctnl , ll cnabled. Ttrlg
countcr lr lncretrnted rlth thc nogatlvc aolng cdgc of
ER CLf I each tlre thc RT CtR lg ln a rtctc of 15.

llrr tccond counter lc urcd to eneble, ln raquancc, ccch
of Èhc clght lrtch.s ln thG Rocrlvcr RegI8tGr. ïte
lrtcher .r. strobod aÈ thc c.ntGr of thc drte pulec .s
drtrrrlned by the tt.t. of thc RC CTR. sI ls tcstcd for
one rtop btt (rtrll.
IÍ eorrrct, tho data ls strobed
lnto Èh. CRDB, !rÉ the DOXE blt ln thc CRCSR ls ect. lf
cneblodl (1.c.1 tho IntrrrupÈ Dnablc blt tn thc CRCSR Ís
rrtl thc s.ttlng of DOXE rÍll gGncrally ccusc rn
lnterrupt. t|tlr lntcrrupt lc clearcd by rcadlng thc
CRD3. DOXE lr algo clearcd yhcn Èhc CRDB ls rcad. The
rccclvcr la lrrcdlatcly rcady to strrt acecptlng anothcr
character.

Recclvcr toglc: Rccciver loglc ts dcscrlbcd in the
follorlng acctlons.
RT CTR (3:9) ll:

Rt CtR (3: e ) [ ts a four bÍt r tpple
counÈcr, clochcd ulth thc falltng cdgc of 8R CLX H
unlcc R ERROR tl + IXIT RT CTR ll. lt le asynchronously
clcercd lf IIIIT RT CTR H.
RC CTR (3: t) ll: RC CTn (3:3) H t e r four btt r lpplc
count.r, clockcd rlth the falltng cdgc of BR CLK H if RT
CTR (3:0) . F.
SERIAL lll B: SERIÀL Ix H ls a TTL lnpuÈ.
ST DET ll lc a trrnaperGnt leÈch. IÈ is open if 8R CLK L

t R BUSI L. data lnput ls

SERIÀL

TN L.

asynchronously clcared tf IISEQ INIT H + R BUSY H.

R BIISY H: R BUSY H ls an S{ latch.
SET R BUSY H - ST DE? H r BR CLK H
. (RT CTR (3:e) B - 7l

B. CtÀ R BlrS H . SêRIAL IX H . R ERROR H + iISEQ INIt H
+ STOP BI? H ' BR CLN t
137

R ERROR ll is an S-C l.tch.
R ERROR ll:
SET R ERROR d. (RC CTR <3;)> H 3 El ' (Rt CTR (3:9)
U . 7l

. SERTAL IX L ' BR CLT H
B. CLR R ERROR H . RBUSï L' ST DEt L + iSEQ INIT ll
sïoP Bt? lt: sToP Blt n ir an s< letch. sET sÏoP BIt H
- SERIAL IX H . (RC Cln <3:t> - 8l . (RT Ctn <3:f ) ll 7l . BR CLI ll Ctx S1IOP BIT [ - R BllSï L + iSEQ IxtT H
Ct.R DOXE IX L: Cln milE IX L ls a ftL input.
Ct,R IDXE t[.I ll: CtI lptfE DLI A is tn cdgc triggercd D
fltp-flop cloclcd rlth thc rlslng cdgc of BR CLI H. It
is aslmchronously sec lf iSEQ IIIT H. lhe deta tnput is
CLR DOXE IX H.
FRIT PilL LOCI H: FRNf PtlL LOCI( ll is a TTL input.
DOXE BR B ls cdge trÍggcred to
JOXE BR H DOXE BR L:
Speclflcally, lt ls clcared ulth the
clcar flipflop.
risÍng cdgc oC. BR CLf H tf eLR DONE DLI H. lt is
asynchronousll' clcared tf FSEQ IxIT H.
It ls
asynchronously sct if
stcp BIT H . BR CLX l! . .lro? IHÀLT L . (RR (6:0) _ le
(]rEx) ) .
DONE BR L ls a TfL output.
FRNT Pr{L LOCK Ll.
CI.R milE OUT I is an
CLR mNE OUT H - CLR DOXE OU? L:
Speciticelly, it is
to
clear
fllpflop.
trÍ99er
cdge
clcarcd vith the rtslng cdgc of bR CLX B tf Ct,R DONE DLf
tl. It r ls asynchronously sct i f iSEQ INIt B + REÀD
(CR^R .O).CLR mND OUt L lc e TtL output.
(CR,Àn)
FRn ERR EX L: FRi ERR El{ L ls e TTL tnput.
llÀLT DET BR H: IIALT DET 8R H ls a TTL output. EÀLT DET
BR H r FRll ERR Ell H . R ERROR H + STOP BIt H t 8R CLK A
r FRN? PNL LCK L . RR <6:0) . l0 (HEX).
RR (7:C) H: RR <7:C) H is rn clghÈ blt S{ làtch. Ttle
letches are sct one tt a the.
À. If ST DET L' R BUST L'
.IOT> (S?OP BIT H' 8R CLr
H . DONE BR L) thcn RR (7:C) (- C.
B. If BR CLK ll . (RT CIR (3:0) . ?) t RC CTR <3> L t
SERIA- IN H then: RR <RC CtR <229> H>
CRDB (?:0) H:
CRDB (7:0) H ls rn eight btt transparent
latch.

r38

rf stoP ttt I . tR cLr n . DrE BRL

thon! CRf (7:!) f, <- RR (?:t) tr
DOIt Ef'rc L: DIE SïrC l. t. . ??L lnpur.

2.?

DII [: DIE f, lr r tr.nlp.r.nt l.tchr opcn rhen D CLÍ
t lr htgh. tttc dtte tnput Ír DOIE SïïC B. lt lt
rslmchronourly clerrcd lf CII mIE Oltt E.
CICS lE ll: CRCS U lt I tr.n.p.r.nt lrteh, opGn it D CLI
l|-._nl?t -íCnAnl : (CIAR-r tl. Dre Crt. lrrput lr rtts
a6 f,. It lr
rrynchrorpurty cierrod tf fSEe l'l!t t.
R IIt Ë: R II? É Ír I fltp-flop lGr rlth thc rtslng
oCg. ol CRCS tl f, . DOIE I It l|AL? L.
Ir ti
rrynchronoutly clcarcd tÍ fSEo IxtU [ + D CLR H . READ
(CRAn1 r (CnAn .ll.
InÈ.rruptr 3 B.lt loglc:
RD lX? fXl| H: RD IX? lXl| U ls a ftt. lnpuÈ.
eO IXT U - cOX IllT r-: COX tX? il lc r trrnsprrcnt
latch, thc output rtagc of rhlch lr .n olr!Ít coll.ctor
tr.ntcolvcr. COi II? L lr thc lor tru. output pln
rlgnrl. Th. er.--Íl lt op.n rhen t CLf t lc hlgh. ïÏrc
drtr lnprt lt R II? r + T txT B . RD tiT liln L.
Ë L? DtT SïIc f,: fAL? DEt SIIC H ls a ftL lnput.
IALI PGUD II: B LT PÊXD U ls rn cdgc trlggcrcd D flopr
clocted rlth Èh. rlelng cdgc of D CLI L. lf tlAl.t DET
stïcH B, thcn HAL? PEXD I ylll be sct. IÍ IRTTE (CRARI
. (CR^R . 3), th.n BAL? PtxD ll <- ïBUS a7 n + nÀLt DET
snrc H.

IXSTR FEttCll H Ír

e TTL lnpur.
SAYED lxstn FEtCll H: SAYED INSTR FEtCll ll ls rn edgc
D floP, eloclcd rlth thc rlslng edgc of i CLX
lrtggard
L.
Th. ílrt. tnput lc IXSTR FETCH H. It ls
IXSTR ?E?CH H:

rrynchronou3ly sct tt iSEQ llltT H.

[ÀtT ll: tLÀLT H lr an cdgc trlggercd D flop clockcd
rlth the rlslng edgc of t CLf L. It cannotr chrngc sÈrtc
unlrls SÀVED IXStt FEÍ\CI| H + HRTTE (CRÀR] 1CRÀR r 3) .
llrr deta lnput ls ÍSÀVED IXSTR FETCH H HALI PEND H +
WRITE (CRAR) ' (CR R - 3) ' HBUS ea Hl' . .NOT. []rRrrE
(CRAR, E íCRAR - 3i . HBus e6 Hl.
COX llAtT L:
CON lLÀLT L l s a TTL output, and equals
HAL? L.

r39

f,ALt LIGIIT L: BALt LIGllt L is rn opcn collcctor
outPut, ltÉ cquels f,ALT L

ltr<--- mrE sIrc L
rcrnt t [ --->tal
l?!<--> ctr DorE our L
L --->ta2
l6t<--- rctnL a H
rctnl' 5 [ --->tr3
ast<--- Fnn ERR EX L
rctnt 2 [ --->taa
L
alt---> t READI DR(x,t
cËrP sEL t --->rts
L
l3t<--> Clr ctrE
H^Lt DtT BR r <---tt6
a2l<--- r ct,r L
à?rE BR L <-->tt?
ll t<--> c(r Ir? L
FRm PrL Urcf, [ --->tat
att---> reus a9 Ë
sEntAL Ir u --->ta9
cÍx u)rE rx L --->tlt ...... 39t---> rBlts ft n
. Jtt---- GRolrD
t READï S!rc L --->tll .
UGA ----tT2 . LID . 37t<--- D CII ETABT.E II
rcc ----tl3 . D(ux. 36t<--- rclRL 3 r
isEQ lrlt

. 35t---- GROIf,D
.
r3ts 3, ll <-->tl5 ....... 3at<--- eLR CTIDE IX L
33r<--- BtLÏ rr StI|C f,
c(n D cLr L <---116
32t<--- rctnL I f,
rrttT rr ctn u --->tl?
3lt<--- i cLr L
8ÀUD RATE CLr ll --->tl8
3at<--> rBlrs a6 Ë
raus t3 ll <-->tl9
ïBus al r <-->r20
29t---> LOAD CLr B
2tt<--- lxstn FETCH ll
rttfs a2 n <-->l2l
2?t<--> C(f 8ÀLT L
rElrs t5 ll <-->t22
261---> llÀLt LIGHT L
rBus fa r <-->t23
25t---> SERTAL OUr H
rBrrs t7 ll <-->t2a
RD rX? IXH ll --->tll

COX FIGURE I

PIN COXFTGURATIOTI DIAGRAT ÀXD PITI TDEX?IFICATIOI

ltt

tr?3llott cctror, cttP (tn-ratrt
clrtrrL relt?ttcr

t. ll

thr lI? chlp FrÍorr3 y.r lout op.r.tlont rolGvrnt to lntcrrupt
proc..3lng, rp.cl f lcelty :
l. rtorlng .nd r.turnlng y.luG8 oI prrtt of thc PsL
(lSrCUnODtr?nnODErIPLl erÉ AS? lcvcl vle tlrc IBUS
2. r.c.lyÍng rnd rtorlng thc v.luc of tho XSIPR (f,lghcst
pend ln9
Softurc
tnt.rrupt
Pr lor I ty
lcvcl
Ílrqurrt./R.gl3t.r), rhlch lr urod ln lntcrrupt erbÍtrrtlon
3. plrclng vtrlour detr onto thc tlcrovcctor (UvEC?oR) llncs
l. portorrlng RtI chccl crlcul.tlont
5. erbltretÍng tntcrrupt r.qucrts, cncodtng thc ldcntÍty of
thc hlghcrt prlorlty rcqucrt (for output onto thc UIYECTOR
llncr), lnd gcneretlng thc Intcrrupt pcndlng sÍgnal, ft|T
PIE

rrbltrrtlng Unlbus rGquasts rlthln thc aroup of BR
devlc.3, lnd lttulng BGr (thur gr.ntl]rg tntcrrupt tcceas
to tho CPlf, thorryh .cc..a to thc Unlbug rust be furthcr
rrbltr.tod ln othcr clreultry crtcrncl to lxT)

lal

trt ttttl I
Pln ldcntlflcotlon rnd Getc ïYpc
I

IPII I I FII ID
l2
l3

CPI L
SP?I L

l5
l6
l7
l8
l9

rctnt 5 Ë

CDIt

I GAIE TTPE
GAITXF
GAITTF
GAITTF
GAITTF
GAI?XF

rCTRt I H

GAIIXF
GAI?IF
GAIÍZF

PTASEI rl

rEus 22 a
rDus 23 H
PNG IX IT L
rcTnt 2 á
rcTRI I H
rctnr 3 I
raus 25 H
mus'21 tl

lre

lrr

frr

lr5
lr6

fr7
lr8

GAITZF
GAITXF
GÀITXF

GAIIXF

GAITXF
GAIT|Z F

GAITZF
GAITz F
GAI?XF

mus 26 tr
TCIRL H
UYECTOR
' OH
UYECïOn 2 Jl
UYEC?OR I rl

ll9

l2a

l2r

122

f2t

GAITiZX
GAT?ZX
GAIT:ZII
GAITNF
GATTXF

U?RAP L

UYECTOR BRATCII H
DOSRY L
P?E CIIT OR PROSE H

a2r

125
126
127
120
129

mus 2f ll
raus lt ll
DCLT EX II

SLTXI IT|T L
rtus 19 H

l30

l3r

f3r

rzt t

132
133

c(niEms

I
I
I

f3e

I
I

GAITZ F

rDus l7 rl

mus 16 rl
I ncLr Ex n

136
137

I
I

GAITI{F
GAITXF
GÀ ITZ F

ECLT L

SïIICIIR RESET BG II
sBR6 ll

GÀITNII
I GÀITIIF

cerrzÈ

GAITZF
GAITZF
I
I

GAITNH

GAIT}IF

GAITNG

GÀITNP

lt2

IXT TÀELI I (conrt

Pln ldentt f lcatlon and Gate IYpe
I

IPIN I

PI]I ID

lrr

NPBG5 II

lr2

lr3

l.r

SBRI H

lr?

IXT PIIE L

lr6

laE

GAITTX
GAITNF

SBRs H
BPEGI II
uP8G6 rl

1.5

GÀTE TYPE I

colfiENTs

GAITTTI

BUS GRÀNT H

TITBR IUT L

lt3

GAITTï

GAITXF

GAlrtï

I
I

GAITTN
GAITNF

2.a
2.1

?rrtonracls
lnCroórEtlonr

Ororrlrrr ?lrr lI? chl p pcr Íorrr vcr lour oper.t Ion8
rrlevrnt to lnterrupt proc.3rln9, 3peelflcelly:
A. ttorlng rnd rcturnlng vtluet of p.rt3 of thc PISL
(IETCUilODE, nnODE,lPLl rrÉ AS? lcvcl vla the ISUS
t. rrcrlvlng rnd rtorlng thG yeluc oÍ tho USIPn (l|Íghesr pcnding
toÍtrrrr lnt.Írupt Prtorlty levcl Raqucrt./Rcgtstcrl r vhlch is
urod ln lnÈerrupt erblÈrttlon
C. plrclng vrrlour drtr onto the rlcrovrctor (UVECTOR) llncs
D. pcrfonlng REI chcel calculrtlont
t. rrbltrrttng lntàrrupt roquestr, cncodlng thc ldcnttty of thc
hlghctt prtorlty rcqucat (for output onto tha ttYECtOR ltncrl r
end gcncrctlng thc lnÈrrrupt pcndtng slgnal, IXI PIIDG
F. erbltrrtlng tlnlbur r.qucrts rlthÍn Èhc Aroup of BR devlccs,
rrÉ lrrulng BGr (thur gr.nttÍq lntcrrupt .eeasr to thc CPU,
Chongh .cco.r to th. ttrlbur rust bc furthcr arbltratcd ln
othrr elrculÈrtf .rternrl to IXT)
In tho Íotlorlng dlrcurrlonr of Ix? opcretlon, refercncc
occ.lslonrlly vlll be rrde to cpcrrtlon of other p.rt8 of thc
CCEI CPir. tlrc opcr.Èor (II? or othcrl rtll hopcfully bc clear
fror thr contort.
2.1.2 8ÈrÈr tlerentrr Ylrtour 8t.tc clcrcntr .rc uscd ln thc INT
chlp, rco lovel trlggorod, tolc edgc trlggcrod.
Sn latch.s rrc the tt.nd.rd cross-couplcd llÀllD g.tcs ui th

2. 1.1

lndependcnt S and R lnputt.

TrrnrprrcnÈ (or Tl l.tch.s end data (or D, latchcs trc
thror-getr lcvel-trlggrrcd dcvlcrs rlth tro clock lnputs and
on. drta lnptrt. Íhllt clockt orc dcerscrtcd' ouÈPuts (Q and
Ihlle clocks tre
not0l hold thelr Pr.vloue vrluel.
r.3.rt.d, Èhr lnput D lr fed through to the outPuts.
(Trrnrprr.nt l.tchGs havc both outPuts valld durlng clock
.3t.rtlonl D l.tch.r hrvr thc non-lnvcrÈlng output valld and
tho lnycrttng outPut forccd hlgh.l Skcu latchcs trc llkc D
or tr.n3p.rent letchcg rtth the clock tnputs rcvcrsed.
Ilrllc clockr aro t38erted, thc outPuts ray not change. tfttcn
input,
cloctr .rc dr-aucrtcd, the outPuts rtll follou theproblca
D. Sher lrtchcr trG uged to avold a Potcntltl
uhcrcby e drte lnput, Íntcnded to changG on a clock tratllng
cdgc, ley Chtnge t fer nrcc too soon bccausc of clock skeu.
lfre ghcu leÈch cffcctlvcly lockt out thls changc untll afÈer
thc tralltng edge of the locally avallcble clock.

ltl

tdgo-trlggrred ??t .rc ...tGr-tlrvc dcvlcor drorc outlruts
.r. hrld rhltr thr cloct lt dc-rrlortd. Ihllc thc clock ls
Irortodr tho ?? 3.tr uP tn r.ttDnre to thc drtc lnputr but
Ch. output. do not chrnge untll thr trrllÍng cdgc of thc
clocl.
2.1. t tlgnrl l-aa rrÉ Arortlon trrelrr tlrroughout thls docrlcnt,
thr Íollorlng loglcrl opcr.torr rtll bG uscd.
A. t+t
ort.
or 'C' Lant tloglcrl
t3'
t. ttpt'or 'AID'ttog
roana tloglcrt and'.
raant
lcrl ÍnYar3a'.
C.
In tho lntrrrrt of rlnlrlrltrg confurton ovcr truth velucr |t/?r.
loglcel vrlrrr ll/al , end voltrgc levctr (al/Ll , thc follorlng
cony.ntlonr rlll be ured ln thlr docrlont.
A. A phyrlcel rlgnrl n..c rtlt Íncludc a trrlllng ll or L to
tndlcrtc ltr volt.gc arertlon tcvcl. Thus UTRAP L ls
rlrertcd (t, rhcn lor, dcrgertcd (F) uhen hi,gh.
B erÉ L rlll b. ured onlv ln phyrlctl slgnal nrcs.
C. logtcrl yelrrt |l/al rtrcn rpplhd to PU,!,!gI slgnal nt cs
rllt tollor the yoltrgc lourl ruch thCE-T-corrcsporÉs to ll.
thur ttTRAP L r I lr ..rcrt.d (T),
' 8t
s Gntl|t B r I lr derrcrtrd (Fl .
D. loglcrl tlgncl n.t.f (ln logtcrl .quttlons) utll not have H
or L ruCflrrr elÉ rlll bc .racrtcd rhon l.
ll erecrtcd (loglcal
tlrur (UTRAP r notDSRY) r I rernt. lrtRAP
. Tl end DOSRY ts
.
r
phyrlcrl
UïIAP
L
t
lor
Tr
I
UttAP
i
r
phyrlcal
E)SRY L I t r
(foglcll
?r
TDSRY
!
not .t3.rted
ht9h. Frt l.e. thc logtcel lnverre of DOSRV, notDOSRY, ls
r3t.rtcdrl.?.
lnpuc rrÉ ortput Slgnrlrr
2.2
Chtp IIO Ptnrr l/O .lgnrll erc tlrtcd by ptn nrrbcr ln
2.2. I
ttrcy .r. rhorn hrrc aroupcd accordlng Èo
IXT- ?eblr l.
.r. toto Polc unlcss othcrulse
OrtPuts
functlon.
Scc follorlng Pare. ?:2.? for stgncl
.P.clftrd.
dercrlptlonr.

l{5

relevant

!ê.

nate

scct lon (s)

I
I
I
I
t

BCtT L

clocks
clocks
clocks
clocks
PSL, UVECTOR, REt, lntpts,
8us Grant

PHÀSEI H
ilCLT EN H
TELT EN E

ICTRL (5:C) H

l,/O (3-stt

IíBUS <26:22> H
l{8US <2e : 16) H

I
DOSRV L
T
UTRAP H
PIE CUT OR PROBE
T
O(3-st) UVECTOR <2:C) H
I
SPFI L
rEI L
I
I
CPI L
T
CDT L
I
TITTER INT L
I
SLI]IE TNT L
SBRT H
I
sBR6 rl
I
SBR5 B
I

uv8cToR
UVECTOR, intpts
UVECIOR, lntpts

Irlo (3-8t)

UVECTOR

lntpts
tpts

lnÈpts

I n ÈPÈs

UYECTOR 8RArrcH H
PRC INII L

lntpts
lntpts
lntpts
lnÈpts
lntPts
lntpts
lntpts

IM PIDG L

lntpÈ pendlng

SIïC8R RESET BG H

8us Grant

T
T

o
o
o
o

PSL, REI
PSL, REr

tnÈpts

SBRI H

Bue Grant
Bus GranÈ
Bug Grant
Bua GranÈ

BUS GRÀXT II
f,P8G6 tr

BFGs B
BPDG' Ë

I.B. Ttc ebovc elgnel nrGt trG Èhosc ueed ln the I1{T chlp dcstgn
rnd arc rhllar Èor but not nccerearlly ldcntlcal to, the nanes

asrrrcd by othcr C(nEl chlpr or cÍrcultc.
2.2.2 Slgnrl Drrcrlpttonrr
Clockrr BCttr L lr tho berlc .yttcr clocl. Itg perlod
lt t rr3.r duty cyctc lr rPprortratcly 351. troet stttc
ot.ront. (??rl cblngc on th. tralltng cdgc oe BCLK.
?ranrlnrent latchor ar. entblGd dur lng BCLI(. Skeu
laÈchor trc dlreblcd durlng BCLI.

ra6

r aquàre uavc wtrlch changes stàte at the
trallÍng cdge of ECLK (+/- a fcu lee of neêc because of
propagaÈlon delays, etc. ! .
;CLt( EN lt 1s used to crcatc iICLK (thc nleroseguencer
see
clock) froo BCLK. iCLl( nornally (unlesg gtllled
sectlon) has trlcc Èhe pcrlod (2tl and half the duty
cycl c of BCLK. An Í{CLl( pul sc occurs at thc cnd of
Thercforc l|CLK Et{ H (uhen
PllASEt H dcagsertlon.
prcscnt) spans the lor to hlgh ÈranQl tlon of PlLÀSEl H.
DCLK EN H ls used to crcate ELK (thc deeÈlnetlon clockl
fron 8CLK. DCLK tlnlng rclatlvc to BCLX and PHASEI lg
the a.nc rt thtt of ltCLl(. IELI( ray alro be stal led,
durlng e 'dcgtlnatton lnhlbltr opcrtÈlon.
Flgure I shovs the relatlvc Ètllng of thesc clock
'
slgnals.
DaÈa operttÍong rrê typtcally perforncd tt Èhe tralltng
(rÍslng) edgc of ELK L. Control oPerattons typlcally
occur at the tralllng edge of iICLK L.
PHÀSEI H ls

-->l

| <--

T ns

BCLK L
PIIASE

t-T

I H

l,lCLK EN F-t'ICLK L
DCLK EN

-T

----r-]-

tl
tt

ÍELKr T

-[:r-

INT Flgurc I - Ttatng Dlagraa (Clock Stgnals)

IIBUS/I|CTRL: the WBUS lg

r tr l-gtate daÈa bus used
(hcrel to vrlte data reletlng Èo CPU gtatuc lnto and out
of certatn stttur rcÍttstcra on thr tNT chlp. TGn of thc
ïBUS llnce arc ugcd by thlc chlp.
ïCTRL ls a rlr-llnr conÈrol f lold. Tlrolo codcs to uhlch
If,T rrrponde (coaaandr to rredlrrttr !t!tus data frol./to
thc WBUSr Èo trruo r tfnlbur Grent, to plrcc r.sult! of
rn REI chock onto thc UVECTOR llnccr oÍ to placr ccrtaln
strtus datc onto thc UVECTOR llnrel rrc cnulGreÈGd ln
gactlon 2.4.

tt7

Scrvlcc Slgnals: INT responds
aGrYtcc./statur algnals ag rcll-

var ious

other

DOSRV L

slgnale harduare scrvlce conditlons of such
thlngs aa rrlthrctlc traps, lnterrupts, cte.
UTRÀP L lndlcatcs that Èhe hardrarc ls servictng a
rlcro-trep condltlon.
PTE CUf OR PR(FE Ë lnd leaÈce thaÈ one of those tro
opcr.tlons le belng lrrforred.
Ell UYECTOR H (not uccd crplteltly by ILT chlp) tndleates
that the hardrare ls rcadlng the UYECTOR llncs, bctueen
laero-lngtructlons, for PtE CEECI or PROBE, UTRÀP, REI
chcckr or lntcrrupt.
BUT ttYECtrOR H (not used by lllt chtpl lndteates thar rhe
UYECTOR Itnes rra bclng rcad durlnq an lntcrruptable
lacro-lngÈructton ífor lntcrrupt sGrvtee) .
UYECTOR BR nCB H lg thc OR of tbc abovc tuo slgnals. ft
Indlcatcs ÈhaÈ thc rlcro-vcctor llncs arc bclng readr
and togcther rlth aorG othcr stgnrls (acc aectlon
2.?.71 lndtcatcs that thc hlghcst prlorlty pcndlng
lnÈcrrupt le bolng proceascd and thrt uG rry cleer thc
corrctpondtng lntcrnal lnÈcrrupÈ lateh, tf thcre l8 one.
Interrupt Slgncle: Var lous
other
slgnals
lnterrupt
relate
to
rcquGst/eervlcclstatue
proeceelng.

SPFI L (Synchronlzcd Forer Fall Intptl

ls t rGquest for
lttls
tPPe.rB
and ends
IPL
I
E.
requatt
.t
lntcrrupt
rn
tClir
lt
la
latchcd
Ínternally
cdgc
trallÍng
of
rt thc
to producc SPFIR (SPFI Roqucetl .
fEI L ÍIrtte bus Error Intptl ls a rcqucst for tn
lnÈrrrupt tt IPL lD. tt appcers tÈ thc tralllng edge of
BCI,tr end cndr eÈ thc tratllng edgc of thc nert ;CLK, lt
ts latchGd lntcrnally to forr fEtR (t|EI Rcqucst).
CPI L (Cachc Parlty Intptl Ís a requGst for an lnÈerrupt
.t IPL tB (to log Èhe cache pcrtty crrorl. It tPPc.rs at
thc tratllng cdgc of BCLI and cnde at thc tralltng edge
of the ncrt ICLI, lt la latched lntcrnally to forn CPIR
(CPl Rcqucst) . ÍNote: VÀX-LlnsC rt I I have tht s I lne
tlêd hlgh (ttlcebled) . I

la8

CDI L (Corrceted Data lntpt, is t rcquest for an
lnterrupt at IPL lA. It appcars at the trailtng cdge of
BCLK and ends at thc tralltng cdge of the ncxt iCLX; lt
ls latchcd Íntcrnally to forr CDIR (CDI Requcst).
TIIIER IlfT L ls a request froa thc Íntcrvtl tlrcr for an
lnterrupt tt IPL 18. It reralns asecrted until the
tllcrrs sÈatua rcalsters arc rcad durlng the scrviclng
of thtt tnterrupt and thus necdg not be laÈched ln the
ItrT chlp.

SLINE INT t ls a requGst fror one of the tuo serlal data

It Èoo relalns
Itncs for en lntèrruPt at IPL l{.
asscrted untll tt Ís servÍced and thus necds not be
Irtchad.
SBRT H thru SBR{ H (Synchronlzed 8us Rcqucst n) are
requêaÈs, fror devlccs on thc Unlbus, for usc of the
tfnlbus end for Proccasor interruPts !t IPL l7 thru I,l,
Ttrcy tPPelr and cnd at thc tralltng cdge
reqpcctlvely.
of -iCLK.
PROC INIT L (Proccesor IntÈlalizGl ls an lnput sÍgnal
(gencratcd ertornally upon dccodlng thc relevant Bus
l\rnctlon codcl lnd lcatlng thet al I lntcrnal reg Ísters
chould bc lnttlallzcd (clearcd).
lg uccd Ín clcarlng lntcrnal ÍnterruPt
latchcer 13 dcccrtbGd abovc end letcr ln scctlon 2.7.7.
IxT PilDG L (tntcrrupt Pcndlngl tg !n outPuÈ lndlcatlng
to tho lntcrruPt handl lttg hcrdrerc/rlcrocodc that thcre
lc an tnÈcrrupt (at a lcvcl htghor than thc currcnt IPLI
rclttng to bc procclscd.
UVECIIOR BRÀllCH H

8US GRÀNT H ls

tn outPut to thc ertcrnel Unlbus
arbltratlon clrcultry lnetructlng ÍÈ to lssuc t grant
sÍgnal (BGn) rt thc hlghcet pcndlng r.qucst level (BRn),
.a soon ta the Untbuc bccoreg free.
HPBG6,5, I H (Hlghcst Pr lorlty 8us Grant D) r together
uÍth tha lnput slgnal SBRT H, ldcntlfy the hlghest
pendlng rcqucst lcvol. orrly onc of the four slgnals
(correepondlng to the hlghcst rGquest level1 rtll be
asscrted.

SYIICHR RESET BG H Íe an lnput slgnal fron the erternal

Unlbue arbltratlon loglc lnstructlng thc tNT chtp to
elcar th. 8US GRÀNT slgnal. Ttris rcsot slgnal rppears
synchronouely ulth thc flrst BCLK Èratllng edgc afÈcr
the start of WAIT (XAIT . SÀCK + IrqTR froe the Unlbus)
or thc cnd of thc 5-to-lt usec. SACtr tlaeout, uhtch ues
started rt thc lsaulng of thc last 8Gn.

lr9

2.1

latrrarl Clocl Etgnrlrr Input cloct tlgnrl ?f,ASEl I tr
hÍgh durtng th. ftrrt hrlf óf rn rclr ótclo. Eltlrnrl
tlrrr could crureEdgc of PË sE r f, tt bc reen rt lrt
boforc thr erÉ oÍ ICLI. SPf,l X (synchronlzod PHS3I ID
g.n.rrtrd lntornrlly f rot pIAsEl x rnd
Ifr-rlgnrl,
lCLf, rhleh rlll chrngr rtrt. no rooncr th.n tF 9.tc
dclryr after tho tretlln9 cdgc of lGLf, L.
làcrc thlng rclrÈlonrhlps rre rhout ln IIt Íigure 2.
-->l t25 nr l<--

ECIT L
PtrÀSEI B

SPOI H

iCLT L

DCtf, L

trff

Er-

fXT Flguro 2 - ttrtng Dlrgrcr (Cloel Dltgrtrl
2.4
2. a. I

nUS/'fCtfL Ogrr.tlon! (toedÀrttr ?SLÍ :
lrhvrnt Slgneh:
--

ICTRL

6 llnrr

lnpute

lf llncr
1/o 3-et
trg lrtor. on Ghlpr corrotp. nUS (P8tl bltr
2. a.2
26
lblt
rs
\
252 2l
ctltoDt 2 blte I Perr ot
23222
lnnoDt 2 btrr I PSt re9.
2f: 16
5 bltr /
IPL
muli

AETLYL (AEr bVcL I

llSltn íBlgh..t Eoftuerr lPo)
tMtn (b.t gr.ntod lfntBus tPR)

3 blÈr 26:21

5 bltr 2t: 16
5 bttq
2f:16
(Àfl r.gttÈ.r. con3ltt of ÈranrpercnÈ lttchcs' crccpt for
CUnODl, ràÍch urc3 edgr-trlggered F?rl .

ttt

2.a.t

flfs Ogrrttlonr:
gcncr lc

w
I

35
TD

I
I

o
o
2. a. a

2. a.5

2.5

I
o

rcrerls

functlon

r3?
33

(using l, btts of IBtfS)

PSL <- IBI'S
PSL -> ITUS

PRGODE <- IDI|S <23222>
<- cunnoDE

mnor

th.n IS/ClniODe <- IBI|S <26:21>

IPL <- nUS (2t:t6>
AStLYt <- IEIIS <26:21)

ASTLYI. -> IStS <25:21)

ISIPR <- IEI|S <2!: 16>

.PtPR -t *T

<2t:16>

(tee .lto acctlon 2.7)
(rcc elso scctlon 2.tl

end tssuc Bur Grant

Othor rctnL O;rnttonr:

(sec aGctlon 2.S)
Bus Grant
33
(scc acctlon 2.61
REI checl
37
lC
ISr/ClnfODe -> UVECITOR llncs (cce scctlon 2.5)
OprntloVtblng: thc IC?RL code I c rcad lnÈo
trrnrptrcnt l.tch.! durlng SPtrf -rl .trcrtton (thc f lrst
halt of .n fCltrr/Etf cyelcl , lnd lrtched durlng SPtrt L
IrtGrtlon (th. rocond helf). Dttl 8tecrlng rlgnels .ra
d.c. dceodcd fror thls letchrd ICtnL codc. For
op.r.tlonr rcqulrtng outPut onto thc IBUS, thc
(.trl-rt.tc) erG cnebled
epproprlrte mUS trrnllttcrr
dorlng SDAI L. ?or operetlonr rcqutrlng lnpnt fror thc
IBUS' thc rclcvent IBUS rceclvcd rlgntlr .r. rced lnto
tr.ntp.rcnt l.teh.r (.rcept CIRIODG -- reG belou) on thc
n.rt ELI f, aelortlon, uhleh rlll oecur torards thc cnd
oÍ SPBI L. (Slrllrrltrr' rhrn fClnt . 35, PRHODE ls
lordrd fror'CUilODE on r ELfs CURIODE odgo-trlggcrcd
P?r do not changc untll thc trrlllng cdgc of ELtr.)
UYE!il Oporrtlonr íoutpuÈ.!
IllT plaecs onc of I data
Iterr onto thc UYECTOR llnor:
À. Iothlng (ht9h lrpcdencc)
controllca by
s

rtaÈur./rcrvlce rlgnale.
D. RrgulÈ3 of RtI chrck (, R2 Rll controlled by HCTRL.
C. IS./CURiODB (lS CURI CURII - controltcd by ICIRL.
D. (lrtch.d, UVECIOR lnt.rrupt Codc - dcfault.

t5l

2. t.1

loleleoÈ tlgnrlrr
1

felfL
6llno
lnputt
UUEIC t I lnrs
ouÈprtr, 3-rtrto
DSfY t
fror OnfZ
I|tiAP L
frc rlGf?
Pl3 CII OR nOl I
fror tICrT
2.J.2
legtrtrr. on 6lp:
ts
lblr
\
crmoD?
2 bltr / prrt of PSt

2.5.3

Ioto thrt ll? drlyrr only 3 of the I CCBI llcro-veetor
Itnrs (beceuro of ptn thtt.tlonst.
Ihen IIt rararGr
UlítCfn (2tt) f, UYECtm t X rlll b. drtvcn by other
CCBI elrcul Èsy, to thrt UYICAffi (3:f ) ytll not br
lrblgrnur.
Oprnttoarr tf PIE Cnf or PR(38 r) dtsablc ttyECTOR
outputs íhlgh lrpedanccf
or tt (UtnÀP 3 tptUtSRY, r) dttablc UVECttffi outpuÈt
or tf IC?RL . 37 (REI chcctl r) a Rl R2
I lner

or lÍ fGtRL r lt
oÈhrrrl sa
tC IIT PXE r)

UVIC -> UYlCttm llncr

(roc rocÈton 2.6,

IS./CURiODG -> UVECTOR llncc

(roc rctlon 2.7.al

lf not(IIT FXE) r)
fakr ttYIC (ff f l -> UVICIOR I lnce
(pcrforred ln prlortty ehornl (BCG elro coctlon 2.8.61
IOTEr il)SRY alrrya ctutra UTRAPT
Ihcn taktDg aD lnterrupt bcÈrrcn tnctructlons, thc proccsaor
lsgucr DSRY s UYECltffi ERÀrcE f, at thc thc lt rcade thc tryECTOR
I lnel.
[rsn taklng rn lntcrrupt rtthln an (lntcrruptablc) tnstructÍonr
Èhr proc.aaor docr not lreue DOSRY -- sGa aactlon 2.7.7.
tlrlngr llie lnput control etgnale (WCTRI and the 3
2.5.4
tervlec/.trtut rtgnalr! changc et tho tralllng edgc of
nCl.f,. fny n.ce3lrrtl calculatlone (o.9. REI check) and
deta rrttchlng rrc thcn pcrforrcd. Írc alcrocodc usGg
Èh. It|ÍlCfin llncc by branchlng (BtlTÍngl on Èhcl at thc
ncrt rcLl.
Ecceure of tlrlng congtratnte ertcrnel to If,T' rny
rlcro-codo brench on UVECTOR llnee, ulll occur Ín an
c1rcle'(trCÍ.f lg stallcd T DBr rlth PtlASEl
'rttrndcd
dratrertod, untll thc tlrc of Èhc cnsulng BCLtr).

t52

?.6

ntr cbocts rx? pcrforrr p.rt of Èhc calcul.tlon
rpoclllrd f9t thr vtr REt (Rcturn fror Erccptlon or
rnterrupt) lnrtrrrctlon (cf . yAx sRt rectlon 6.i3 or vAx
llnta Arehtt.ctur! ttrndboot yolrrc ecctron 12.91 ln
r.tpont. to th. YAr-ll/75a rtcro-codcI REr
checl coland.

2.6. t

RolcvrnÈ Slgnrlr:

ICTRL 6 llncr
tnpute
IwECTOR I llnre
ouÈpuÈs, 3-et
I8US
l, llncs
lloo 3-gt
2.6.2
Rrglrtrrt on Chlpt
IS

crn íoDE
IPL

I blr

2 blÈg

ÀSTLVL

p.rt of PSt
5 bltr /
3 bltc

2.6.3

Oprrrtton:
A. contlnuourty calcutctr Rl . [cavcd pSL<tS>.Ee.0l E
lrevrd PSL<CUilO*>. GE.AS?LIÍLI
(XOIE: CIIIODE hrt 2 blÈr, AS?LW hac 3i rhus ÀStLyL nSB
(ÀS? 2, rust br !

to s.t Rl ro t.)

8. contlnuously calculeto
R2l . [ravcd PSL<CUilODE>.Lt. FSL<CUE|ODE>I
R22 - [tavrd FSL<!S>.t0.tl t [PSt<IS>.De.tl
R23 . lravod PSL<!S>.BQ.ll s lravcd PSL<CURilODE>.IE.0t
R2a - lHvcd FSL<IS>.80. ll f leavod PS!<IPL>.EQ.tl
R25 r [eevcd PSL<IPL>.GT.tl O lravcd PSL<CURIODE>.XE.gt
R26 r [eevcd PSL<PRUODE>. LT. Irvcd PSL<C|fiIODE>l
n27 . [cavcd PSL<IPL>.CT.PSL<IPL>l
R2 r R2l + R22 + R23 + R2t + R25 + R26 + R27
thcrc PSÍ.<f> Ís t,hc I rcglsÈcr of cecÈlon 3. 3.6.2 and saved
PSL lr on thc ïBUS (ln thc posltlon corrcapondÍng to lts
posltlon ln thc PSL -- cf. rcctlon 3.3.1.2,
C. tf ïCtnt - t7 (hcr1 r) do thc follorÍng:
el rcloYe UYIC fra UVDCTOR llncg
bl put Rl and R2 on I lncr iIYEC1TOR 0 H and UVECTOR I H,
rGrpccÈtvcly, put t on llnc UV8C?OR 2 n

r53

2.6. I

tlrlngr ' llrc valuca Rl, R2l Èhru R27. and R2 are
clntlnrrculy calculatcd fror Èhe lnput rlgnals froa thc
mUS rccatvcr gatcs and thc PSL and ASTLVL latcheg.
latches stablllze (durtng Spilt H) and
!f!c^r
_nCltr, tfCTRL
a R2 Rl
arc placed onto the UVECTOR llneJ. àfrer the
nart HCLI rcade thc nexÈ nlerq-code Ínstruction, the
(prcsrrably, dlffcrcnÈ Hcrf,L codc eauscs o R2 Rl to be
rcrovod.

2.7

Intrrrupt Arbttrrtlon (IXT Pnrc gcninl and Grentlng:

2.7. I

Rrlovent Slgnrle:
IPL
IE
ID

l8
IA

la-r ?

I,/O narc
I
SPFI L
cynchr porcr fatl tntpt
S
ITEIT
vrlÈe êrror lnÈpt
S
ICPIL
cachc parlÈy tntpt
S
TCDIL
corrcctcd daÈa lnÈpt
S
I
TITER IIIT L lnterval ttrcr Intpt
e
. e
T SLIXE IXT L scrlal ltnc lntpt
I
SBRn H
synchr bus req.
& e

IXT PNDG L

thcrc are Èuo serlal llncs (TTï, casaette, i thêtr lnterrupts
'
rlll bc ORcd togcthcr ertcrnally to INT
t -- t rulÈlproccasor, tf prcaenÈ, ulll hang on one of the BR
I tncc
S BeG para. 2.7.3 -- rusÈ latch
Q acc para. 2.7.3 -- strÈtc
Rrglrtera on Ghtp:

2.7 .2

IPL

IE
ID
IB
IA
Ol-tP
C'-I?

SPFIR
TEIR
CPIR
CDIR

EslPR
IPL

(f btÈ,

(r btrl
(f btÈ)
(f btt,

latch f.or SPFI
tatch for rEI

latch for CPt
latch for CDt
hlghcst goftrarc IPR (5 btts)

Ttrc flrgt

four rcgÍeterg arc SR laÈches.
(clockcd, trrnsprrGnt letches.

l5l

lte last tuo are

trtched rrÉ StrÈlc rntrrruptr: pour inputs (spFr. Í.et.
CPI ? _
beg tn !t a BCLI (tCLt, Ín thc c.sc of SPFI )
-CDI I
edgc
and crÉ rt thc nGrt iCLI trailtng cdge.
lrafllng
Sly
tr. thur prG.Gnt for only T or Zt nsce (tÉru onc
rcLfl and rult thercÍoro bG latchcd tnro l-bit SR
l.tcher (sP?IR, IEIR, cPtR, cDIRl.

2.?.3

ï\ro lnputs (tIfER lXT, SLIXT lX?) erc static and nccd
not be latchcd. sl.rxe rxr bca lns rt an ncLr tra i I lr.9
.dg.r TIIER IXT bcalng at a ELï tratf tng edgc.
lhc four sDRn corc fror crtcrnrl rynchrontztng pFs ytrlch
rr. clochod on thc tratllng cdgc oË iCLK.
tlYrc lr_tl9rr.nt!: ttrc wrc (uvEcroR rnrcrrupt code)
ldrntlfler tho htghcrt prtortty tnterrupt raqucst
Prcacnt. rt lr d.c. cncoded fror thc tntcrrupt inputs
and ls latehcd (lnto cdgc-trlggcrcd FFS) on an iCtX
tralllng cogc, to store thc tArcneO UVIC, vhleh ls
(rorctlrcsl placcd onto thG uyEc?oR llncg. (shtlarly,
lntarrupt rcqucstr arG contlnrrcusly corprrcd vc. currGnt
IPL to produec thê lntcrnal slgnol IlfT pt|DG ,r, yhtch ls
latchcd lnto rn edgc-trlggercd FF an each ticLr trelllng
cdgc. tAtlCllED IXT PilDG thus corrcsponds to ÍATCHED
WIC. the II? output rlgnal ltl? PilIE L ts acÈually thc
IÀTcllED verltonr ro thet lt corresponds to t-A$cllED-uvrc
on tho UYECIOR lÍnos.!
Thc I'IVIC voluqs rrc aeslgncd to lnterrupt requesters in
ordcr of [PL, es lndlcated hcreiq.

2.7. a

uvtc

!PL

IE
ID

IB
IA
IE

SPFIR

rEIR

synchr pouer fail lntpt req

llr

ll9

tel

CPIR
CDIR

loe

lntcrval tlner lntpt
clI
(any
SBRn
lt-17
bus reg.
onê asserted) otg
ll
SLIXE IXT ecrlal I lne lntpt
eel
IISIPR (non-zcrol
0l -0F
oeg
eo
no lntcrrupt request prcsent
ooe
ttre Inte rrupt Proccduror Onc o r to re o f the l0
2.7.3
hardrare tntcrrupt llnce ray bc rsserted, or there nay
bc a softuarc lntcrrupt rcqucst pcnding. ltre nlcrocode
kceps Èrack of softuarc lntcrrupt rcquests and keeps the
IlfT chlp lnfoned of thc IPL of thc hlghest one pending
by rrttlng lnto the HSIPR.
flthin lNT, thc Ídentity of the highest level interrupÈ
rcque8È ls cncodcd .s the (latched) UVIC, uhtch ls
ltte UYIC value ls established
updated evcry iCLi.
TIiER IXT

155

2.7.(5

lndcpcndently of the currcnt IPL (so thrt thG
interruptcr indicatcd by thc UVIC ls not nacess.rily at
a hlgher IPL than thc currcnt progrul . If thcrc is .n
lntcrrupt rGqucst at e lcvcl htghcr than the prE3cnt
lPL, ItfT PIIDG L rlll be asscrÈGd. (Sirilerly to IAItEED
UYIC, IxT PI|DG L is updatcd at each iCLf tralling cdgc.)
Other COIET hardyarc chccks IXT PXDG bctveen
.tcro-lnstructlons, and thc rlcrocodc chccks lt during
lnterruptablc lacro instructlons.
fn clthcr eese, if
IxT PilDG ls asscrÈed, thc ricrocodc rlll branch (Btttt on
thc UYECTOR llncs, rhleh rill b€ Índlcatlng the tÀtt[ED
UV!C, to r rlcro-eodc subroutinc that rÍlt proccsa the
indicaÈcd tntarrupt.
Àll lntcrruptcrs are uniquely ldcntt f tcd by Èhe (IYIC
rlth thc êrcaptlons or llrlbus rcqucsÈs ena softuarc
lntcrrupt rcqucats. In thc easc of thc lattcr, thc
ricrocode elrcady lnors the IPL of thc hlghcst panding
sottr.rc lntcrruptr so thet lf IIVIC - OlJo Ít knors rtrat
to do. If (aftcr sceing IXT PÍ|DG! thc ricrocodc secs
UIíIC 3 íeLa,- lt ytll ordcr (vla ICTRL 3 33) the issuing
of a Bus Grant rnd ulll rcad thc IPL of the grantee fror
the LUBIPR (vla the HBus), às dcscribed in sectlons
2. {. 3 and 2. Í1. a.
ArblÈrrÈlon,
UVIC Calculation:
fhe elcven lnterrupt llnes/lnternal
rctÍt I sters (al I oC yh lch change statc on rn trcLf (or
DCLI) tralllng cdgc) rre contlnuously ronltorcd to
cotputê the lnterrupÈ code, uhtch Ídentlfics thc htghcst
pcndlng lntcrrupt rcqucst, rcqerdlcsg of rhether or not
its level ls hlghcr than thè currcnt IpL. llre corputcd
codc is then loadedr àt each iCLf tratling edge, into.
reglstcr of edge trlggcred FFs, uhosc óutput is the
,.

IATCHED UVIC.

rf none of the hlgher prlorÍty tÍyDcroR op€rations is in
effcct (sce scctÍon 2.5.3), rnd lf ll|T PNDG ls assertGd,
the tarcHED uvrc ls placed onto the u/EcroR lines. But
if rlfr PNDG Is not àsserted, thc default value gr0
(untbus Interrupt request) is placed onto the uvEcroR
lÍnes, for reasons diseussed ln scctlon I under .fake
g ran tst .
IilT PNDG Calculatlon: The ouÈput signal INT PNDG
slgnl,fles that àn inÈerrupt raquest iê present at a
l9y:l htsher than the current rpL. For lnterrupters
uf,th codes other than ooo and ole. a coebinatórial
functlon of (unlatched) tnterrupt code and rpL easily
deterolnes rhether rNT PNDG should be asserted. Fol
codes ego and grg Èhe procedure is nore coaprlcated.

ls6

lfic valuc of tfBIPR<I: 0) (ealculatêd as per section
2.8.3, ldcntlf lcs the IPL of th. hlghcst pcnóÍng BR. ttre
drfaul t val uc (ut th no BR prcsGnt) is iIBIPR(I: C) - CO,
rh tch lookc I I kc thc-bnl chcod lng. Houcvcr , thc s lgnal
tFI (. SBRT + SBR6 + SBRS + SBRI) lndlcatcs the presence
of. real BR, so th!t a logtc funetlon of tBIPR(l:0)'
IPL, and UB I dctcrr ines rlrcthcr IllT PIIDG should be
asacrtcd for ! unlbus rcqucster. (lfote that this
functlon ls lndcpcndent of U\|ECTOR lnterrupt code.)
A 5-blt rignltudc corparetor ls uscd to corpute the
log lc functlon (HSIPR .GT. tPL) , rhich dcteraines
vhèthcr INT PNDG should bc assertcd for a softvare
(Aga tn thÍ s functlon ls
lnÈcrrupt rcqucBter.
lndepcndcnt of UYECTOR lnÈerrupt codc.)

2.7.7

?heae caleulaÈlons arc done using thc unlatched
tnÈerrupt coder Bo Èhat the next llcLt( Érailing 6ATfÏ
laÈch iIVIC and the correspondlng INT Pilm value at the
Itle ttte.
Clcrrlng Intcrrupt RGquGsts: Each of Èhc four latche.l
lntcrrupÈ rcgiaÈers (SPFIR, líEIR' CPIR, CDIR) nust be
cleered rhen the corresponding lnÈerruPÈ is taken. Ttle
readlng of the UVECTOR I lnes ls slgni fted by the
TttÍs
rsscrtlon of Ínput slgnal UVECTOR BR NCH H.
readlng rlght be for onc of the folloulng reasons
UTRAP, PtE CHECK OR PROBE' REI CHECK (slgnlfled by I{CTRL
r 3?l , IS,/CUR (slgntf led by ICTRL a le ), or taking an
ltlus thc lntcrnally genêÍated slgnal uv
lnterruPt.
INTPT I UVECTOR BRÀI{CH t NOTUTRAP t NOt (FTE CHECK OR
PRGE) r not(SEdD REI) t not(SEr|D ISlClrR] signif les the
Èaklng of an lnt€rrupt.
Bccause the UTRAP slgnal ls valld only aÈ .rbout Èhe tine
of trCLK, ue rust do ÈhG condltton checklng and latch
clcarlng aÈ Èhat tlrc (cLR IIT la$cHES H - tcLK ll & uv
INTPT Ht. The cLR lt|T IATcllEs H pulec Ís steered Èo the
corrèct lttch by the current value of (latched) UVIC'
rhtch ldentlfles thê lnterruPt belng taken.
Slncc these lttchês are cleared durlng IICLK' and their
respcct lve satÈ lng lnputs end aÈ IíCLK (cf tect lon
3.3.7.31, ue could llss fla99tn9 . neu lnterruPt vhlle
clearÍng thc latch for a rrevlous onc. This 1s not a
serÍoug problel, houever becauses
A) CDI ls Just for error lo99ing. lf such ÍnterruPts
core so frcquently that ïe nlss every other one, Èhe
loggtng routlne vtll stlll get Èhe nessage.
(ln fact, for COIET, cache parity
dltto.
Bl CPt
error has been changed fror an [nÈerruPt to an
erceptlon, so that thls latch uill never be seÈ3

157

C) fíEI is a serious error.
such
Once the first
interrupt ts teken, IPL is raised to tD and further
'nornal' CPU opêration is aborted anyu.y. A second
HEI ls thus redundant.
(As a ratter of interest, systel delay tiaes are such
th.t an ensuing WEI signal utll probably reoain
asserted after Èhe clear pulse has ended anyuay.)
D) SPFI is agaln serious. The pouer failure routine
uill raise IPL to lE to lgnore further SPFIs anyuay.
Each of the interrupts TlllER ll|T and SLINE INT is
cleared by the requestlng device Ítsclf vhen Èhe
corresponding interrupt ls taken (rhen the device
detects that Íts status regÍster has been read).
Each Unibus devlce clears lts ourr BRn vhen I t reeetves
the BGn signal grantlng it the Unibus interrupt (unless
it rlshes to conÈlnue lnterrupting, In vhich ease it
contlnues to assert BRn).
Finally, rhen the nlcrocode takes a softyare tnÈerrupt
it autoaàtlcally updates the HSIPR to reflect that fact.
2.8

Unlbuc Rcqucrt/Grant:

2.t.t

Rclevant Slgnale:

I /O

nate

descr.

I
I

SBRn

synchr bus reg.

o
o

6 I lnes

IdCTRL
HPBGn

BUS GRÀN? H
SÏÏCHR RESET BG H
wBus

Iines

htghest prlority bus grant

reset Bus Grant

I i r.es

Ie I ines

Regtstcrr on ChÍp:

2.8.2
IPL

nane

LUBIPR Last granred UniBus IPR (5 birs)
l{-17
Roquottlng: As ind lcated ln sectlon 2.7.6, i f Èhe
2.E.3
hlghest pcnd lng Interrupt request ls froa r Unibus
de'.'lce (or if there is Do tntcrrupt pendlng that 1s
htgher Fhan the current fFEl Èhe UVIC value for Unlbus
Requests (0f0) is placed onto the UVECTOR llnes. If Èhe
nlcrocode sees IN? PNDG L assertcd and then reads

158

UYECÍil . ala. I t ea3t-cr r

2.t.a

tfn Íbur dcv icc dcscrves rn
lnt.rrupt cnd rlll lrrue ICTRL 3 33 to ceusc r Bus Grant
(rr r.ctlon 2. !.11 .
llre lncorlng SynchronÍzcd &rr Rcgucct I Incr, SBR? thru
1t tra urcd to gcnCr.tc the tso-bit voluc lDlPt<l:t> H,
rlrlch lr th. bÍnary veluc of thc nnbcr of thc hlghest
pcndlng Bur Rcqucrt (notc thrt IBIPR ls lndepcndcnt of
proccstor IPLI. T|tc dcfault valuc (no pcndlng SBRsI is
uBlm(l:9) r oo. [1.c. lDlPRl . SBRT + sBR6; TDIPR' SBRT + (SBR5 e nots8R6, I
A corblnatorltl functlon oÍ TEIPR and thc currcnt IPL
producer thc rtgnel (BR > IPL). Furtherlorc, thc rlgnal
tDt . s8R7 + S8R6 + SERs + SBRa tclls u3 lf thcret
rcclly lr t Buc Rcqucet Prct.nt. Flnrlly' Ex fPeG H
(BR > IPLt 3 UBI lndlcatet rtrcthcr thcrc lg t pcndÍn9
8ur Requcet thrt dcccrvct rcrvtcc bccaurc lt ls et à
lcvcl htghcr th.n thc IPL. Ex BFBG ll i s one of the
rlgnals th.t c.uscs gcncrttÍon of IX? Pt{lrc.
Grrntlng: Àftcr rcclng Ix? Pt|rc tElcrted, thcn uvlc !
ala, thc rlcrocodc rlll ordcr thc lsrulng of t Unlbus
Grant (at thc lcvcl dctcrrlncd by thc lf,T chlp) by
rotÈlng ICTRL r 33. Ac dcrcrlbod ln lcctlon 2.4.5r the
f lrrt
roc.lvcd fCtRt codc .ttblllzcr durlng SPllt ll (tho
It ïCTRL . 33, thc Intcrnal
helf of t tlcrocyclcl.
elgnel ISSUE BG. lc tt3crtêd. (ISSUE BG t SPlll) ls then
tha D lnput to thc adga-trlggcrcd BG PF thtt loads on
thc lcadlnq cdsc of BCLtr, 30 thtt thc FF lill bc sct ln
ttrc ïTlilf of -a rlcrocyclc yhcrc ICTRL I 33 has bccn
rccclvcd. thc FF output te AXDed rlth SPlll L to prodrrce
chlp outPut rlgnal BUS GRAXT ll, t s lgnal thet sterts
lurt aftcr Èhc BCLI ln thc rlddlc of t rlcroclrclc (see
icctlon 2.3 for t dccerlptlon of thccc Èlrlng slgnals).
Furtho6ore, thc eloct 3Èall lng clrcultry (anothcr PtrÈ
of thc CPU), aftcr scclng ïCTRL t 33, rtll sttll
(dtrablc) ICLX and PtlASEl (both dcassertcd).
tYo
Thc tsser t lon of BG cnablcs Èhc lnPuts to (Last
e)
LUBIPR<l:
storG
thcn
thet
trtntPtrcnÈ letchcs
grantcd lrBl PR) unt I I thc ncrt Bus Grant ls lssued- Thls
uvEcroR ltnes durlng chls
LUBIPR ls thcn Put ontoffi
(HCTRL I 37 rculd
I
(rctnL
llero-cyelQ.
33)
Bur Grent
ordcr Èhc placlng of LUBIPR onto the UVECTOR I ines
rlthout uÉetlng lt, nor lssutng Bus Grant).
Er tcrnal ly to thc IxT chlP' BUS GR^I{T H perforns trtc
(in

the Unibus arbiÈraÈion
funct long. lÈ ls arbltratcd
c I rcul tr y) agalnst tlPR, NFG, and SACK to tsserÈ BG EN,
thc cnablc slgnal to the four lfn lbus BG d r ivers r à t the
tlre; and lts trail tn9 edge causes the
rcleasc of the stalled icLK and PllAsEl.

rpproPr latc

159

2.t.5

2. t.6

Internal signals llPBR6 thru a) along ri th SBR7, icnote
thc Ëighcrt Priorlty pendlng Bus Rcqucst (indepcndent of
current IPL). ltrus rt rost onc of thcse four signals
ulll bc rsacrtêd rt.ny glvcn tlrc.
llPBRG thru a .re
(sce
seetion 2. E. 3) to forr
thcn AIÍbd vÍ th EX BG Ë
outPut signols ilf8c6 thru I ll, vhich then 90 to the
Lfn lbus BG d r lvers, along ul th SBRT [.
tïrus onc of the
three tfnibur Grant lincs EG6 thru I ray be asserted only
if ue lnor, f ror Ell 8G ll, th.t thc rcqucst .t thrt lcvel
is indccd hlghcr th.n thc currcnÈ IPL. Ic ..y issuc .
BG7 vtthout crpllcitly
tcstlng Ex EG Ë, bccause sÈ knov
th.t, if tn SBRT ls prcscnt.t thc tirc of the issuing
(by rlcrocodcl of BlrS GRAff, it is indeed.È.
level
highct thrn thc preacnt IPL (scc scctlon 2.8-6).
Clorrlng:
ltc lnput slgnol StïCtrR RESET tG H is uscd
to clcar thc BG FF (.t thc ncrt BCLI leading cdge),
thcrcby endlng BlrS GRAXT and rclcaslng thc cloct stell.
SIf,CHn RESET BG ll ls . synchronlzcd slgnal, storttng et
rn ICLI trailing ed9c, to avoÍd oscillation of thc BG FF
Èh.t rculd bc causcd by changing this resct signal et
thc sa.c tlrc ts thc FF's clocl cdgc. Condltions
causlng thc asscrtion of SïXCIR RESE? 8G H .rc the
asscrtlon of IAIT (cffcctivcly cqu.l to SÀCI, for this
pur posc) on thc tfn lbus r o! thc .ssar t ion of t{O SACX
?IiEOUI in the tfnlbus arbitrrtlon cÍrcuitrt/.
Felc Grrntr: It is posstblc thet an inÈcrrupt rêqucst
vill bc asscrtcd Èhcn reroved bcforc bctng scrviced.
(OnIy. tfnibus device rlll cvcr corlt thts offcnse.!
If this rcquast is thc hlghcst onc pcndingr is at a
lcvcl hlghcr than thc currcnt IPL, end is present thru
tlCLtr, I t rl I I ctusc cssertion of ll|t PtE L, and UV:e
vtll changc (to ClC, to lndlcatc lts idcntity.
If noy
thc regucst is rcrovcd aftcr ll|t Ërc L has been read
(by rlcro-codc or trardrïEfl but bctorc UYIC has been
read, UVIC ulll rcvcrt to ltr prcytóFiiïluc and ray nou
idcntify r rcqucstcr .t a levcl bclou thc currcnÈ IPL.
In sueh a c.sc, thc dcassertlon o]i-nt PilDG forccs the
value gn (fate BR) onto thG UYECTOR lincs.
Ttrus
rnytinc INT lnovs thcrc ls no pcndlng lntcrrupt (> tPL)
but the nicro-codc thinks thcra ls and branches on
UVECTOR llnes to scrvicc it,
it (ricro-codc) yill be
told Èhat thc lnterrupt requcst ls e BF.
(ïhe
nicro-code does not knor or cara rhich BR, ..rd in fact
I PL lust bc lcss than I7, so tf,'IF-sorc icvcl BG is
perrisstblc, becausc only a tlnlbur (EEÏ- device could
have asserted and reroved lts regucst.l Noy ricro-code
rill lssue HCTRL 3 33, ordering a Bus Grant. INT knoys
ÈhàÈ no prescnt BR is abovc IPL and therefore forces
HPBG6r5rl H to a to prevenÈ lssuing Unibus BG6r5, or l.
Furtherlore, SBRT is not asscrtcd (it Ít uere, trrÊ rculd

160

have a lcgtttaate lnterrupt and uouldnrt be ln this
ress, bccaulc ue knou IPL
noÈ bc tSsorted. llorever r uê rust lssue BUS GRÀNT
(uhlch ulll ulÈlrately enable the-Iltlbus 8G drivers to
transrlt Èhelr es) to rcleage the stallêd ltCLK. No BGn
results ln no SACI, Èhua Sïl{CllR RESET BG lt rould
nor!àlly etlq BUS GRÀNT (at the f lrst BCLK leadlng edge
af Èer thc f lrst llCLtr trall lng edge) af ter the assêrÈlón
of the NO SÀCK TIiEOUT. Houever, fNT knous thls ls a
fake grant and can therefore end BUS GRANT early.

Ttte deasserÈlon of EN HPBG (see sectlon 2.8.3) ÀND the
deasserÈÍon of SPlll rlll cau6e the 8G FF to clear at the
nert BCLK leading edge. (The BG FF yas alloued to s!!,
desplte the deassertlon of EN HPBG' otr Èhe leadlng ë@e
of BCLK durlng the asaertlon of SPlll.) Thus Bus Grant
uill lasÈ Just lonfl?Ïffigf,-(t ns; to release the clock

stàll, then operatlons rlll

t6l

resu[e.

{8 t <--- TTÍ.IER IIIT L
{7t---> IIIT PI{DG L
46!---> 8US GRÀNT H
45 t <--- S8R' H
rCTRL { H --->te5
{{ t---> HPBG6 H
TICTRL 5 H ---> t 06
t3t---> HP8G4 H
PHÀSEI H ---> lg7
12 t<--- S8R5 H
IíBUS 22 A <--> t e8
tl t---> HPAG 5 H
lfBus 23 H <-->t09
t0t<--- SBRT H
PROC INIT L --->tlg .
39 ! <--- SBR6 H
I|CTRL 2 H --->tll .
38 t---- GROt'ND
VGA ----ll2
. LID . 37 t <--- SYNCHR RESET BG H
vcc
l3 . DOHN. 36 t <--- BCLK L
IÍCTRL I H --->tl{
35 t ---- GROT'ND
I{CTRL 3 H --->tl5
3{ t <--- I{CLK EN H
IíBUS 25 H <-->tl6
33t<--> rBus t6 H
ríBus 24 H <-->!17
32 t <--> f8us 17 H
rfBus 26 H <--> I lE
3lt<--> wBus t9 H
lfcTRL c n --->tl9
30 t <--- SLINE INT L
UVECTOR E H <--- l2e
29 | <--- Í)cLK EN H
UVECTOR 2 H <---t2l
28 t <--> w8us l8 H

HEI L --->tel
CPI L ---> re2
SPFI L ---> te3
CDI L ---) te{

UVECTOR I H
UTRAP L
UVECTOR BRÀNCH H

<--- 122
--->t23
---> t 2{

27 t <-->

rBus 20 H

26t<--- PTE CHK OR PROBE H
25t<--- DOSRV L
INT PIGURE I

PIN CONFIGURÀTION DIAGRATT ÀND PIN IDENTIFICATION

t62

3.12

IXSTRUCTIOX REGTSTER DECODE (IRD DC622'

Grtnrt. DBscRIPtlox:
Thls sPectflcatlon deflnes the dctail requirenents for
VÀX-lt./?s, Inetructlon Reglster Decodc.

the

IRD tabtr I

Pln Identlflcrtlon end Grtc Typc

PIr I
,l
a2
03

al
t5
e6
a7
38

It
ll
ll

I5
l6
l7
l8

l9
2a
2l
22
23

PIX ID

cotrlrTs TIPB Ptt I

XB.'H
H
pSlH
'I
xB It lr
IRIH
IR6II
IRTH
XB
H
IR5B
'2
XB

IR 2A
XB09B

GAtrr[F25
GAI?XF26

GAttilF27

GAI?2F28

cAlTtil29

GAI?TTI3'

cAlrn|3l

GAlrxF32
GAITnt33

cÀltTr3a
GAITZF36

IRIII

GAITÍII37

PSr cf, E

GAITI?II

LD OSR L

GAltx?.2

DST RTODE H

x815Ë

XB15B
xB 12 ll
DISP IEIZE H
'
xEt3[
LDIRL
XB97B

cAlril39
cAltr?tt
GAITZFI3

GAITZFII

GAITilI5

cAltzFa6
GAltrraT
GÀITI?I8

t63

PIX ID
CS ADDR E2 L
CS ADDR EI L
REG TODE H
CS ADDR 90 L
CS ADDR C3 L

C(NTEITE TIPE

I31:iill
i3i:i3Ii

IRD CONTROL L
IRD ÀDD CTL I H

rcLrt
XBIIH

IRD ÀDD CTL
IRD RXIT 3 H '
IRD RXTN C B

TR3II

IRD RNIË I II
IRD RXI! 2 U

XE'6H
xB t3 ll
DISP ISIZE I H
rctRL 2 tr
xB t8 rl
XBIIH
IRCH

GAITCN
GAITCN

GAIT?X
GAITCX
GAlt]cr|
GAITNF
GATT[F
GAITNE
GAITZF
GÀITNF
GAITTN
GAI?TII
GÀIT?N
GAITTII
GÀITTN
GAITilF
GAITITF
GÀI?TN

GÀITilF
GAI?ZF
GAJTZF
GAITTN

Prrformnco

2.1

IRD St.t.

ll.l.ntrs.
ll8tn nE (?rf): f|rls ts an I btt reglster bullt f roa
lltchar. clochlng of thc latches ls cnablcd rhen tD rR
L ls raacr.tGd. If clocklng lg cnablcd, the latchcs opcn
rhcn n Cti L ts .aa.rt.d. I Gn I CLi L ls not rascrtcd
thc latchcs arc clogcd. ttre IXSTR REG ls loaded ylth XB
(l7z9l) [ tf PSL Ct Ë ls not asscrtcd, and ulth
XB<15:08) tf PSL Ct Ë ls aslcrtcd. tttcrc ts no uay to
dlrectly clcar thts rcgtstGr.
OSn (?lt)r
ttls ls rn I bÍt regÍster bullt fror D type
flfp flops. ft ls clochcd by rhê rlstng cdge
of i Cti L
rlrcncvcr LD osR L ls rsscrtcd. lliG data -ls spcclf tcd

2.1.1

2.I.2

hcreln:

2.2

2.2.1

2.2.2

2.2.3

2.2.1

PSL CTr H

LDIRL

L
L

Data Source
xB <07:00) H

XB <15:08) H
XB <C7:te) H

Pln DmcrtpÈlonr:
t CLf, L: ttrls ls the clock aagoclatcd rlth the
rtcro-scquGnccr. tl CLX t ts uscd to latch the INSTR REG
and to clock the OSR.
LD IR Lr tftls slgnal spcclfles vhcn an opcode ls bclng
fetchcd. líhcn LD IR L ls asecrtcd Èhc IXSTR RcA ls
loadcd rlth XB <C?zJl) or t(B (15:08>. lt ls alao used
to gcneraÈc IR (7 tO) ll, CS ÀDDR (03:0C) L' IRD Rtlutl

(3:0) llr and REG IIODE 8.
tfrlg slgnal spG-cl-t tcg theÈ en opcrand
LD OgR L:
rpcclf lcr ts bclng cva-luatcd. lÍren tD OSB L le agscrted
alra osR lg loadcd-rltli'-xB <15:98) or xB-<ï7zeo). tt ls
elro urcd to gcncraÈc IR <?:0) ll, CS ADDR (03:0C) L. IRD
nXUi (3:0) B, and REG IODE H.
PSL Ct Er Thlr ctgnal lndlcates rhlch rode of
tnctructlong tha rachlnc le crccutlng, Nrtlve or
Gorpetlbtllty rodc. ÍlrG gtate of thtg slgnal dctcrrlncs
rhat lr loadcd lnto the IXSTR REG and thc OSR. It ls
alro uaed to ganaratc all output slgnals GrcePt XB
<15:t8) B.

2.2.3

tRD ADD C?L (l:l)

f,: ttregc slgnals specÍfy uhat branch
lnforraÈlon should bc ORcd onÈo CS ADDR <e3z0e> L. See
dcccrtptlon of CS ADDR <e3;OC> L. Paragr.Ph 2.2.11.

l6l

2.2.6

IRD COITROL L: tfrls slgnal enablcs thc II{STR REG or thc
OSR onto XB <15:C8>. (Sec Paragraph 2.2.9r.

2.2.7

fqlRl 2 B: ltrÍs stgnal sclccÈs vhethcr the II{STR REG or
the OSR should be read onto xB (15:08). Scc Paragraph
2.2.9.

XD (t7:!t)

t: Ttrls half of the xB ltncs arc uscd as
input only. Thcy contaln rn opcodcr !o operand
spcclflcrr oÍ part of t Corpatlblllty rodc lnstructlon.
XB <t7zCO) H arc used to gcnaratc.

2.2.4

IR <7:C) H

CS ADDR <03:C0> t
IRD RNUil (3:e) H
REG TIODE H

Tte upper half of thc XB lincg are used às
XE (l5rt8):
boÈh lnput and outpuÈ. líhen uscd a3 lnput, the slgnals

2.2.9

contaln an operand speclflcr or the opcodc portlon of a
Colpatlblltty lode lngtructlon. Besldes bclng uscd as
data for the INSTR REG and the OSR lt ls uscd to

9cncrate

lR <7:e) H
IRD RNTtri (3:E) H

CS ADDR <e3ze0>. L

' REG iODE H

l{hen used ta ouÈput., XB <15:e8> H are drlven as follous:
IRD CONTROL L

TICTRL 2 H

Z (Hlgh Inpedance)
INSTR REG (7ZE) H
H OSR (7:C) H

2.2.1a

XB <15:eE) H

IR (7:t) [r Thls group of sÍgnals contatns thc opcode
or an encodlng of the opcodc rhlch ls uscd by the
n lcro-sequencer. Itrcy aïè epecl f ted hcrcln.
Se-e IRD
Table 2.

PSL CH H

t
t

IR (7:e) H

LDIRL

XB <e7:00> H
INSTR REG (7:C) ll

L
H

Soc Tablc lll

uhcrc

Opcodc <15:ee> - XB

<15:e0> H

Scc Tablc III uherc

Qpcodc <15:08) r INST
RDG (7:E) B

165

Opcode <O7zOO) s OSR

(7:e) B

Inttr.

IRD tablc 2

IR <7:f) H

rR3

IR2

tRl

tRo

Drcodr Glrr

Glrrc

I n7

IR5

IRI

Opcode(ll: ll)-eeel

Opcode( 8)

Opcode( 7 )

Opcode( I 5)

Opcode( I 0)

Opcode(e9)

Opcode( e6 )

Opcode(7 >

Opcode( I 5 )

Opcode(l{)

Opcode

Opcode<12)

Opcodc( tl: l2)/e
tnd Opcodc<ll: l2>l?
Opcode(ll: ll).lll0
or lllr
Opcode(l{: ll)-e

Opcode(7)

Opcode( I 5)

Opcode< I e )

Opcode(09)

Opcode( I I >

Opcode

Opcode( I 0)

Opcode<09)

Opcode< 08>

Opcode(15: e8).0

Opcode(15: e8).e
and

and
Opcode(15>< LOzeS>le
and
Opcode(37 ze6)-O

Opcode(7) Opcode(15) Opcode(e2) Opcode(01> Opcode<e0)
H

Opcode(0?:06)-l ,2ror

t65

Opcode(7) Opcode(15) Opcode(04) Opcode<05) Opcode(06)

2.2. ll

2.2.12
2.2. 13

CS ADDR (f3:!f)

L: These are the loresr four Control
Storc Mdress llnes. They ire drlvcn based on a decode
of thc opcrand speclflcr betng cvaluated. They ean also
b. drlvcn as a functton of TNSTR REG (2zg). See IRD
chart t.
IRD RItt (3:t) B: These slgnals speclfy the re9 ister
nurbcr aasoclated rlth the operand speclfler. They are
gencratad as shovrr ln IRD chart 2.
Rre iODB f,r This slgnal lndlcates yhcÈher the operand
spcclflcr belng evalóaÈed spectfles reglster node or
not. See IRD chart 3.
TRD CHÀRT I

IRD ADD CtL.(l:9)

I
I

PSL Or rl

LDIRL

INSTAUSTIoil crASS
CS ÀDDR <e3zee> L

llll

(No branch)

See chart lÀ yhere

N{ODE (3:e) - XB <15:12> H
REG llutl <3:0) r XB <ll:e8>

Sce chart lA rhcre
ÀIIODE (3: e ) r XB <07: e{> H
REG NUll (3:0> r XB <C3:0e>

4.D2,.
See chart lB yhere
B2(xB <ll:e9> | tl or ?l ÀilODE (2ze) - XB (5:3) H
REG NUil <2ze> . XB (2:0) H

Blr

B2(XB <ll:09>

C, Dl

OTHER

\67

BI,

See chart lB uhere

tf or 7l ÀËODE (Zze) - XB <ll:09> H

82(INSTR REG (3:l)

REG NUll (2:0) . XB <08:06>

0e0l (Actual Value)
See chart lA uhere

ÀtlODE (3:e) . OSR (7:{> H
REG NUtl (3:e ) r OSR (3:e) H

See charÈ lB uhcre
= {) AIIODE 1,22e) - OSR (5:3) H
REG Nutrt (2zO) - OSR (2:e ) H
tlfl (No branch)

INSTR REc (2zg) L

IRD CËANT IÀ
AHODE (3:C)
e

REG NUll (3:9)

,1.2,3

(Àctual Val ue)
CS ADDR <e3:eC> L

I l0e

e ll

ccte

{

ecl I

llll
,lll
I l0ll

llte

cLac

leOc

c- la
l5

Itel
Itle

,ltl
0l l,

LO. ' 2, 14

10,l2.la
ll, 13, l5
llrl3rl5

e-ll

l6!

l0t

IRD Cf,ART 18
AtioDE (2zO)

nEG NUlr (2:e )

(Àctual Value)
CS ÀDDR <C3:C0> L

llll
lll0

c- 6

tl0t

Itm

Itl I
ttl I

aeac

I eel

to0e

elll
el It

{

at90

,l tl
,tl I

oala

tr0l

t69

TRD GTIRT Z

D8t Gf, I

tJ rn L

rtstnGtrc ctt88

InD nrn (t:t

IB <ll:ft) H
IB <f3:tt> ll
Jo XB (12:ft> ll

lrr

A, D2'-

BI,

x
tf

crDl
A, D2o

B2(IIS?R RDc (3:l> / a or 7l

to lxstR R8G <!> A,
OSR <7:6) H

BI,

Jo OSR <234> B

B2(XB <ll:t9> I

B2(Xg (llrt9>

I or 7|

. I OR 7l

Oo XB (18:t6> A
a

B2(INSTR RE (3:l)

r I OR 7,

InD Ctrnt t
IRD
ADD

PSI
B

L
H

X
L

X
lrlr3

trl,3

B
g
I

X
I
L

0rlr3
2
2

lR
L

CTL

(l: t)
E

IxsTRt c?Iotf ct^ss

X
A' D2o
B2(XB (ll:ag> I I or 7)
Bl,
82(XB (ll:t9) . I or 7,
Dl, c
X
À, D2
B2(XB (ll:ag> I I or 7,
Bl
82 (XB <ll:!9> a I or 7l
DlrC

otf,ErtsE

REG IODE II

ltflB<07r!l).5
I ff XB <35:03) . a
f lf XB <ll:09> - Q
a

flfOSR<5:3>.0
t lf (IB <05:C3>
AxD OSR <5:3>) - Q
f lf (xB <ll:C9>
AXD OSR (5:3)) . e
llfOSR<5:3)aC
g

170

2.2.14

D8t RTODB lt
thtg etgnal sp.ctflcc rbcther thc
dcrtlnatlon opcrand lr rcalrtcr ródo or noÈ.
PSLCTE Osn?=-n osR6n
osR5E OSRTH OSR3n DSTRTODEI
lt

oanEmtsE

L
L

2.2. l5

OTHEUISE

(t:t) Er l|rere rtgnala rrc uscd to lnd lcatc
tha slzc of rn addrccs dlrplaccrcnÈ tn the ISTREAIi.
tlrcy arc spcclf lcd rr follovr:
PSL Cr n
OSR <?:l) ll
DlsP tslzE (l:0) H
DISP lSltl

lo, ll
12, l3

ll, 15

OTEER

l7t

n t, r --->rtl
f!t---> IR , f,
n tt r --->tt2
t?r<--> E lt I
I! tl I --->tt3
t6t<--> n ,! I
D lt Ë <-->trt
t5t<--- retnt 2 f,
ln t tr <---trs
tat---> DttP tstze I ï
rR 6 I <---tr6
t3t<--- E t! r
tR
7
f,
<---tt?
t2t<--n t6 I
p a2 n ---> r tt
tl t ---> InD Rrt! 2 a
lR 5 tr <---tt9
ttr---> IRD Rrt! I n
tR 2 f <---tla ....... t9t---> IR ! n
n ,9 [ <-->tll .
. tft---- GRotrD
UGI ----ll2 . LID . t?t---> IRD Rf,t! t f,
ucc ----tl3 . nr. t6t---> IRD Rrln 3 n
. tRaB<---tta.
o!5t____GRO|DD
E? RiODE B <---tl5 .o..... !at<--- IID AD Ctt t ll
P8t Cr l| --->tl6
l!t<-_> E lt r
I8 t5 B --->tl7
t2t<--- I ctr L
LD OSR L --->tlt
3tt<--- tRD ADD CtL I a
n 15 E <--> t 19
tf t <--- tRD comnoL L
r 12 r <-->t2f
2gt---> es ADm a3 r
DtsP tsrzB , B <---t2l
2tt---> cs
tt L
r lt B <-->t22
iODE tl
27t---> RDG^Don
LD IR L --->r23
26t---> cs ADoR tt L
xE a7 [ --->t2l
25t---> cs ÀDDR t2 L
IRD FIGURE I

PIX CONFIGUNAIIOI DTAGRÀT AXD PIX IDEXTIFICATIOT

172

t. 13

1.,

msstus crl lrttt?rc? c(nnol ctP (rcil
A GTENAT DEII?IIC
fcl controls thc iASSBIIS Ctt interface.
lt hendlcs
f rbÍtratlon, c{altd/eddross control , strtua gcncr.tion
t chcctlng, lrÉ interrupts.
It cont.ins bits of thc
control, Statut, lnd ralntcnencc rcaistcrs.

ttnlrrt&I
Sac tt.tc clcrcntt .rG dct lncd in tcrrs of signing
prcf lrcd by LOAD, CLR, COtn|t. If nonc of rhcse signalé
arc truc, thc elcacnt docs not change st.tc.

SIGITL DCSCNTPTTCS

3.1

AtIr - ArIr str I
Atlï Snrc [ ls e ttl. input.
ATtl| Ís en cdgc triggcrcd flipflop clockcd on rhc rising
cdgc of tBÀ CLI L.
ATn|

3.1.1

IE ls rn cdgc trlggcrcd fltpftop cloctcd on tha rising

cdgc of i8A CtI L.

lI)ÀD IE . LD efRL H
lE <---- IBUS 2 H
CLR IE . tlllT I
IOAD IE end CLR IE both bcing truc

3. t.2

3.1. t

Ís an illegal control
stttc.
DT IIIEI f,, IIIER L
m BUSI ll and IXTER L are t?L tnputs
ER, !R t
8R ls e trrnsp.rcnt latch, ollcn ytrcn nBA CLX t ls lov
BR <
(DT BUSï L Àrtï H + IXTER n1r IE H
8R L is. totcr polc output, end is thc lou truc output
of the 8R làtch.

173

3.2

lc stïc L, Do wctron clc
BG SYI|C L ls a TTt lnput.

Do tECIOR cïc ls an edge trlggcred D fltpflop clocked on
Èhc rlslng odgc of tiBÀ CLK L:-

M YECTOR CrC

rAIT II ' [I'IT L
3.2. I

TAIT, IÀIT L, TÀITIDG
t|AlT ls a tr.nsparGnt latch, open uhen iBA Ctf t ls lou.
T{AIT

WAIT L ls an opcn collector output, and is the lor true

output of the IÀIT latch.

IÀITING is an edgc Èriggered D flipflop,
rlsÍng edge of iBA CLK L.

clocked on the

WAITING

1.2.2

YECTOR CtC, YECt{rR CrC

is a set reaet latch.
SET VECAOR CfC - IAITING H . CiI CllD EN H
CLR VECIOR CYC : IÀITfl|G L
VECAOR CYC L ts a toÈel pole output, and ls the lov true
outPut of vEcTioR clc.
.
sLfr cf,t L
SLff CtrI L ls r TTL tnpuÈ
VECTOR CIC

3.2.3
1.2. I

m crl rÀsttR B
DO CfI IASTER H is

t.2.5

an open collector transcelver.

DO CtíI iAStER H ls drtven lov by lrCl lf DRM DO CllI
ltÀst H.
mIvE DO Cit I|ASTER H r DO VECAOR CrC L . (rrAST DAT CyC
B + DO Cf,T CTC L + SLfr Cf,T H . DtT CXTR EQ 27 III
An8, Ant L
ARB ls a trenaPtrcnt letchr oPêÍr rhen ilBÀ CLK L ts lou.
ARB

ARB L le t Èotcr Polc outPut, and ls thc lov true outPut
of thlr ARB latch.

l7l

3.3

lÍr ctD
BLÍ CiD ls .n edgc trtggered D flipflop,
rislng cdgc of i8À CLr L.

clocked on the

LOAD BLK CiD - LD iÀtt{T ll

BLK clID

CLn BLf CiD . INIT H
LOAD 8Li

3.{

CiD and CLR BLX CiD both being true ls àn
illcaal condltlon.
r st n?A crc
iÀST DÀTA CïC is an cdgc trlggered D flip€lop, clocked
on thc rlstng edge of iBA CLf, L.
SET nÀST ÍIATA CYC . C;I CrD EN H
CLR fiÀST DATA CYC r DBBZ L

3.a.I

DRIV! m Cf,r CïC
clocked

3.a.2

DRIVE DO CfrI CIC ls an edge triggcred D flipflop
on thc rÍslng edge of ttBÀ CLf L.
mtvE Do crrr cïc
VECTOR CYC L ' IIÀS? DATÀ CYC H.
DO CrI CïC H
DO CliI CYC H ls an opcn collecÈor tr.nsceiver.
CYC H ls drlven lou by iCI lf DRM O Cltt CyC H.

DO Clrtl

3.5

Br?E ROTATD, BrlE ROTATE I

BffE ROTÀTE ls an edge trlggered D fltpflop,
the rÍstng edge of tBÀ CLK L.
LOAD EYTE ROTATE . Í,D VAR H

BYTE ROTATE
EffE ROT^TE H is

3.6

clocked on

a totct pole output.
cf,r ctD Ex, cf,r cf,D Er L
CllI CflD EN t s an edgc tr lggered D f I tpf I op clocked on
the rlstng edge of fBA CLK L.
CIII CIID EN
Cltll CilD EN L is a Èoten pole output

175

3.6. I

3.6.2

Cf,I OUT EI
clll ouT Eil ls a Èransprrent D latch, open yhen t||BÀ cLK L
ts lou.

cnl ouT EN <---- Cnt crD Ex ll
Cf,l <27:25) [
CiI <27225) H are threc trl-state transcelvers. lhey
are enablcd lf CtI OUT EN H.
clft 27 H
L

Ctll 26 H <---- DO VECTOR CrC L
CÍrlI 25 H

3.6.3

CII FUX (2:t)
CllI FUX <2:0) are three transpàrent latches, open if
CYC POS H t iIBA CLX H
Cff I FUN (2:0) <---- CttI (272 25> H, respecttvely.

3.7

ADD

DnrYE DBBZ, DBBZ t

DRM DBBZ is a transparent D latch, open uhen llBA CLK L

ls lou.

ERRORL'DOSTÀI'E

DRIVE DBEZ
OPH

3.8

. STÀVE DONE L.
DBBZ L ls .n open collector tr.nscelvcr.
DABZ L lou tf DRIVE DBBZ ll.
SIAYE DOIE f,, ADD ERROR t

llCI drlves

STAVE DO}|E H and ADD ERROR L are TTL inputs.

3.8. I

CTDCT ?Uf,
CHECT FUN
DO]IE L.

3.8.2

ADD OT B
ADD Of H lg an opcn collcctoÍ tr.nscctvcr,
ADD OX H lg drlvcn lor by tCI tf
(Ctlt Ftlt I H. (SrI FUX (2zO).21 + CHECI( Pultl L

175

3.4.3

D() ST,^YE OP
DO STAVE OP is

an edge trlggcred D fltp flop, clocked on
the rlslng cdge of iBÀ CLK L.
Do ST.àVE OP

3.8.1

S!ÀYE RTAD L

r toÈcr pole output.
SIÀVE REÀD L. DO SI^AVE OP L + ADD ERROR H + CIIII FUN 2

SÍÀVE READ L ls

3.9

ADD CïC FOS

ADD CYC POS ls

an cdgc triggered D flipflop
tha rlslng cdgc of iBA CLK L.

clocked on

ÀDD CïC POS
3. l,

STÀt <I:f)
STAT (l:C> are tuo tr.nsParent D latches, open rhen ttBA

CLf L ls lou.
STAT I

<---- ADD ERROR L ' RETURN STAT L

STA? C
3.

lt. t

stAt out Ex
STAT OUT EN ts t

L le lov.

transpàrenÈ D latch, open vhcn IBA CLK

HT ISIAIIEDONEH+ADD

STAT OUT Eil
ERROR H)

lr.2

Sl (lrf)

ST <l:e) L are tuo open collcctor ÈrlnrccÍvors.

ST I L ls driven lou by iCt if STAt OU? Etr H r STAT IH
ST C t ls drlven lov by tCI lf STAT OUt EX H. STÀ? OH
3. lt.3

RI?UnI ETAT H
RETURX STAT H

Ís à TTL lnput.

t77

n 8?rt

3. ll

IR STAI ll ir .n edge trlggcred D f ltpf lop, cloctcd on
tho rtrlng rdge oÍ tEA CLt L.
SE? IR StAt . (S? <l:l) lt . ,, .

rAst D ?A crc H . tnBz L

Ct.R XR STAI . (LD St^t H . IBUS I

lll
3. 12

lt + tXIt H' D? ItrIT

r .Iol. sET xR s?AT.

CRD

CRD lr

.n odgc trlggcrcd D fltpflop, cloctcd on rhc
rlrlng edgc oÍ iBA CI'l L.
SET CRD. (St <l:!> ll . 2l . |AST mTA C1,C H. DBBZ L.
CLR CRD - (LD STAt [ . BUS 29 H + INI? H + Dt II{IT H.l
. .xot. sEt cRD

3. l3

3Rn StA?
ERR S?At lr

an cdgc Èrlggcrcd D fllpflop, cloclcd on the
rlrlng edgc of rBA CLI L.
SE? ERR STAT . (ST<l:0> 3 fl ' |AST DÀTA CË H ' DBBZ L
CLR CRD r (tD StÀT ll . IBUS 3ll + lxlt ll + m INIT Hl .
.XOT. SET ERR STAT.

3. ll

3. ll.

E LO ST.ICE U
E L() Snrc n is a TTL lnpuÈ.
oLD E rO SïXC
cloclcd
OLD DC LO SYI|C ls an edgc trlggcred D flipflop'
on the rlslng edgc of iBA CLtr L.
oLD Ir LO SïNC <---- DC LO SïNC H
IXI? Ctl <l:f) B
INIT CTR (l:C) H tre tuo edge triggered D f!Ípflops'
clockcd on the rlslng edge of iBA CLX L.
INIT CTR E H

INITCTRIH<

SYXC H ' DC LO SYNC L)

INITCTRO H

178

t. ll.3

3. l5

trlt L
IXIT L is . totc. polc output.
lNIt ll . IxlT Cfn 0 H + IIIT CTR I H
Dt FII <l:!) |
DT Fltrl <l:C) ll arc tuo TtL inputs
tfrcy arc cncoded to define data trensfcr opcrrtions
m FUX (l:!) H FuxGtlox

cl
It
ll

3.15. I

I DLE
READ

TRITE

rCf, (rritccheck)

DT IDLE

DT IDLE ls rn edgc triggered D flipflop,
rising edgc of iBA CI.Í L.

clocked on Èhe

DT TDLE

3.15.2

DT IITT H

m II|IT H - DT IDLE H. (Dt FUX (l:O)
3. t6

DT AEOR?
DT ABORT is

an cdge Èrlggered D flipflop,

rislng edgc of iBA CLf, L.
LOÀD Df ABORT . LD CTRL ll

clocked on the

DT ÀBORT

CtR DT ABORT - INIT H
À control state to sinultaneously load and clear
À8ORT ls illegal.

3.16. I

ÀEOR? L

3. l7

ÀBORT L is an open collector output.
It is driven loy
by llCI if DT ABORT H + NR S?AT H + ERR STAT H + TI8 EXC H
li, ItL

trll is àn edge triggered D f I ipf lop, clocked on the
rising edge oÉ nBA c-L-K L.

l?9

LOAD lfl

r LD C?RL H

n <---- tSts 3 l|
. IIll
À conÈrol atrta to slrult.n.ourly to.d .nd clc.a n ia
lltcg.l.
n L 13 a tot.r gola output.
Dll Cnt <a ra>

CLn n

,.ta

DLI CITR <a:t> lr a flvc blt iynchronois up counter,
clocl.d on tha rltlng ad9è of líBA ct.i L,
DLI CIfn <a!l> aÍc aalnchÍonourly t.t to on"a lf m CÍil
CIC L.

DLt Cx?R <t> 13 a aynchronously 3et to on. lf
ClC L r lBl CLi L.
COITIT DLI CIm <a:l> .

3.19

(DLI CXTR - 27, r DO CÍtl CIC H

EtC aIIC L
EXC AIf,C L l..

3.19.1

m DO CtlI

TIL lnput.

LÀlCllD tIC SIIC
lÀlcBEl, EIC SYIC ts I trlnsPtrcnt latch. open fh.n ltEÀ
CLI L ls hlgh.

3.lr.Z

t.2a

iE tIG
ltB lxc lr !n cdg" trlggarcd D fllp flop, cloclcd on thê
rltlng cdg. ol ílA CLI L.
StT ltB ErC - 8xC SIUC H r LÀlCllED ErC Sl't{C L
CLR rB ExC - (LD STÀt. IEUS ? l| + IIIIT í + DT ll|lT Bl
. .XOT. SET ÍIB EXC
IIUE Ë i, nlc qnl GÀ <2:t> I
IBUS U ll rnd REG CmL GÀ <2s C> ll rr. TIL inPuts. ll|csc
rlgnrla contsol thr lotdlng rnd rc.dlng of attte
Glar.nt3 tror rnd to tha IBUa tlgnlis.

r8c

IBUS RI ll

REG CTRL GA <2:O> ll

ala

a
,
t.rl
I

lta
I'I
lra

,II

3.21

Control Siqnal
LD vÀR rl
LD S?AT II
LD rÀlxt rl
LD CTRL H
RD StA?

I'I

RD tAtxT
RD CTNL

o?íER

xoP

rBus <29, 2A. t6. 7. t.

2, t. a> tl

t8lrs n È rra trl3trtG tr.naalvGrs,
n . 29, 28t 7, t, 2, l, a.
fBUs 16 [ t!

n
29
2a
16
I
2
I
r

. trist.tÊ dlivar.
oparrtlon ls ru-.rlrGd tn thc folloelng tablc Íor
IBIrS n I
EI|ÀBIE
ttÀtÀ
Rl, slAT l| | IUll I
CRD H + lxlt I
RD
È + txlt H
Bti crD B + txlt tl
tD 'lttlrt
StAt n + IXIf lt
Àt I
nD St^t H + RD CTRL H. tIIt í
RD ST t n . 8nR StAt n +
RD CT9L í . lpt ll
RDC'RLT + IIITT
IÈH+txITH
RDstA?l|+RDC?nLÉ+ tratt I nD s?f B r taR sTÀt H +
nD CTRL 1 r ÀBOR1 tl
nD C?RL H + IXIT n
RD C?nL H . INtt tl

r8l

. rcI ?rbtr I Pln ldratltlcrClon rrÉ Grto typ.
Ptr I

PII ID
GAIS ?IP3

I Cf,I 3C ll
2 CrI 3l rl
3 CNI 2E H
I cnl 29 al
5 IBUS ll ll
6 IBUS 6 ll
7 RDG C?RL GÀ C H

GÀ

ITTï

GÀITTI|
GAITTX

GAITTII
GÀITZF
GAITZF

GÀI?XF

8
9
IC

DO CTI CYC H
GAITCF

SCLr SïNC t

SILO CTRL TDP I H

GÀITNF

GÀITTII

II
II
15

SILO CTRL iDP

GÀlrrf,

II'

START STOP trB L

GAITTF I

REG CTRt GA 2 E
GAI1TIF

16 rBus tr ll
I7

DT DIR H

r8us c B
2XD lrBA CLr L

20 rBus I B
2I

SII.o C?RL IIDP 2 H

GÀITXF
GÀITNF

GÀITZF
GÀITT{F

GAITZF

GAITTII

L82

SILO CnIP SEL I t
GAI?TX

2'
2'
25
26
27
28

iBA CLX DIï H
I}T FUr|

GAI?XF

GÀI?XF

ErC SrXC L
REG C?RL GÀ I

GAITXF
H

GAIIIIF

TAST ?RAXS H

SII'o ADDRESS 3 H

GAI?f,F

GAITT1I

SILO CHIP SEt E L
GAITTN

30 iBÀ CLI L
3I SILO ADDRESS 'I H

GÀI?NF

GAITTN

SILO ADDRESS 2 H
GÀITTN

33 SILO ADDRESS I H
GÀITTN

3I
36
37
39
4E
4l

DTFUNIH
tOÀD SrLC tl

SILO PÀR O H
SILO PÀR I H
PAR L

IEUS 22 H

GÀITNF

GÀItTt{
GÀITZF

GAI"ZF
GÀITXF

GÀITZF

r83

t2
t3

GATED SCLT

t8us 3l H
ltiL
iB DPA H

tBus lt

ABORT L

CilI BïTE CXTR EQIL

GAITNF

GAITZF
GÀITXF

GÀITZF
B

GAITZF

GÀITCN

GAITXF

r8a

iCT FIGURE I
PIN COXFIGURA?IOX DIAGRA|{

cir 3e H <---tet
crrl 3l H <--_ttz
orl 28 H <---te3
cfil 29 lr <---t0l
IBUS ll n <-->r05

a8t<--.- ctil BYTE CN.t EQ

{?t---> ABORT L
t6!<--> IBUS lt H
tst<--> iB DPA rl
ltt<--- ti t
tBus 6 n <-->106
a3t<-->
IBUS 3l H
REG CTRL GÀ E H --->t'?
.2t<--GATED SCLK H
m ctl cYc lt'<-->tc8
tlt<--> t8us 22 H
scl.x SYNC L --->te9
Itt<--- PÀR L
SILO CTRL iDP I H <---t lg .......
39t<--> StLo PAR I H
SILO CTRL rDP H <---tll
.
. 38!---- cRouf,D
'
t/GA ----t 12 . LrD . 3?t <-->
IIO PÀR E H
vcc ----t13 . DffN. 36t--->
OAD SILO H
STÀRT STOP ftB L <-->,tl{ .
35t ---- GROUIfD
REG CTRL GA 2 H --->i rs .......
3{t<--- DT FUtf I H
IBUS m H --->tt6
33t---> StLo ADDRESS I H
DT DIR H ---> t I?
32t---> SILO ÀDDRESS 2 H
tBus c H <-->ttg
3lt--->
srro ÀDDREss I H
2ND rBA CLr L ---> t 19
3OI<--- TBA CLK L
IBUS I n <-->tzg
29I---> SILO CHIP SEL E L
stl.o ctRL iDP 2 H <---t2l
28t---> sILo ÀDDRESS 3 H
srLo CHIP sEt I L <---t22
27t<--tÀsT TRÀ[s H
l|BÀ CLr DLï H --->t23
26t <--- REG CTRL GA I H
mFuNcH--->r2{
25t<--- Exc sYNc L
o

185

t. ta

trrbor Dte P.th Control (rE,

1.,

GITSNAL DSSCRI!).?IC

tE lr thc lrrrbur Drtr Prth @ntrol Chlp. lt corrttlna
a ray.n blt uP doUlr countcrr YAR (t:2). lt controlt tnd
It
rtlnt.lnt ttetus on t P Perty end iÀP vtl ldltt/.
dot.ctt thc bcalnntng rnd thr rnd of . Dete transfcr,
and rrlntrlnt rtrtut on thr srrcccta of Èhat trangfcr.
It conCrolr tnd relntrtnr tt.tu! on control bus prrlÈy.
It contrlnr vlrlout bltr of thc control' tt.tu3 end
rc lntrnancC r.Ít I rt.rr .
2.

?tntrorst
Sorr .tttc elc.Gntt aro dctcrlbcd by rlgnals prcflrcd by
SE?, LO,AD, Gtc. lf nonc of thero trc tru., thc elclcnt
door not changc ttatc.

SIGTAL DISGNTFIICS

3.t

rTA CII L
neA CLi L f

lE.
3.2

ts . tTL lnPut.

It ls the PrlrarY clocl ln

D? DtR l< Itl ?l|I <l.f> I

thc
Thccr tlgntls' tr. TTL lnpute. Thcy descrtb-e
pcrforrcd.
bctng
trancfcr
of
data
tyPc
thc
dlrectlon-and

m Fuf <l.ol >

DT IDLE
DT READ

ol
lc

3.2.1

DT Hrlte
TRITECI|ECf, (rCX'
Dt
lt
Dt tDLl lc a trtnllt rant latch, opcn rhcn tBA CLf L ls
hlgh.
DT

3.2.2

hrncÈlon

IDLE <-- (DT FUN (l:3) H 'O)

D? IIIT
DT

IXIT B r DT IDLE ll ' (Dt FUtl

TE IAELC I
Pll lóentlÍlcrtlon trÉ Grtc IypG
GAtt ttPS
PIT ID
GAtIïF
RE CTRL GA 2H
GAITXF
REG CTNL GÀ ,H
GÀIilF
TBUS U H
GAITZF
t8tfs 12 ll

5
6

TAP PAR L

PII I
I
2
3

rBus 29 f,

rBus 3t ll

REC iC PAR II

Rtn Ë

IBC L
88L SïXC H
Dt Bttsr tl

l9
20
2l
22
23

25
26
27
2E

3'
3l

32
33

--€,Alilf

PàR a-

t
9
It
ll
ll

GÀITZF

GÀIIïF

GÀItZF

nt? Írc PAR ll
IBrrs l7 tr

GAITÍï

GAIIZF

tDus t3 H
IBUS I

GAITzF
GÀITXF

GÀt"ZF

GÀlrrx
GAIilF
GÀITil

sctr sïïc L

GAIIïIF
GAIIPF

mFuxlll

GrltïF

IXTER L

GÀIIPN

SCLi GÀTE H

Grlrln

occ sYxc rl

GAItlIF

DIFUTOH
tBus 3l H
IBUS 6 H
t8rrs 2 H
IBI'S 7 H
rSus 3 Ë
START SIIOP NB L
iBA CLT L
DT DIR B

UPPER YÀR CXT EX L

36
3?
39

m Eusr oNEsllot sï.lfc tl

t,
ll

l3
ta

t5
t6

l7
a8

tBus 8 ll
IBUS

H
H

tBus 5
'
iÀP ERR L
rCtr DIF UPR L
rcT DIF I.r|R L
IBITS 9 H
tBus lt u
REG CTRL GÀ I
ÀBOR? L
DO CiI CïC rl

GAITïF

GAITZF

GAI?IF

GÀTTZF

GÀITZF

GAIIZF

GÀIIïF

GÀITf,F

GÀTilF

GÀI"TIT
GÀI?zF

GAIflIF
GÀITZF

GAIIZF
GAITNT

GÀIÍIIF

GÀIIïF

GAITZF

GÀIIZF
GÀTTI?
GÀITPF
GÀITCF

nEG CIRL GA (2:ll

3.3

l< llUS t

Rag. gmt GÀ (2:O) f, and IBIJS ffi H arc TTL IXPUTS. Tttcy

control loadlng and rcadlng vtrtous rcgtstGr blÈs ln
llE.
In addltlonr oDC codr ls llllT. Encodings are
dcgcrlbcd ln the teble bclor.
REG C?Rt GÀ <2:0) f,
IBI|S Fí R

ao
IORD

YAR H

CBT REÀD B
YAN E

stÀt n
TAIf,T H

tAPB
BrlE CXT H

.l
.

I
O2LD
L
.
EILD
I
.
l5
a6
t6RD
.7LD
t

I LD
2
3

RDYARII

tD STATUS H

I RDnAINTI
5 LD CTRL II

7 lNrt

RD STATUS I

3RD

r RD STAT H + LD CIPD READ H

t88

t.f

t!lf3 r I

tllf8 n I .r. la tlls?A?l trtnrlcvo3r.
rtnrleod tn tb. trbh btlor:
Drrbh
Dtr

III?

RD YAN tr + III?

TD YAR X + TIII T

Qpcrrtlon lr

RDYTTI'YAN2f
trtt I
RDYTR'YIITT

. RD UrR I + RD S?AtlrS I + tIIt I nD YAt
! . yAt I t +
tD gtAtts I . tr Y
rt?t
RD YAR E + RD STAITIS T + IIIT

I ND YIN T . YAN 5 ! +
rD stAttrs I . rAP ?C r

NDYTNI'YAR6!
IIII I
RDYÀNI.YIR7I+
RD VAR E + IIIT i
IIIT T
RD YÀR f, + RD STAfl,S T + IIIT T tD YAN I . YIR t [ +
nD arAns r . r? I
ND STTfi'S T ' TCT ERN
RD STATI'S E + IIIT T
tln f
rcT 8RR
RD STAIT'E T
RD StÀlrr8 Ë + IIII I
U?RT+IIIT8'
RD STA?US T ' DI ÀET II
RD STÀTI'S I + TII? Ë
RD S?AtrrS X . Dt C(nP
nD s?A?ns ! + rrlt t
f,+III?T
txttL.rcPtn
RD StA?ts X + Irl? i

RD YAR I

tt
t2

+ III? E

tÀIrt f, + lrlt f,
RD TÀIIT T + IIIT tr
IIlt Ë

IIY TAP PAR f, + IXI? H

IIY rcFG U

trt? I

ta9

a
l,

NE FIGURE t
PIN COIIFIGURATIOX DIÀGRÀII

I
---> t fl
I !
---> I C2
IBUS RïË ---> t a3
tBus 12a <--> t fl
IBUS 29U <--> t 15
lrAP PAR L ---> t f6
PAR B ---> r t7
IErfs 3tB <--> t tt
r|rT rrc PÀn I
<---t tg
IBIJS l7E <--> t lt aaaaoaa
tBus 13a <-->tll aa
YGA ----r l2 .LID.
YGC ----rl3 . DCI.
REC TC PAR T --->rll ao
IEUS U <-->tl5 oaaaoao
RID
' B <---t t6
gcu[ stïc
L ---> I l?
IBC L <---t lt
EBL STIC B ---> I l9
REG CTRL GA 2
RTG CTRt GA

DT BUST tr <--> t 2'
mFUtla --->.21
IITER L <---t22
occ srrc B ---> I 23

18 t <--> DO Ctrr CïC H
t7t <--> ABORT
l6 t <--- REG CTRt GA

t
I H
t5t <--> TBUS I' H
ta t <--> IBUS 9 tl
l3 t <--- TCT DIF t'R L
a2 t <--- TCI DIF UPR L
It t ---> TÀP ERR t
lfr <--> tBus 5 n
39r <--> lBus I H
3t r ---- GROUND
3?t
36t <--> IBUS I Ë
35t ---- GROUXD

3l I ---> UPPER YÀR CXT EX L
33t <--- DI DIR E
t2 t <--- NBÀ CtT L

3l t <--- STÀRT SAOP iB L
3tt <--> IBUS 3 rl
29t <--> IBUS ? [
28 t <--> IBUS 2 E

27t<--> IE|S 6 I
26 t <--> TBUS 3I B
25t <--- Dt Frrr t rl

sclr GAtt I <---t 2l

l9t

3.5

Ytt (!r2> n
YAR (8:2) B ls r

scven btt upldosr slznchronous counÈer.
It lc cloclad on the rlslng edgc of iBA CLtr L.
If LD YÀR A, VAR (8s2) B
COT XT UP VAR - Ill DIR ll . IXC VAR tl
COIINT IXI|X VÀR . Dt DIR L . ItrC VAR H

Ihero
IXC VAR B . DOIITG CII CïCLE H . IxV tAP L.

tÀP PE L'DO cic cYc L

3.5. I

UPPBN YAR CTI

UPPER VAR CXT EXLT a r totctpolc outPut.
UPPER VÀR CIt El|lr
t ( VAn <8:2 E . 7F)'
(VÀR (8: 2) r a
DIR tl t IxC VAR H

l.Dt

3.6

DT DIR H +

uPDttt lrP
UPDATE tAP tg .n cdg. trlggercd fllpflop elochcd on thc
rlslng edge of tBA CLt L.
SET UPDATE tÀP - UPPER VÀR ClrT EN n + DT llrlT H
CLR UPDATE IIÀP ! (RD TAP H + IXIT A}. .NOT.SET UPHTE
trÀP

3.6. t

ITY IÀP PTD
INV tÀP PEXD is a trtnsparcnt latch' oPen tf UPDATE t{AP

ll .

TBA CLT B.

IXV TAP PEXD <-- IBUS 3T L.

3.6.2

trY tÀP
IXV tAP le tn cdgc trlggcrcd fllpflop, clocked on the
rlelng edgG of IBA CLtr L. lÈ ls tsychronously sct tf
TXY TÀP PEI{D H ' DO CTI CTC H.
CLR lllV iÀP - Dt IxlT H + IXIT H + LD STÀTUS H t IBUS I
Ë

3.6.3

IIY IAP PÀR
llfV tAP P^R H ls en cdgc trtggcred fllpflop, clocked on

the rlclng cdgc of llBA CLK L.

l9r

LOAD ItlY ËAP PAR - LD iAIXT

<-- IBI'S 29
CÍn lrV iAP PAR . Ilrl? H '
TTIY iAP PAR

3.6.'

U)AD IXY iAP PAR

TTP PÀR L
nAP PAR L is a TTL lnput.

3.6.5

TTP P3 PTID
tlÀP PE PEI|D ls t Èr.nsparent latch' oPCn tf UPDA?E r^P H

. iBA Ctr H

iÀP PE PEXD <-- ttÀP PAR B

3.6.6

IXY iÀP PÀR L

NAP P3

tAP PE ls an edgc trlggercd fllpflop, clocled on thc
rlslng GdgG of iBA CLf L. lt ls .synchronously sct tÍ
ÍTÀP PE PEXD H ' DO CII CTC H.
CLR tÀP PE . Ilrlt H + m lxlt H + LD StAtUS [ . IBUS 5 n
3.5.7

tAP 3RN L
f{AP ERR L ls a toÈerpolc output.

IIAP ERR ]f . ;11P PE H + ITIV iÀP B

3.5.t

DO Crt CtC B

m Ctl CIC H llr en opcn collector transicver.
ft is
drÍvrn lou by ;t)C tt UPDATE nAp H + INV nAp H + iÀp pE
H.

3.6.9

3.7

u)IIG Cf,I GTC
DOTXG CÍtI CIC ls .n cdge trtggcrcd flipflop,
tho rlstng cdgc of iBA CLf L.
IDING Ct'lI CIC <-- DO CnI CtC H
EtL SrXe f,
eBL SYI|C H Ís à TTL lnput

192

clockcd on

3.7. I

lÀttcBED tlt

sïïc

IÀACNED EBL SYNC Is a

transparent D l,átch, open rhen

IÀTCIIED EBL STNC

EBL STI{C H.

CLf L lg lou.
3.7.2

PRSV ElL SIXC

an edge trlggered fltpflop'
thc rtslng cdge of tBÀ CLK L.

PREV EBCt SINC ls

clocked on

PREV EBL SYNC

3.?.3

TA DOTB

nB DONE ls an edge trlggered fltpflop, clockcd on the
rlslng edge of llBA CLÍ L.
SET llB DO}|E . PREV EBL SïNC H . EBL SïxC L t RUN L + ltxF

{T Dír IDLE L

CLR ltB mNE - DT IDLE H ' .NOT. SBT IB DOIfE

3.7. I

Dt BUSï I

trtnslever. It ls dr tven
m DUSI ll ls .n oPGn collcctor
lor by IDC lf iB DOI|E H r m C(nP H.
3.t

DI ABT

m ÀB? ls tn edge trlggercd fltpflop clocked on the
rlslng cdge of i8A CLK L.
SET Dt À8T ' nB mXE H ' ÀBORT H

ELR [}I ÀBT . (INIT H + t}f INIT H + LD STÀTUS . IBUS 12
H) t .XOT. SEI I}T ÀBT.
I

3.9

t.ttlctrBD ÀEont
tAtrCltED ABORT is an cdgc trlggered fltpflop,
thc rlelng cdgc of tBÀ CLK L.
IA1iCHED ABORT <-- ABOR? H

3.9.I

clock'ed on

PNIRUI AEON?
PRERIll ABORT ls an edgc trlggered fltPfloP,
thc rlslng cdge of nBA CLtr L.

clocked vlth

SET PRERI'I{ ABORT A LÀ?CHED AEORT L T ABORT H t RUI{ L '
PRERUX EX B.

193

CLR PRERUil ABORT I

(INIT H + DT INIT II + EBL SYNC L +
t
llXF L)
.NOT. SET PRERUX ÀBORT.
3. l,

STÀRT STIOP TD L
START STOP IiB L IS

3.tt.l

a TTL Input.

scLr GATE
SCLi GATE is an edgc trlggered fliptlop,
rlsing cdgc of tlBÀ CLX L.

clocked cn the

SET SCLÍ GATE - START STOP lrB H t DT FUU I H t ÀBORT L +
Dr INTT H ' DT READ H
CLR SCLX GATE SET SCLK GÀTE

(IIIIT H + ÀBORT H + EIiID HB DT H) '

.NOT.

lÍtrerc
EllD llB DTH - START STOP ltB H r DT READ H ' SCLÍ SYI|C H +
S?ART I.ITOP T8 L . DT FUN I H . SCLK STNC H + E8L SYNC H

. IBC H.

3. lr.2

T'T RUN

clockcd on the
rlslng odge of fr8À CLK L.
SET DT Rt,N 3 DT INIT H t Dt READ II + DT FUN I H T SCLK
GATE H t TÀTCHED ÀBORT L T END }IB DT L.
DT RUll ls an edge trlggered flipflop,

CLR DT RUN . (TXF H + LÀTCHED ABORT H + END IIB DT H +
IXIT H) I .NOT. SET DT RUI{.
3. lt.3

PRB-RT'X EX
PRE-RUN EN is

an SR lrteh.

SET PRE-RU!| EN ' llBÀ CLK H . DT RUN H.
CLR PRE-RIrN EN - llBA CLK H . ENABLE TIIIEOUT H

3.1t. I

RUI B
RUN H is

Èotenpole outPut.

RUN H ! DT RUN H + PRERUN ABORT H

3. ll

rcr Dt? UPR L. rcr Dr? trR L
taCl( DIF UPR L ÀND l{CK DIF Lt{R L are TTL inputs.

l9{

3. ll. I

Gt 3nn uPn r
ICt ERR UPn n lr.n cdge trlggercd fllpÍlop, cloclcd on
tho rlrlng rdgo oÍ tBA CLI C.
Stt ICr tRR UPR . SllR? StOP iB B + ODD LErc?H Dt t + D?
DIR Ll t ICr DIF UPR H . rcr C(nP EX B
Ihartc
rcf CGP EX ll - SCLK SfrC H r' PRERUT ABORT L .
DT TCT I

CLR ICf tRR UPR. (IXIT ll + m

lBus lrx, . .IoT. sET Icr UPR

3. tl.2

RUX H '

lItT ll + LD STATUS H '

rcr lnn lrn
ICf ERR t.IR ls tn cdgc tr lggcrcd f I lptloP, clocked on
thc rlslng cdgc of tEA CLI L.
SET TCT ERR t.TR . S?ART SlIOP TB H + ODD LETGIH Dfl L + Dt
DIR H I . rCtr DIF LrR Ë ' ICI CGP Ef, ll.
CLR TCT ERR I.HR I (IXIT tI + DT IXIT H + LD STÀTUS H.
IBUS 9 H) . .lfOT SET rcr ERR LrR.

3. t2

occ sïïc l, scLr srrc E, D? Blrsl otrBsnol sïrc u.
Ttrcsc slgnals arc TTL lnPuts.

3.12.1

ErÀBl't ?rtEout
EXÀ8LE ?IrEOUt ls an cdge trlggered fliPfloP,

Èhe rlslng edgc of IBÀ CLI( L.

clocked on

SET EXÀBLE IIilEOUT r DT BUSï H r DT IDLE H

CLR EIIADLE TITEOUT . (DT IDLE ll + OCC SINC Hl . .NOT.
SET EXAELE TIIIEOUT

l.12.2

tx?
nXF le an edgc trlggered Íllpflop,
edgc of tBÀ CLÍ L.

clocked on the rislng

sET ltxF . DT Busy oneshot syNcl r EIABLE TIIIEOUT H
CLR tXF. (IxlT
. .lfoT. SET tXF

ll + DT iriT H + LD STATUS H r IBUS I H)

195

3.lt

3. ll

InlN L
lI?Eh L ls .n opcn col lector ouSput. llf drtvcs IXTER L
lov if
(rIF f + ICPC ll + Dt c(nP a + DI ÀET NI O DT BUST L.
rDc, rtc L
IBC lr ea cdgc Èriggcrcd fliptlop cloclcd on thQ rising
cdgc oÍ fBA CLI L. IBC L is e totcrpolc outPut.
I.OAD IBC . LD CtnL n

Irc
Cl,R IBC .
3. 15

3.ls.l

3.15.2

3.15.3

PÀR f,

IXlt ll ' .llOT. t ÀD IBC

RBC IG PAP I

ttcsc slgnals .rc mL inPuts.
IIY rcFG
txV iCPS ls àn cdge triggercd flipflop, clocked on thc
rlring cdgc of nBA CLR L.
t OAD INV ilCFG . LD iÀtl|t ll
INY iCPG <- - IBUS 39 H
CLR INV PCFG r INIT H ' .llOT. LOÀD lXV iCPG

ntt re PÀn I
trfIT iC PAR H is a toÈerpolc outPut.
nlT nC PÀR H - PAR H 0 lllV iCFG ll
iCPE
l
ilCPE is an cdge triggcred fltptlop clockcd on the rising
edge rf tiBA CLK L.
sET ËCpE - LD CBDB H r INIT L . (pÀR H + REC iC pÀR L)
CLR NCPE a (INIT H + LD STATUS B i IEUS I? H) . .NOT.
SET I'ICPE

196

3.15
t.

i^SSBUS ntA PAttr (rDP' E6l5

GESnÀL DSSCtrPllOr:

Itrts spcclf lcatlon dcf incs the dctai I lequi relents Íor
VAX-Il/73e tDP gate .rray chip.

197

the

rDP

"tltE
Pln ldcntlflcatlon rnd Grtc tYpc
PIN I

PIN ID
DTFUNOH

}IBAH

GÀTED SCLK H

{

6
7

I
9
lo
tl
l{
l5
l6
l7
l8
l9
2e

22
23
24

GATE

GÀITNF
GAITZF
GAITNF
GÀITZ}

}TBIH
STAVE READ L
ltlr L

GAITNF
GAITNF
GAITCN
GÀITTN
GAITNF
GAITZT

IíCI( ERR L
PAR H

IIBA CLK L

clrl c H
clrl I H

CBOH
CBTH
IBUS 16 H
IBUS 17 H
IEUS C H

TRA SYNC L
ADD COIIP O H

IBUS I

REG CTRL }TDP

REG CTRL IIDP c

IBUS RtÍ H

PIN I

COITI|ENTS TYPE

GAITZI
GAITZF
GAITZF
GA ITZ T
GAITZF
GAITZF
GÀITNI
GÀITPF
GAITZF
GAITNF
GÀITNF
GAITNF

r98

23
26
27
28
29
3C

32
33
34
36
3?
39
4C

4l
42

PIN IE

GATE

EO}TlrENTS TYFE

ADD COilP I rl
ÀDD COTP 2 H
SCLK SYNC L
ItB BYTE CNTR Ei. I
I,IB CRY IN H
l,lB CRY OUT H
CNI CRY IN L
CIII CRY OUT L
RgG CTRL liDP 2
ClrI BYTE CNTR EC I
}TtsÀ INIT L
cËI l7 H
clrl 16 H

VECTOR CYC L

SILO CTiL FIDP I
IIBÀ DEBZ H

DO Ci. TIASTER L
SILO CTRL }TDP C

46
47
48

SILO CTRL ITDP 2
SILO O H
SILO I H

{3
tl5

DTFUNIH

GÀ I TPt

GAI TPF
GA I TNF
GA ITCN
GÀ I TNF
GA I TTN
GAITNT
GA ITTN

GÀITNT'
GÀITCN
GAITNT
GÀ ITZ T

GÀITZ}
GÀ I TNF
GA ITNF

GAITNF
GAITNF
GA ITNE'
GÀITNT
GAITNF
GA ITZ F
GÀ ITZ F

Perforrancc Requl rcrcnts :

2.L

GBXERÀL

rDP ls the tlBA data path chip. It routes data betueen 5
trisÈate ports. It supplies one pariÈy output used for
a variety of registers and porÈs dependent on eontrol
signals. One outPut Provides equals checking on tuo of
the data registers. ï\,o 2-bit eounÈers are included.

Loglc is included for address conParÍson to the cfll
port.
3 bits of ID are latched internally aÈ
ini tial i zation.

2.1.1

TENTINOLOGT

Ttre next state of state elencnts is sonetines described
by slgnals such às 'SET xxx'r 'CLR xxx', and 'TOGGLE
xxxt. If these signals are true, that element is set,
cleared or toggled respectively. If none are Èrue, the
elenenÈ does not change state.

2.2

DATA PORTS

All daÈa ports are high asserted and Èristate.
l7r16,l,0
l. Cl,lI 4 bits
l7r16,lr2
2. rBUS 4 bits
l,g
3. SILO 2 bits
llB
bits
lr0
2
4.
1,0
5. CB 2 bits
2.3

2.1

2.5

cLoctrs

1!o clocks are input to ltDP. ttlBÀ CLK L i s the pr imary
clock. lrtosÈ of Èhe state of llDP is latched with the lou
to high transition of rBA CLK L.
GATED SCLK H is used for clocking the regtsters on the
input and outPut of the xB Port. Clocking is done uith
the high to lov transltion of GATED SCLK HINIT L
The assertion of INIT L initializes some of the state
is fully described in
elenenÈs of flDP. InÍtiallzation
elements.
state
these
later sections for each of
COXTROL PIELDS

Operation is
There are three najor control fields.
surrtartzed in the tables belor, and fully described in
the later sections.

199

2.5. I

2.5.2

Dt FlrI <l:t) ll
gC
IDLE
DT READ
OI
IC - DT HRITE
DT HCK
II
IBUS T tr T RBG CTRL TDP <2:I) I

o-o

O-I
g-2
c-3
O-4
0-5
0-6
C-7
l-0
l-l
l-2
I-3
I-4
l-5
I -6
l-7

NoP
IBUS
RESERVED
IEUS

CtrI OBUF <- Eyte Counters
ByÈe Counters <- CnI IBUF, IBUS
CTI OBUF<- CËD ÀDD REG
CBDB

clrl oBuF
clrl oBUF

Cl,lI OBUF
CT,ID ADD REG
CrrI OBUF

ct{I oBUF
Ctr I OBUF
cl{r oBUF
Operation is highly dependenÈ on ID.

2.5.3

SILO CTRL iDP <2:C) B

Ttris field is used in conjuncÈion uith DT FUN I H.
DT F'UN I H STLO CTRL IIDP
NoP
o-0
SILO
C-I
RESERVED
A-2
SIIDB < - l4DI8, Gen PAR
0- 3
SCDB tO <- SILO, Gen PÀR
O-4
SCDB LO <- SILO' Gen PÀR
0-5
SCDB HI
A-6
SCDB HI <- SILO' Gen PÀR
e-7
NOP
t-9
srlo
l-l
l-2
Gen PAR on ÈrDI8
SIiDB <- SILO, Gen PAR
l-3
SILO <- SCDB LO, Gen PÀR
l-{
SILO
t-5
SILO
<- SCDB HI, Gen PÀR
l-6
SILO
I-7

290

2.6

l{hen llh L is asserted, the drivers of CB (l:C> H and ItB
(l:0) H are enabled.

2.7

llDP contains thrêe bits

2.8

2.9
2.9.1

of tD.

These th(ee blts

àre

held internally in latches. ID <2:C) is latched ritl,
Ttle laÈches are open vhen
the data on IBUS (l7rlr0).
IIIBA CLK L is lor and INIT L is lov.
CII IBUF
Ct{I IBUF is a four bit transpàrent latch. ft is open
during the lou pulse of ÈrBA CLK L if DÀTA CYC H is high.
CfrI IBUF n H is loaded uith CÈl n H respectively, uhere
n = Otl,.16rl7.
Cl|l OUTPUT rUX r Cit OBUP
l|la Cf,I OU.IPUI tUX atce!3 co .ndladdress. datr. .nd
vector into the CllI OBUF. Ttre CllI OBUF is a transParent
latch rhich is open durlng the lor pulse of lrBA CLK L if
IÀTCH Cl,lI OBUF EN is asserted.
LÀTCll Ctit OBUF EN . S|AVE READ ll ' DAIÀ CIC Í + Cnl CrD
EN H + trÀSIER DÀTÀ ClC H.

fhe Càt OUTPUT itUX ls controllêd by nEG CIRL ltDP <2!e>
H, IBUS Rt{ H, VECTOR CYC H' CllI CllD EN H, and ID as
shorrn in Table 3.3.9.

VECTOR OUT EN = VECTOR CYC h ' llÀSTER DATÀ CYC H
SCDB OUT EN = VECTOR CYC L ' ilÀSTER DÀTÀ CYC H rDT FUN I

LTDTFUNOH

2.9.2

oUtPUl ElliLEs

Ílle c}lt oBUF is assarted on the cttl thÍough trt-sttte
enlbles ate
drlvGra uhen enabled. the output ls
lor. CÉl
rhen
|lBÀ
CLK
L
open
laèches,
trlnspar.nt
indePendently.
àre
cn.blêd
<17:16>
<l:0> and CfrI
SET CIt lre OUT EN - Clll CllD EN ll + SIÀVE READ H
c,.n cÍ,rt r:r our Eir . (DÀrA cyc L + Dr FUN r H) . .Nor.
SET Cil 13, OUT EI
SET CáI l?3f5 oUT Ell = CÍít ctlD EN í r (ID 5 5) + sLÀvE
RAAD T

CLR Cit l?:15 OU! Etl - (DÀTA CYC L + DT FuN I
sEl Ctrt 17:16 OUt Ex

t1 I .vot.

lhe outPut rnrblea rre clêared laynchronously by INIT.

2et

z.ta

crr corrRot. srAtE
there .Íe Íoul edge triggered Ílip Ílops that àt€ usec
to control PuttÍn9 eontrol/data onto and receivlng
Ther- àre clocted on tl,e
contÍol/deta ofÍ thc CiI.
positive 9oin9 edge oÍ ibA CLI( L.

2.la.t

ADD ClC Fos -

Ult

CIC

ADD CTC POS <- TBA DEÉZ L
DÀTA CYC - .NCï- ADD CYC PcS

2.1a.2 ctl ctD Er

2.1r.3

citl cttD Ex <- ibA DaEz L. lIIl
iÀStER UtA eïC

IIÀSTER DATA CTC
vEcToR cïc Hl

2.lr.a

tD Dfl ?gD

L. Do CFI Fr.S?Ei H

SET RD D TA PEXD. CllI CtD EN H. DT tUI I H
CtR RD D^TA PEID r (lbA DÉBZ L o INIT) ..NoT. SEï RD
DÀTÀ PEND

2.tl
2.ll.l
r

altl couÍllls
lD? cont.int 2 tE-bit counteÍs - thc tB IITE COUXTER

and the CnI BïTE COUNTEIi. They arc loaded
siaultaneouslyr but increlented sapàrately.
The
fol louing signal pins àre associated rith the BYTE
couxTERs.

SIGNÀL PTN

DRIVE/REC ÀSSOCIATED COUXTER

FA CRY tX ll

R
D(ttl
D(oc)
R
R
D(?tl
D(OC)

rlB cRY OUt n

iai BYTE CNTR E0 -l H
sc Lt( sYl{c L
clll CRI tN L
CàI CRI OUT L

orl ByTE CNTR EQ -l lr

li: ;::Hi;:ïr.ï

ÍrB BIIE COUIIER

tr8 BYIE COUXTER

iB attE couxTER
iB BttE coutTER
CïI BItE CoU TER
Cil BftE COUIIER
Ott BITE COUXTER

occut on
'"'nt"s
"'ot#'or"r"in:,.:ï:

2O2

2. ll.2

LOADING COUNTERS

ttte counÈers are loaded f rom the CtlI IBUF if
tfDp . 5l t (IBUS RIJ - Ol
IIB BrlE CNTR E <- CIII IBUF O
NB BTTE CNIR I <- C}TI IBUF I
CIII BTTE CNTR E <- CTII IBUF g
Cl{I BITE CiltR I <- Ctll IBUF I
2. ll.3

(REG CTRL

ITRITS||TIIIG COUXTERS

TOGGLE iB

sïl|c H

BYIE CNTR O a rrB cRY IN H r (lD | 0) r

TOGGLE flB BffE CNTR !

+ID=Ol'SCLK

TOGGLE CI,II BïTE CNTR O H

AOGGLE CI,II BYIE CNTR t =

[ (ilB CRY IN H .

SCLK

rtB BYTE CNTR 0

SYNC H.

CIII CRY IN H T SILO CTRL I,IDP 2

cltr cRy rN H r clll ByrE cirtn r

rSILO CTRL }TDP 2 H.
CLR l,rB BftE CNTR 0 ! (lrB CRY IN l.

(lD - Ol r SCLK SYNC

2. ll. I

RBSIRICIIOX Control states that increatent and load
slault.neously are illegal' ànd lead Èo unPredictable
resul ts .

2. ll.5

cot xlER olrtPuTs

ËB CRï OUT H - (I{8 BYTE CNTR g H + (ID ' O)) '
rrB BYTE CNTR I H r (ilB CRY lN H + (ID . 0) )

l|B BffE CIITR EQ -l H ! (HB BYTE CNTR O H + (ID = 0)l '
IIB BTTE CNTR I H

ClrI CRI OUT H - CltI BYTE CNTR I H t
CTIII 8ïTE CXTR O H. Cï{I CRY IN H

CtiI BffE CNTR EQ -l H - CllI BYIE CNTR I H '
O,II BYTE CXTR E H

2.12

CBnBSCBDB
or
cBD ls an edge trlggered 2 bit buffer. [t can drive
U" loaded fról CB n- H. ÀdditÍonally Ít can be loaded
frol CiI IBUF. tÈ ls clocked on the rÍsing edge of llBA

CLK L.

CBDB <- Clrt IBUF if
CBDB <- CB N H tf

(REG CTRL llDP - 7l r IBUS RIJ L
TRA SYIIC H. SI.AVE READ H

203

n H are tri-sÈate slgnals, enabled (CB OUT EN H + ltË

CE OUT EN ls en edge trlggered flop clocled by the

rlslng edge of ltBÀ CLK L.
SET CB OUT EN r (REG CTRL rtDP r ?, r IBUS R{ L
CLR CB OUT EN - TRA SINC H . .NOT. Í (REG CTRL tlDP = 7l
.rBus tr Ll
CB OUT EX ls
2. l3

asynchronously cleared by INIT.

IIUE n f,
IBUS n H (n a lTrl6rlrG)

ls t tri-state

bidirectional

IDP asscrta the Clf l IBUF onr:o the IBUS vhen IBUS

Port.
U L ' REG CTRL IIDP O H.

2.ll

scDB

a four bit edge trlggered register clocked uith
the rlslng edge of nBA CLK L. It is trctÈed às one
re9 ister vfren load ing Cron or read ing to the ClrI. It is
treatcd as tuo règisters, SCDB LO - SCDB (I:e) t SCDB HI
a SCDB (l?:16), vhen loading froa or reading to the

SCDB ls

SILO.

SCDB <- CllI IBUF if RD DATA PEIID H.l
SCDB t.o <- SILO <l:e) B if SILO SCDts EN t SltO CTRL iDP I L ' DT FUN I L
SCDB lll <- SILO <l:0) H if SILO SCIE Ex ' SILO CTRL nDP I H ' DT FUN I L
uherc SILO 9CDB Ell - SILO CTRL tlDP 2ll ' (SIIO CTRL l{DP 0 H a lD 2 Ll

RD DÀTA PEI{D H and SILO SCDB E}l belng both asserted is an illegal

control gttte.
SILO (l:!) f,
2. l5
SIItr) (l:e) H is a btdirectional trl-state port. It is enabled if:
(SILO CTRL ltDP (2:e) r rt

+ (DT FUN I H r SILO SCDB EN)

Ihen enabled,
SILO (l:C) ll <- SCIE Hl tf
SILO CTRL NDP 2 H ' SILO CTRL IIDP I H

SILO (l:e) H <- scDa Lo if
SILO CTRL ËDP 2 H ' SILO CTRL }TDP I L

SILO (l:0) H
(SILO CTRL tlDP <2zA) - f )
SILO (l:e)

B <-'e Íf m FUN I H I

(SIIO CTRL llDP (2:0) = f l

2.16

StrDB

SIIDB ls a 2 btt edge triggered register
rislng edge of lrBÀ CLx L.

clocked uith the

Sllt8 <- trDIB if (SILO CTRL nDP -3) 'DT FtN I L
SlrDB <- SltO (l:e) H if (SILO CTRL iDP - 3] ' DT FUN I H
2.L?

TDIB

IrDIB (l: g) ls a 2 bit edge trlggered reg ister clocked
rÍth the falltng edgc of GATED SCtf H. Tlre input is iB

(l:0) H.

2.lE

iDOB

ftDOB (l: e )

2.19

ls a 2 bit edge triggcred reg ist€r clocked
wlth the fall lng cdge of GÀIED SCLtr H. Ttrc input ls
SiDB. < I:0 > H
tB <l:!) A
llB (l: e ) H ls a btdt rectlonal Èr l-sÈtte Port.+ tttc
ll ' DT Fulil 0 Lf ilt H.
drlvers are enabled if (DT FUX I (l:e)
H.
then enabled, tB (l:C) H <- IDOB

2.2a

rcr ERn t
ICf ERR L ls .n oPen collcctor slgntl.
UCf ERR t ls assertcd uhen nDIB (l:0) I SIIDB (l:0)

2.2L

PAN B
PAR H ls an totelpole slgnal utrlch ls equlvalent to odd
parlty generatlon. The-data selectcd is shovn in the
table belou.

COTTROL FIELDS

DÀTA SIGNÀLS

(SILO CTRL IDP (2zO) r 3l t DT FUN I H
(SILO CTRL ËDP <2:e) a 3l r DT FUN I L
(SIrc CTRL llDP (2zO) r l)i r DT FUil I H

SILO (l:0)

DT FI'N I H ' SILO SCB EN ' SILO CTRL IIDP I L
D" FtX I H ' STLO SCDB EN ' SILO CTRL'}IDP I H
DT FtN I L ' SILO SCDB EN

ilDIB (l:0)

HDTB (I:O)

H
H

H
SCDB (l:0)
SCDB <l?: 16) H

SILO <I:0)

UhErE SItO SCDB EN I SILO CTRL }IDP 2 H ' (SILO CTRL IIDP

eHalD2Ll

InanycontrolsttteotherthanÈhoselisted,PARH<

205

2.22

ADD CCP <2:t) A

H .re bidirectional signals used for
corprring ciI lddrcsses, letching Pàrt of thc ciI
address, and for inputing tha vcctor valuc to FDP.
operation ls depcndcnt on tD, YEctoR crc L. ADD CrC FOS-

ÀDD CGP (2: t)

Sce lrDP Table 3.

ÀDD C(nP (2zC) ll are oPCn collector

drivcrs.
In IDP TÀALE 3, OUTPUT irplies thtt Èhc veluc of the
output ts latchcd. lt|c latchcs .ra oPCn rlrcn tBÀ cLI L
ts lor tf ADD CIC FoS H is high. lrotc th.t thc latch
c.n bc lrtchcd lor if thc ouÈPut is bclng pullcd lov by
anothcr dr tvcr r GV€o i f i t rculd othervÍsc be l.tched
high. llfPUT irpl lcs thet thc drtver is dlsebled.
-

2.2t

qq/ADD REG

í
CnD/ÀDD
CID/ADD REG ls a Íour bit tr.nsP.rcnt rcÍristcr.
It is
<l?:16, l:t) is loadcd fror IBUS <17:16, l:t).
opcn rrhcn rBA cLi L is lor iÍ (REG CTRL iDP -3) ' IBI'S

mH.

206

2.2a

l/o srcfArs
I OF PINS

STGIAL XATE
ADD CGP n B

IBIIS n B

o< n
ll . l7;16, l, o
llr
orl

CEnË
ECÍ.r Srrrc L
ra cRI II ll
rB CRT OUT H
tB BItt cxTR EQ -lH
CNI CRI IX L
CTI CRï OUT L
ct|I BrlE CXTR EQ -lH
SIU) CTRL tDP n lt

SILO n ll
G^IED sCLr H

lB'n H

PAR B
WCT ERR t
REG CTRt tDP n H
TBIJS T H

CTInH
SIÀYE READ L
IXIT L
DIFUXnH
HL
rBA C$ r
TRA SïXC L

NBA DSBZ H
DO CIII TASTER L
I'ECIIOR CrC t
TOTAL

ocn<2

nr drl
n r Orl

osns2

n 8 l?r16rlrC
ntlrg

TïPE OF IlO

XCEIVER-OC

XCEIVER-3 STÀTE
XCEIYER-3 STÀTE

I
t

RECEIYER
RECEIVER

I
I
t
I
I
I

DRIVER-TT
DRIYER-OC
RECEIYER

DRIVER-TT

DRIVER-OC
RECEIYER

XCEIVER-3 STATE

RECEIYER

XCETVER-3 STÀIE

DRTYER-TT

I
3
I
{
I
I
2
I
I
I
I
I
I

mIvER-(rc
RECEIYER
RECETVER

xcErY-3.srÀTE
REEETVER
RECEIVER
RECETYDR
RECEIYER
RECEIYER
RECEIVER
RECEIVDR
RECETVER
RECEIVER

-Tr

2a7

{tt<--> stt'o I H
i8 e H <-->t02
a?t<--> srLo t H
GATED SCL!( H --->te 3
a6t<--- srlo CTRL iDp 2 H
i8 I r <-->tet
a5t<--- DT FUU I tl
stÀvE READ L --->tts
{at<--- sILo cTRr rDp 0 H
ri L --->t36
t3t<--- Do qt rÀs?ER L
rctr ERR L <---t97
iBA DBz H
a2t<--pAR H <---tet
alt<--- stLo erRL iDp I ll
iBA CLX L --->rrg
ae r<--- yEcïoR ctt L
orl c H <-->tlo ....... 3gt<--> qt 16 H
cil I lt <-->tlt .
. 38t---- GRouxD
lrGA ----tt2 . LID . 3?t<--> Cf,I l7 U
trcc ----tl3 . D(tt. 36t<--- tBA IxtT t
cB 0 H <-->tll .
. 35t---- GRotxD
c8 t H <-->t15....... 3at---> crl BrlE cxtR EQ I
rBus 16 lt <-->tt6
33t<--- REG CÍRL iDp 2 H
t8us 17 H <-->tl7
32t---> cil cRï ouT L
tBus c H <-->ttE
3lt<--- crr cRy Ix L
TR,À Snrc L --->tlg
3ct---> iB cRI ouT H
ADD COrP C n <-->t20
2gt<--- 18 Ci, Ix H
tBts I H <-->t2l
2tt---> iB 8rlE cxtR EQ I L
REG CTRL rDp I $ --->t22
2?t<--- SCLr Srxc L
REG CIRL iDp 0 H --->r23
26t<--> ADD CGp 2 H
IBUS ffi H --->t2a
25t<--> ADD CGP I ll
DT Fl,U 0 H --->!tl

iDP FTGURE I
PIN CONFIGURÀTION DIÀGRNI ÀND PIN IDETITIFICATION

20t

rDP tÀll,B 2

TDP CIIP SPEC

Ylqron crr

ntc ot ?
ttt S gtnL

cf,D
tr

EDtllDrotltl.trc
X. X. a
I

olrr

>{
rl

X.
Xr
X.
9

Xr
X.
Xr
{

e
O
I

I
|
t
I

I
2
2
{

O
e
e
O

e
e
e
e

16 I
S3 c
>{ 3
?r c

2zG C
0
7

I
I
I
O

t
0
C
I

53
X

O
C
0
A

O
CTBER e
C
e

a
e
e

X
X
X

C
A
e

(l:O) <- ÀDD C(nP (l:e) l|
CrI GUX <l?: 16) <- rB 8ïTE
cr?R (l:t)r cnt (nul (l:e)
Cf,I BYTE CXTR <II'>
Cf,I GUI <17: 16) <- CD,/ÀDD REG
(l?: l6r l:t)
Ctl (nux (l?:16' l:0) <- 0
Ctrl OIUX (17:16r l:3)

<6 s

;11'àiut:!i:r6)<-e,cirorux
(l:

<'I e
, s c o
g
l
l

CnI (nUX (17:16, l:t)
CID/ADD REG <17:16r l:0)
Cf,I (nUX (t7:l6r l:l) <- e
Ctl (nUI <t7: 16r l>
GUX <t> <- ADD C(NP H
CtI (nUX (17: 16) <- O,
' CHr (IrUx

5
!
5

e
e

cnr (nux (l?r0>r rBus <17-0> cËr
(nur <16r l>
CrIcrux<17:16)
(l:9)
CtI GUX (17:16r l:0) <- 0
cir onux <17:16> <- IBus
ctrl ciux (I:t) <- ;DIE
:il;ltr,
CiI (nUX (17:16r l:0>

$i:ilh]jli*'o,li,'.,ï::o
CllI(nUX(l7rl:0)

<l?rl:e)r CllI qiux <16>
cl|t C|ux (I7'e>,lBus <t7.e> cnl
o{ux <l6rl>

2e9

tDP IrlLB 2 (Cont,
rD? crtP 6Ptc
YECIOR

tlnS RBG OT'?
il
etnt tr
E

rD? r

ctI

8CD

cf,D

8I
I

OU?

r
I

O
e

I
I

3:5

21617

I
xr

OTHER E

xreex

O
I

o?cm?tc
Ctl (lUx <17: 16)
(17:16)r Oll (nUI (l:9) <- iDIB

(l:t)
CrI (lUI <17: 16)
(17:16)' Gl GUI (l:0) <- CBID
<l:3)
CtI (nUX <l?:16> <- g, Ctt (l|UX
(l:t) <- cBr (l:e)
(nur <l?>
t crl(nux
<16>
crt
(l:l) <- CBDA <l:O)
T'TDEFTXED

CilI OIUX <17:16r l:3) <- SCID
<17:16, l:0)

It ls not lroo3tblc to havc roro than on of YECSOR OUT EllrCiI CnD Eill
or SCBD Ell agcerted rt one tlec. IÍ onc of thege threc sl.gnalr ls
assertedr IBUS ff H and REG CTRL iDP rust bc O-e, C-1, e-2, 0-3r
e-So g-7 ot l-3. Àny otlrer corblnatlon lcads to unpredictable
resul ts.

2le

DIrlrIT
D Cttt 3E
ID

AD YTCTOT
ctc qrc
rD GC" 2
t6
I

rD Gn" I

rDGC'

OUTPUT OII< T? H

outPrrt <- cll

lf,

of,

outPL,t <-or

.cËIt6L

ou?Plrt <- Gl

outPrn <-cnl 17 L

outPrJt <- crl

outPrn <- crt t? ll

ou?Put <-qt

af,
ot tPttt <- otl

ouTPrrt <- qt

l7 H

outPut <- crl

outPur <- cir

{

outPut <- orr l7 H

ouTPuT <- cnt

ouTPut <- orr

OUTPUT <- CIII I? H

ouTPuT <- cnr

OUTPUT <- orl

ouTPuT <- CllI l7 H

OUTPUT <- qI

IXPUT

.ctt16L

.ctt16tr

.cËr16n

r ctrl 16 H

. (Cit
lH-ADDCGP0

oll
efl

H)
o

ouTPuT <rcHr16H

clrl l? H

ouTPuT <- Cnr
I H . (CtrI

INPUT

TNPUT

INPUT

OUTPUT <I.ÀTCHED VALUE

ouTPuT <-

eH-ADDCOIP
0H)

OUTPUT <- IATCHED
VALUE

OUTPUT <- T.ATCHED
VALUE

2rl

LÀTCHED VATUE

3. 16

rEroRï DITA REGTSTER (rrDR)

GEXTRÀL DESCRIPTION:

Ttrls speclflcation deflnes the detall requirenents for a llemory
Datr Rcgtster chip (iDR). The trDR chlp is à { bit sllce vhich
accorpllshcs data rouÈlng and alignnent funcÈlonsr on one blt per
bytc of data, betueen the naln CPU data pàths and the memory
lnterface.

2r2

TDR TAI!,8 I

Pln ldentlftcatlon and cate ïYpe

tt
IPIN T I PIN ID
ll
l2
l3

ls
l6

t?
l8
9

le
ll
l{
l5
;.ó

lr7
lr8

l19

420

l2r

122
23
24
25
26
27
2E

azg
iTi
irr
32
]3
3I
136
13?

irg
llo
!{r

I coillTENTS

trl

BCTKL

ADD REG ENA L
ENA C}T t L

GAITNG
GÀITNG

PCOgH

GATTNG

PCOIH

GÀITI{G
GÀITNG

XB SELECT H

GÀIT1r|

XBUF OO H
SNAPSHOT CtiI L

GAITNG
GAITZG
GÀITNG
GAITNG
GAITZG
GAITZG
GAITZG
GAITZG

,GUF 08 H

DBUS ROT SO H
DEUS ROT SI H

clr 24 H
crl t6 H
crr 08 H
cneeH

rfB ee H
TB 08 H
ríB 16 H
r{B 24 H
CACHE 24 H
cÀcHE 16 H
CACHE 08 H

GÀITNI
GAITNI
GÀITNI

CACHE OO H

Àt|ux sEL s0 .ï
I Altux sEL Sl ].

lPDeSH

IPADIGH

IDBUSSELSOH
IDEUSSELSIH
ICHIPIDH
I|iÀDOEH

lilADloH
lrADeSn
I r$|ux sEL S0 H

{5
16

I|rÀD2{H
lr|Bl6L

IIIBUSETAH

ltrS 21 L

I GATE TYPE
I GAITNG
I GÀlTtilc

CLtr SEL SO H

142 lrrBgo'13
IFIUXSELSIH
aa lrrBoSL
a?

GAITNT
GAITZ I
GAITZ T
GAITZ I
GAITZ I
GAITNG
| GAITNG

lcAlrzc

I
I
I
I

IGÀITZG
IGAITNG
IGÀITNG
IGAIT}IG
IGAITNG

I
|
|
I
I

lGÀlTzN

lGAlrzN
lGAlrzN

I
I

213

lGAlrNG
lGAlrNG

| GAITNG
IGAITNG

f GAlrzN

IGAITNG

IGÀITNF

I
I

FcrÍonrnco3

Ttre iDR ChÍp shal I interf ace to the

It;TfoEfi'tTusses :

A. lnpuÈ Bugscs:
(hB 24 n, HB 16 fi, tfB eg H, 5B 0c Hl
IBUS
(rAD 21 H, fiAD 16 H, rÀD 0g H, ËÀD cc Ht
nA BUS
B. Output Bus:
(-tí8 24 H, -tB 16 H, -r,tB CB H, -t!ts ÍrC H)
IIEUS
C. Bidirectional Busses:
PA BUS (PAD 16 H, PAD C8 H, PÀD CO
'r
cAcHë BUS (CÀCHE 24 H, CACHE 16 H, CACHE ee h, CACHE
e0 H)

ctri

(clr 24 H, cr 16 H, clr cp H, cl,| 0g H)

xB DECODE (X8UÊ' C8 H, XBUF 00 H)

H is bi-directional; XBUF C8 H is
input only.
Besides these external buses, tbo internal vi red-or
buses, the DBUS and the CBUS uill be referred to in this
descriptlon. AÈ a given tine, the DBUS nay source one of
the follorlng:
À. ïÍBUS
B. OTI DATA
C. CACHE DÀTA
D. Byte I of the XB DECODE Bus on byte g
Zeros on bYtes lr 2, and 3
Ttre CBUS provides the input to the ClrI drivers and mày
contaln elther an address Éron the CÈlI ÀDDRESS REGISTER
or data fron the l{DR.
Ttre cloch available in the tlDR chip is 6 CLK L.
Regtsters and control stgrrals ordinarily change on Èhe
lor to high transitions of B CLf L.
NOTE:

2.1

XBUF l6

211

2.2

Shall be as specified herein.
Chtp llo Stnry:
Para. 2.3 for FunctÍonal Descrlptions.

S'ee

CHIP l,/O SU0riÀRY
Forcr,/Ground

mus (r8 2a H, HB 16 H, rB e8 h, rB oe Hl
||Bus (-nB 2a H, -||E 16 H, -}lB 08 H, -iB 0e H)
iA BUS (l|AD 2a H, iAD 16 H, rrAD e8 H, lrAD 0C H)
PA BUS (PAD l5 H, PAD 08 H, PAD C0 H)
cAcHE BUS (CACHE 2l {, CACHE 16 H, CACHE 08 H, CACHE C0 H)
cïft (cl| 2l H, ctt 16'., ci 08 H, cÁ go H)
xB DECODE BUS (XBUF t8 H, XBUF e0 Hl
B CLI( L
CHIP ID H

ÉBUS ENA H
EXA CilI L

SNÀPSHOT CÈI L

ÀDD REG ENA L
XB SELECT H
DBUS SEL S<l:0) Íl

llt'luX SEL S<l:0> H
ÀlrUX SEL S<l:e ) H
IDUS ROT S<l:0) H
CLK SEL S<l:0) H

2 pins
2 pins
2 pins

PC <el:Oe) H

2.3

I pins
4 pins
€ pins
I pins
3 pins
4 pins
I pins
2 pins
I pin
I pin
I pin
I pin
I pin
I pin
I pin
2 plns
2 pins
2 pins

?UICTIOXS:

IJBUS: Tte fíBUS nay be sourced onto the DBUS f ron rhere
it nay be ur i Èten Èo the WDR or the llDR, or dr iven to
Èhe PÀ 8US.

XB
rBUS: The IIBUS nay souree l{À BUS, PÀ BUS, l'lDR or The
ltultiplexer.
liBus
depending on the steering of the
IIBUS is active loY.
t
hA BUS: The ilÀ BUS may be sourced onto Èhe |IBUS or Èhe

PA BUS.

The PA 8US is a bi-direcÈional bus and may be
sourced or dr iven f rom Èhe l{DR chip. If dr iven
erternally, it nay be sourced onto the IIBUS or uritÈen
to the óf ADDRÈSS REGISTER. If d r iven f rom Èhe l{DR
the
chip, it tray contain the contents of the l{A BUS,
LÀTCh,
CtrI
DÀTÀ
Èhe
DBU-S, the Ctlrl ADDRESS REGISTERT o!
depending on the steering of the PA 8us ITULTIPLEXER.
pA 8US:

the CACHE BUS ls a bi-directional bus used
to urite data fron the WDR to the cache or read data
fron the cache onto the DBUS.

CÀCHE BUS:

215

Cl|l: ïtre Ctrl Ís a bi -dÍ rectional bus used to transf er
data fror the CBUS (either address lrol the Cl|t ADDTESS
REGISTER or data fror Èhe IDR) to DGtoÍ) or Cata from
rerror1l to the DEUS or into the CnI DATA LATCH fror rrtr€Í€
it nay be sourced ontc the PA 6US
xB DECODE BUS: Byte A oÍ the XB DECODE BUS is driven
fro!| byte e oÍ the xB RoTÀToR. Eyte I of the xE DECOEE
It E.y bG driven Íroa bytc I of
Bus is bi-directional.
the XB RCTAÍOR or it nay source erternal data onto t1-te
o of the D8us.
nost state elerents in the iDR chip change on
B CLf L:
the lov to high Èransition of B CLf L. Ccrtain control
signals and the Cil data lincs arc latched during I CLf
L lov tile to ensure thàt they do not changc inside the
iDR chip before Èhe lou to high transition of B

CLX L.

h'hen CHIP ID H is high, the drivers for
both bytes g and I of the PÀ BUS are eont inrrcusl y
enabled (except vhen the PA BUS ls being sourced onto
the trBUS). Ihen CI|IP ID H is lou, only the driver for
byte c of the PÀ Bus is continuously enabled (except
rhen the PÀ BUS is oeing sourced onto the ËBJS).
l{BUS drivers in the llDR chip are
trtBUS ENÀ H: HIGH enabled
Ltl{ - IIBUS drivers in the llDR chip are disabled
The CtlI drivers can only be enabl-'d or
ENA Cr,lI L:
disabled at the lou to high Èransition of B CLI( L. If
ENA CllI L is LOb, at the lou to high trànsition of B CLX
L, the ClrI d r ivers vi I I be enabled unt i I the subsequent
lou to high transition of B CLK L. If ENÀ CllI L is HIGH
at the Iov to high trànsition of B CLK L, the CFI
drivers uill be disabled until the subsequent lou to
high transition of B CLK L. In additron, the ChI driver
for byte 3 can only be enabled uhen }|DR is selected on
the CBUS.
t{hile SNÀPSHOT ClrI L is high, the Cl{I
SNAPSHOT Cl'tI L:
DÀTA LÀTCH is transparent and passes data directly frorr
Èhe CltI to the PA BUS I,IULTIPLEXER and Èo the DBUS if CtrI
data is selected by tte DBUS select controls. hhen
SNAPSHOT Cl,!l L is low at a lov to high trànsition of B
CLK L, the data Èhàt uas on the Ct{I at the previous high
Èo low transition of B CLK L is retained in the latch
until Èhe next lor to high transition of B CLK L occurs
with Cl'lI DATÀ I.+\TCH ENÀBLE high, àt uhich rine the latch

CHIP ID il:

becomes transParenÈ again.
ÀDD REG ENÀ L:

LOt{
Data on the PÀ EUS is cl,ocked
iNtO thE C}TI ÀDDRESS REGISTER At thc HIGh ÈO LOh
transition of B CLK L.
HIGH The Ct{I ÀDDRESS REGISTER is not changed.
216

XE SELEC? H:

J.Aa - XBe
tranrltlon of B Ctf t il IB cloctr ere cnablcd.
'
Htclt xB l
L lf XD clocla .rc cntblod.
Also urcd ln conJunctlon rith FC <01:CG) H to detenine
rhlch bytcs of crch IE are to be re.d.
fUS SEL S<l:O) H: DBUS SEL S<l:C) H control vhat data
ulll bc cneblcd onto thc DSUS eecording to thc follouing
tablc 2.
t[ trbtr 2
+-------+----------t
---+
I
I DEUS SEL Sl H I IDUS SEt S0 H I DBUS
+-------------+
---+
-o------

LorJ

Lorí

CACHE DATA

LOh;

HIGH

I CtrI DATA

I
I

I XE DEC. BUS
---------+
-----+
llhen XB DECODE BUS ls sel.cÈcd on thc D3US' XBUF 16 H is driven
onto bytc 3 of the DBUS, lnd thc othcr three bytcs.re zeroed.
lllux SEL S<l:g) H: |;UX SEL S<l:0) H dcterninc rhat data uill be
sourced onto thc iEUS Íroa thc IDR chip (if the ËBUS drlvers are
enrblcd) cccordlng Èo thc follorlng Table 3.
I HIGH
+-------

I IITGH
-+------

ll$rux sEL sl l;lrux sEL se n

LOí

I
I

HTGH

lrBus

XA DATA

LO'
I tiA BUS
I HIGH
I PÀBUS
I HIGH
I HIGH
-------+
+-----------+--+-----l{ben the }rBUS }TULTIPLEXER is steered to PÀ BUS, the most
signlf icant btt vill be . logical I (active low).
AIIUX SEL S<l:0) H deternine shat data uill be
ÀËUX SEL S(I:0) H:
BUS
fron Èhe lrDR chip (if the PÀ BUS drivers
PÀ
sourced onto Èhe
the folloring Table 4z
to
are enabled) accordlng
I

2L7

I tor

LOJ

C;I AT.D REG

HIGH

CTI DÀTA

LAJ

I II IGH
I HIGH
+------l-------

I trÀEus

lLc

+------

-+---

---+

I DEUS
I HIGH
----+--------+
-+-----If P^ BUS DRMR EIIABLE is false, the PA BUS FULTIPLEXER is steered
to iA BUS for the least significant bit or bits vhich are
continuously enabled. (See PA EUS DRMR ENABLE under IFPLICIT
I

CONTROL FUITICTIONS) .

DBUS ROT S<l:0) H: DBUS ROT S<l:0) H cause data fron the DBUS to
appear on the inputs to the iDR and llDR byte rotated as shorrn in

the follouing Table 5.

Lol{

HIGH

| 0t312lr

I HIGH
| zlrle
13
I HIGH
+-------+----------+--------+
CLI( SEL S<l:0) H deternine vhich DtsUS
CLI( SEL S<l:C) H:
destinaÈions vill be clocked on the lou to high trànsition of B CLt(
L according to the follouing Table 6.
I

I
I

LOW
LOW

LOW

I NOTHIT{G

HIGH

IIDR
+

HIGH

2I8

T{DR

ln cddltlon to thc condltlons llsted tn the chart, portions of the

iDR rugt be oneblcd for data returntng fron a READ, SECOND
REFERENCE. A REÀD, SECOND REFERENCE ls decoded ln the fiDR chip
uhcn:

EUS ROT S<l:0) H noÈ equal Èo zero

rnd CLX SEr. S<l:0) H equal zero
rnd HDR not bclng sourcqd onto the iBUS
Tficn, clockr erc cnabled for bytee of the iDR as shoun in the
follorlng Tablc 7.

I
| 3lxlrlx
I HIGI|
I LOÍ
+-------------+
-----+--+-----| 3 12 l x l r I
I to{
l Hlcll
+-------------+
-----+--+-----lll2lllxl
I lllcH
lHlcll
s
Anyt
cnebled, lnd CllI ÍnTA lt relocted on the DBUS' the tfDR ls also
eneblcd. In thtc crser thc fÍDR tiUX ts steered Èo DBUS data lnstetd
of Èbe BUS ROTAITOR outPut.
FC (01:09) H and XB SELECT H dcternlne uhÍch bytes
FC (tl:ot> ll:
rpperr
on thc XB DECODE BUS, and on the llEUS if Èhe
rtll
XB
oÍ erch
to XB DATA, accordlng to the follorlng
ls
stcered
iULTIPtEIER
iBlrE
trblc 8.

2t9

tDR Table I
+- - ------+----

- ---+
lxEDEClXeDECl
ItsYTElfByTE0l
{--+--------+
-+---------+--------+--------+--------+--------+
llrBUS ll'IBUS
| pc gs | IIBUS I iBUS
| ' XB, | pc
H I EYTE 3 | gïTE 2 IBYTE I IBYTE s I
srl H I
ot H I
I
+--- -----+--------+--------+
+---- --- -- - -+
- ----+-- --- -- --+
I

LOW I

TOW I

| xBl

fxBr

I xBe lxBl

x8l

lxBr

lxEl

lxBr

HIGH I BYTE O IBYTE 3 IEYTE 2 IBYTE T

| xBe

lx8e

I xBl

txBr

lxBo

lxB9

I xB0

lxBr

| xBo

lxBo

I xB0

lxBe

lxgt

lxBo

I xB0

lxBe

| xBl

lxBl

lxBe

lxBo

lxBl

lx8l

lxB I

lx8e

220

2.4

Irpltctt

Control Functlonr:

ZERO TiIX:

If:
XB DECODE BUS ls selected on the DBUS
and DBUS ROT S(l:e) H not equal zero
and CLK SEL S(l:0> H equal zero
then zero the iDR on the lou to high transition of B CLlt L instead
of rrltlng byte I of the x8 DEcoDE Bus into byte g of rhe iDR. tn
this caae, CIII DATA uill be enabled on the DBUS.
SOURCE l{DR OXTO iIBUS If :
XB DECODE BUS is selected on the DBUS
and IBUS ROT S<l:e) H not equal zero and CLK SEL S<l:0) H equal
zero

then source the ïíDR onto the iBUS. In thls case, Clit DATA vill
enabled on the DBUS.

CÀCHE BUS DRMR ENÀBLE: Ttte CÀCHE BUS drivers are enabled uhen
anyÈhlng ercept CACHE DÀTÀ is selected on the DBUS.

PÀ BUS DRMR EIABLE: lfte PA BUS drivers for all three bits àre
disabled vhen the PA BUS ls being sourced onto the llBUS. Otherrise,
the drlver for byte g (if CHIP lD'H ls loul or bytes 0 and f (tf
CHIP lD H ls high) ere continuously enabled. The renaining drivers
are disabled vhen:
CiI ADDRESS REGISTER ls selected on the PA BUS
(OrI ADDRESS REGISTER clock is enabled OR CÀCHE
and
tnTA ls selccted on the DBUSI
HDR iUX SELECTs Any tlnc the ltDR or any Portion of Èhe l{DR is
Gnabled and CfI DfTÀ is selected on the DBUS, Èhe fDR ËUX ls
ateered to DBUS data (unrotated). oÈherulse, the nux ls steered to
DEIJS ROTAIOR ouÈPut.

qulescently selected on
thc CBUS. Ttre loy to htgh trrnaiÈlon of B CLt( L' subsequent to Èhe
trangltlon utrlch causes the Ctlt drivers to be an.bled, utll cause
thc IDR to bc sclected on thc CBUS. Ttre IDR utll relatn selected
untll the loy to htgh transltlon of B CLI( L subsequcnt to the
trangltton uhlch causcs tha Ctl drlvers to be dtsabled.
pl DECODE BUS DRMR EllÀBLE: Ttre drlver for XB DECODE BUS byte O
ls continuously enabled. The driver for byte I is enabled ercePt

CBUS SELECT: ïtrc clll ÀDDRESS REGISTER is

rrfren:

and

xB DECoDE BUs ls selecÈed on the DBUS
DBUS ROT S<l:0) H

equal zero

221

ctr sEL sl H ---> t el

l8t<--- iEus ExA H
f?t---> rB 21 L
l6t---> nB 16 L
l5t<--- nAD 2{ H
lar---> rB t8 L
{3t<--- nux sEL sl
{2t---> rB oe L
al t <--- nux sEL s0
lot<--- nÀD 08 H

CLT SEL SO H ---> t t2

BCI^lL --->tt3

ADD REG EIÀ L ---> I C{
EXA CTI L ---> r c5
FC
tl ---> t c6
PC tl
'0 ll ---> t e7
XB SELECT H ---> t t8

xBuF 00 [ <---t t9

SXÀPSBO? CTI L ---> t lc
XBUF O8 H
I'GA
l2

aaaaaaa

39r<--- iAD 16 H

<-->tll
3E t ----GROUT{D
----r .LID. 37t<--- nAD tc H
lrcc ----r I 3 . DfrN. 36r<--- CHIP tD H
TDUS ROT SE H ---> t l{
35 t ----GROUXD

rus RoT sl H --->rl5
cn 2ln <--> I l6

aaaaaoa

cn16H <-->tl7
cf,f8 H <--> t l8
cnttI <-->t lg
rB a0n ---> | 20

rA'EB --->t2t
m16H ---> t 22
xB 2l ll --->t23

CACHE 2'

3ar<--- DBus sEL slH
33t<--- DSUS SEt scH
3?t<--> PAD 16 ll
3lt<--> PAD tt n
30t<--> PAD Ce H
29t<--- trux sEL slH
28r<--- Alrux SEL s3 ll
27t<--> CACHE 00 ll
26t<--> CACI|E 08 H
25t<--> CACAE 16 H

<--> t 2{

rDR FIGURE I
PIN COXFIGURATIOX DIAGRAi Àr|D PIX IDEXTIFICATIOI|

222

l. l?
l.!

flSSElrS hrglrtcr Gontrol (fRC,
GEIIRTL DESCRIPTTOI

iRC ls thc tASStttS rcglstcr control chip.

It prodrrces
tuo acts of cncodcd control signals. tt contàins bits
of thc control, stttus, and rllntenance registers. It
detccts thc lnltÍetlon of datr transfcrs, and produccs
the Dt functlon codes. lt produces thc control signals
for thc iASSBUS control bus.
2.

'CNIIOT,GT
SÈatc clercnts rtll sorctircs be dcscr ibed in terls of
signals eallcd 'SET aÈatc nrc', .CLR state nret , ctc.
lf nonc of thcsc slgncls ls true, thcre is no change of

st!tc.

SIGHL DSSCRIFITOTS

t.l

rTA GLT I,

iBA CLI L ts r ftt Ínput, and is thc prirary clock for
iRc.

3. l. I

lrl? L
ItIIT L ls r TTL lnp.,rc. Sorc rtrtG clcrcnts arG
lnitlrltzcd by thir slgnel, ra dcscrlbcd tn lrtcr

scctiong.

lE IAP <l:0) H, ADD 9-7 EQ L, ADD 6-5 EQ L, CtI FUt| $,
IÀTCHED ADD <l:2> H
Itrccc ctght slgnels .rG Ttt tnputs. lhcy arc docodcd to
producc thc vlrtous control outputs of tRC .E dcsertbcd
in later rcctlons. ttrcy erc dccodcd to prodr.rcc intcrnrl
slgnels as ghorn ln thc Teblc bclor.

3.2

IE iÀP (I:E)
e
e
o
g

Àpp 9-? EQ L

App 6-5 EQ L

LATCHED ADD

e
0

e
e
o

0
o
o

g
0

x
x

e
2

223

5
7

x
x
x

<a:2)H OUTPUT
SEL COXFIG II
SEL CTRL H
SEL StÀT H
SEL YAR H
SEL BCR U

sDL rÀtxt H

SEL CND/ÀDD H
SEL EXT H
SEL iAP H

TXI REG H

t.l
t.!.1

ltr rD L

tlà ÀD L 13 . ttl Input.
D Sl Yl Ot
D sllYl oE 13 .n Gdg. trlgg.rGd D fltpÍlop, cloclcd on
th. rlt&|9.d9. of l!À Ct.t L.
u) slÀvE op <--- raà ADo | . RETUnT SrAt L . EfD Stlv€
L
rftara

llD SI YE B - DO St yE or I . (SEL tCR || + SEL corttc N
+ SlÀYl OP PGI [,
+ tlc S?A?E E . (2 CICLE nD I r SEL ÊIt t|l

+ 2 CtrCl.E nD | . Crl FUI X . SEL CID/ADD e . UpBtt
cf,D/ÀDO I.
+ CP ltlsl L . ?nA Snrc L . CtI ftl ll
-,
d|.rc
2 CTCLE ND T. SEL SITT I O SEI CTRL I r SEL YÀR X.
IAP || +
SEL lÀtlf I

t.1.2

SEL

nE Allla
.n cdg. trlgg.r.d D fllptlop. cloct.d on
th. rlrlï0.d9. of ltt CLr L.
nlc ÊlA?E <---(Cf,ECr CtnL SïA ll . SET FGE CIRL L + 2
CICLT TD I ' Cf,I FUI LI ' Do SI.àYI OP II LD CEDE READ L
'
+ sRI CI TI'E L
nDG STÀl! t.

ràara
LD Cf!| t!ÀD l.

r.!.t

Cp fUSt I.

iDt ttÀ t.

elloD L.

a'Yr cc. .
Stltl Dl! I 13 . Èot- tbl. tr.nrcl.v.r.
SIIYE EII I . ErD Sl.tYl i + nSTU StA? ll

r.!.a

ltÍlr atl? I
l3nnf Slft f,1.. to!.. tbl. outpuÈ.
l3nll Strl r - E Sltv3 OD l . (llt nEG I' (lttcllED
r.al + (ll tAf <l:t> ol ' IDO 9-5 l0 Ll
<ar2)
^D
224

t.a

roll st!
lDl! sEL 13 .a cógc t3iggclcd ÍliPÍloP. cloctcd on thc
strtr|g .d9. ot ia Cl.r L.
l.t)lD iDl! . lD trtrt I
rDlb <--- llus 23 r
cl.I rDtl - lllt I
A cootrol rt.t. to bth lo.d .nd clc.r i0ll t3 lllcg.l.

€

t.t

n
.f lt .n rdg. trlgg.rcd D ÍllPÍloP. cloct.d on thc
tlal.tf .d9c oÍ tlA CLt L.
ur^D n

. LD elRL r

ii <--- tlus ! x
ClI n . lllt X
A control 3t.t. to both load and clc.r n 13 lllcg.l.

l.a

rac

llc lr .n Cdgc trlg9Cr.d D fltPfloF, cloclad on thc
tlrtng tdgc oI ilà Clt L.
IO D llc - LD CIIL B
llc <--- IBUS a x
ClI lBC - IIll F
A contiol rt.tt to both lo.d .hd clc.r IBC is lll.9.l-

t.?

r.r

rlt totrt sll t
tfP Polxt sDL I l. . totar Pol. output.
llÀP FOIII SELt. D? DIISI L + SÊL iAPX.
' crr F' x

ÏÏ

tBC lr.

CmD lr . tr.nrp.l.nt
ll r C? llrsl L.

cmD <___ c|t tl!

cloD x lr.

latch. lt li op.n tl fÀtclt EII CS

t. set FcE Ert L

totcr polc output.

225

l.t

tllcr !I? ca

t.r.l
'

lllcl lll CS ta .n adg. trigg.rld D fllpflop, cloclGd on
Èh. tl.tn9 .dt. ol tl|l CLt L.
l^l|cl lxt CB <--- Do stÀYt oP ll . SEL EIT f, t CP IDLE I
Gt lltll, ct tDGt I
C? lll8l 13 .n.dg. Èrlggcr.d D fltpflop, cloctcd on th.
slalng .dg. ol l!À CLi L. tè lr lrlnchromu.ly cle.lGd
ll tlt? I r ttÀ ctt L.
8ll CP llFI . lttcr EIt CS X r Stt FGE txr L
ctl cl luSI . (c|.n llouT ctn f + IxrT xt r .xoT. sET cp
IUAI

CP IDL! f - CP rlFf E . tRÀ SIïC L

t.t.!

ttout e,' <tra>

tOUf Cfn <3tt> lr.

fout blt 3tm hronou.. up countGr,
clocl.ó on th. rl3lng .dgc of lBÀ Cl.tr L.

t.9.t

t.9.a

ctr rou? ctR i. cp ltsr ||. ||Dp rt f, + cp Busr L r Do
S!ÀVI OP l. SIL 3rl L + lOUt Cti È0 13 lt+CPAUSII.
lnÀ SIIC L
Clll? lolrl Clt - Cll !0U? C?n L
ltr aIlC I
ttr SIt I lr . ÍlI. lnPut.
ca rts

ct llm 13 .n .dg. tslgg.l.d D fltl flop, clocl.d on th.
rlalng .dg. of rlA Clt L.
5gl CD IUrc r Cl llÉI L r ÍrOUl Cln lQ 13 ll
CLn Cl nre -l LD SlAl f . ISUS 23 í + lllï ll + DT llllT
xl . .xot. sar c! ilrlc

226

r.t.t

'LI
r .Xrt.
SEl Dti
IllT DEf X 13 a totci pol. output.
nrt DEI I . Dn H

1.t.6

ra !0 a
!",.ati.

t t. I tÍrn3p'rcnt l'tch' oPcn tf cP

'DLE

I r tBA

RS EO a <- - ÀDD 6-5 EQ X . ÍLÀICI|ÊD tDD <a:2> r - a,

|
!E|, l|t?
Dtl tr .n .d9. crlgg.r.d D fltpÍlop, ctoclad on tàc
rt.tng Gdg of tgt CLt L.
(mut ctt <!:r) -lt
sEt Drt. pttstr.
ct.n Dlr -( rrir r + (fl)ur crR <3:a> - t3t + ítarÀ r. Rs

3'9'7

rlD
tED lr rn .dgc trlggcrcd D fllpflop. cloct.d on thc
3lrlng .d9 oÍ iBà cLi L.
SEt IED. RS 30 a L r lOUl Ctt EQ 13 h r CP AUSI f,
CLt IaD ' (lItT L + LDSt?l.IaUS tt Bl . .xol. sEt
IED

1.9.t

rDt ltÀ 8 L
tDP fnÀ SIrc I lr.

tot.r polc output.
tlDP lRÀ SIf,C A - IDP tRÀ I . iBÀ CLi U
rhcrè,
IDP lnÀ H -

t.I'

(TOUT Cln <3:a> - l3l + ttllcl EXt cS f,.
slrvl oP E8 +RsEQ a Lr cPEusr H. tnÀ stNc n
UPPIR YTN ? !I L
UPPER Vtn Cxl EX L ls . TIL tnput.

227

3. lr. t

uPut3 tr?
UPnll tAP lr rn rdgc trlggrred D fttpflopr clockcd on
tho rlrtng rdge of tBA CLI L.
S3I UPDATE TAP . DT TIIT [ + UPPER VAR CXT EX H
CLn UPDI?E tAP r (IXlt H + CHDCI tAP ll) t .XOT. SEt
UPDA?I TAP

t. tr.2

UPilIT qD rcC

UPiltt Cf,D ADD lr .n rdgc trlggcrcd D fllpflop, cloctcd
on thc rtrtng cdge of nBA CLI L.
SET UPDf"t Cf,D ADD r DO CnI Cïe L . DOI]|G CrI ClC lt + DT
IXtt I

CI^R :TPDATE CnD ADD .
UPDATE CND ADI)

3.1t.3

DO Cnr grc

(txlt

H + LD CnD ADD lll

i .lfOT. SET

D Cf,l CIC H lr tn opcn collcctor trenacclvcr. IRC
drlvcr m Ctl CIC ll tou lf UPDATE CilD ADDH+UPDÀ?ENAP
H-

3. lt.l

3. ll

DIrc Crl CTC
DOIXG Crl ClC ls an edgc trlggcrcd D fllpflop,
on thc rlslng edgc of tBA CLX L.

clocked

cïc H
u)Ilfc Cllr cïc
DRIYI I}t Dlrsr
ORM DT BlrSï le an odgc trlggcred D fltpflop, clockcd

on thr rlslng edgc of tBA CLf, L.
MIYD DT BI'Sï
rxtT L r Dt 8usï L
drrrc r

I.D EXT RO B . IATICH Err CS N ' CNI FUTI H t ADD 6-5 EQ H

3.ll.l

. (IAïTCHED ADD <l:2) . Ol
Dr tu8l I
DT BUSï ll ls en oPCn collecÈor transceiver. llRC drives
Dt BUSï lt lor lf DRIYE DT BUSÏ L.

22t

3. 12

slc(fD RD ctcLs
SECOID RD CICtE ls

CLf L ls lol.

e tr.nsPtrent D l.tch, oPCn yhen iBA

H.
SECOf,D READ CTCLE
CNI FUTI L + LD CADB READ H + SE? CB trlrxc
3.12. I

FORCT rtrrs

2 CTILE RD H '
H

r ro L

U) L ls a totc. polc output.
FORCE IBUS H LO L - iBA CLr L + SECOITD RD CïCLE L.

FORCE IBUS t

3. l3

FGI

.n cdge trlggercd D fl lpflopr cloclcd on the
rlslng edgc of iBA CLtr L.
CI.R FGE I IXIT H + DT IXII II + LD STAT II . IBI,S 19 H
SET PGE H ! SE? FGE EXT H + SEI FGE TAITT IT + SET FGE
CTRI II + SET PIGE VAR H + SEI FGE BCI H + SET FGE TAP H
FGE ls

vherc,
SET FGE EXf H r IBIS 5 H . IBUS t H . DT BlrSï H . LD Eff
RCH
SET PGE llÀIXT f, - ii L . SEL iAllrT ll . D0 SIÀYE OP H tr
(lII FUN ll SET FGE CIRL ll ! (SEL CTRL n ' REG SIÀTE L tr
cËI Ftil H r Dt EUSï lt. DO StÀyE Op Bl . (IB Ct r IBUS 1

H+niL.IBUS3H)
SET PGE VaR L . CËI Flrlr B . DT BUSï B t SEL VAR B . DO
SLIYE OP H
SÊt FGE BCT L r Cil FUx tl . DT BUSI H . SEL BCT H t DO
slÀvE oP ll
SEr FGE lrÀP L - ClrI FtIl ll t DT BUSY lf . SEL tÀP ll t IBC
t . DO SI.IYE OP H

3.13.1

st^vl oP PiGB
ST.ÀVE OP FGE ls.n

cdge triggcred D flipflop,
the rtslng cdge of iBÀ CLf L.

SIÀVÊ OP FGE

229

cloched on

t. la

tlUS a I

230 l9r lE, 5: C) are nlne tri-staÈe
IBUS 3l H lr r tr t -ete te dr iver.
le
srrltr
I zcd I n thc tablc belor.
Opcrrtlon
IEU8 n H (n
Èr.nac. tvorr.
EXASLE

5
a
3
2

t.lt

DÀTA

RD 6IAT U + IIIT II
RD NAII? II + RD STAT ll

+ IIIT

RD STA! I + tXtT tl
RD STAI lt + tXI? U

IIIT

RD S?AI II ' FGE H
RD STAT II
TED N

I '
IBCH.rIttL
a
!

RD CTRL H + IIIT

rxtt tr

DT BUST H + IXIT H
CB HUXG ll . RD STAI H +
iDIB SEL H ' RD STAT L

IIIT T

trtt f,
Irlt ll

(trt)' lll DII'
Dt
"lI
Df Dlf <lrt) rnd t/l DIR erc Èhrcc cdgc trlggcrcd naster
rl.v. ÍttpÍtope. lh. lnput sttgc ls clockcd on the
rtrlng rdge of ntA cLf, L. Ilrc outputs changc vlth thc
Írlltng rdge oÍ rBA CLi L.
lorD DT ?IT trtDEÍlRSil
DT ?I'T I <--- IBUS I ll + IBUS 3 H
CTI D? FUil t r II{IT B + DRIYE IÍl BUST H . DT EUSY L
DT FUf, 0.LDtlfRtU

m Fux a

r IIIT f, + DRIY! m BUSÏ H'
t(nD III DIR I LD Eft R! ll
c[.R m ?ll,
DT DIR

CLn D? DIR .
3. lt. I

t. tt.2

txlT ll

D-^ BUSI L

Dt tD33
Dt tDLt lr . tr.ntPrrent l.tch' o1tQn vhcn FBA CLi L IS
ht9h. l}T lDtE I
Dt lrlt
Dt IIIT tt . DT IDLE H . (DT FUN (l:3) H Ol

I' tlUS Ë E
REG CTRL GA (2ZE) H AXD IBUS Rtí H rre totcr Pole
REG eInL Gt <2:t)

3. 16

Èranscelvcrs.

- DO SIAVE OP H . SET FGE BCL L SET
iAIXT L . (SEL CIRL II + SEL TAIXT H + SEL ETRL' HI +
CHECX TAP N + IXIT H
REG CTRI GA O ! r (DO S[^YC OP H t SEt FGE YAR L . SET
FGE liAIXI L . SEt pGE n^p L . (SEt VAR H + SEL iAIXT r| +
SEL rÀP l|l + UPDÀtE CID ÀDD H . UPDATE Ex H + DO SllYE
OP II ' SEL EXT B ' CP IDLE HI ' IXIT H
IB|S r H f DO SÍ VE Op U . CnI FUt L r ISEL CTRL H +
SEL StÀ? H + SEL VAR ll I SEL rÀlxt H + SEL iÀP tll + CP
BqSI l| . ?RÀ SIXC ll t CIOD L o RS EQ { L + UPDATE CnD
ADD . UPDATE EI{ H + REG SÍÀTE II T DO SIÀYE OP Ë O OTI
FlnIL.SELETE+ITITI
rhcrc,
CHECX iAP H - UPDÀIE NAP 8 . UPDATE EX II + DO SIT.íE OP H
. SEL }TAP H ' SEI FGE iIAP L.
\
\\
and
UPD TE EX ll 3 DO SlAltE OP L + SEL CnD ADD ll . clII Fttlll L
\\
lIttRIAL lr3l o? nDG qlnL Gt (2:t) n
REG CTRt GA 2 ll
PíGE

3.16. I

iRC uscs thc rccclved vcrslons of RBG CTRL GA (l:C) H
and IBUS RI H to load and rcad lnternal stàte elcrrents.

ïtte follovlng teble dcflncs thc control slgnaLs.
REG CIRL GA (2:0) H
SIGXAL
IEUS RT H
e

a
5

I
I
I

LD SIAT H
RD STAT H

3
3

LD lrÀIXT H

RD iÀINT H

LD CIRt H
RD CTRL H

LD CiD ADD H
CHECT NÀP H

g
6

23r

3.1? RDG emL tD? (2:f ) E
REG CtRL fDP (220) Ë arc toter Polc outPuts.
REc CTRL tDP 2 H . DO STAVE OP ll . ÍREG STATE ll . Cnl FUx L .
SEL ETT H + CiI FT'T{ H ' CP IDLE H ' SEL ETT H
+ (SEL StAt H + SEL iAlX?
A , . Clll FUX L +
.
SEL BCR II SET FGE BCT L + UPDATE CTD ADD L
. SEL CTD ADD HI
REG CTRL iDP I ll r tX) SIÀVE OP ll . [(REG STATE H . CiI Ftft{ L +
CNI FUX 1I . CP IDLE II) . SEL EXT H + SEL CTRL
H + SEL iAIXI II ' CËI FUX L ' iDIB SEL H
. SET FGE TÀIXT L + CllI FUT II SE? PGE VAR L
. SEt FGt iAIrT L . (SEL VAR H' + SEL tÀtlfT H)
+ SEL Cf,D ADD II ' UPDATE CTD ADD L + GI FUN
H ' SEL STAT HI +
UPDATE ET H ' UPDATE Cr|D
ADD II ' UPDATE TAP L ' LD CBDB READ L.
REG CTRL iDP C H - DO SIAVE OP ll i [(REG STATE ll . Cil Fttt{ L +
OII FUII 8 . CP IDLE HI . SEL EX? H + SEL STAT
H + SEL CTRL H . DT BUSY H . Cït FI,X II . REG
stÀTE L + Gl FUI H . (SEL CTRL H + SET PiGE
rAt1t L . SEt FGE VÀR t r ISEL nAIxT H + SEL
YÀR llt + SEL 8CR H . SET FGE BCT L) + SET FGE
iAP L ' SEL iAP HI + UPDATE EN !I ' LD CBDB
READ L ' UPDATE CtrD ADD H.
3.

SILO CI|CTE STALL L
SILO CICLE STALL L is a totea Pole outPut.

SILO CïCtE STALT H. CHECI( TTAP H + trDP TRA H. CTOD L.
CP EUST H + DO ,IAVE OP H ' CP IDLE H ' RT EXT H.

232

iRC trblc I

Pln ldootlflertlon

PIr I
I
2
l
1

6
7

I
9
le

ll
la
t5

l6
t7
l8
l9
20

22
23
21
25
26
27
28
29
30

32
33

3{
36
3?
39
40

uÉ Grtc tYPa

PII ID
IBUS I H

crtE ttPt

IEUS 3 H

GAITZF
GATITF
GAITPF
GAI"TT'

GAITZ F
GATTTII

FORCE IBT'S U LO L

S[.AI'E DOXE H

DO C;I CrC H
RETURII STÀT II

DT FT'X I

GAlrrn

IXTT L

GÀI?XF

iBA AI'D L
iAP PC'IXT SEL H

GTITXF

GAIilF

UPPER YÀR CXT EX L

GAITII|

cil Fut H
TÁTCHED ADD { H
IEiÀPIH
ÀDD 9-7 EQ L
IAïICHED ÀDD 3 H
IE IIÀP G H
TATCHED ADD 2 H
ADD 6-5 EQ L
REG CTRL iDP I H
REG CTRL iDP 2 H

GAITXF
GA

IïITf

GÀITNF

GAIilF

GÀITNF

GÀlllrtF
GAITNF

GAITI'F
GAITTIT

GAtrnr

REG CtP" iDP O H

GAI"Tt{

ËBÀ CLX L

GAITNF

SILO CYCLE S?ALL L
IBUS 5 H
IBT'S 2 H
IBUS I H

GAITTTI

TRÀ SïIrc L
C?OD H
TDP TRÀ SYNC L

GÀITI|F
GAITTN

GÀTTil

IyrDIRH

GÀIrfN

GAITZF
GÀTTZF

GÀITZF
GAITTN
GÀITZF
GAITTF
GAITTF
GÀITZF

ri IT DEII H
IBUS 18 H

REG CTRL GA 2 H
REG CTRL GA E H

IBUS 23 H
IBUS RT H
DT BUSY H
IBUS 19 H

tl5

REG CTRL GÀ I

46
47

INTER L

GÀITPF
GAITZF
GÀITZN
GÀITTF
GÀITPN

IBUS C H

GAITZF

tll

{{

GAIT"F

tBus 3l H

GAIrlï

DTFUNCH

233

IIRC FIGURE I

PIN COXFIGURATIOX

IBUS 4 H <--> r 0l

18t<--> IBUS E H
DTFUXEH

<---l02
tBus 3 H <-->t03
SIÀYE DONE H <--> I el

FORCE IBUS M LO L

DO CrrI CïC H
RETURX STAT II

a7 t --->

l6 I ---> INTER L
{5t < --> REG CTRL GA I H
ta I ---> IBUS 3I H
t3t<--> IBUS 19 H
{2t <--> Dt EUSï H
at I <--> TBUS Rt' H
tlg t <--> IBUS 23 H
39 t <--> REG CTRI, GA E H

<-->t35
<--- t 06

mFuxlll <---le?

ITIIT L ---> t e8
UPPER VÀR CNT EN L ---> I 99
lrBA ADD L --->tl0

DIAGRATi

aaoaaaa

<---tll
38 t ---- GROUT{D
TIGÀ ----t l2 .LTD.
3? t <--> REG CTRL GA 2 H
trcc ----tl3 . DOfltl. 36 I <--> IBUS IE H
35 r ---- GROI'ND
CNI FUII H --->lll
3t I ---> xlrlT DEl| tl
LÀTCIIED ADD { II --->tl5
33 I <--> IBUS I H
IE IIAP I H --->tl6
32t<--> IBUS 2 H
ADD 9-? EQ L --->tl7
3l I <--> tBus 5 H
ÍÀTCIIED ADD 3 H ---> t l8
3C t ---> SILO CTCLE STALL L
IETAPEB --->tl9
29 t ---> DT DIR H
ÍÀTCHED ADD 2 H ---> l2G
28 r <--- NBA CLK L
ADD 6-5 EQ L --->l2l
SYNC L

T.IAP FOINT SEL H

aaaaaaa

REG CTRL TDP I II <---122
REG CTRL }IDP 2 H <---t 2 3
REG CTRL NDP g H <--- t 2f

27 |
26 I
25 t

2t4

---> NDP TRÀ
---> CTOD H
<--- TRÀ STNC L

3. 18

r^ssBrrs sru, cortRol (rsc,

l.t

@ncrrl
ilSC is the iASSBUS ADAPTER SILO COI{TROL CHIP. It
contàins 2 counters for addrcssing 32 bytes of SILO RÀtt,
It
and logic for dctecting SILO elPty and SILO full.
hASSBUS
SILO
.Írd
gcncr.tion
chccking
oÍ
and
controls the
Bits <l:e) of the VAR are resident in
DAIA 8US parity.
iSC and are uscd for EYTE COIITROL. Ttre Cl DATA n^SI is
gcncratcd in iSC. . iSC generàtes the control field for
controlling the flov of data in the llDP's (Tte data
p.th chips.;

Tcrrlnology
Sone stàte elerents tre descr ibed in .terts of signal
naies SET stttenare or CLR stàtenale. If SET statenàle
is true, the elelent is set; if cLR st.tenatre is true,
the eleaent is cleared. If none are true, there is no
change of state.
À signal nane vritten as'Signal Nane IN (H or L)'is
the output of the input stàge of à D flipflop clocked on
This signai is the
the rising edge trBÀ CLK L.
equlvalent of t D laÈch, oPen vhen iBA CLK L is lou, and
contàins the statc to vhich the flipflop uill be set on
the rising cdge of the clocl.

IXTERXAL REGIS?ERS - IDTIS N tr

iSC contains thc follouing bits of llBA INTERNÀL
REGISTERS. Ttt-:: are loaded fror and read to the IBUS.
REGISTER

BIT

IBUS 8IT

VAR

VAR (l:0)

(l : G)

}IDPE

STATUS
STÀTUS
STÀTUS

iIAINT.
ltÀlNT.

SPE

DLT

INV DFG
TNV SPG

l{
ll

IBUS n H ls a tri-state
in later sections.

port.

DETÀILED CBIP DESCRII'IIOX

a.l

SILO COI{TROL

Bits ate described fully

Ttere are tb counters used for loading and reading Èhe
sILO RAtr SITCTR (SrLO- I{ASSBUS COUNTERl and SCCTR
(1 ILO-C[{I COUNTER) .
Ttro fl ipflcps are used to help
de.'ect SILO full and SILO enpty. These àre 2 BYTE EN
and JDSC ('Just done Si lo ClrI XFER') . JDSIr (Just done
Silo llassbus XFER') EQUALS .NOT. JDSC.

l.l.l

1.1.2

sc ctn (l:!)
SC CTR is a five bit synchronous counÈer. It
state rlth the rlsing edge of iBA CLK L.
SC CTR ls lncreaented lf SC XFER H
SC CTR is cleared if DT INIT H + INIT H

changes

sfr cTR (l:l)

Slf CTR is a four blt =ynchrounous counter.
state wlth the rlslng edge of lrBÀ CLK L.

IÈ clranges

Sfl CTR ls increaented if Sti XFER H.
Stt CTR is cleared lf DT INIT H + lNlT H

1.1.3

CTRS (l:l)

BQ H

CTRS <{:l> EQ IN H a ÍSC CTR <4:l> IN H - S}r CTR <4:l)

IN Hl.

CTRS ({:l> EQ H ls the ouÈPut of
2ND iBÀ CLK L is high.

a D latch,

OPen vhen

CTRS (tl:l> EQ H <- CTRS (tl:l> EQ IN H.

a.l. I

2 ETTE EX
2 BffE EN is an edge flip flop clocked on the rising
edge of llBA CLK L.
SET 2 ETTE EN 3 (SC XFER H + INIT FOR RD H) ' .NOT. CLR
2 BïTE EN.
CI.R 2 BTTE EN - INIT fOT T{,/T{CT( H + RESET 2 BYTE EN H.

l.l.l.l

RESET 2 TrIE EI
RESET 2 BtifE EN ls

hlgh.

a D latch, oPen vhen 2ND l'lBÀ CLI( L is
EQH.

RESET 2 ETTE EN

INH

Si+SC L r(DO CïlI CYC tN H + (SC CTR 0lN L I SC XFER IN
INH L} )

rhere
ITIH SII+SC H' DT IDLE H + DT FUN O H T OLD SCLK IN H
SC XFER IIr INH H - DO CtlI CYC IN H + (DO FILL IN L t
DO[{E IX H)

236

1.t.5

JT}S'C - JDST

JDSC is

an edge triggered flipÍlop

edge of ilEA CLK L.

clocked on the rising

JDSË = .NOT. JDSC
SE? JDSC = ISC XFER H + INIT FOR RD H1 r
CLR JDSC . St{ XFER H + INIï FOR ti,/nCX H
a. 1.6

.NoT. CLR JDSC

SC XFER
SC XFER is a D latch, open vhen 2ND ËBÀ CLK L is high.

sc xt'ER
(CTRS 5:I IN EQ L + JDSII IN H + SC CTR O IN H).
a. 1.7

Sf, XFER
Slr XFER is a D IITCH' oPen uhen 2ND l{BA CLX L is high.

St{ XFER

BI|'"IE EN IN H . (CTRS 5: I

l. 1.8

4.2

IN EQ L + JDSI' IN L).
SILO ADDRESS (tl:l) H, SILO CHIP SEL (l:0> L
SILO ADDRESS <tl: l) H and SILO CHIP SEL (l:C> àre toten
pole OUTPUTS.
SILO ADDRESS <tl: l) H is the output of a aultiplerer.

if Slr XFER H' SILO ADD <l:I) H
if SC XFER H, SILO ÀDD <{:l) H
SILO ADD <tl:I) H
Else,
SILO CHIP SEL 0 L is assert.ed lor if :
sri XFER H + (sc XFER H . VAR e L)
SILO CHIP SEL 0 L'is asserted lou if:
Stl XFER H + (SC XF|R H r VAR 0 H)
DT FUN (l:0) H DT IDLE
DT FUN <l:0) H are used Èo define the data transfer
function. l'hey are encoded as follovs:
e0

IDLE

Read

fron drtve (DT REÀD)

t{r i Èe to drive (DT IÍRITE)
t{r i te check (DT WCX)

These inputs nust not change ercept uhen llBÀ CLK L is

lou.

m IDLE is a transperent làtch, open uhen HB^ CLK L is
high. It latches the value Dt FUN I L * DT FUN O L.
237

m IDLE ls anded uith Dt FtN (l:0> as shor'n in table 3
to generate inltialize stgnals.
iSC TÀBtE T

Ptn tdcntlflcrÈlon and Gatc tlyPC
PII
I
2
3

{

6
7

I
9
le

II
l{

t6
t7

l8
l9
2e
2l
22
23

25
26
27
28
29
3g

3l
l2

36
37
39

lo
tl
l2

t5
t6

l7
t8

Ptlt tD

GÀTE TTPB

cnr 30 H

GAITTN
GAITTN
GÀITTN
GÀITTN

IBUS 6 H

GÀITZF
GÀITNF
GÀITCF
GÀITNF
GÀITTN
GAITTN
GAITTF
GÀITNF
GAITNF
GAITNF
GÀITZF

cl|r 3l H
cnl 28 H
cnl 29 H
tBus ll H
REG CTRL GA E H

m cnt crc H
scLx sïNc L

SILO CTRL ÍTDP IH
SILO CTRL TIDP gH
STÀRT STOP TTB L
REG CTRL GÀ 2 H

IBUS M H
DT DIR H
IBUS O H
2ND }TBÀ CLK L
IBUS I H
SILO CTRL I'IDP 2H
SILO CHIP SEL IL
IIBA CLK DLT H
DT Ft'N O H
EXC SïNC L
REG CTRL GÀ I H
TÀST TRÀNS H

SILO ADDRESS 3 H
SILO CHIP SEL O L
trBA CLK L
SILO ADDRESS 4H
SILO ADDRESS 2H
SILO ADDRESS IH

DTFUilIH

LOAD SILO H
SILO PAR O H

SILO PAR I H
PAR L

IBUS 22 H

GATED SCLK H
TBUS 3I H

niL
TB DPA H
r8us I { ll

ÀBORT L
C}II BYTE CNTR EQ I L

GÀI'ZF

GAITNF

GAITZF
GA ITTI|
GAITTN
GAITNF
GAITNF
GAITNF
GAITNF
GAITNF
GAITTN
GÀ ITTI|

GAITNF
GA ITTN
GAITTN
GAITTN
GAITNF
GAITTN
GAITZT'
GÀITZF
GAITNF
GAITZF
GAITNF
GA ITZF

GAITNF
GA ITZF
GAITZF

GAITCN
GA ITNF

238

Table 2.
o

a
Ít

DrFUNOH

x
x

INIT fOR RD H
INIT FOR I,/hCt( H
DTINITH
INIT FOR HRITE H

C
A
g
E

DT IDLE H
DT ft,N I

I.3

I
I

DA DIR B

DT DIR H defines d.ta

l.c

t
I

transfer direction

DTFïDH.DTDIRH
DTREVH=DTDIRL
DT DIR af fects the VAR, ltÀSK, and associated logic.
1.
REG CTRL GA N E - IDUS Rï H
REG CTRL GÀ (2:9) H and IBUS RW H are used together to
read and uriÈe registers contained in ttSC. Codes are
erplicitly described in follouing secÈions. Sone codes
are unused by the chip, but affect other iBÀ chiPs.
Ttre internal signal, INIT H is def ined by these conÈrol
s ignal s .

INIT H - (REG CTRL GA - 7, t IBUS Rt{ H

1.5

vAR

tuo bit loadable upldorn synchronous
Àll transitions in state occur
vlth Èhe rtsing edge of ËBÀ CLK L. VÀR (l:0) is loaded
fron IBUS (l:0).
LOÀD VAR - (REG CTRL GA = 2l r IBUS Rtí L
COUNT UP VAR - SC Xf ER H ' DT Ftf D H
COUNT DOÍ{N VÀR = SC XFER H r DT REV H
SC XFER H . LOÀD VÀR is an illegal condiÈion.
VÀR <l:0) is read Èo IBUS <l:0) H uhen
(REG CTRL GÀ = 2't ' IBUS RIf H

t,tSC contains a

counter naned VÀR <l:0).

239

a.6

ntr Do ctt ctc
IiIT m Cif CIC ts an Gdge triggered D flop clocked on
thG rl3lag cdgc of iBà CLt( L.
sET,OítT Do CiI CTC . ITITT FOR H/T{CX H + SPE I L i SC
+ Dt R8V H. (DT
IFER lt ÍDT l9D N r (Dt Flrt <lst> t.3t
.
r
Rl[l:e X-rtl
.xol. (Dt Flrx I H SCDOIIE tr{ l|, +Dt
REÀD H r SC DO-E IX A . SC DOiE L.
CLR [ttT UO CtI CIC - (tXtT FOR RD H + CLR iASl( H) r
.llor. sET nrt m crt ctc.

l'6'l

Do cf,r clc

m c|rl CIC lt ls an opcn colt.ctor bl-dÍrectlonr!, stgnal.
tt la pullad lor by isc lt ritT Do cnt crc L.

a.6.2

Dorrc crt clc

Dlttc Ct'lt CIC is rn d9a trtggrrrd D f I ipflop clocked on
rhG ri8lng
o! tiBÀ cLx L.
"dgc
mtrc Glir ctE <- Do cÍit clc a.

t.6.3

CLt rr8r I
cr"R t|Àsi r| .

a.?

a.!

a.9

Dt IDLE B + DO C}lI CrC L ' DOI]IG Crll CIC ll.
I
iÀEt <3tt>
||ÀSi <3!r> rrc four trrnsp.rcnt l.Èchcs, uhlch are open
uhcn ÍrBÀ CLf L ts lor.
ÍíÀsi n la lrtch.d sGt if sc XFER $ r <Y^R <lrl> - nl
tt ls llrchGd clr.r tf CLn ËASl ll + tllll FOR RD H
othGrrl3c, lt ls lrtch"d ulth lt's Plevious vàlue.
CII 116l <31:20> E
CÍít tlÀSx <3:O> tl !r" four ÈotclPolG outPuts.
Cf,I tÀSÍ n n.]|ÀSin f + Dl FUX e L.
SCI.i Slrc L - lllcBlD ScLl 6rac
tÀTcf,ED scli sïic l. rn .dgc trlggcrcd fllPfloP clocked
S$lC <on thc rlslng "dgc of laa CLÍ L. |ltcll lÍscll(
(DT ll{It H
SCLK SïXC ll. tt 13 rsynchronourly clètrêd
+ txlli l|, r i8À CLtr ll.

240

a.lt

slDg nElDr
SIIDB READY ls

tn edgê tllggered fliPÍloP clocked on the

Íising êdge of }lsA cL|( L.

SET SÍIID6 READY. SI4 XFER H T.XOT. (CLR STDB REÀDY}
cLR snDA REÀDY - LÀTC8ED SCLI( SYIC

cl.t( ll.
tt is asynchronously set iÍ tlllï FOR RD fl r
'|DA
tt ls .synchronosoly cle.]Qd if rr|tt FOR rf/t{Cf, n r rBA
cll( ll'

''ll

DL?

DLt i5.n edge t!Íggered ÍlipttoP clock€d on the lising
cdgc of l|EÀ clx L.

;iï*roï

l.t2

a.t3

. sclx s$rc n r siDs READI L ' LATCHED LÀsr

.!lOT. (DT llllt ll + lNlT H,
'
cLR DLT ' COT llllt ll . IIIT l|] + ILD ST TUS tt
r tBUs ll Í t .Nol. sET DLrl
DLT ls rc.d ro laus ll !l if (REG CTRL G.3l ' IEUS Rfl I
llllcllD llst ?ttrs - lÀsr lRÀrs ll
LÀ?CllED LAST tRÀNt ls .n Gdgê trlggered fllPfloP clockèd
on thê rislng Gdg" oÍ tiaA cir L'
SET LAÍlCllED LÀST TRANS . LÀsf TRAIS H
CIR IÀTC||ED IlSt TRANS . DT Inl? fl + ll|tT Í

sc DorE
SC mxE ls .n êdge triggeÍcd fliPfloP clocked on the

rlsing edgc of }l8À CLn L.
SET SC DONE . (SC XFER I r C I BYrE CIT E0 -l ll + EXC
sYNc H
r C?RS <5:l> E0 ll . JDSC ll + SPE ll)
r 'l|oT' cLR sc DollÊ
CLR SC DONE ' DT IDLE B

2{l

l. ta

M ?ILt
DO PILL tg tn cdgc trlggcrcd Ílipflop clockcd on the
rlrlng cdgc of hBA CLf, L.
CLR DO FlLt . SC XFER H . SC mXE H . SC CtR 0 H
It ls asynchrorrcusly a"t tf lxlT FOR l/rrcX H . iBÀ CLK
H.

It ls aslmchronoutly clearcd lf INIT FOR READ ll . llBA

CLT H.
a. l5

8tÀR? SIOP t!

START SIOP iB L t s Èhc lnverted
asynchronourly sct and reaet latch.

outPut of

SET START SlIOP ËB ' 2xD llBÀ CLf H . nBA CLr DLï H . CTRS
(5:l) EQ H . JDSC H . SC CTR C L . DT IDLE L + SC mNEl
t DT FT'N T NI + DT REÀD H ' T..AST TRANS H.
CLR START SttOP rB a DT FUX I H . tlST TRÀNS H + SC DOXE
H T DO Ct|I CTC L . Df READ II + DT IDLE H.

tf a SET end CLR condltlon occur siaul taneousJ.y, STÀRT
rÍll bc hlgh.
STOP ilB L

a. 16

PARI?I

a. 16. I

l.|SC contalns loglc

l.16.2

PÀR B

for control of iÀSSBUS DÀtA BUS and

tSC contalns the blts of the lalntenance
reglstcr Èhat control lnvertlng TASSBUS DÀtA BUS and
SILO partty and for storlng parity error lnforaation.

SILO PARItI.

PAR H ls thc one algnal dcftntng thc odd PARITÏ of Èhe
data bctng bandlcd by ÈhG tDP chlps. lrSC usca PÀR H for
stortnq end chccttng PerltY.

a.16.3

IIY SPIGT ITY DFG
IXY SFG rnd IXY DPG erc trtnaPtrcnt laÈches. ttey are
tttTnchronouslt/ cloarcd tt IXII H. Ttrey ate oPen tf ttBÀ
Ct.tt ! . ltBÀ CLf DLï H . (REG CTRL GA . l) | IBUS RH L
II{Y SFG
IXY DPG <- IBUS 3I H
IXY SFG ls rctd to IBUS 22 H and
IXY IIFG lr rGtd to IBUS 3f H lf
(REG CTRL GÀ I al t IEUS RI ll

2r2

l. 16. I

gC PAR

SC PAR is an edge tr iggered f I ipf lop cloeired on the
rising edge of tBA CLf L. lf sC xtER H' it is lo.ded

rithPARHO

SPCL.

Else, SC PAR is unchanged.
a.16.5

Sf, PAR

Stt PAR ls .n edgc triggcred flipflop
rising edge cf iBA CLI L,
rÍ . Dt Ftttr I H . si XFER H,
Èhen Si PÀR
IÍ . DT READ U . IAT'CHED SCLÍ STÏC H
thcn ST PAR <- DPA H
else Si PAR unchanged.
a. 16.6

clocled on the
i

DPÀ

DPÀ is àn cdge triggered fl ipflop
Íalling edge of GATED SCLtr ll.

clocked uith

Èhe

If DT FIIN O H, DPA <- NB DPÀ H
rF DT TRITE H, DPÀ <- SII PAR H O INV DPG H
else DPA unchangcd.
a. 16. 7

TB DPA E

liB DPÀ H is a ÈrtsÈaÈe signal. It is enabled if lrl| H +
DT FUN O H. trhen enabled, llB DPA H <- DPÀ H.
a.16.8

stLo PARTTI (l:t) E , LOAD SrU) E
They are
SILO PARITï (l:0) H are tristate signals.
enabled by the slgnal that drives the Èoter Pole outPut,
LOAD SILO H.

LOAD SILO H - DT REÀD H'

Sl,l

XFER H + DT Ft|l| I H . SC XFER H.

tlhen enabl ed
SILO PÀR O H

PÀR II

SILO PAR I H

sil PÀR L + DT FUN I H r 1PÀR H r SPG

L+PARL.SCCTROLTINV

SPG H)

243

a.la.t

Dr3
iDP? lr en edge trtggcred fltpflop eloclod on thc rlslng
edgr of tBA Cltr L.

Ctn tDPl . Í(nEG CfRt GA r 3l . lBlrs p1 t . 1EUS 6 tl +

\
Ul ' .XlT. SE? IDPD
StT iDPG . (PAn Ë O DPA Ët . t.ATCllED SCLI SIIC H ' Dt
?tt0B
rDPt lr rc.d to IBIrS 6ll tÍ (REG C?RL GÀ ' 3) . IBUS Rt
l
a.16.lt 8tt
SP? lr rn cdgo trlggcrcd fltpflop clockcd on thc rlslng
odgr of tBA CLI L.
CIX SPE ' Í(nDG C?Rt GÀ ' 3t ' IBUS ]fl L ' IB1S la ll +
IIIT I + D|l lxIT Hl . .lloT. SET SPE
SEt SPE . (PAR L O SILO PAR I H O SC PAR Hl' SC xFEt( H
. SC CTR' II' DÍ NEAD TI + (PAR L O SILO PAR I H O STLO
PAR E H, . SII IFER [ . (DT TRITE H + Dt TCT H)
SPE lr rt.d to IBUS ll lf (REG C?RL GÀ - 3l ' IBUS Rl, H
6ll! eltt tD? <2rt> t
a.t?
SlUt CTnt IDP <2:0) H are 3 Èotcr Pole outputs.
stlo GTRL rDp 2 Ë . SC XFER t| . (DT READ H + DT FUN t ll
. SC DoID E L
'. U . DT FUX U . IJIIlCHED SCLK SYNC H +
0
I
sllo cTRt tDP
.
(Dt
+
FUtl I ll' SC DOIIE Ll t vAR I
DT
f
R3AD
A
SC I?DR
.
ll+Dt?l,Ilq.slrlERl.
StU) CTRL tDP, . 9C X?ER ll . (Dt REÀD H + DT FUN t H' SC DONE
+
L" YAR t X + DT READ H ' (IÀTCHED SCLK SYNCH
si rtER llt + DT rutr I H ' sc xFER H ' sc mNE H
. íDO FILL lr + SC CTR A L)
TII?B+

Dt lllt

2aa

a.lt

AIORI t
AEORT L ts tn oPan colloctor

if iDPD tl + SPE ll + DLT ll.

signal.

lt is asserted ior

rsc trSt.E 3 r/o Plrs
SIGXAL TAiE

n ' l:t
Df Fll n ll
ÍlT DIR ll
l|8A CII L
1rtl.2z.llrllr
IEUSn[
6rlrt
SILO ADDRESS n ll n . 5: I
SIL()ClllPSELnLn.l:C
U}AD SILO H
SIII)PARnU n.t:t
PÀR U
ABORT L

DIRECTIOX TTPE

I
I

I
I
5

llOTEI FOLE
troTEt ProLE

NL
rB DPA H
scl.r sït|c L
iB BItE CXT EQ -l

I
I

REGCTRLGAnH n!2:0

o
o
o

TOIEN FOLE
TRISTÀTE

o.c.

I
I

T.àTCIIED EXC L
START SÍOP ËB L

IRISTATE

r/o

SILO CICLE STALL L

GATED SCLI( H

IBUS FII TI

r/o

TRISTATE

I
I

IOTET PIOLE

TOTEN FOLE

I
I
I

I
I
,

SILOCTRLiDPnH nr2zO
DO OrI CïC H
n.31:28
CiInH
cljll OBUE CTD EN L

I
I

TOTAL

{tl

r/o
o
t

215

o.c.

TNISTÀTE

rsc FIGURE I
PTI COTFIGINATIOI DTAGRÀi

crt 3, x <---ttl
l8t<--- crt BYrE cxTR EQ I L
ctrr 3r u <---rr2
a?t---> A80RT L
cnl 2t u <---tt3
l6t<--> l8us ll H
Cfl 29 tr <---tta
l5l(--> tE DPA H
tDtS ll f, <-->tfs
tlt<--- m t
a3 t <--> IBus 3r H
Itt s 6 n <--> t 16
t2t<--- GATED SCLr H
nEc c?RL Gr | [ --->rr7
alt<--> lBus 22 n
D Cf,l CïC U <-->trt
sctr strc L ---> t 19
It r <--- PAR L
sllo gtRL tDP t E <---ltt ....... 391<--> Stlo PAR I H
. 38t---- GRourD
stt! crRL tDP t a <---ttl .
YGÀ ----t 12 . LID . 37t<--> SILO PAR t ll
ucc ----tl3 . urr. 36t---> LoÀD stLo ll
. 35t---- GROlrrD
tttRt StoP rE L <-->tla .
RtG CtnL GÀ 2 A --->t 15 . .. o... 3at<--- m Dlf I n
3tl---> slÍ.o ADDRESS I H
llus r f, --->tl6
321---> stl! ADmESS 2 B
Dl DIR r ---)tl7
3lt---> slu) ADDnEss I ll
tlus , r <--)tlt
3rt<--- tlA ctr L
zrD nlA Clr L.---)ll9
29t---> Stlo CBIP SEI t L
tlus t r <-->t2,
2!r---> SILO ADmESS 3 H
sttp ctlL rD? 2 x <---t2l
27r<--- l.ASt rRArS H
Stl.o cf,l? 83L t t <---r22
26t<--- RDG CTRL GA I H
13 ctl DLI X --->r23
25t<--- txc slÏc L
Dt ?lr t x --->l2a

2tt6

3. 19

rtcno sEQureEn (rsot E62l

GE3NAL D3SCIIPIIOI:

ïtrts sPcclfÍcatlon deflncs the dctell reguircrcnts Íor
the VAI-I l/73O olcro-sequencer.

rso tAEtE I
Pln ldrntlflcrtton rrÉ Gttc ÍYPc
Plx I Pl}| lD

2
3
I
5
6
7
T
9
l0
II

15
16

t7
l8

t9
2'
2l
22
23

COTTENTS TïPE

LDOSRL
AUT COX?ROL CODE H

BUt2U

BUtrll
Btt I ll
LII'H
FNA TAIt L
USTT ADDR 3 ll
ustr ÀDDR I ll
USil ADDR 2 H
ustr ADn , ll
IRD CIR I
IRD CTR 2

ustr D3t ll
ustr Drl tr
xErr tt H

CS ADDR aa

cs ADn !l
us?r D32 ll
IETT t2 H

H
H

i ig:iil

PIX I

GÀTE

PTX ID

CGTET?S IïPE

GÀltCN
GAlttlf 25 CS ADDR 02 L l,.,.l2tlÀ
-ll
G llltF
UVECT
GÀIflË 26 EXAETE
GAITCN
ADm
t
lr.r'l2llA
t3
G ITIF 27 CS
VU
GÀITIIF
H
TEIT
GATTIF 2t
GAITT{F
GAITIF 29 USTT DI'
'3 B
GAlllllD'
ll
GAltxF 3t usrr Dt3
GÀltCN
GAT?TI{ 3I CS ADDR A' L f ..'
,r' -l2tlÀ GAlrilF
GAlrtï 32 XDXI tl H

GAI?tx 33 XErr t5 n
GÀITril 3I CS ADDR
L I^,.l2lA
vr'
GAT?N 36 JSR I
'5
GÀIil? 37
GAIIX? 39
GÀIIIIF I'
GAITI?
GÀITIF 'I
a3
GAI11CX '2
GATTCT
GÀltxP 'It5

cAlnrF a6

USil OUT EXABLE L
EXABTE IRD RG II

TICRO ADDR IXH L

ZERO HI TTrl L
DISAELE OSR BUT L

USIX Dt5 ll
T CLT L

rsEQ rxlr L
m sRuc L

a7 BCLrt
I8

247

DISAELE HI }IEXT H

GÀITXF
GAII]CN

GÀI"NF
GÀITTN
GAITTN
GÀINtIF
GÀITTN
GAITr|F

GAITilF

GÀItIIF

GÀITNF
GAITXF
GÀITNF
GAITTN

Èrtcrrcr

2.1

!tr3r llra3rt
[? (lrtD r

2. l.l

2.2

Ittr 3ogl.t.r lr.
a btt corrrt.r butlt Íror D typc
Íltpllopr.
fC lr eloctcd ulth th. rlslng cdgc ot t CLi
L. tbr r.glat.r lr dtrect cle.red yhen Intcrntl iSEO
lllt L lr ara.rtad (rer 3.3.2.51.
lÍ JBI I, lffttl l|Ylel l, or D SRuc L lr mrerted thcn
l5? <lrt) r lfSl <trt> + I
la tbr cotÉltlonr óotcrlbrl ln thc pÍcylour p.r.gr.ph
.ro ÍpC truo .rÉ lUt G0ftnOt OODI I I r ..8ortd , lnd
(tltl<zrt)r2clot
(llrt<2rt) r I rtÉ IRD etR<2:l) í tl I thrn
t!8P <lrt) . IISP <3rt) t
?h DrcrlpCloorr
Certrln tnput pln. .r. doÍlnrd rt hrvlng 'Shr t tehcs'.
Itroe .Í. Írod through l.tch.s th.t .r. oP.n ubcn tho
ctocl lr not rrtrrtrd rnd clored ulren Èhc clocl lr
a3tafÈad.

2.2. I

e8 ln

<tirlt) Lt

tftrre ar. thc eddrerl llnor urcd to teccEs tha
Control Storc RG3. tttey crn bc Aoncretcd Ínsldc
thc chlp or erterntlly.

l.
I3It (f5rtt) lr
llror rlgnrl llnes .rc ugcd to forl CS ADDR<Os:et)
Seo trbb

2.2.2

2.2.t

UStf D<ftttt> lr

llrrrc rlgnal I lne c ere uscd to forr CS ADDR<OS:e0)
L.

2tt

2.2.11

C]I L:
llrlr ls the clocl .aioci.tGd rith thc ricrosoquc:rca3. llrc r irtng odgc of i CLf is uscd to
clocl thc llSPr tnd to 3PcciÍy:

LDOSRL
I'SII (x,t EIAALE L

DISTBLE TT IETï H
ZERO HT IET.I L

2.2.t

I GII L:
Ittr lr thc brglc 5yrÈar clocl. llrc felling cdge of
B CLf lr usod ln rpcciÍytng:
LD OSR L

USTT OUt EITELE L
DTSAALE BT XETT H
ZERO trI XETT L

2.2.6

2.2.?

rS30 tIIt

slgntl utrlch is used
lfrlr is .n lnitlrlizrtlon
throughout thc rlchlnc.
Írc Intcrnrl iSEQ IXIT rlgnrl ls totrcd using . D
typc Íflp tlop rhlch lr eloclcd rlth thc rtstng cdgc
of t CLI L. llrc lnput drtr to thc f I tp tlop t8 iSEQ
Ixtt L. lfrc tl ipf lop lr ret tt rsE0 IxIT L ls
cuortod. lntcrncl iSEQ lxlt lc .sscrtd rlrcnevcr
iSEO lxtt L lr rucrtcd or thc f l f p f lop ls set.
Íhc lntcrnel rlgnrl lc ured to dlrect clear thc tSP
rnd to forco CS ADn <tS:tt> : j
ciltnol GODB l:
ttls slgnel ls uscd ln foning:
CS ÀDDR<!S:!f> L'
USTT ADDR(3:T),
LD OSR L
USIT OUT ETABLE L
DISABTE ËI XDIT II
EXABLE IRD RG II

and tn controlltng lrSP<3:0)

lÈ ir rccetved throrryh . clcr latch clockcd ylth i
Ctf L end lt lr the l.tehad vcrslon thrt ls eetually
ueed throughout thlr sp.clÍlcrtlon.

2r9

2.2.J

2.2.)

2.2.\a

2.2. tl

An <2tOD lr
lbor rtfn l. .3. u3.d ln Íorrlng:
C3 An(ltrff)
Lc
tltr AD(!r!)r
lJmt
uEtt ot,l lrrltl I
Dt8lll,E tt nrt i
trAllt tRD rc i
end
ln
cootrolllng
US?<!IO>
Íroy ar. recelvrd throrryh ller lt-tchor cloclrd rlth
I CII L rrÉ t t lr thr l.tched rorrlonr th.t .rG
teturtly u3od throtryhout thlr rpoelÍlcttloo.
tlGD ln ltl Lr
5rn thlr rlgnrl lr trrerted cs ADm <t5rGf> r a.
It lr rlro uted to crettrr
tEno rt rtt? t.
rrsil orrt Srlll^E t
DttAlLt xt rErt I
ItrtLS ttD rc I
lC lr recrlvod through . rler lttch cloclcd rlth t
Ctf L rrÉ lt lr tho l.Èch.d e.rrlon tb.t lr tcturlly
u3od throqhout thlr rp.clÍlcrtlon.
trl|ttr Ut.tGl lr
ttlr rlgntt lr ured to torr CS ADDR <fS:rt> L.
lÍ EIllLt UIUICI f, or D SRvc L lr tre rted:
lttP <3rf> r u6P (3rf) + I
USIÍ Am <3rf> r llSP <3rf) + t
lJ OgR L lr mt .r3.rtod
t3n0 It ISft I lr emrtod
Dlstltl It ItIt I l. .trerÈrd
SffOLB IRD RG f, lr not .rtcrtrd
US?f OUf EIATLE L lr noÈ .tt.rt.d
It lr recrlvrd Èhrough t rlru lrtch cloclcd vlth I
CLt L rnd lt lr thc lrtchcd vcrrlon thtt'ls ectually
utcd throughout thlr rpcctÍtcrtlon.
D ElïC Lt
Sec 2.2.La.

25r

2.2.12

trD elr (2:lD lr

2.2. lt

ttlr rlgml lr aed to Íorr
<f5gl> L,
CS tn
rÉrr ot lrr|tt L
Dlsf,ll rl :rt r
rrrt.C tlD n r
USff fn <t:f> I
LDqL
rrÉ 3o cqrtrol llS? <!:?>
tlrcy rre f.c.lrcd thror4h 3leu lrtcbct cloetcd rlth
I Ctf L rrÉ lt ir the lttcbed ucrtlont th.t .3c
rctrrlly ccd tbroqhout tbtr rpceltlertton.
CII fn (!r!) lr
?lrere rlgorlr are u..d to ródrcrr tbe tlcro-rttct
lt JSn I, E|lll.f,
cblpr durlng lt.ct o;lrrtloan.
||UBCI I' or D SfUe L lr .lr.rted thcn
USff Am <t:l> r llS? <3:t) + I
lF thc eondltlonr dcrerlbcd ln tha Pravlous
prrrgrtpà.rc not trr!' liff GOrtnOL GODE I ls
.r..3td lÉ (llft<2: t> . 2. J or (llft<2: t> - I tnd
tnD Ctt<2:l) í alD thea
UStf AU <!:f> r US? <3:O> -l
('3herrlro

lrstl AU <!:3) - USP (3:t).

2.2. la

us.lr oOt rfll

thlr lr thc rlgnrl *rlch controlr thc tr l-rtrtc
rnrblo oÍ th. output of the .icro-tt.ct ehl;r.
Erc tbr rlrlng cdgc of t CtI L untll the trlltng
rdgr of the ncrt I CtI L, Èhe rlgnrl lr lnhlbtted.
After thr felltng cdgr oÍ D CII L lt ls .rtartd tt
lUt GOxtll0t CODC I lr .rrcrtd end (!lft<2:f > . 2,3
or (Etlt<2:f> . I rnd tRD eln<2:l) |all. lf
EItlLE u'YECI n.

u) sRrc t
lntcrnrl iSEQ IXtt L
or ITCRO ÀDDR IXN L
.rC .sscrtcd thcn I|STR OUt EXÀELE L is rr.hlbird.

JSR X

251

2.2. 15

JSR f,:

ttrlg slgnal ls uscd to fon
USTT OUT EIABLE L

UStr ADDR<3:t) ll
and to control lrSP<3:O)

It ls rccclvcd through r skcr latch clocked ulth tl
CLf L and lt ls Èhc latchcd vcrslon th.t ls actually
uccd throughout thle 8peclflcatlon.
2.2.16

ttno f,I rtr? L:
nrls slgnal ls used to clcrr thc CS ADDR<I3:C6>
Itnrr citcrnal to nSQ. Fror the rlslng cdgc of Ë
Cl.l L untll thc falltng cdge of the ncrt B CLi L,
thc rlgnal le lnhlblÈed. Aftcr thc falllng cdge o[
B CLf t tt lg essertcd vlrcn eny of the folloulng
elgnrls arc asaertcd
InÈcrnal llstQ INIT L

EXAALE UYECT H
DO SRUC L

;ltCRO ADDR INH L I s
lnh ibltcd.

If
2.2.17

asserted, thÍ s signal is

DISIDLI BI IBTT I:

ttrls slgnal ls used to conÈrol thc }|Eft<l 3: C6>
ConÈrol Store latches. Frol thc r lslng cdgc of l'l
Ct.tr L untll thc falltng edge of thc ncrt B CtK Lr
thc stgnal ls asscrted. AfÈcr thc falllng cdge of B
CI.tr L- tt ls asserted by lny of Èhc folloulng

condltlons:

iICRO ADDR IlfH L ls ascerted
Internal IISEQ IXIT L is asscrted
EXABLE tttíECT tl ls asscrted
DO SRIIC L ts asscrtcd
BUT CONTROL CODE H ls asscrted,

(Btn<239> . 2'3 or (BUT<2ze) a I and IRD CTR<2:I)
I gll and JSR Ë ls not tsscrtcd.
BUT COXTROL CODE H le assertcd and
(Blft<2:C> a I or (BUT<2:0> 3 I and IRD CTR<2:l> 3

,t,

othcrrlse lt ls lnhtbitêd.

252

2.2. l8

BIÀILE IRD ROT Ë:

Ttrts slgnal ls asserted rhen BUT CONTROL CODE H is
asserted and (8UT<Zzg) - { or (BUT<2ze) = I and IRD
CTR<2:l) . e)). lf any of the followlng signals ls
asserted Èhen ENABLE IRD ROlt H is lnhlblted:
IIICRO ÀDDR INH L
fnternal IISEQ INIT L
ENÀBLE UVECT II
DO SRlrc L

2.2.lg

DISÀALE OSR BUf II:

This slgnal cones fron the IRD ROts and vhen
asserted tnhlblts LD OSR L.
2.2.24

LD OSR L:

ttte staÈe of LD OSR L ls Ínttlally deternlned during
the interval betveen the rtslng edge of ttl CLK L and
the nexÈ falllng edge of I CLK L. Its value at that
tÍne ls shoun beloy.
BUT (2:0) H IRD CTR (2:l) H LD OSR L
BUT COITROL CODE H
1.5t 6.7

OTTIEtrISE

Ihcn the falllng edge of B CLK L occurs untÍl the rlsÍng edge of
I CLK L, tD OSR L is generated es follous:
DISÀBLE

BUT COXTROL
CPDE H

x
x
B

ll
H
H

2.2.21
2.2.22

OSR
EUTL
H
CTR(2:l)
B
8UT(2:e)
IRD

x
x

5t617
1
1

I
I

Otherrlee

SRVC ENABLE

UVECT H LD OSR L

H
H

L
L
L
L
L

H
H

x
x
x
x
x

x
x
x

0
o

L
H

L
H
H

LI? <l:t) f,:
Íhcsc slgnals are used to create FPA ltAlT L.
?PA TIIT Lg
ltrle elgnal ls aeserted rhen LIT <l: e> . 2
253

nsQ IAELE 2
CS ADDR DATA (SEE PÀRÀGRÀPH 2.2.11

BUt
EUt
JSR COXInOL (2:!)
E GOD3I E

IRD
CtR
(2:t)t

iICRO EITABLE DO lnÈcrnal CS
ADDR
ADDR UYECT SnYC rSEQ
<t5:t!)
L
IIIL
f,
IXIIL

X
x
x

H
H
H

H
L
H

H
L
L

H
H
H

20 (HEx)

XH4XHLHHg
XHIOHLHHO
2or3 X
O H

USTK D<05:00>
+ NEXT<05209>

xxxxLxxxg
xxxxxxxL0
X
x
x

X
x
x

Otheruise

x
x
x

' lr2ror3

HLHHNEXT<OSZOO)

254

t0(HEx)

30 (HEX)

USTK D<05209)

+ NEXT<05: C0)

tl? I ll ---> t rl

LD OSR L <--- t t2
BUr COrtnoL coDE tl ---> t 13

BUt 2 tr ---> I tl
BUr t ll ---> I t5
EUtlH ---> t 96
Llt t ll ---> t r7
T PA TAIT L <--- t ot
rrs?t ÀDm 3 H <--- I 09
usTt ÀDDR I ll <--- t le

aaaoaoa

It t ---> DISAELE III XEX? II
t7 t <--- ECLTL
16 I <--- DO SRUC L
a5 I <--- rsEQ lxt? L
aa t <--- iCLIL
43t<--- usrr De5 n
a2t<--- DISÀ8LE OSR EU? L
tl I ---> ZERO nt xErT t
l0 I <--- iICRO ADDR IXH L
39 t ---> EXABLE IRD ROT H
38 t ---- GROUTD

<---tll
uG ---- r l2 . LID. 3? I ---> USTT OUT EXÀËLE L
ucc ----rl3 . Dfi,X. 36t<--- JSR H
USTX ÀDDR

T'ETI( ADDN 2 H

t H <--- t la

TRD CTR I

---> t l5
--->r l6
--->tl7
ustr Del r ---> t l8
f,Err 0l I ---> t l9
CS ADDR JO L <--- t 2e
CS ÀDDR EI L <---t 2t
ustr Dt2 H ---> t 22
rEXT E2 H --->t23
1{EXT e0 H ---> t 2{
IRD CTR 2
ustr Dec

H
N
H

---- GROIND

aaaaaoa

35 t
3a I
33 t <--32 t
3t t --->
30 !
29 t <--28 t
27 t --->
26 t
25 I

---> CS ADDR C5 L
XETT
H
<:-- xErt '5
,a rl
cs ADm aa t
<--- ustr De3 l|
usTr Dta H
<--- xErt t3 H
CS ADDR C3 L
<--- EXAEI.E UVECT ll
---> CS ADDR 32 L

iSQ FIGURE I
PIN COXFIGURATIOX DIAGRAi AND PITI IDENTTFICATION

255

prcesaon stAtns tnArcres ("!1 1529

t.2a

GEITAL ECTI;ITO:

Í?ris spcciIlcation dcÍines the detail Íequircrents for
vAI-ll/75O conditioina! ricrc-branches and Processor
re9 istcts.
PI
T
'AILE
Pln ldrntlÍlcetlon rrÉ Grte lypc
PIX I

I
2
3

GATE

PTX ID

D CLT EXABLE H
CS ADDN EE L loarl2iÀ
Haus 3e H
PS!. FPD H

raus 33 H

INTERRUP/T H

CS ÀDDR E3 L
CS ADDR E2 L

rEts tl H

l5
l6

EUTOH

l8
t9

m sRlrc L

i3g:illl

HBUS 32 H
DISABLE CS ADD H

GAITXF 2 5

GAlTCx26
GAITZF2T

GAlril28

GAITZE29
GAITNF 3G
GA lt\cx

GAITCI32
GÀITNF3 3
GAITZF 3I
GAITZF36
GAT"NF 37

cÀtII!fF39

EUIIH
Il{H BUT DECODE L
BUTIH

GAI?XF{O
GÀITIIFI I

BUT2H

GAITNT

8UT5H

22
23
24

8UT 3 ll

COTIIEXTS TïPE PIX I

rEus 05 H

CS ADDR O5 L I

GAIT}IF'2
GAITlu'a 3

GA ITIIF' 5

GÀITZFI6

GÀTE

PITI ID

iISC CTL Z TI

GAITÈF
GAITXF

rlsc ctl. 3 H

GAITIIF

TISC CTL H
iISC CTL 'I H

Gà

IRD ADD CTL C H
LD OSR L
TRD ADD CTL I H
IRD LD RNt; H
CS ÀDDR El L IOr-l2ltÀ
PSL CT H

tfBus 3e H
PSL TP H

mus tl H
ríBus 27 H

PHB GD SÀi TH
PHB GD SAII 2H
HBUS O{ H
PTIB GD SAi I H

II CLR L
LDIRT
ilsc c?L 0 H
CS ÀDDR OI L

256

CMEXTS TïPE

, -I2liÀ

IïIIF

G lïil

GAITÈF
GAITTT
GAITïTT
GÀITCN
GÀITTIII
GÀITZF
GAITTII
GAITZF
GÀITZF
GÀITITF
GAITNF
GAITZF
GÀITNF
GÀ I TTF
GÀITNF
GAITTIF
GÀITCN

Pcrfonanca:

2.1

Strte Elcrcntss
Strtus Flag (5:t)c
These 6 bits are built from D Type flip flops. They are
clocked vith the r i sing edge of l{ CLK L rhenever D cLK
ENÀBLE H is asserted. Ttre input data ls as follows:

2.1.1

INH BUT

DE- BUT
CODE (5:0)
LH
H
lor5
(othervise)

PHB
GD

lsc

CTL

({:0)
sAtrt
(2:0) H H
x

.5
O-4 r 6.7

4321

x
6r7 r 0E, CF

gg
wBus5 wBUs4

STATUS FTÀG DATA

wBus3 wBUs2

ofi

wBUS I hrBUSg

tl
5

rrl

0c
I
I

Otherulse
rSee llote I

Otherrise

;

257

cr,anie

Note l:

2.1.2

INH BUT
DECODE L

Às far às micro-code use is concerned, uhen PHB GD sAf{
(2zg) a 5' l,lISC CTL codes 0-5 and 8-0D should not be
spectfted. ln reality houever, if tro different data
sources are specified at once, the input data to the
àppropriate Status Flag is the OR of the 2 sources.
SÈcp CTR (l:C):
Ttris is a 5 bit register built fron D lYpe flip flops.
It is clocked vith the rising edge of ttl CLK L uhenever D
CLK ENÀBLE H is asserted. Ttre input data is as follous:
BUT

PHB GD

(5:0) H

SÀlr (2:0) H

4r5

roc

O-St 7

TOD

0-5t 7

Isc cTL

(4:0) H

STEP CTR (4:0> DATA

0-F, t 0-1 2
l8 lF

STEP CTR I

( oTHERt{ ISE )

0-5r 7
I
I
I

(orHEmrsE)

STEP CTR

WBUS <{:0)

STEP CTR

l5
l6

l4 (Decimal)
39 (Decimal)

NO CHÀNGE

As far as nicro-code use is concerned, conbinations of PHB GD
sÀx (2zo) - 6, IrISC CTL codes l3-l?, and BUT <5:0) - OC or 0D
should not be sPecifled at the sane time. In reality, houever
the input
if trc differenl data sources are sPecifted at once,
sources.
the
of
the
OR
ls
bit
Counter
data to each Step
2.1. 3

PSL Ci:

lYpe f I ip f lop.
Itris is a bit ln the PsL rhich is a llD CLK
L vhenever D
of
edge
uith
the
rtsing
ia is clocked
(2:0)
- 7 then
SÀll
GD
PHB
If
cLK ENABLE H is asserted.
i s no
there
h.
Othervise
l{8US
3l
Èh; input data ts
floP.
change to the fliP
2.1.1

PSL ?PD:

Ttrls Ís a bit in the PSL uhich is a D ïYpe f I ip f lop'D
It ls clocked ulth the rÍsing edge of il CLK L whenever
CLK ENÀBLE H is asserted. The input data is as follows:

258

PHB GD SAH (2:0)

IrISC CTL (4:0)

INPUT DATÀ SOURCE

0-lB, lE, lF
lc

rf8us 21

.06
r06

NO CHÀNGE

OT}IEMI I SE

Às far as nicro-code use is concerned, when PHB GD SAlr
(2zO>. - 7, ttlISC CTL codes lC and lD shoulC not be specif ied. In
reallty houever, if tuo different data sources are specified at

once, the input data t.\ r.he f I ip f lop is the OR of the tuo
sources.

2.1.5

2.1.6

2.L.7

BUT SERVICE

FLIP FLOP

SET
SET
SET
SET
CLEAR
CLEAR
CLEAR

PSL T8IT:

Ttris ls a bit in the PSL uhich is builÈ fron a D lYpe
flip flop. It is clocked wiÈh the rislng edse of il CLK
L utrenever D CLK ENÀBLE H is asserted. If PHB GD SÀlr
(2:e) r { or 7 the input data is wBus 04 H. otherwise
there is no change Èo the state of the flip flop.
BUT SERYICE Fltp Flop:
Ttris is a state elenent used to generate PSL TP H. IÈ
is bullt fron a D Type flip flop and is clocked vlth the
rlslng edge of il CLf L. The lnput data is LD IR L.
tíhen LD IR L is asserted the f I ipf lop is set.
PSL TP:

Ttrls is a bit in the PSL uhich Ís a D lYpe f I ip f lop.
IÈ ts clocked vlth the rising edge of lr CLK L. The
lnput data ls as follors:
I,I ISC
INPUT DÀTÀ
D CLK
PHB GD
DO
souRcE
SÀi <2:0) CTL (4zO)
ENABLE H
SRVC L
. 0-6
PÍ;L TBIT
X
tl
H
X
PSL TBIT.
L
x
H
. 0-6
No CHÀNGE
0-F,10, I l, l3-lF
H
L
NO
CHANGE
X
x
L
L
NO
CHANGE
X
x
L
x
.7
ÍÍBUs
llr
l3-lF
30
H
a-F
l0r
x
r
.
0
t2
H
0-6
x
I{O CHANGE

OTHEil ISE

.Scc lloÈe l.
I

259

Notê I:

ts far as micro-code use is concerned, vhen PHB GD SÀl{
(2zO) = 7. l,lISC CTL eode 12 should not be specified. In
reallty houev€r1 if the tuo nlcro-orders are specified at
once, the lnput data to the fllp floP ls the OR of the tHo
sources. If PtlB GD SAl,l <2:0) - 7 rhile the 8UT SERVICE flip
flop ls setl m SRlrc L ls not asserted, ànd D CLK ENABLE H ls
asserted then the Input data ls Èhe OR of PSL TBIT and WBUS
3e. Also if trlsc cTL ({:e) f 12 vhile the BUT sERvlcE flip
flop is seÈ, DO SRVC L ls not asserted and D CLK ENABLE H is
asserted, thc lnput data ls PSL TBIT.

2.1.8

FIRST tRDx Fltp Flop:

Ttris is r state elenent used to generate IRD ÀDD CTL
(l:0) H and IRD LD RNUIi H. IÈ is a D TyPe flig flop
rtrlch ls clocked vlth the rislng edge of M CLK t
whenever D CtK ENÀBLE H is asserted. The input data ls
as follous:
INH BUT DECODE L

BUT <5:e)

INPUT DATA SOURCE

{r5

I
NO CHANGE

ol'nEmIsE
2.2

Pln DrecrlPtlons:
Certatn input plns are defined as having 'Skew látches'.
Ttese are feed through lttches that are oPen lhen Èhe
clock ls not asserted and closed rhen the clock Ís
asserted.

2.2.I

2.2.2

T GLf, L:

ttrls ls the clock assoclated rlth the nicro-seguencer.
t cll( L ls used to latch all state elernents in PHB.
D CÍ.Í EIABLE B:
ttrte clgnal ts used to enablc lt CLK L uhen clocking:
STATUS FT.AG (5:E>
STEP CTR ({:0)

PSL CT

PsL FPD
PSL TSIT
FIRST IRDX fl tP floP

260

2.2.t

2.2.4

2.2.3

I,D TR L:

thlr lnput 3Ígn.l lr uscd ro loed rhc Blrr sERvtcE f ltp
Ílog. tt lr r.eclvcd through . slGU lttch cloclcd rlth
t CLI L rnd lt lr thc lrtched vcrtÍon th.t is.eturlly
ured throughout thlr .pccÍfÍcatlon.
D STVIC L:
Ílrlr rlgnel tr ured to ganGrête PSL TP H. It is
rGeelved through r akcu lrtch cloctcd rlth I CLI t and
It lt the lrtchcd vortlon th.t is actually used
throughouÈ thlr tpCclf lcetlon.
?I GD SAt (2:f) l:
llrerc rlgnals rpcclfy thc function to bc gcrforrcd by
thc IBUS I lncs uscd by PllB. ïhcy selcct thc sttte
clcrcnts:

STATUS FIAG <5:t)
STEP CTR <l:C>

PSL Ci
PSL TP

PSt FPD

PSL t8l?

end control thc rctdlng cnd loeding of the ePProPriatc
ScG Peragrrph 2.2.12. Ttrcy tre rcecived
f I tp Ílopc.
through slcr lttchcs clockcd vlth i CLf L cnd lt ls the
lttchcd vcrllons th.È .rG actually uscd throughout thts
rpocl f lcet lon.

2.2.6

IISC CIa (l:!> lr

Íterc rlgnrlr ..- -i t tcld ln the crlcro-vord uscd :o
Control vrrlOuc ttctè clcrcnts. Thcy are uscd hcre to

ganartta s

STAII'S FTAG (5:t)

SttP CtR (l:C)
PSL FPD
PSL tP

TRD LD RXI! H

ttrry .rG rccclvcd through skcu làÈches clocked ui th lr
CLf L and tt ls thc lttchcd vcrslons that are actually
urod throughout thls sPCclflcation.

26t

2.2.7

lllt <5:f) l:
Ítrcso signel s rete up thc Êrench field
eÍcro-rcrd. Ttcy erc used to gcnca.tc

tt:e

stAtrrs Ft.tG <5:?>
SIEP Ctn <l:3)

FIRSt IRDI flip Ílop

CS ADm <tS:tf> L

InD ÀDD efL <l:t> ll
TRD LD NTI! II

ttrey .rG (Gceivcd through sler latches clocted ui th ll
Clf L tnd tt is thc l.tchcd vcrsions th.t .lG actullly
used thronghout this sPCciÍication.

2.2.t

TII T3'T DCCIODC L:
Tlris signal indicetcs th.È no decoding of thc Bttt f icld
should be donc. It is used vherever ElrT <5:C) ll .rc
used.

It is rcceived through e siev latch elocted uith lt CLR L
rnd it is the latched vctsion th.t is ectuelly used
throughout this sPcciÍ icetion.
2.2.9

DTSILE CS TDD X:

Ttris signal is used to lnhibit thc effects oÍ branch
conditlons tn torrtng Èhc CS Mdrcss. lt is incltded in
thc acncration of CS ADDR <t5:0t> L.
2.2. l'

LD OSR L:

Ttrls slgnal spccifics vhcn thc OSR is bcinq loaCcd fro
thc XB and is uscd to gcncr.tc IRD ADD CtL <l:t) B end
IRD LD RTTN II.

2.2. ll

IITERRUFT B:

ïtris rlgnrl ls uscd Íor brrnching and is inclrrdad in thc
ganeration o[ CS AD:R <05:Ol> L.
2.2. 12

nus (3lr3tr2?> I
HBUS <C5:tt) tl

Ttcse tri-statc lincs rrc prrt of thc IBUS $rich is used
for reading and rriting thc st.tc clcrcnts in thc chip.
They àre controllcd by PUB GD SÀI <2:e) es follovs:

262

PË8
GD

rBus
5lI
<2zl) USE
o

XOIE

; ourpur

OUTPUT

TBUS

z (ltlclt trPEIlANcEl
PSL Ci
PSL tP
PSL FPD
STATUS FIAG (5:0
PSL CII PSL TP PSt FPD Z PSt TBtt Z
Z
Z
PSL Ci
PSL tP
PSL FPD STATUS
STEP CTR <,f :0)
FTAG 5

INPUT

Deta to bc loadcd lnto PSL TBIT

Ir|PUT

Data ro bc l0adcd Ínto sTÀTus FtaG <5:c)

I1{PUT

Data to be loadcd lnto STEP CTR ({:e)

IXPUT

Deta to be loaded tnto PSL Clll PSL TPr
PSL FPD And PSL TAIT

Ihe eract TBUS bits used as lnput for thc vartous reglsters ts descrlbed ln
Paregraph 2. l.

2.2. 13

CS ADDR (l5rlf)

lhcse slgnale ara used to generatc branch condttlon
oftscts. (Xrtglde the chlp thcy arc ORcd rlth othcr
sourcGa of CS ADDR <13:9C) L to forn a dastlnotlon
addrces. Tàcy arc eourccd by PHB .a shorn ln PHB Chart
l.
2.2.14

PSL CT 8:

2.2.15

ttrls slgnal ts Èhe output of the PsL ctl f I tp f lop.
PSL ÍP f,:
tfile slgnal ls Èlhe output of the pSL TP fltp flop.

2.2.16

PEL ?PD B:

ffils slgnal ls Èhe output of thc PSL PPD fltp flop.

263

(íIt

Dlt- In
r|tf
rot

Ct
rD

[l|rt
Goc (trt)

C8 Am (!5rrt> I

ILT,''3.8J
I
t
t
I

nusrs rBrrstt ïErrst3 rElrsr2 rBlrstl

9
A

a
a
a

L
L

a
o

o
e

a2
a

Fustl

aa-

IBI'ST'

Frrstt

musrS

.xo?.stAtus a

FI.ÀG I AXD
IT?SRRUPt

Gao

ST?P CTR S?EP CTR

)rl

.2OR3

3
0

a
e

llf

o
g
a
o

a
a

s?EP Ctn

STEP Cll .

loR30R

SIEP CtR )r a
ATD IXTERRUPT
IBUS <l:t) /
a

t
t

L
L

ll
ll

tl
ll

stA?us 0
FI.ÀG 2
a
o

o
o

l5
L

L
L

u
H

OTËENISE

l6
l7
l8
l9
IA

s?ÀTus

FIAG I
stÀTus

STATUS STÀTUS

FIÀG 2

O
I

o
a
a

5
g

0
o

a
o

FTÀG I

STATUS

FT.IG I
o
0
o

PË8 CHART I

26tl

FTAG I

rBus 3!

PSL ?PD

stA?t s Dl^G e
STÀTUS TIAG
a

STATUS FTG 3
c
STATUS FIÀG
2 XrR
STATUS FIAG 3

STAII'S FTAG

0
e
0
e

STATUS FTAG 5

rBus 3e
o

2.2.17 tfD fD CIL <lrt) lr
thor rlgnrlr lndlcrtc rtrcthcr branchlng Ít to bc donc
on oParatÉ rpeclf le lnÍorrrtton. Írcy .re gcncrrted .s
follorr:

DIS- IIf,
cs DtAELE II'"

IRD

PSL
Ci
FLIP

ÀDD CODE IUT
(5:t)
B
L

FTRST

?tOP

ADD

IRDI
DLIP

tD
OSR

?l,OP

qTL

<l:f)

f,xI

TITO

X
Ft 5,l8r 19
L
L
U
tm5
LtrIt
LËII
LËI
LB19
LIICLIATILI
ifttcllttlL!

CttAR
SEt

r
X

L
X

s8TXX2
CLD.AR
SET
TTX3

T
CLEAR

otrfxtsa
2.2.1a

D
ct.t

tlsc
clr
(I

I I)
EITTIT
B
I

tlD lD IL lt
lila rlgnal 3P.ctll.a uh.n tha lI|!
loadad. lt la g.n.iatld la folloE:

tsl
cr

?LTP
?tOP

llnal
ltDr

?LIP
FLOP

rcgl3tcr lhould bG

lrl
lu?

DECODE BIN
(5: l)
L

OSR
t

tRD
I.D

RXI!
ll

IXrxxxtH
LITXXXHL

tllrxxxHll
IO?II T
T

X
XOtlt I
Ë
CLER
X
t
I
ËlsEtctEÀRHIHH
ËISETSETHIHT

ll
H

omErtsE

265

NOTI
I

ll o
H

L
L
L

D Ct^l EIASLE I

ttr---> es Atpn tl L
a7t<--- rlsc erL I r
16!<--- LD rR L
rc tfa
a5t<--- i clr L
PSL EPD H <---tts
lar<--- Pf,E GD Sri I H
r8lfs ,3 a <-->tt6
a3t<--> rDus oa x
txtEnRut'.t B --->tr?
t2t<--- pf,t cD sri 2 l|
cs ADm ,3 L <---ttt
tlt<--- pi! cD stur t rl
cs ADm a2 L <---!09
att<--> nus 27 x
Ix) sRrc L --->t lt . .. o.. . 3gt<--> rElrs 3l E
rBus tl [ <-->tll .
. 3tt---- GnotrD
uG ----t 12 . LID . 3?l
vcc ----t 13 . DCtr. 36t<--> nus 3t f,
rDus t2 l| <-->tla .
o 35t---- GnottD
DlsraLE cs ADD lt --->tls ....... 3ll---> psL cr tr
BUt I f, --->!16
t3r---> Cs Au ,a L
EUt I f, --->tl7
32t---> tRD t-D ill! f,
IXlr Bnt DECODC L --->tlt
3lt---> IRD AtO erL I I
BUt a x --->tl9
3!t<--- I^D OSR :
8l,t? 5 n --->t2t
29t---> tRD ADD ert. , I
BUt 2 n --->t2l
28t<--- irSC CrL 3 !
Blrt 3 t| --->t22
27t<--- itsc CTL I Ë
FUS a5 H <-->t23
26t<--- rrSC CtL a n
cs AD8
t <---t2a
25t<--- itsc erL 2 tr
'5
--->tcl

cs Am ct L <---tt2
FUS 0' B <-->t03

DtrI FIGINE I
PTX COiFIGURATIOT DNGTII àID PII IDCITIEICÀTI(I|

266

t.2l
L.

pRBFBlef, COTtnoLLER CXrp (?nr-862t'
GEIENAL DTSCRIFIIOI:

PRK lr

! control chlp vtrlch ronltora ustgc of rcrory
lnterfacc rorourccs and strlls the CPU rhcn lt detcets
rn attc.Pt Èo utG a rcrourcc vhlch lr alrcady busy. tn
addltlon, PRtr controlc l-strca. prcfctchtng and
generrtes several control stgnals for thè ADDRESS chip
blt slleês.

267

ttl tArll I
Pln tdentlllcrtton rrÉ Grte

ttffl
lPIr | | Pfr lD
lz
l3

EIAPEËOt CTII L

l5
l6
l7

GAITTF

STALT L

GAITil

PRE?ITGI L
EIA VA SAVE L

GAltïrr
GAlrnt

UTRÀP L

GAITNF
GAI1r|F
GAITNF

GAITll|

i CLT EITTLE II
D CI.I Ef,À8LE B

l15

lr6
l17
lr8

G ltt{F

IÀI]CBED BUS 3 H
SIATUS VALID L
IÀICUED TCTRL I

l19

GAITNF

GAITilF

xBt til usE L
xBt tlt usE L

|2s

l2t

122
423

12.

I
I

GAITTX

GAITlr|

IÀTICIIED TC?RL 3
XB SELECT II
EIIÀ FC L
I,ATCIIED HC?RL {
I,AÍCHED TC?RL 5

GÀITIIP

GAIrIï

GAITTN

GAITilF

H
H
IÀTCïED TCTRL 2 H
TAlICUED TCTRL E H

8US{H
I XBFCOIH

GAITNF

GAIIl|F

GAITNF

GÀIïïF

TAT(CËED BUS

IA11CIIED BUS

Itl

PSL Clt ll

32
33

IAIrCUED BUS
DST RIIODE H

36
37
39

tRDl tl

t2
t3

GAltxF
GÀITïF
GAITNF
GAI?IIF

XBFC'OH
ISIZEIL
LD OSR L
ISIZEOL

GAIINF
I

I
I

TÀ SDLECT SE H
IA!C[8D iSRC I H

lr.
l15
tr6

| rA SELECT SI

II8

ILÀTCIIEDTSRC2H

1.7

GAITlr|

t^TCtrED NSRC O H

I
I
I
I

GATTTX

lrÍcï rt t

fr,
lrr
lrr

GAITXF
GAITXF

rs?Q trtT L

t'
I cAtt TlPt I
G ltrF

EHETD ACY S?ALL H

BCLTL
PBÀSE I I
NUT SEL SI H

25
26
27
28
29
39

I c(;;l1rs
ttl

"tp.

tÀllcnED nsRC 'I3 H

268

GÀIlTtIF
GAITNF
GAITITF
I GAITNF
I GAITNF

I GAlTllF
I GAITTT
I GAITNF
I GÀITNF
I GAITTF
I GAITilF

IGAITNF

I
I

I
I
I
I

I
I
I

Prrlorrrnca s

Pil r./o
IIIPUTS

IPINS

BCLKL
H
D CLi EIIÀBLE H
DST RIODE H
I SIZE (l:0) L

I
I
I
I
2
I

Btf,s {

IRDI II

IATCf,ED BUS (3:e ) H
I SCllED IISRC (l:0) H
IITCHED TCTRL (5:E) H

{

LD OSR L

]I CLX ENÀBLE H
NSEQ INIT L
PHASE I H

I
I
I

I
I
I
I

PSt C|| H
s[APslrot ctrl L

STATUS VÀLID L
UTRÀP L

XB PC (OlzOA) H

oUTPUTS (TOTEi POL!'

I
I
I
I
2
I
I
I
I

ENA FC L
E}IA VA SÀVE L
ENABLE ACV STALL H
TÀTCH 1'IÀ L
nA SELECT S<l:0) H

rtrux sEL sl H
PRFFETCH L

STATL L
)(B SELECT H

XB<l:e) Iil USE L
2.1

Itre folloring

ttlSRC codes are of

interest in the l,tEl,lORY

INTERFACE:

(HEX) L2.

SOURCE

TIDR

13. souRcE TDR
17. souRcE XB

18.. souRcE lrA
19. SOURCE PC SAVE

lA. souRcE PC

IB.
IF.

SOURCE
SOURCE

vÀ

TB DATA

IISRC Functlons are decoded fron 'IÀTCHED I|SRC (4:0) H'

269

2.2

ïtre follouing is a list of Èhe eode assignrents for the

BUS FUITCTIOX tticro f ield:

O. READ PAYiTCTT ADDRESS
I. PROCESSOR INITIALIZE
2. READ, l{O iICRO-TRÀF
3. r/o INITTALTZE
.. READ LOCK TIiEOUT TEST
5. rroP
6. READ, SECOND REFEREIrcE
7. NOP
8. |RITE PHYSICAL ADNRESS
9. REI CHECT

2.3

A. HRITE, SECOXD REFEREIrcE
B. HRTTE UT.LOCK, SECOTTD REFERExCE
c. HRITE, f,O HICRO-TRAP
D. NOP
E. HRITE LONGIíORD, NO IIICRO-TRAP
F. BUS GRAIT
I9. READ
II. REÀD LONGTORD
12. PTE ACCESS CHECK, ]SRITE
13. REÀD LOCK
I{. REÀD TITH NODIFY INTENT
I5. READ LOIIGTORD T{ITH TODIFï INTENT
16. PTE ACCESS CHECK, REÀD
17. pTE ÀCCESS CltECK, READ, |(ERNEL F|ODE
18. hRtTE
19. WRITE LONGilORD
IÀ. T{RITE IF NOt RTTODE
IB. HRITE UNLOCK
lc. pRoBE ÀCCESS, WRITE, ttODE SPECTFTED
lD. PROBE ACCESS, IRITE
IE. PROBE ÀCCESS, READ, TTODÉ SPECIFIED
lF. PROBE ÀCCESS, READ
Bus Functions are decoded fron 'LÀTCHED BUS 1
H' ( FLIP-FLOP) and
H'
'LATCHED BUS < 3:0>
Ttre follouing is à list of the code assignnents for the
upper half of the bTCTRL ricro f ield:
29. vA
PC
RESERVED
2I.
22. VÀ
23. nDR <- (WBUS)
24. PC
25. VÀ
26. l'ttsus <- wDR
27. t{DR <- 0
28. TB DATA
279

VTLID BIT <'.YÀ <- (Ítus,
'
llnv.lldat" both 9!oup3 .t th. indcr position
rddÍ.33cd btf YAr.
A. XDR <. (I!UB' UINOTA'ID
28. ltn <- IR, ZERO EXTEXDED
2C. PC <- FC + (HBUSI
2D. CÀCIIE YALID IIT <. O
vÀ <- (Btst
(Invalldltc both groups .t th. lnder posiÈion
rddrlr3ld by và. ttc rddr..s ln th" vA teglst.r ull!
bc lnt.rpratcd rÊ a phtrlc.l àddrcsar.
2E. tDn <- (tausl
2F. |rln <- osn, zERo EXTEIDED
la. STÀIUS,/COXIROL IEGIS?ER <- IBUS<27:2a>
ll. PIEVIOUS IíODE REGISTER <- IaUs<23322>
32. HBUS<27:2a) <- SÍÀIUS,/CONTROL REGTSTER
33. BtS GnÀXt
trDtls<2|: 16> <- tPL OF CUtnEXt UIIBUS GRAIrÍEE
34. sTAfUs/CoxlRoL ÀDDnESs iEGISTER <- HBus<27!21>
35. PREVIOUS IiODE REGISIER <- CURREIT IODE REGISTER
TIIEX IS/CUnRE T llolrE REGISTER <- HEUS<26:2{>
37. REI CltECi
38. ÀSILVL IiEGIS'ER <- WaUS<26:24>
!9. (RESENYED'
3t. 18115<26:21> <- ÀSILVL REGISIER
38. (RESERVED,
3C. IIIGHESI SOFIïÀRE IPR REGISTER <- ÍfBUS<20:16)
3D. tPL REGISTER <- ïlUS<20:16>
3E. RESERVaD
.
3F. íBUS<21:16> <- lpl OF lÀST UtllEUS GRANTEE
íCTRL tunctions are dccodad fron 'LATCHED $CTRL <5:0> H'
Daflnltlons:
Stgnal
tnt.anrl
f.LÀTCBED 8US a t. - JK FLIP-FLOP (RISING edge of '8 CLt(
Lrl J I puf3
'lt CLi EtlÀ8LE ll' t 'aus tl H'
K ttlPUT:
'r| clr EI^BLE tt' a 'BUS a L'
rrAUS CyC DEC ltr ls TRUE fot .ny of the following Bus
Functlon D?codÊi!
REÀD pltISICÀL ÀDDRESS
REÀD, IIO TTICRO-?RÀP
REÀD tIrct( TIXEOUT TEST
READ. SECoxD REFEnEI{CE

29.

2.1

íRITE PITISICÀL ÀDDRESS

TNTTE' SECOXD REFEREIICE

271

HRITE UILOCK, SECOXD R€FEKEXC€
rRr?E, Èo itcRo-tRAP
HnITE u)xGIoRD. Nc tlcRo-TRAP
aus CRÀxt
READ
REÀD II'XdORD

REÀD lIrCf,
REÀD IIIá iODIFI If,?EXI

REA! LoxGtoRD HtTIr roDtFr txTExt

tinl?E
hRt?E LorcroRD
I{RITE uiLocx
oR

htltE IE llOt RI'ODE t 'DST RFODE L'
BUS GnANt DEC Í' is TRUE for: (Bus Function D.codcl
BUS GRÀ[t

r'Btls REO ' is TnUE for: íICTRL Decod.s)
Í23+26 +27+2e + 29+ 2À+ 28+ 2D+ 2E+ 2Fl
OR

Àny 8us Function Decod. ExcEPt:
PROCESSOR INIIIÀLI2E

t./O rNtrtÀLtZE
NOP

.'DESI llDR H' is ?RUE for .ny of tha Íollouing HCTRL
Dccodes:

lrDR <- (HAUS)
Í|iDn <- 0
ÍíDR <- tR. ZERO ETTEIDED
iIDR <- OSR, ZERO EX?ENDED
DEST r|DR l|'
Decodês:

ts TRUE fo! alry of thê follouing ÍiCTRL

IDR <- (HBUSI

HDR <- (TAUS} UNROTÀTED

r'hSRC XB H. ls IRUE fo!: ÍÈSRC Decode)
SOURCE XA

PA Bts REQ lt'

luncÈlon Decodes:

is TRUE fo! any of the folloring Bus

272

tll TCCESS CXECr. ftltE
ttE TCCESS CllECl, tAÀD
ttE rcclsE ctEt. tEÀD. IÊ EL iODE
tn6? lcclss. rtttE. roDE sDtctftED
PnO!? tCCfSS, ItttE
?NOIE ACCEES. READ. iODE STECIFIED
PNOiE ÀCCESS, READ
On any oÍ tb? follorlnt IíCTRL Ècod"3:
ta DrtÀ <- (rBus,
tD VÀLID lll <- ,
vA <- (nus,
CACIIE VALID IIT <- C
yA <- (nus,
FEIA LD OSI ||'lr
th" nlctl TRUE output ot rn RS
FLIP-FLOP fhllr

ls sct by!

Í'E cLi ll' r 'PllÀsE I L''
tasct by!
'nd
(ra clt t|. r .plrAsE I 8.,
..CLi OSR tl' i. thc Hlcll IURE ouÈput of. lrtch uhich ls
cn.blcd duÍln9 'EXA LD OSn H'.
'LD OSR H'
.'BITES tEQ 0I' t3 TRUE if:
í'I SIZE l' a 'trSRC rag.l|'t + .IRDI
.ror.
lt.)
Í.tSnC 13' f. s (.LD OSR
T.EITDS p;O I 11. t3 tnUE lt!
(.I SIZE I I..LD
t .llSRC tA t.t +
oSR lt.3.
sRC xB !.,
i.rnOr l. f
..AftES REO 11. ls TRUE lf!
.pltASE I F. e (.UTES nEe I B. + .Bt"fls REe 0 lr)
r.SOTll tBS R8O H' ts TRUE lt3
(.?c tl B' . 'BYl8s
REQ I H' r 'BYIES REo 0 :t') r
(.rc 3a t. Í rBrTEs R8Q I .ByrEs
H' r 'BTTES REo e h'' +
(.pC tl lt. a.pc,oe F. r
REe r h.l
r.DESr FC B. ls tRuE tf!

273

l2a . rcl (lctflL Ècodcst

"FC ltÀBLË l' i5 ?nUE i Í:
'uln^P L' 5
Í'eÍfES nEo I !|. . 'bftcs REC t n. . .DES' FC fi.1
i. ÍI)AD PC B' iS ltUE iÍ:
.DESI FC Í' . 'FC ETABLE II' I 'F CL.l IIABLE Í'
l'P'C CLI nEo ll' - Jr FLIP-FLOP íFALLIIG êd9e of '8 CLÍ

L., J txPu?:

.PIIÀSE I T' T 'FC ETAELE H'

i lxPut:
('PllASE I ll' a 'PC EïA3LE L'l

(.i cl.i Exla LE Í. a .ctc tf PR(rc Í.1
r.ToccLE 2 H- ta muE tÍ:
(.Fc ExàaLE r..BnEs
a .i c..i ExAaLE r.r a
(.pc 0t lt. +
REQ I r|., r,
('?c 8, l|' + 'BrtEs REQ I l|'l e
('PC tl tl' + 'BITES REO G r|'l a
('Al'.tES REQ I ||' ] 'BlrTES REQ tr H']
.'StEER C(nP DUIP I' is lnUE if :
CIC I'EC tl' t'BUS GRAI.T DEC L' ó
'BUS
.tllcBED
BUS 3 t|. a rpSL Cl| lt. e .D CLf, EXAALE r.
.STEER DtIlP l|. is ltUE it:
.LOAD ?C $r + .SIEêR C(np DUip lt.
l'PllÀSE 2 DEL ll' - D FLIP-FLOP (RISllG Gdgc of 'B CLfi
L.t D ll{Put:
.PltÀSE I L'
the floP is DC claàr.d vhên rP[AsE I H' is TRUE.
l'LÀTCllED AUS I Hr - JR FIIP-FLOP (RISIIIG Gdge of 'B CLK
L.) J ITPUT:
'lr

|( rl|pur:

cL|(

E AALE

'AUS

.lr cLK EIABLE lt. e .Bus a L.
f' LÀTC|iED UIRAP H. - JR FLtp-FLOp (Rtstxc.dgê of rB CLR
L't J INPUT!
271

.UTRÀP II'

I lll?Uf:
'AYrES nEo l|' + 'LOAD PC H'
thc flop 13 Dc PRESET ehcn'isEQ tltr

lt' ts tRuE'
|.PREFEICH DEL lr. - D FLIP-ILOP (RtStXG €d9ê of .8 CLK
L.t D tIpUT3
.PREFENCH H.
Itr. floP t. E ctc.rcd uàen 'PREFETCn H' ls FÀLSE.
l'PRErE|rCll CïC F' - D FLIP-FLoP (nlstl|c êd9. of '6 clr
L't D IIPUT3
.PREFEïCII DEL II'
lhe flop ls DC PnESET rhen 'PREIEICII DEL H' ls tRUE.
l'STÀTUs VÀL ll' - D fLlP-FLoP (RlsING edge of 'B cLK L't
D tNpuT!
.iSEQ INIT H'
ïhê flop ls Dc PReSEt lf:
.Ê clt( L. r . stÀTus VÀLID ll. 3
(.iSEQ lNtT H' + 'SlAlUS V^L DEL L')
I.S?ÀTUS VÀL DEL l|. - D FLIP-FLOP (RtSl G êdge of 'B CLx
L'l D tNPur!
\
'sTÀrus vAL ll'
l.AaontED cïc 8. - Ji lLtP-Fr.oP (RtstIG edgê of 'B clt(
L't J lxPut:
TPNEFE'CH DEL II'
'S'EER DI'I'P It' ! .STÀTUS VAL L'
'
X ti|put!
rS?^tUS VÀL 1. + r;SEe INIT H.
l.FORcE BUS ADD n. - JK FLIP-FLoP (RtsIl|G edge of '8 clt(
Lr' J lXpUT3
.PNEFETCII L' I TtI CLR ENÀBLE II' S 'BUS 4 It'
t( tNput:
TPREFETCH H. + (.H CLI( ENABLE H. I .BUS 4 L.t
i'STEER VÀ H' is IRUE lf3
275

H'''i
CLK EITBLE II'
'PREFETCTI L'
'
'
'|rEÍí REO ||' is ?RUE it:
'PREFETIC'I DEL í' +
('aus cyc DEc B. e 'PRElEtcH f' ó 'RÉPt cEiENT L't
.-RE'L cErEr{r h. ts ttuE it:
.STATUS vAL I. r -ADD ExA DEL L. a .READ È.
T.ENÀ }TSRC ADD N. iS TRUE iÍ:
('PRIIETCH L' a 'PIASE I Í', r
'BUS

ISOURCE: liÀ + PC + PC SÀVE + VÀ(ÍíSRC Decodès, ]

"PnEFETCí tr{H t|' is ?RUE iÍ:
.IÀTCIIED UTRAP H' T 'PRETETtI DEL L' t
'AYTES REC L'
I'ADD REG Er.À H' - Jx lLlP-FLoP íRlStNG êd9ê of '6 CLt(

L'I J I PU?:
.Ètt REQ H' 5 .IltVÀL CI|ECK L. r .Ctr t[ PROG L.
X INPI'T:
'PREFETCII cYc H'+

'r cLl( ENÀELE H'

l.ÀDD Er|^ DEL lr' - D FLIP-FLOP (RISIXG cdgc of .8 CLK

Lr) D IXPUT:

.ADD REG ENÀ H'

16ê flop is Dc sct rh.n 'aDD REG ElÀ H. ls tRuE.
CYC IN PROG H' is thê HIGH TRUE output oÍ
rL!P-FU)P rhich is sGt by:

.n RS

.ADD REG ENÀ r.

ànd rasct bY!
.STATUS VÀL lt.

.'READ ll'

is the HIGH ?RuE ourput of . làtch rhich is
cn.bled during 'ÀDD REG ENA H'. LATCII lÍrput is!
.PREFETCII HT +

'TÀI€TIED BUS 3 L'

TTREAD CyC B. is TRUE tf!

'PREFETCII E. +.REPrÀCE|íENT H'+
(.CyC tN pROc Hr Ê.ADD REG ENÀ L. r REÀD l|r)

276

,'nUX Sl H'- D ÍLIP-FIOP (RlSllfG cdgc ol 'B CLÍ L',

D IIPU?:

('SIAPSHO? Crl L' ó'XB STALL L't
L.' 3 Í'EIA iSRC ADD l|. +

'l.ATcllED XB STALL

('ctc lx PnoG Lr r 'PREFEïCH L'3 scuncE Te DAtA(trsRc

Dccodcl I I

Itrc flop Ís E CLEARED vhen 'PHASE I H' is FALSE.
.'llUX SEL Sl H' ls TRUE lf:
'illux Sl H' + ('PHASE I L't'PA 8US REQ H')
..RESET ADD ENA H. IS IRUE Íf:
.PREFETCI CTC H' + 'li CLK EIIASLE H'
JK FLIP-FLOP (RISI]IG edge oÍ 'B CLI(
f 'ltlVAL CHECi ll'
TIPUT:
L',l J
('it|UX SEL Sl L' t 'SI|ÀPSHOT Clll H') t
REG ENÀ L' & 'CIC IN PROG H') +
[.TEi REQ L. + (.ADD
('ADD REG El|À H' t TRESET ADD EXA H'l I
K INPUT:
.SNAPSHOT Cl|I L'

l'tNVÀL XRITE ll'
L') D IXPUT:

D FLIP-FLOP (RISING edge of '8 CLI(

. INYAL CHECtr H'
Ttre flop ls IE cleared vhen 'ltlVAL CHECK H' ls FALSE.

l.DEltI H.
D II{PUT:

D FLIP-FLOP (RISING e<lge of '8 CLI( L')

(.INVAL CHECK H' E .PA BUS REQ H'}
..LOÀD iDR H. iS TRUE IE:
.STAIUS VAL H. T .REÀD H. E .PREFETCH CYC L.

l't|DR LDD H' - JX FLIP-FtOP (RISING edge of 'B CLK L')

J INPUT:

ILOÀD TDR HI

r INPUT:

(

'8US CrC DEC H' t 'tlTcHED BUS 3 L' t 'D CLT( ENABLE
Ht
I'XB SEL DEL HI D FtIP-FLOP (RtSlNG edge of 'B CLI( L')
277

D I IIPUI :

'xB sEL h'
f 'x8l LDD lt'
J IIIPUT:

JK FLIP-FI.ClP (RISIXG edge oÍ '8 CLtr L'l

.STATUS VAL H. I .PREIE?CH CTC H. 5 .IB SEL DEL H- 5
PIC L'f
'-SÏEER CO;P DTIP L'

.AEORTED CïC L'I'LOAD

K IIIPUT:
'STEER C(nP DlnP H'+ 'LCAD PC H'+'ÈSEC INIT H'+
('TOGGLE 2 H' ó 'XB SEL Lol

|'XBC LDD H' - Jf ELIP-FIOP (RISlrG edge of 'B CLi L')

J INPUT:

.STATUS VAL H. E .PREFETCII CTC H' T 'X8 SEL DEL L' I
'ABORTED CïC L'5'LOÀD PC L'E'STEER CGP DIIP L'

K INPUT:
'STEER C(nP DlnP H' +'IÍ)AD PC H'+'ÈSEC INIT H'+
('ïoGGLE 2 H' t 'X8 SEL H')

.'RESET XBI LDD ll'

is the HIGH TRUE output o[ . latch
rhich is enablcd during '8 CLtr H'. LÀïCH Input ls:
('STEER CilP DtlP H' + 'LOAD FIC H') +
Í('x8l LDD H'+'ÀBORTED CYC B'+'xB SEL L' +
'PREFEÍCI| clc L' + 'STATUS vÀL L') I
('XBl LDD L' + 'iSEQ llllt H' +
'TOGGLE 2 H' t 'XB SEL L') I
ilRESET XBe LDD H' is the HIGH TRUE ouÈput of a latch
ràich is enabled during 'B CLtr H'. IÀTCH Input is:
('STEER COiP DlltP H' + 'LOÀD PC H') +
[('XBC LDD H' + 'ÀBORTED CïC ll'+'XB SEL H'+
.PREFET'CH CYC L. + .STATUS VAL L.I &
('xBc LDD L' + 'trSEQ INIT H' +
'TOGGLE 2 H' t 'XE SEL H')l
f'XB SEL H' Jl( FLIP-FLOP (RISING edge of 'B CLX L')
J INPUT:
.RESET XBI LDD H' E 'RESET XBC LDD L'
K INPUT:
.RESET XBO LDD H'
..XB REQ H. is TRUE if:

278

('XBl LDD L' + 'XB SEL H' + 'BOTH XBS REQ H') r
('XBo LDD L' + 'XB SEL L' + '8OTH XBS REQ H') &
(TBYDES REQ t H' + 'BffES REQ g H') r
('xBl LDD L' + 'X83 LDD L')
rT!.ILL )(B REQ H. Is TRUE if :
('STATUS VAL H' t .PREFETCH CyC H. r .ABORTED CyC L.)

t ('XBl LDD H' + 'xBg LDD H')
T.PREFETCH REQ H. Is TRUE if:
('XBl LDD L' t 'XBg LDD L') +
[ ('xBl LDD L' + 'xBg LDD L') s
(TPREFETCII CYC L' + 'ABORTED CYC H') I
.TENA PRE ADD H. is TRUE if:
ITOGGLE 2 H. + .STEER COIIP DUIIP H. + .LOÀD PC H. +
.
.
[ PREEETCH REQ H. & (. II C LK ENÀB LE H. + PREFETCH
H'' I

.'FORCE VA H' is TRUE if:

('ENA IrSRC ADD Lr & 'ENÀ PRE ADD L') +
('ENÀ IISRC ADD H' t 'IATCHED I'ISRC I L' t I ÍITCHED
trsRc o L')

,'llA SEL Sl H'

D INPUT:

D FLIP-FLOP (RISING edge of rB CLK L')

'STEER VA H' +
'FORCE VÀ H' +
(

' ENA I|SRC ADD H' t 'IÀTCHED l,lSRC I H') +

[.ENÀ PRE ADD H' r .PREFETCH
CYC L' + .ABORTED CYC
(.CYC III PROG L' +
H.)t t [.8OGGLE 2 H, Ê ('XBl LDD L'+ 'XBg LDD L') +
TSTEER DIITP H. + (.XBO LDD L' I 'XBI LDD L') I
f 'ltÀ SEL Sg H'

D INPUT:

D FLIP-I'LOP (RISING edge of 'B CLK L')

.STEER VA H. + .FORCE VA HI +
('ENA trlSRC ADD H' & 'IÀTCHED ÈrSRC 0 H')
T8 CLK L.)
I.Í.ÀTCH ËÀ H. - JX FLTP-FLOP (FALLING CdgC Of

J Input

IUTRÀP H' +

['ENA ]rSRC ADD L' t

('nA SEL Sl H' + 'PREFETCH Hr) t
('llÀ SEL SC H' + 'PREFETCH H') e
279

(.INVAL CHECI( L. + .ITIVAL IRITE H., 5
('ADD REG EXA H' + 'ClC tf, PROG L', I f
[('PÀ BUS REQ H'l'PREFETCH L') +'nEtr REC H'l

K Input:
('UTRAP L' t 'DEST PC H' t
rlt CLK EIIABLE
H' 5 'LATCIIED UTR P H'l +
('UTRÀP L' & 'IÀTCHED UTRAP L') t
[(ri CLtr EIiIABLE H' ó 'PREFETCH L'l +
(.PREFETCH CYC H. I .ADD REG EITIA H.) I +
('I.ÀTTCHED UTRAP H' 5 'PHASE I H') r
('BffES REQ H' + 'PÀ 8us REQ H'
'BUs CIC DEC H' + 'ENA iSRC ADD H')
ïlre flop is CLEARED vhen ';NIT H' is TRUE.
D FLIP-FLOP (RISIIIG edge of 'B CLI(
f 'IATCH lrÀ DEL H'
L') D TNPUT:

. T.ITCH I{A H'

f'Tlll ACV STÀLL H' - Jl( FLIP-FLOP (RISING edge of 'B CLK
L'} J TNPUT:
.PHÀSE I L' T 'ENÀBLE ACV STÀLL H'
K INPUT:
'PltÀsE I H'
T.ENABLE ACV STÀLL H. is TRUE if:
TPHASE I L. T .PREFETCH L. I .ADD REG ENÀ H. &
.IÀTCH }IÀ DEL H' E 'TIIi ÀCV STALL L' T 'EUS CYC DEC
H.

I'I.ATCHED XB STÀLL H' is the HIGH TRUE output of
FLIP-FLOP vhich is set by:

àn RS

.PREFETCH H. & .PREFETCH INH L. !
.FILL XB REQ
L' E 'XB REQ HT T 'B CLK H'

and reset by:
'PREFETCH INH H' + 'PREFETCH L' + 'FILL XB REe H.
r.XB
STÀLL H. is TRUE Tf:
.PREFETCH INH L. t IFILL XB REQ L. r .XB REQ H.

pDEIÀY STÀLL H. is TRUE if :
.DEHY H' & 'PHÀSE I L'

280

BUS CfC SIÀLL H' ls IRUE lf:

I ('E,lrs crc DEc lt'r .EIA rsnc ÀDD L. 3 .pnAsE I H.t Í
('IíÀ SEL Sl L' + .trÀ SEL Se t' + 'pREFEtcÍ H.D +
l('8US CïC DEC f,. r .PFÀSE I t.t .
('ADD REG EIÀ L'+ 'PREFETCH l'+'llTC$
rÀ DEL L',1

PÀ BUS Ptrl STÀLL ll'

lE TnuE lf:

('PÀ BUS REQ ll' a 'ENÀ islc ADD l. | .PlrÀsD I l|., r
('rÀ SEL Sl l. + .Ií,À SEL Se L. + .PREFE?CH rt. +
'IIVÀL CBECI( l|' + 'STÀTUS VÀL n'+'CIC IN Pi(rc B')

.rpÀ BUS Ell2 SIÀLL n' l5 Íf,UE lf3
(.PÀ 8US REQ HT 6 .PHÀSE I L.' T
('IXVAL CIIECX ll'a 'lÀtcll iÀ DEL L.t

isRc STÀLL H' lr lRuE Íf:
Í('XarUX SEL Sl L' E 'PBÀSE I l|.,

(souRcE: TB DÀïÀ + l|À + FC + pC SÀVE + VÀ(ISRC

lbcodrlll +
Í'PIÀSE I H' ó 'REÀD CIC ll' a SOURCE }JDR (ÍíSRC
Ibcod.ll
r'im STÀLL l|' is IRUE Íf!
'L()AD tm L' a 'llDR LDD L' a SOURCE l|DR (trSRC tÈcode)
..TEII CTC STÀLL II. 13 TRUE If:
i
I.REÀD ClC t. a .plrÀsE I L. r
('DEST tDR l|' + 'DEST rDn l'll +
Í(.DESI íA r. T.PHASE I t.l r
í'iÀ 6EL Sl l' + 'iÀ sEL sa L' +
'ClC lI DROG ||' t'READ L' a 'ÀDl, REG ENA L']l
.'IIIT À l' l3 th. ltlcB lnUE ouÈput of .n RS FLIP-FLOP
ràlch lr aêt by:
. rrtt ||.
and raaat by!

.stÀ?us valtD L'

Ím

llEFE Cll I 13 mUE I f :

(.nl

LDD

lr' a 'rl3 LDD B'' +
281

[(soURcE! ,rA + Fc + Fc sÀvE + vA + TB DAT^ +

ta + ím(isRc Decodest ) ó TPHASE I Í' r
ST^LL L' r 'lliCHED rB S?ALL L' i 'iSRC XB L'f
'x8
(.stAtus VAL H'+'PREFEïclt DEL L'tl +
('CYC ltl PROG Hi s 'PREIËtCll CIC L') .
Í(.8us REe H' r 'x8 STALL L' f 'LÀtcHED xB sÍ LL L')
ó (TST TUS YÀL l|' + 'PRefETCt| DEL L'll +
('otFÀP ll' Í 'PREFEICh L')
..UO PREFETCI| À Í. is TRUE iÍ:
('CYC IN PROC L' a 'rxVÀL CHECX H. f 'IIVAL rRItE L't
+ (.CyC tN PROG Lr e .PHÀSE I L. ó
'Pc CLK REo H' t 'LA''CH IiÀ L'l +
(.EnES REC L. r .tÀTClrÉD UTRAP í. a .pREtE?Cit DEL
L.) +
Í'SIATUS vAL H' r (.uTRÀP ll' + -PREFETCH REQ L''l +
(.pREFEiCB CyC H. i .^DD ENÀ DEL L. a
.stÀTUS vÀL H. r, .REÀD lt.l .
.tNtT À lt.
.'PREPEICH n'

ls TRUE tf:
.IIO PREFETCII L. T .NO PREFETCH A L.

CNrp Ot fEtlts

.rr cLK EIÀALE $. r .pC ENÀBLE H.

>>> .ENA V SÀVD L. is TRUE (LOt] fÍ:
.P8ASE I B. + .DEST pC l|.
. EIÀALE ÀCV STALI H'

>>)

r lÀTclt lt^ L. lE TRUE (Lff)

. !,ATCI lrÀ lr.
. ]rt sEL

sl ||.
282

lf .

INA SEL SI T'

'nUI SEL Sl ll' ls TRUE (lttcHt I f :
'nUX Sl Ë' + ('PHASE I L't rPA BUS REe lt.l
'PREDEICII L' lr lnUE (LOt tf :
' PREPSïICI lt.
'STALL L' tr TRUE (L(!t

tf :

.ts30 lrlt L. t
['DllAl STALL ll' + 'BlrS ClC STALL ll! +'I8 STALL ll'
'PA lUS Plt STALL h' + 'PA 8US Pll2 STALL ll' +
'ISRC SIÀLL ll' + 'im STALL H' + 'lDl CIC STALL H'l
'I8 SELECT [r tc IRUE (Hlcll) lt:
.IE S8L tr'
'Ill lI lrSE L' lr tnUE (L(I1 lf :
.RESE? TBI LDD L'

T ('BTTES REO I II' + 'BITES REQ E

[.) 3 ('BO?[ FS REQ l|r + 'XB SEL Lrl
'IB, II USE L' lr IRUE (LÍX1 lf :

.RESEI P' LDD L' 3 ('BTTES NEQ lH'+
B.) 3 ('BOIU XBS R8Q ll' + 'XB SEL H')

283

'BrrEs REQ 0

t^t\clrED islrc I ll --->trl
sr^plsHoT GI L ---> le2

aEt<--- I.IIICHED TSRC ? ll
a7 I <--- r.rTcHED rsRc 3 H

---> rA SELECT SI II
{5t<--- t TrcHED iSRC 0 ll
ll t <--- ttt\cnED rsRc { H
EXAELE ACY StAT L II <--- | 06
f3t---> TA SELECT SC II
rseQ trtt L --->tg?
RDI II
€2 t <--SÍALL L <---le8
al t <--- lstzEcL
l.Alcl| rA L <--- r t9
tc t <--- LD OSR L
PREDETCI L <---t l0
39t<--- ISIZEIL
EXA YA SAVt L <---tll
3E r ---- GROUXD
YGA ----tl2
. LID . 3l t <--- IBPCI'H
BCLKL --->t03

a6 t

Pt|AsE I ll ---> t ta
riux sEL sl ll <---t05

a..aaaa

vtc ----rl3 . D(IX. 36t<--- DST RiODE H

UTRAP L --->tll
r CLX DXABLE II --->tl5
D CLÍ ETABLE II --->ll6

35 t

aa
oaaaaaa

trTcnED Errs 3 ll --->tl7
STAII'S VALID L ---) t l8

--->tlg

TATCIIED TC?RL I II
TEI TX USE L <--- t 2,
IEE II USE L <---t2t
TTTCIED ICTRT 3 II ---> t 22
XB SELECT H <---t23
EXA PC L <---t2a

---- GROUID

3at<--- t.AllcnED Bus c H
33 t <--- t TcnED BUS I ll
32t<--- PSt Cf, tl
3l t <--- trÍcnED Bus 2 H
3tt<--- xB FC tl ll
29 t <--- BUS'H

2t t <--- LATCHED TCTRL TH
27 t <--- ITNCIED TCTRL 2ll
26t<--- HïICIIED ICTNL 5H

25t<--- I.ITICBED HCTRL all

PNT FIGURE I

PIX COIFIGURAIIOX DIAGRAi AND PtX IDEX?IFTCATIOX

2er

t.22

3llvtc3 trD rlltrntttc Grrrot (8rc-r6r?l

CnfL rcltttCr
thlr.p.clÍlcetlon
deÍlncr thc dctrll rcqulrc.Gntr Íc't
thrre .r.aa oÍ Èh. proccr.or. ttrcy .Íc thc Syrtcr
Clocl, Etrvlcc Arbttr.tlonr end Èhc IRD eourtGr.
src rrfLB I
?ln tdrntlÍlc.tlon rtÉ Grte ttD.

Plr I
I
t
I
2

5
6
7

t
9
It
tt
ll

l5
l6
l7
rt
l9
20

2l
22
2t
2a

GATE

PII TD

COITEX?S TTPE PII I

GOr nAtt t

G trrFzs

osc Ë
cr.!: DtY3 L
SE' PtrTSE II
TtN ETATL H
SDT CI,t I
BASE Ct'oct tl
iICRO ADN IXH t

GAITI?26
GAt?Pf27

PEt Ci Ë

GAIrI?3a

CS PARI?T ERROR II

f,ALT t
TICFO iRAP L

tRDemtË

EUIIB
EUT2[
BU?ti
lut corlRol, coDE ll

rctrt

cAt"tr28

cAtril?29

GA I

GArtrFSt
"il3f

GAIIP?32

cAltrF33

Grltttto
crtril39
cA ltmtt

cAttrFST

GrltlFt t

GAltr?{2

GÀITNFI 3

GAl"rFaa

r8t0 trrT L

GÀITIFIT

tRD ern a
tRD Ctn 2 l|

trstR ?Clrcll tr

cÀlrfia 5

cÀt"tra6

GAtrtrae

2t5

PII ID

CilEI?S

GTTE
TTPE

cLr c?RL I rl
GAITPF
clr ctnL , H
GAITPF
GAlrrï
D CLT EIAELE II
i CI,r EITALE B 131:i$ GAI?IT
G ltxF
GEX DES? IIB L
IATCX UTRAP L
OD CLT EIAITE

GAIrIT

MIDLE ETAITE ll
ETABLE UYEC? II
DO SRUE t
LD OSR L

PSL TP T
IIT PEXD L

cs ÀDm 02 L
CS ADN t' L
CS ADDR

L
TIIER SENVICE
'I
FPÀ TAII L
FPÀ STALT L

ÀRITH TRAP t
FP TRAP L
CLTX H

GAIÍtr

GAITTD

Gàlrtr

GATITD
GATTIF
GA TtXF
GÀ

ITïF

GÀITCX

GAltrch

,iii:iii cAttïr

G| ITCX
GAITf,D
GATIPD
GAI?XF
GTITPF
GAITf,D

2.
2.1

2.1. I

2.t.2

2.1.3

trrtonelrl
3C.c.3tenÈrr
s

nrls lr . D type f I lp f lop vhlch ir
eglll?
{!?r
Írlltng rdgo of -glse cucr H end ls ret
ffio
lÍ CIII f, lt rrcrtcd, thc PUASE tlÍpÍlop ls golng to bc
..t , rnd fS?Q IIlt t lr not .tscrtCrd. thts Ílop lr
clocled to r.ro.. tong rr iSEQ tXI? L tr lrlcrted.
Ejf
lllt
lz ttlr lr r D typc Íltp f lop vhlch lt
rtrtng rdgc ot I ctr L end lr aGÈ tÍ
ffi
!t/l COIïROL COD? X Ír rrtortd, BUI <2:f) . 3' the UttAP
Íl tp Ílop lr clcrr, lrÉ fSEg lllt L I r noÈ .rrartcd.
I|lo floP lr cloctcd to tGro vhcn iSEQ lxlt L ls
trtorted.
Cf tfDl ?Ll? ?l!?: ïttlt lt . D typc fltp flop rhlct ls

ffilltng
IC

cdgc oÍ BASE CLGI U.

lt ll sct

PSL Cf f, lr rrrertod,
lut
COI?RIOI CODE H lr rrrcrtcd
elÉ
IIJT
<2:t> . I or 5,
.ÍÉ
the PBASE ÍltPftoP lr clcered,
erÉ
PtrÀSE lr 9otn9 to be reÈ,
.nd
iSEO IIIT t lr not .t;.rÈ.d.
rrÉ
Othc'll 3c It lr clcrred.
1, m fE ?Ll? ?t0?r ï|tll lr . D tyPc flip floP trttich
2. t.a
trlltng cdgc of BASE cLOCf H. ïtrc
lnput to thc tlop lr LD OSR L. ltttt lg, tt ls sat rhen
LD OEn L lr not .38.rtcd rnd vlcc Yara.. iSEQ lxIT L
dlrrct r.tt thc fltp Ílop.
Otfft ?tI? ?tO?r lltts lr . D tyPc f lfp flop vhlch is
2. l.t
frlltng cdgc of BASE cu)cx tl. It ls
ffir
L tr.t.orÈ.d lrÉ iSEQ IXIT L ls not
ÍnÀP
ttCRO
tt
fot
lt lr elccacd. lt|e flip flop ls
otherrlrc
r33OrÈGd.
iICRO
rlron
TRAP L lr not .tacrtad.
dlrect clerred
|||fl? IF ?Lt? ?l!?r Ítrlr ll . D Èypo Íltp flop uttlch
2.1.6
talllng edgc of BÀSE CtOCr H. It ls
ffi
lot tf tlcRo TR^P L lr rrrcrtcd, thc U?RAP flip flop is
lt ls
retr rrÉ iSEQ IXIT t lr not tateltcd. Othcrrisc
ylrcn
iICRO
p
clcrrod. ttr. tl f f lop ls d I rcet clcered
TR P L tl not .tacrtcd.
[lAl CtI ClfL fEtSilfr Thls is a 2 blt register bullt
2. l.?
s.
Tlrey orG eloekcd rt th the
frlltng cdgc of BÀSE CLOCi ll. ïhc lnput deta to the
rqttrtcr tr CLf, CTRL (l:0> ll. EoÈh blts of the rcgtster
rrr dlrcct lct bY iSEQ INIT L.

286

tltls is . J-t Íl ip tlop vttich i3
edgc oÍ r cL'- L. tf rsEQ rrtt L
ffilrin9
tr .33crtcrd thc fllp Ílop is clctred rcgrrdless ct it3
Ítcn thc flop il clcrrcd, Ít c.n bG aet Íf CS
ltrtc.
FARlff EnROn I lr rrserted rnd iSEQ !rI? L ir írot
Ítcn thc Ílop is sct , it c.n bc clerred Í Í
.lrcrtc{.
Blrt C(ftnOL CODD X ir.s3aÍtG.d and tUT <2=2) 3 a oÍ 5.
or tt iSEO IIlt L ls;esscrtcdtlrir is I D typc flip floP vhich is
Il tlF ?Ct" llC:
cdgc of I eLf, L. Srcn rsEQ lrlï
ffitrtng
L tr .33crtcd thc tlfp flop is cloctcd to Zcro for .3
ltrc f lrp Ílop ls sct rllcn
tong .t rStO lIlT ir vrlld.
tlstn FgnCË f, lr .s3crtC{ rnd iSEQ IrIf L i s not
asaartc{.
lttis is . 2 bit cor!!tcr built
rr8tG GtGf rGlSlll:
cloctcd rith thc
ot's.
ttrcy.rc
tfrc couÍrt scqucncc is a3
frll trq cdgc oÍ OSC Ë.
[.ollors:

2. l.t

CS n

2.1.t

2. l. It

BAS tC

?31? ?lC:

Ctffr

BASTC CLOCI <r>
0

I
t
0....
a
Ilrcn CLR DIY3 L ls rsscrtcd thc rcgistcr is clocted to .
taro Ytluc.
CU Efftl ?Ll? ?10: Íttis is I D ttPC tl ip tlop rhlch
2.l.ll
,l

rising cdgc of OSC f,. It ls sct it
ttrc flip tloP is dircct sct ulrcn

BtStC CI'OCR <l:f) r t.
CLn DIY3 L lr .r3crtcd.
2. l. l2

llris ls . J-f, tl ip tlop uirich lr t
ETFEft-lt'IÍ-Ehc frlling cdgc ot BàsE CLGI Ë. BÀsE
clcr n chtngcs the at.tc of FlrAsE tt BÀLt L is not
rsscrtcd end lntcrnrl SIOP R ls not .s3crtcd (sac P.r..
PllÀSE ls dircct cleercd ràcn CLn DlY3 ll ls
2.2.61 .
DlfS3 ?LlD ?t!?:

tsscrÈcd.

2.2

2.2. I

2.2.2

Slgml Drcrlptlonr: Ccrt.in input pins .ra dctincd .3
Ttrese .rc f ced throqh lrtchct
hav ing 'Slcr btches' .
th.t erc op(!n lhen the clocl is not .sscrtcd tnd closcd
uàcn Èhc cloct ls csscrtd.
Ttris slgnel is the basic oscillator utrich is
OSC l:
Eil-to gcnar.ce tha Syster Clocts.
sDt cl.I N: ttris is the ouÈpur oÍ thc B slc ct-ocl <l>
fl ip ftop.

2t?

2.2.3

Tltls clock signal is used Èo clock a
nrrber of state eleaenÈs and sker latches.
2.2.a
Gttr DlY3 L: Tlre stgnal ls used only for chip testing
FurPosF It ts useá to clear the BASIC CLOCK REGISTER,
PllASE, and rsaoclated ci rculÈry.
2.2.5
Slt PIISE l:
Itrts sÍgnal is the logical OR of th,o
SEIEIESEFTf tp flops. - tf etrher f ltp itop ls ser, sET
PIIASE H ls asserted.
Ttre PSET fllp flop indicates vhen the PHÀSE ffip flop is
golng to be set. PSET is set if:
BASE CLOCK H is not asserÈed
and
CLR DIV3 L is not asgerted
and
the PCLR fllp flop (described below) is set.
The flip flop Ís cleared uhen:
BASE CLOCI H is asserted
CLR DIV3 i is asserÈed
or
'
the PCLR fl tp flop is cleared and the present staÈe of
or
PSET ls cleared.
ttre PCLR flip flop indlcates uhen the PHÀSE fllp flop is going Èo
be cleared. PCLR ls seÈ lf:
rhe PHÀSE fltp flop ls cleared
InÈernal STOP lf ls not asserÈed (see Para. 3.3.2.6)
and
and
HALT L ls not asserted
BASE CLOCK H ls asserted or the PSET flip flop is set
and
CLR DtV3 L ls not asserÈed
and
BASE CLoGI E:

'r r.

the PHÀSE fl Íp flop ls set
lnternal SIOP i| ls assertcd or HALT L is asserted
CLR DM L ls not asserted
EASE CLOCK H ls assertcd or the PSET fllp flop is set.

and
and
and
ttrc ff tp flop le clcared rhen:
CtR DIV3 L te aescrtcd
thc PSET fltp flop la cleared and BÀSE CLOCK H ls not
or
a$crted and thc prcccnÈ sÈrtc of PCLR ts cleared
the PnÀ6E fllp flop ls clearcd and (InÈernal STOP Íí is
or
raacrted or HALT L ls asacrtcdl.
thc PBASE flÍp flop le sct and Internal STOP ll ls not
or
'
arocrtcd end IIALT L la not asscrted.

288

2.2.6

2.2.?

I CIJ Elll.t E: Thts stqnal is the logical OR of tuo
flops. rf elther flip flop is set, i cLK
@
EI|ABLE ll lr asscrted.
tte lll fltp flop ls set lf :
thc CLt( EllÀBLE fltp flop is set
and
the FCLR flip flop (see Para. 2.2.5, is cleared
and
the PllÀSE tlip flop is ser
ltrc t.tip flop ls cleared uhen:
thc CLI EXABLE fltp flop ls cleared
or
thc FCLR flÍp flop ls set
or
thc PFASE fltp flop ls cleared and the present sÈate of
is clcared.
lll
The lr2 tllp flop ls sct if :
Internal STOP n ls not asserted (See SÀC Table 2l
HÀLT L ls not tBscrtad
and
the PHASE fllp flop ts set
and
thc CLX ENÀ8LE fllp flop is cleared.
anj
Íhe fltp flop ls clcared vhen:
Internal STIOP i ls asserted
tlÀLT L is asacrted
or
the PtlÀSE fltP floP ts eleared
or
the CLf EIABLE fllp flop is set and the present staÈe of
or
A2 l; clcarcd.
D CtI OÀlLl l: ttrls signal ls the logical OR of tvo SET-RESET
elther fllp flop is set, D cLK ENABLE H is
@t
asserted.

Ttre Dl tliP f IoP ls set lf :

rhe cLK Er|ÀBLE fltp flop is set
the FCtR fltp flop (see Para. 2.2.51 ls cleared
and
the PHASE fftp flop ls set and Internal STOP D is not
and
assertcd (See SAC Table 3).
Ttre f llP floP ls cleared Yhen:
the CLK EI{ÀBLE fltp floP is cleared
the FCLR fliP floP is set
or
the present st.te of Dl is cleared and (the PHÀSE flip
or
flop ls cleared OR Internal STOP D is asserted).
Tne D2 fllP floP ls aet if:
289

Intcrnal STOP lf is not assertcd
and
Internal STOP D is not asserÈed
and
the PHASE flip flop ls set
and
HÀLT L ls not asserted
and
the CLK ENABLE flip flop is cleared.
The ff ip flop is cleared uhen:
Internal STOP ll ls asserÈed
Internal STOP D Ís asserted
or
the PHASE flip flop is cleared
or
HÀLT L is asserted
or
or
the CLK ENABLE flip flop is set and the Present staÈe of
D2 ls cleared.
2.2.8
QD Ct.f, nÀ8LB E: Ttris signal is. asserÈed as follows:
INTERNAL INTERNÀL PHASE
QD CLI(
STOP }T
FLIP FLOP ENABLE H
STOP D
HALT L
DOUBLE ENÀBLE H
L
xx
LX
x
H
HX
xx
H
H
H NOT ÀSSERTED NOT ASSERTED SET
L
OIHEH I SE

SÀC TAALE 2

UTRÀP

tD OSR

rsBQ l|En PPA FPA CLIX lRDl TICRO EU? LD Dl:F PnASE
INIT STÀLt TÀIT STALL FLIP FLIP TRÀP FLIP OSR FLIP FLIP INTERXÀL
FL(IP ?LOP. S$OP i
?lI)P L
?tPP ?IOP L
L
L
tr
L

X
X
X
X
X
X
L
HttxxxxxxxxxASSERTED
HXXXSETXXXXXXÀSSERTED
BXXXXSETXXXXXASSERTED
L
X
X
X
X
H X
HxxxxxxxHCLEÀRSETASSERTED
HXLLXXXXXXXASSERTED
oTHEmtSE

NOTÀSSERTED

CLEÀRX X

ASSERTED

NOT ASSERTED

SAC TABLN 3

ctr

DE6? IIE L

L
X
X
H

iAEQ IXI' L

RB lln ?LIP ?LOP II?FRIAL StrOP D

X
X
L
H

X
L
X
H

290

ASSERTED
ASSERTED
ASSERTED
NOTASSERTED

2.2.9

ttt 6?ÀLr. H: Tttis signal is used to generaÈ€:
II CLK ENÀBLE H
D CLX ENABLE H

QD CtT ENABLE H
SET PHASE H
HÀLT L

2.2.1O

L: Ttris signal in conjunction sith FPÀ STALL L
is used to forn:
iI CLK ENAELE H
FPA ïAIt

D CLK ENÀ8LE II
QD CLK ENÀBLE tl
SET PHASE H
HÀLT L

2.2.1L

FPÀ, SIALL L:

ltris signal cones f rom the FPÀ. For its

use see Para. 2-2.1e.

Ttre pullup for this Open Collector signal is included

2.2.L2

here such that it wtll be unasserted if nothing is
connected externally.
CIII E: Ttrls signal specifies that the Processor should
FErI-fo r onc bu8 cyclê uhllc thc P[AsÊ fllPfloP ts 5êt.
tt ts uscd as the dlroct input to t5e cLl(r( flip flop
which is included in the generation of:
}I CLK ENABTE H
D CLK ENABLE H
QD CLK ENÀBLE H
SET PHÀSE H
HÀLT L

2.2.13

GBI DES! IIE L:

Ttris signal is used to creates

D CLK ENÀBLE H
QD CLK ENÀBLE H
DOUBLE IIADLB E:

Ttris signal is used to generate QD CLK

2.2.11

ffi

2.2.15

Ttris signal is used to inhibÍt all systgn
ETóE'IE for debugging. It is generated by a J-K flip
flop whlch changes on the falling edge of BASE CLOCK H.
Tfre Elop ts dlrect cleared by IISEQ INIT L. The setting
and clearlng of the HALT flop is controlled by CLK CTRL
(l:0) H and the DELAÏ CLK CTRL register. HALT is also
set if tuo CS PARITY ERRORS occur and the second occurs
before the nicro-code has the chance to save informaÈion
abouÈ the flrst one.
tlAl.t L:

29t

The eneoding of the CLK CTRL signals is as fellous:
CLK CTRL (l:0)

FUIrC?ION

RUN

S I NGLE IIICRO-INSTRUCTION

r|ALT

SINGLE TICI(

The legal trànsitions of functions are3
RUN

}IAtT
HÀLT --> Single Tick
HALT

See SÀC Table 4.

2.2.16

2.2.11
2.2.18

2.2.19

Clf CÍRL (l:f) E: The pullups for these open Collector
uded here such that they ui I I be
fficl
asserteC if nothing is connected externally. Tftey are
receivec/ thror.rgh skeu latches clocked uith BÀSE CLOCX H
and it is the latched versions that are actually used
See Para . 2.2. l5 for
throughout this specification.
functional descript ion.
m SRVC L! liis signal lndicàtes thàt à sêrvicè request
is fiii-senÈ and control should be Èransferred to the
appropriate roucine. DO SRlrc L is generated as follous.
(See SAC Table 5).
CS ÀDIDR (2:t) L:
These are the address lines usej to
accesFEÏie--tffi-trol Store ROt{s. If DO SR\rc L is .ralid
then these signals specify the address of the service
routine. (See SÀC Table 6).
ARIIU IRAP L: Tttis signal is used Èo form DO SRVC L, CS

EDDffifr;-fr0 ENABLE uvEcr H.

?92

SAC

cLr
CTRL
(l: O)
H

x
x
x
x
3

'A8LE '

cs cs

DETAT
CLK

CTRL PEÀSE

(l:0) B'

sfoP n

xx
XL

UNASSERTED

ASSERTED

H
H

XH
XH

xx
gx
ox
o.L)z x

HALT

CLEAR X

SET H
SET H
SET H

UNASSERTED
UNASSERTED

BASE

CLEAR

OR CLEAR
OR CLEAR
OR CLEÀR
OR CLEAR
OR CLEAR
OR CLEAR

L
L
L
L
L
L

x
x
x

XL
XL

cLocf,

FLOP

iSEQ HALT
TNIT FLIP
L
FLOP

PARITY ERROR
ERROR FLIP

IXTERXÀL

XH
SET
H
H
H
H
H
H

OTHERI{ ISE

H
H

SET -> CLEÀR
SET -> CLEAR

cs
PARITï

ARITH

FLOP

ERROR
B

TRÀP
L

CLEAR

x
x

SET
SET
SET
SET
SET
SET

L
L
L

sRvc

x
x
x
x

FP
TRÀP
L

TIIIER

x
x
x

SERYICE
H

CON INT
HALT PEND
LL

x.'

x
x
x
x

x
x
x
x
x

x
x
x

x
x

L->H

CLEAR
CLEAR
CLEAR

H->L

NO CHÀNGE

NO CHANGE

PSL
TP

x
x

sRvc

H
H

L
L
L

L
L
L
H

OTHERI{ I SE

293

SET

x
x
x
x
x
x
x

x
x
x

lt->L

SÀC TABLE 5

8UT

H->

SAC TAALB
CE

TICRO

PANITï

ADDR

ÀRITB

?IIER

cox

IXT

INROR

TIH
L

?RAP

IRAP
L

SENYICE

BAL?
L

PEX

CLEAR

x
x

ïSET

x
x
x

L
L
L
L
L
L

H
H

x
x
x
x

x
x
x
x
x

H
H

L
L
L

tut
SRVrC

?toP

SET
SET
SE?
SET
SET

PSL CS
?P ADDR
<2:l)
I

x
x
x
x
x
x
x

x
x
x
x
x
x
x
x

x
x
x
x
x
x

0
o
g

I
2
4

6
0
5

2.2.20

FP TRAP L: This signal is used Èo forn DO SRlrc L, CS
IDDDRZID and ENÀBLE UvEcT H. The pullup for this open
Collector signal is included here such that it will noÈ
be asserted if nothlng is connected exÈerna^ly.

2.2.2r

?Iftn

ffio

SBRVICB E:

Tttis signal is used to form DO SRVq t-,

ENABLE uvEcr H.

2.2.22

COI EÀLl L: Tttis signal is used to form DO SR\rc L. CS
ADDR<2zO) And ENÀBLE UVECT H.

2.2.23

III PttD L:

2.2.21
2.2.25

Tttis signal is used to form DO SR\rc L. CS

ÀDDR<2zO) ANd ENÀBLE UVECT H.
',

E: Tttis signal is used Èo form DO SRlrc L, CS
FDDfl?: Í> and ENÀB LE UvEcT H.
Ttr is signal is used to enable the
EIABLT WECI E:
onÈo the CS ADDR lines.
nicro-vector
ffice
follous:
as
generated
It Ís
PSL lP

294

PrnsE isEQ Do u?RAP ARttH Fp ?IiER COX rXT pSL EXAELE
?LTP IXIT SRUC FLIP TRAP TRAP SERYTCE HALT PETD TP UYECT ;
FLOPLLFLOPLLIILLHH
i
CIEARXXXXXXXXXT
xLxxxxxxxxt.
SETHHCLEARXXXXXXL
sETlrlrsETxxxxxxH
SETHLXTXXXXXL
SETHLXHLXXXXL
SEIHLXHHHXXXL
SETHLXHHLLXXL
SETHLXHHLHLXH
SETHLXHHLHHHL
L
Othcrvtse
TtrÍs signal indlcates th.t àn IRDI
lfgln ?S!Cl E:
2.2.26
ffih-T-as-5-een attelpted. IllsTR t'ETcH H is generated
as follovs:
INSTR
GEN DEST
BUT COXTROL 8UT (2:E)
FETCHH
INHL
H
CODEH
LXXL
L
O111213.6.7 X
H
H4,.5HH
L
L
lr5
n
L
OTHEilISE
2.2.27 t CS PAnI?l BIIOB B: Ttris signal is used to generate HÀLT
Do sRlrc L. and cs ÀDDR <2:o) L2.2.2C tICnO ltÀP L: Tfrls signal ls used to generate
EIIABLE UVECT H
I]ISTR FETCH H

IRD CtR<2ze) H

2.2.29

2.2.3a

lJ|tct UttA? L: Ttrts ls e latched version of IIICRO TRÀP
-L.
ttre slgnal ls tsserted if :
the PHASE ÍftP floP is set
and the UTRAP fliP floP is set.
iICIO tDDn lfl. L: This slgnal can be asserted by
tts purpose is to disable the
varffievices.
The pullup for Èhis signal is included
CS ADDR lines.
here such that tt utll not be asserted if nothing is
connectcd externally.

295

t CLI L:
Thls ls the cloct associated vith the
-IEffiqucnc.r.
ïte rÍsing cdge of lr cLr is used to
clock thc:
CS ERROR fltp ftop
RET IxH fltp flop
Bu? SRI/C fltp flop
and
the IRD CTR.
.
fS!0 III" L: ttris is an initialtzation signal uhich is
2.2.32
useil-E--jÉÏlcar .ost of tl,e st.tc ln this cÉip. Hhen it
ls asscrted, lt
dlrect aeta the LD OSR BUF fl tp flop
forccs CLfiX flop to bc clocked to ZERO
D Ctf EXABLE H ts unasscrteo
QD CLX ENABTE H ls unasscrted
forces REt INH flip flop to be clockcd to ZERO
direct clears the HÀLT flip flop
HALT L ts not aascrted
Prevlous CLX CTRL (l:0) ll are forced to Èhe RUN funcÈlon
forces the BUT SRVC fl ip flop to be clocked to ZERO
direct clears the IRD CTR.
forces the Crr IRDI flip flop, the UTRAP BUF flip flop, the
UTRÀP 8UF fltp flop, and the CS ERROR flip flop to be
clocked to ZERO
t?tls ls a 3 bit counter vhich keeps
tnD Cll <2:1) lr
2.2.33
of t aàcro-instruction.
It is
ffiperands
dlrect cleared by iSEQ ltflT L. làe rlslng edge of tr CLK
L clocks the counÈet vhlch Ís a D tyPe registeÍ. The
countêr changes as follous (See ..lC Table 61.
2.2.31

2.2.34

DUt GiltnOL GODB Ëc

ffiseo

Ttris signal lndlcates that BUT
to generàte

D CLK ENABLU H
QD CLI( E]IABLE H

DO SRVC L
CS ÀDDR (2:0)
INSTR FETCH H

and to conÈrol the
8UT SRvc flop
and the tRD CTR.

2.2.33

RET INH flop

It ls received through a skeu latch clocked ri th ll CLK L
and it ls the latched version vhich is used throughout
thts speclfication.
Blft <2:f> !: Ttese signals cone fron the Control Store
recelved Èhrough skev latches élocked wlth tl CLK L and
lÈ ls the latched versions ubich are actually used
throughouÈ thls sPecif icaÈion.
296

2.2.36

ltis signal indicates that the raehine is
running Ccpatibility iode Instructions. It !s used to
PSL Cf l:

geneÍate:

IRD Cfn <2:e) H

and the

2.2.37

crr IRDI f I ip f lop.

LD OSR L: Ttris signal is used to generàte IRD C13 <2:0)
H and n CLÍ EXABLE H. It is received througn a skeu
latch clocked uith BASE cl.ocr H and it is the latchcd
version vhich is used throughout this sPGcification.

297

SAC ?AELE ?

LD PEL corT. lu?
osR Cf,
CODB <2:f)
it
LE
x
x
x
L
L
L

ll
ll

x
x
x
x
x
x
x
L
H

xx
xx
LX
lf
H7
LX
H
HI

rSxt

PRIEEIT

tt?

,lr 5

e-3,6

e-3t6.7

OTHEFIISE

YALUB

IRD
GTR
NBG.

x
x
x
x
x
x
x
x

erl

YALUg
DO
SRYG

UTRAP

IND

DLIP

?roP

c?n

CLEAR

SET
CLEAR
CLEÀR
CLEAR
CLEAR
CLEAR
CLEAR

H
H
H
H
H
H

nrrsttn
e
PRESETIT
PRESEI{T
PRESEXT
PRESEI{T
PRESEXT

VÀLUE
VALUE
VALUE
VALUE
VALUE
PRESET{T VALUE
PRESE}IT vÀtuE
FRESEr|T vÀtue
PRESEXT VALUE

IRD

ctR

<2: t)
Ë
.,

IRD CTR REG
IRD CTR REG
+I IRD CTR REG
+I IRD CTR REG
IRD CTR REG
IRD CTR REG
IRD ETR REG
+I IRD CTR REG
IRD CTR REG

coN HÀLT L --->tel

{8t<--- CLKI H
osc H --->tez
47!<--- FP TRAP L
46t<--- ARITH TRÀP L
CLR DIV3 L --->tO3
SET PHÀSE H <---tOI
{5t<-.- FPA STALL L
l|Et| STÀLL H --->tC5
l{r<--- FPÀ rArT L
{3t<--- TIiER SERVICE H
sET CLr( H <---to6
tl2r---> CS ÀDDR gl L
BASE CLOCK ll --->t07
4lt---> CS ÀDDR e0 L
rrcRo ÀDDR r]lH L --->te8
pARrTr
{et---> CS ÀDDR 02 L
ERROR $ --->te9
cs
39t<--- rli|T PE}{D L
PSL Clt B --->tle ...o...
.381----GROUND
HÀLTL<---tll.
I'GA ----tl2 . LrD . 37t<--- PSL TP H
vcc ----tt3 . DoíN. 361<--- LD OSR L
.
. 351---- GROUND
ilICRO TRÀP L --->tll
tRD CTR I H <---tl5 ....o.. 3{l---> DO SRVC t
BUT C H --->T16
33t---> ENABLE UVECT H
32I<--- DOUBLE ENABLE H
BUT 2 H --->tI?
BUI I H --->tl8
3lt---> QD CLf, ENÀBLE H
3e t---> LÀTCH UTRÀP L
BUT COI|TROL CODe H --->tl9
29I<--- GEN DEST INH L
T CLK L --->t2E
28t---> II CLK ENÀ8LE H
IRD CÍN O H <---t2I
271---> D CLK ENABLE H
IRD CTR 2 N <---122
26t<--- CLI( CTRL 0 H
lrsEQ IIIT L --->t23
25I<--- CLT CTRL I H
INSTR FETCH H <---t2I
SAC FTGURE I

PIN CONFIGURATION DIAGRNI ÀND PIN IDENTTFICÀTION

298

'l
Acnlrcn PAD ADDRESS Cf,Ip (EpÀ-E6l6l
3.2t
l. GlftnrL DS8cnrPtrox:

Itrc SPÀ chlp rcrvca tuo aain purposess
(A) l1o conÈrol the operatlon of tuo external arrays of
!craÈch Ptd, RAll-R and RÀlr-ti. This is done by
controlltng thelr Ecratch pad address and chip select
rlgnal s.
(Bl To provlde . rcchanlsa to undo the auÈo-lncrenenÈing and
Èhe auto-decreacnting of the general PurPose registers.

ttris ls done vta the reglster back-up stack (RBs).

299

EPA TrlLE I

Pln ldrnCltlcrtlon rrÉ Grte fyp.
tl

l?lrflrtrrD

I cmllTs

Itrtl
l2
l3

l5
l6
l7

l2r

426
127

l2t

129

3t
3t
32

36
137
139

l|sRc I tl

GAITXF

RSPA I

GAIflG
GÀITrc
GAITlG

GAITTG
GAITTil
GAITTG
GÀITIG
GAITTG
GAITTG

isPÀ 3 ll
RSRC 2 H

GATTl{F

lsÊnL

GÀ l1l|F
GA ITTII

I RCS lËP L
I RCS rPR L
RSRC O H
ttT I ll
RSRC 5 ll
RSRC I rl

GAITIIT
GAITNT
GA I TIIH

GAI?IU
GAIT||F
GÀITNF
GAITilF

DST RIODE H
RSRC 3 ll
LIIRL EX t
RSRC I f,

GAITTï

GAITTF

RCS GPR L

ltTrf

IXSTR DEÍCH H

GAITNF
GAITilG

D 6tZE I ll

lr3
lrr
lr5

rDrrs aa ll
IRD RTIN I H
mus 03 [
nus a2 a
IRD RXII 2 H
tRD rtxut 3 u

lrt

GÀIITF
GAITXF

RSPA 2 H
TDTP CS L
RSPA 3 H
TSPA O H
RSPA 3 H

SPASTA I II
SPAS?A g ll

a16
aa7

GAIIIIF

lr!
lrr

l12

G lrill'

rsRc 2 n

rsPA I tl
rsPA 2 tr

i
I
I

GAITXF

GAITXII

lr5
f16
lr7
frt
lr9
l2a
l2r
l2s

GAITXF

DP PIIASE H

rsRc I H
rsRc I H

422
423

lnrc
GÀlïrn

DSIZE'Ë
IRD LD RITN U
D CLI EIAALE H
rsRc 3 ll
TCLIL

It,

lrr
lrr

Í--

I GrrE rlP3 |

G lrril

GAITTX
GÀITZG
GAITZG
GàITTF

nus tl H

GAIIZG
GATTZG
GATTNF

GÀIINF

3e,

I
I

Prrfonrncc

2.1

Iotatlonr:

Itrless othcrulee sp.ctftcd, the notatlons used in this
docrlcnt .rc as follors:
(À) all nrrbers lre ln declral;
(81 rlgnal
values .re
ln
voltage
level:
H . Hlgh

Lrlov
I . Donrt care (Hign or loy)
Grnrrrl Infonrtton: T|tc rcratch prd RAT chlps Èo be
conÈrolled by the SPA chtp rre 16 vord byr blt RAls.

4.2

Rlt-t:
RÀl-ll contalns 16 locations used for rlcrocode
te.porarlcs. Drta fror RÀlt-il are output to the l|Bus of
thc CPU data prth.
The rcraÈch pad location ls
sPcctfled by the ISRC fteld of the rlcrorcrd. The
aaslgÍrcnt and aolc ugcful not.tions for the iSRC f ield
are deflncd in SPÀ Tablc 2.

2.2.1

8PA tttt.l

T6RC ?IELD ASSIGNEII
iSRC (hcr l
Artgr:rnt
Drnotrd by
aatata aaaaaaaa tataaaaa aaa aaaaa atiaaaaaaatt a aa

eo-oÊ

l5
t6
l7
l8
l9
lÀ
l8
lc

ID
TE

tttPr 0-r 5

rilPÍRXrrl
rlrP Inxrl+r I
Rcservcd
Rarerved

||trP
TITP

rlrP

Rceerved
Rcccrved
PUSH-

PUSH- .
PUSH+

PUSB+

rBUS<-RXtn

Rlrcrvcd

Rcecrvcd
Rcccrvcd
Rcrcrvcd
Rcrerved
READ RES

RXtJt<-r8US
IEUS<-RBSP

Res:rvad

rSus<-Rxt;
Rcrcrvcd
Rcscrvcd
Rcrcrvcd
Relcrved
Rcrcrved

READ RBS
RXt tt<-R8S
TBUS<-RBSP

Rcrcrvcd

note: Reserved asstgrrcnts are
for reaory lnterÍacc.

3rt

R,Ài-R contalns a8 scr.tch pàd locations. ïtre
aE locations arc Intended to be used for the folloringr

/nm-n:

2.2.2

PurPosca s

locat ton
Durpose
aaaaaaaaaaaaaaaaaaaaaaaaaoaaaaataaaaaaaaaaaaaaaaoaataaaaa

0 - 15

tlcrocodc tctporrries, RttPe-RtIPI5.
@ncral hrrposc Rcgisters, GpRt4pRf 5.
lntcrnal Proccssor Rcaistcrs, lpRe-IpRlS.
Data Íror RAI-R arc output to thc RBus of the cpu data pàth.
The scretch pad locatton is spcciÍicd by the RsRc field of
the ricrorcrd. rtre aseÍgncnt end solc uscful notations for
thc RSRC flcld are dcflncd ln SpA tablc 3.

16-30
31 17

RSnC (hott 8t trblc I hSnC ?trld t.llgl.ent Daotod by
aaaaaaaaaaaaaaaaaaaaaaaaoaaaaaaarrrltoóoaaaaaaaaaaaaoaaaa
RttP, 0-15
t0-3F
RlTP
t0-lF
GPR, C-15
GPR
2e-2F
IPR, e-l5
IPR
RriP IRxtn I
3A
RllIP
3l
DST ÍRrln I
DST
32
33
34
3s
36
37
3E

39
3A
38
3C
3D

3E
3F

rPR IRxlnl

IPR

GPR

ÍRlrrtl

Rescrvcil
tOTG LIT
ZERO

CLR RBSP

RTiPInX|I.or.ll

RSRC. DEF
RSRC. DEF
RSRC. DET
RSRC. DEI

RlTP

DSTÍRXl!.or.l I

DST

ÍRXll.or.l I

GPR

IPRÍRXln.or.ll

GPR

RIIP IRXr!+r I

DstInlln+l I
rPR ÍRltn+l I

IPR

RITP
DST

IPR

GPRÍRxlfl+l I

GPR

XOTE: RSRC esslgrrcnt end the dcf tnltions of sorc useful
nottt ion8.
scretch p.d vrtte and clock slgnals: To providc sone
2.2.3
flerlbtltty to thc rÍcrocodc tn ustng tha t.rporarles,
RÀt-R and RAi-I are lrplcrcntcd 80 thrt for i.i through
7, rrlttng to RlllP<t> alreyr trplys . sirult.neous tri[c
to tttp<l> rnd vlce yor8r. trplGlGntatlon of this
Ícaturc trporcs thtt durlng thc Íiret half of thc cyclc,
the SpA gCnCr.tcs tho rcretch p.d
sciccts
Íor t rcad oP€rttlon. Durtng thc rddrese,/chtp
sccond neff of the
c1rclc, the- spÀ g.ncr.tcs . [rotcnttally dlf Íerent 8ct of
eddress,/chtp !elects for . rrltc opcritlon.
clock slgnals uscd by the spA phtp.rG thc tí cl,t( L and
the DP PHÀSE H. Both clocl rlgnals ere uscd to dcf ine
the relatlve tlle frarc of a rlCroclrclc.
The tlre perlod atartlng tror the ristng edge of i clt( L

3a2

2.3
2.3. I

2.3.2
2.3.3

and terllnated ylth the rlstng edge of DP PHÀSE H is
deftned as the.flrst
half of the cycle'.
The tine
pertod startlng fror the rislng edge of DP PHAJE H and
terllnaÈed ulth the rl,slng edge of ll CLK t is def ined as
the 'second half of the cycler.
Ptn ?unctlons:

LIT I E: An lnput fron the nlcrouord uhich, uhen High,
indlcates th.t the RSRC fteld ls used to forn a literáI.
tfnder this condttion, the spA chip rill default rhe RsRc
to be the sane as LLLHHH, t.e. addressing RTt{p7
directly.
IISRC (l:t)
I:
A five btt field fron Èhe nicrouord to
control RÀl{-}r aatnly. See SPA Table 2 tor i ts
asslgnlent.
RSRC (5cf> l:
A six biÈ f- J fron the nicrouord used
to control RÀt-R nainly. bee SPA Table 3 for its
asslgruent.

2.3.a

SË t L: A decodcd slgnal frda the SpX field of the
ntcrorord.
, o
sPt{ tr L
lleanlng
tataaatttlaraaaatttatataataaaaaaataara
L
Erable rr I te to RÀl|-T
ll

2.3.5
2.3.6
2.3.?

2.3.8

Enable rrltc to RÀIi-R

ttrls sÍgnal is used to control the scratch p.d address
and the ehip select outputs durlng Èhe second half of
the c1rcle . See 3. {. 3 and 3. {. { .
À clock signal uscd to load all tenory
tr CLI L:
rlthln
Èhe chtpr generally this ls done at the
eleaents
rtslng edge of the clock.
D CLI EIABLE f,: An lnput signal used to cnable the
loadlng of RXUlt and RBSP. See sect.ons 2.4.1 and
2.1.2.2.
A clock slgnal used prinarily to control
DP PIÀSE E:
pad
scratch
address and thc chip select slgnals. It
the
gcneràte
used
to
an lnternal clock for the RBS,
is also
see 2.1.2.1.
An lnput signal used to indlcate uhether
D6T RTODE [:
the destinatlon aode of the current nacro instruction is
Reg ister node or not.

3e3

DST R'iODE H
hean i ng
taaaaaaaaataaaaaaaaaata.aaaaaaltaaaaaaioll
H
Register node

non register node

The signal is used to conditionally disable the rriting
to the GPR scratch Pad locations uhen thc RSRC-DST and
that DST RIIODE H is not asscrted. See SPA Table 8.

2.3.9
2. 3. lC

2.3.11

2.t.12

2. 3. l3

IRD RII! (t:l)

l: Ttrls is one of the Èhree sources to
be loaded to RXUlr. Ttlc four slgnals are usually the
register nrnber flcld of .n opcrand apeclfier.
IRD LD RXUi B: Ttris ls . control slgnal used to cnable
loading the IRD Rf,tll (3:C) H to Rl|tn. S€e section

2.4.1.
D SIZE <l:t) l:
Ttte tuo slgnals used to indicàte Èhe
data slze. Hhcn the iSRC-PUSH+ or PUSH-, the tuo slgnals
àre loadcd tnto RBS as descrlbed ln section Z.a.Z.l.

IISTR PEIïCH [:
Àn input slgnal to lndlcate that the
nlcro nachtne ls in Èhe statc of fetching r neu nacro
tnstructlon. Hhen asserted, thc RBSP uill be clcared at
lf CLf I r L. See section 2.4.2.2.
I8US <3:f) H: Ttese are four tri-state plns used to
inrerf ace the sPA chip vi rh rhe t{Bus of the cpu data
path.

Output to the I{BUS is controlled by the HSRC alone:

I{SRC

Effect on TJBUS

t{Bus

IíBUS<3:e)H-RNUti
IíBUS<3:e)H30'RBSP

t taataaaa laa aaaar a ar t aa aaa aaa aaaaaaaaaa aat la a

hBUS

REÀD RBS
ïBUS(3:0)Hrf(RBS)
Àll others
output dlsabled
NOTEz t (RBS) IS DEFINED ÀS

RBS<5:{)

f (RBs)

aa raaaataa aa aatart all aat

0l
l0

2.3. la

2.3. l5

{
I

rsPA (3:l) fc

The four scratch pad address signals
output to R,Àll-ll. see section 2. {.3.1 f or detinitiohs.
RSPA (3:t) f:
The four scratch pad address signals
ouÈput to RAli-R. see section 2. a. a.l f or def inttions.

301

2.3. t6

lltP cs L: Tlre chip select signal output to RÀtr-i. see

2.3.17

Rcs ltP L, Rcs GPR L, Rcs lpR L: Ttre chlp selecr signal
output to RÀil-R. See sectlon 2.4.11.2.
TITRL Ex L: A deccded slgnal fron RsRc (5:G) H and Lrr
0 H. Ihcn asserted, the slgnal uould enable an external
reglster (used to hold a alcrocode literal) to source
datr onto the R8US.
lhe algnal ls def lned rs follors:
tf (flrst half of the cycle) .and. (LIT e H - L).and.
(RSRC . LOXG LtTt
thcn LIIRL EX L . L elsc LITRL EN t r H.
EPÀSIA (l:l)
B: Tlre tuo statua output froa the SPÀ chip
used for ltcro-brànches.
See section 2. {.5 for
definittons.
Blocl Dtagrr:
Flgure 3 deplcts the block diagran of rhe spA chip.
Ttrere are f lve lajor sections.
A. RNUi rcglster
B. RBS, Rêgister Back up Stack
C. lddrcss and chlp select for RNr-il
D. Mdress and chlp selects for RAI{-R
E. STATUS
RXtn (R.glgtcr tllÉcr Rcalstert: Ttre RNt|rr is a { bit
D-type rcglster used Èo indirectly address a scratch pad

2.3.18

2.3.19
2.1

2.ll.l

aectlon 2.1.3.2.

locat lon.

Tfiere are three sources of data to load RNtfil:

A. À { bi t nuaber f ron the nicrosequencer ( IRD RNIII
(3: C) H)

B. ]íBUS (3:0) H
C. The reglster back up stack(RBSI.
IRD LD D EN
ilsRc
DaÈa loaded
ataaltaaalt lllalllaaaaaltaaa
atalataa aaa aaa aaaaaa aa aa aa aaaaaa a
H
x
X
IRD RNUIr (3:e ) H
H
L
RNtIi <- IíBUS XBUS (3:9) H
L
H
READ RBS
RBS< lz0)
o

(see 2.4.2,

uhere:

IRD LD-IRD LD Rtilult H
D EN -D CLK ENÀBLE H

305

rhcn thc rbovc condltlon lr settrf lcd, Rxltt is loadcd at
tho rtrlng ró9c oÍ thc i CLt L.

bglrtrr bcl-up Strcl íllst r ttrc R6s tr a 6 vord by 7
ltlcl, polnted ro by r rhrcc blt rcatrtcr catlcd ihe
II!
REEP. ÍREE<I:J> rlll bG urcd ro dcnorc thc bir poslrion
. <l:J> of thG st.ct locetlon polnt.cd to by RBsp.t
2.1.2.1 tte lmtc Scrcl: tlrc rt.ct Ítrclf ts rode up oÍ sir
trtnrprrmt lctchcr oÍ ravcn bt tr rldc cach. Hrcn the
retlon, date is
to by thc RBSP.
cl t, rtrcrc t ls
l thc rtslng edge
falllng cdgc of I
CLf L.
ltrr date loedcd arc thc RAi-R scretch pad address, the D
slzE (l:0) H, and rhcthcr thc rsRc spèctflcs a pusH- or
! PUSH+ opcrrtlon:

2.1.2

RBS<3: e)

RBS(5: {)
RBS<6>

2.a.2.2

Itr Ètnte r, RESPr ?hc RBSP I s . rhree bt t D-rype
rcalstcr. It cen elthcr bc clcrrcd or lncrelcntcd:
IFCH iSRC D Ex LIT
RSRC
RBSp is
aataaalaaaaaaaataaiaaaaaaaaiaaaaaaaaaaa laaaaaaaaataaaaa

ltxx

xxx
L
L
L

PUSH+
PUSH-

H
H
H

READ RBS
ALL CYTHER CONDITIOXS

ltrere:

X
t
X
X

aaaatr rr

cleared

CLR RBSP
cleared
noL(CLR RBSP, lncrenented

not(CLR RBSP) increaenÈed

_ :":(:':

:':'l i8'fiïi8:".

IFCH . IXSTR FETCh H

LfT-LIT0H

D Eil . D CLI( ENABLE H
l{hen belng cleared, the RBSP is loaded vi th 0 uhen the ir CLK L
a L.

l{hen belng increnented, the RBSP is loaded rith
rislng edge of the lt CLK L.
2. a.3

2.1.3. I

RBSE + I at the

Àddrcr and Chtp Selcct for RÀt-t:
Scratch Pad Àddrcsr: The scratch pàd address Èo RÀt{-}r
appears on the four fSPÀ (3:g) H pins. There are four
sources for Èhis set of signals:
IISRC (3: 0) H, d i rectl y f ron the microrc rd
RNUti, contents of RNUII

3C6

kt{tlt + l, I plus the contents of RNU}r
H, the sane address for R/Àtr-R
IlurÍng the first half of the cycle, the t{SpA <3:e) H
rtgnals.re speclfted by the ltsRc aloner àS defined in
RSPA (3:0)

SPÀ Table 1.

SPÀ IÀBLE I
TSRC AID TSPA DATÀ

ISRC
iSPA (3:O) E
a aaataaaaaaaa atr aa taaaaaaaaaaa aarr.
trllrP,9-15
IrSRC <3: 0) H
rnP ÍRxt!l
RÈU}T
lrniPÍRNtn+l I
RNt[.] + I
all others
C
Deftnltion of ËSPA (3:e) H duri
Durlng Èhe second half of the c
e i the r reaa I n the sane or syl t .RÀll-R, as deterlined by the spl{
i

SPT II L
IISPA (3: 0) H
aaa taaaaaa aaalt alaaaaaaaa aatataa ratttttit

L
Renains the same
H
duplicate RSpÀ (3:0) H
2.1.3.2 Chtp Sclect for RÀt{:
One pin is used to enable rhe
chip select for the 16 location RÀfi-lt.
Drrlng the flrst half of the cycle, Èhe chip select is
used to read data onto the ffBUS. The signal is defined
as3
if I|SRC - Reservedr then trTHP CS L - H
else tjllllP CS L = t.
Ilrring the second half of the cycle, the chip select is used to
enable a urite to RÀll-ll. SPA Table 5lists the conditions
under vhich the chip select is asserted.

307

SPA TAELE 5

CIIP SELECT ASSERTIOX DATÀ
sËlr Lt?
RSRC
Rl|rn
aaaaaataataataaataaaaaataaaaa

tilP cs L

iaaaaaaaa aaa ta aaaa raaaaaaaa aa

x
h

il
H
H

H
H
H

H
H
H
H

L
L
L
L
L
L
L
L
L
L
L
L
L

where'Lr;T

x
x

R1ilP, 0-7
Rll,lP, 8-15

RTtlPtRNt t{ I
RnrP I RNr$t I

Reserved
LONG LIT
ZERO

CLR RBSP

RfiPIRNUÈ.or.ll
RTI{P IRNUlt.or. I I

RTËPIRNtË+lI

RTËP IRNtn+l I

All others

;r;ï I

XL
XL
XL
XH
0-7
8-15
XL
XL
XL
XL
0-7
8-15
e-6, l5
7-14
XH

L
H

NOTE: SÍgnal definition for Èhe RÀlr-il chip select signal
durlng the second hatt of the cycle. Note thàt Èhe
slgnal is not affected by ltSRC.

2.1.1

Addrosa and Chlp Sclccts for RÀt-R:

2.l.l.l

Scratch Pad Àddrcssr RSPÀ: The scratch pad address to
RAX-R appear.s on the four RSPÀ <3:9) H pins. There are
five sources for this set of signals:
A. RSRC (3:0) H, directly from the nicroyord
8. RNtn, contents of RNul
C. RNtil + I, I plus the contents of RNUll (
D. RNtFl.or.l, RNIXI<3: l)'l
E. IISPA <3:0) H, the sane address for RAl{-1,1.
D,rring che first half of the cycle, the RSPÀ <3:0) H
signals are specified in SPa Table 6.

308

SPA TABLE 6
RSPA<3: 0>H SIGNALS DATA

LIT
RSRC
RSPA <3:e) H
alaatrtalaalatatalttaaaaataaaaaaatattatt
atttt
H
x
7
L
RïtrP, 0-15
RSRC (3:0) H
L
L

GPR, 0-l 5
lPR, 0-l 5

L
L
L
L

DST IRNrrt I
r PR Í RNrr{ |
GPR IRNrDrl

RilP Í RNt[|I

Reserved

LONG LIT

L
L

CLR RBSP

RnfPIRNUfr.or.l

L
L
L

GPRIRNt[.l.or.l

RNU}T
RNT'TI

RNUi

RNtlr
e
o
0
0

ZERO

RSRC <3:0) H
RSRC (3:0) H

Rllul{<3:l)'l

RNU{< 3: I )'l

DSl'[Rl|tn.or.l
I PR I RNUll.or . I

RNUfi<3:l)'l
RNIIr<3:I)rl
RNII{ + I

RTËP I RNG+r ]
DSTIRNtn+l I

I PR I RNUr+l I

GPR [RNU,t+l I

RNltr + I
RNtfi + I

RNITI + I

: LIT-LIT0H
DefiniÈion of the RSPA <3:0> H during ihe first half of Èhe
cycle o
D,rr ing the second hal f of the cycle, Èhe RSPÀ signals rrould
either renain the same or svitch to the address output for
RÀX-tlr àS determined by Èhe SPt{ }t L signal.
smÈL
RSPÀ (3:O) H
whe re

ta1laatttrritatttataaal'ratralaaaaaaalrataa

Renalns the sane
dupl icate lrspA <3: 0) H

(Note that during the second half of the cycle, either the nspÀ
or RSPÀ outputs switch, but never both.)

3e9

2.1.1.2

Cbtp Sclects for RAI-R: There are three chip select
slgnals f or RN,|-R, ui th one for each group of Èhe
scraÈch pad locations:

Chip select

used for

rlaltlaalltttaaaaattratllaatrataaartaa
RCS llIP L
RTÍrlP0-RIïPl5
RCS GPR L
GPRO-€ PRI5
RCS IPR L
IPRO-IPRI5

Itrring the firsÈ half of the cycle, the chip selects are
used Èo read a location fron only one group of the
scratch pad locations. SPA Table 7 lists the conditions
under rhich a signal is asserÈed.
,

SPA TABLE 7

SIGIÀL ÀSSERTION DATÀ

tIT

RSRCTGI

L
L
L
L
L

RTËP
DST

tataatataataatitaaiitara
H
anyth i ng

aaaaaaaaaiaaraaaaaaataiataa

IPR
GPR

RSRC. DEF

where: LIT = LIT e H

L
L

H
H

T -RCSTilPL
G =RCSGPRL
t =RCSIPRL
l.
Definitions of the chip selects for RAl,l-R
during the first of the cycle.
Drring the second half of the cycle, Èhe chip selecÈs are used
to enable a wrÍte to a location in only one group of the
scratch Pad locations. The chip selects for GPRrs and IPRrs are
specifieá in Sba Table 8, and ihe chip select for RTltlP is
specified ln SPA Table 9.

3Ls

SPÀ TÀILI 8

cËtP SELECT DITA (FOR GpRrS f IPR.S)
LIT
RSRC
NTODE G

8N
I
aaaaaaaaaaaaataaaataaaaaaiaataaataaaaaaitaealraaaaa.aataia
LXXXHH
HHXXHH
H
L
RTIIP
X
H
H
HLDSTH
L
H
HLDSTL
H
H
H
L
IPR
X
H
L
HLGPRX
L
H
H
L
RSRC.DEF X
H
H
rhcre3 LtT . LÍ,T A H
SPttIr-SPliL
RilODE ! DST RITODE H
c-RCSGPRt
t-RCSIPRL
Definitions of the chip selects for the GPRrs and
the IPRrs during the second half of Èhe cycle.
SPÀ TABLE 9

c[rP SELECT DÀTÀ (FOR RtlP]

RSRC
LIT
SËT
TSRC
RNIN
aaaaataallaataaarataaaaarartaaataaltaaaaaatatrtaatttlaatrrt
HHXXXL
Rll|P
H
L
X
x
L
RSRC.DEF X
Hi
x
H
L
GPR
X
x
L
IPR
X
H
x
H

DST

L
L
L
L
L
L
L

x
x
x
x
x
x
x

ltrP, o-7
ilrilP, g-r5
ilTr.|P [Rl|rrr{ |
ilntP[RNtI{]
lt1r.|P IRNt [r+l |
. ltlll,lP I RNUI+I ]
all others
lf

x
x
s-?
8-r5
0-6, l5
7-f 4
X

L
L
H

H
H

h
L
H

L
H

rhere: SPI{ll r SPl{ }t L
LIT=LITgH
T = RCS llrP L
Def inition of the RCS RI!{P L signal during the second half of
the cycle,

3lt

2.1. 5

Statu8: The STATUS logic generates tuo status signals,
H, useful for nicro-branches. The status
output is deterrlned by both the RSRC and the ttSRC.
SPASTA (l:0)

l{hen RsRc =( GpR or Dsr l, signal def initions for srÀTus

(l:9)

H are:

SPASTA <l: g) H
t tltataallaltrtiaraaalrllaaatatatlatatlaaallraa|laaaa
REÀD RBS
Undef i ned
Rl{Ul'r< -trB US
Undef i ned
}JBUS<-RBSP
Undef i ned

ilSRC

Àll oÈhers

LL:RNtlt=àny
HL:RNlll{-1
HH:RNull=$

LH : RNIFI = l4

l{hen RSRC = anything but ( GPR or Dsr l,
STATUS (l:0) H are:

val ue but 617 or l4

signal def initions for

sPÀsTA (l:0) H
tt l1laaataaatltaaartattrttaarirlaaatttaaalalaaaata
RNt tr< -t{B.us
LL : IÍBUS - 8r9rlgrll,l2r or l3
HL : I{BUS B 5.6.7.IA. or 15
HH : IÍBUS 3 0r1r2.3, or {
REÀD RBS
if RBS(6)=I then HL else LL
I{B US <-RBSP
if RBSP = e Èhen LH eise LL
Àl I others
LL

fisRc

312

IRD RXI'}I I H --->t0l
D SILE O }I ---> t e2
IRD LD RTTI| H ---> I 03
D CLT EIA8LE H ---> t 0{
trsRc 3 H --->t05

48t <--SPÀ

rrCLrL ---> t e6

DP PIIÀSE H --->tc7
ÈsRc 2 ar ---> t 08
ltsRc I H ---> t c9

rsRc e H --->tl0
rsRc { H --->tll
VGÀ ----t l2 .LID.

a a a o a aa

vcc ----t I 3 . DOfÀ|.

RSPA I H

IISPÀ I H

<--- I I tf

<---t I 5
rsPA 2 Jr <--- t l6
RSPA 2 }I <---t l7
HTilP CS L <--- t l8
RSPA O H <---t I 9
IISPÀ O H <---t20
RSPÀ 3 H <---t 2 I
}ISPA 3 H <--- t 22
RSRC 2 H --->t23
sPlí lt t ---> t 24

.a
aaaaaaa

RD RNT.Ii 3 H

{?t<--- IRD RN$I 2 H

{6 t <--> XBUS 02 H

{5t <--> rÍBus 03 H

rl{ t <--- IRD RNUT O H
{3 t <--> lrBus go H
{2 t <--> r{Bus 0l H
{t t ---> SPASTÀ O H
ae I ---> SPÀSTA I H

39 r
38 t
37 t
36 t
35 r
3.1t
33 t
32 I
3t t
3e t
29 t
28 t
2? t
26 I

<--- DSIZEIH
---- GROUND
<--- INSTR FETCH
---> RCS GPR L
---- GROUI{D
<--- RSRC I H
---> LITRL EN L
<--- RSRC 3 H
<--- DST RiODE H
<--- RSRC 'I H
<--- RSRC 5 H
<--- LITOH
<--- RSRC O H
---> RCS IPR L

25t---> RCS TIIP L

SPA FIGURE I

PIN CONFIGURÀTION DIÀGRÀI{ ÀND PIN IDENTIFICATION

3r3

3.21

StrI??ER CO]ITROL CHIP

GCTSRAL DISCRIII.IIOI:

(sRr-E6l I l

Ttre main purpose of the SRlt chip i's Èo decode the ROT f ield and to
send the SRlt chips.the appropriate controls.

In addiÈion, the SRK also outpuÈsr oo a per ro ta to r funct ion
basis, Èvo stàtus stgnals used for nicrobranches.

3t{

SRI ?rbla I

Pln ldcntlf lcatlon and Gate fypc

lPrx r I Pril rD

I COI'IT'IENTS

I GATE TYPE I

12
13
lf
15

I
I
I
I

lcArrNF

18
le

lRoTOH
fnoTsH
ISDCFUNCTIoN3L
fDslzEoH
lDsIzElH

|HruxzBlu
lRorrH

I
I

lPRrFuNcrroNsoL

lrC llruxzBgH
lrr
I sHF PoS I L
lf{
lÍruxzB3H
lrs ln|uxzB2H
116 fHBusoSH
lr7 lrÍBus 02Jl
lr8 | rBus 07 H
lr9 | mus e3
;Ëus eo
ug n]l
,av
129
| raus
l2r I mus e6 H
122 | ïBUS s4

I
I
I
I

icAtrNF

tGA1TTN

tcAlTNF
gcjilTNF

iórtrim
icirrtp
icÁirxr
f clrrnr

tc
iclirnr
tcirrlr

123

421
125
126
121
,28
429
l3c
| 3r
132
133
13{
f36
137
f39
al9

llf

112
fl3
I'1
la5
116
llZ

| SBUS 06 H

lsBus0sH
lrsus0lH
lsBuse?H
| sBus gOH
lsBUscI H
lsBus03H
l sBus 02 H
I' sBUs 0{ H
lsurPose L
| s8D Pos 3 L
lSnrPoS4L
| sTÀTus sH
lsTATuslH
ISHFPOS? L
lQDcLrL

I
I
I
|
I
I
I
|
I
|
| ,
I
I
I
I

ISECFUXCTION5L
ISECFUNCTIOI|4L
lRoTlH
IPRIFU]{CTIoNIL

I
I
I
I
I
I

I SEC FUNCTION I L
ISECFUNCTIoileL
lsDcFuxcTror{2 L

ROT2H

315

lcAlTzF

lcÀITNF

tc^lrzF

| cAlrzF

lcAlTzF

lcAtrzF

l cAlrz;
| cAlTzD
f 6ÀITTN .ï
| cAlr11y ï
I

lcAlTTN
lcÀlTTrl
lcÀITTN

lcÀlTlï{

tcÀtTNF

I GAITITTI
lcÀtTTN
lcÀlrTr{
IGAITTN

lcAlTTlrl
lcAlTNF

lcAlTTtl

IGAITNF

Prrforranca s

2.1

cbtp va Ptn Srrrary:

IÀ|rE

r/o

ïEUS (e7z0l> H

PIN
couNT

ELECTRICAL

LOGICÀL

IN8
lN,/ouT 8
Ir{
6

TRI-STÀTE
ÀC?TVE Ht
TRI-STATE
ACTIVE HI
ROt <5:t) H
TRI-STATE
ÀCTIVE HI
PRI FUICTIorI (l:e) L
ouT 2
IOTEIí POLE
ACTIVE LOI
sEC FU||CTIOX (5:C) L
ouT
6
TOTETi POLE
ACTII'E Lfl
8ËF POS ({:0) L
ouT 5
TOTEII POLE
ACTIVD LOfí
D SIZD (l: e) H
IN2
TOTEII POLE
ÀCIIVE HI
nuxz B(3:t) H
IN{
OPEX COLLECTOR ACTIVE III
ETAIUS (l:0) H
ouT 2
TOIElr POLE
ACITVE HI
tNl
(CLOCK)
TOTE!| PoLE
QD Ctr L
NOTE:
Unless otheryise speclfied, all slgnals are erpressed
ln loglcal values, and all nunbers-arc ln dectáals.
(btput Gontrol Plns : Ttre SRI( sends three 9 roups o f
2.2
control slgnals to the SRII chlps. The6e àre briefly
descrtbed here, rith lore detall ln Sectton 2.6.
PRI (PRI ?UICIIC (l:!) l.l: A tuo blt slgnal yhlch
2.2. L
lnd lcates the pr hary f unct ion :
SEUS <C7zCC>

PRI

o
I

2
3

PRIltrÀRT FUNCTION

ExTz ll, R

EXTZ llrll

EmZ RrR

tilsc

2.2.2

SEC (6EC FUXCTIOI (5:t)

2.2. t

SEI FOS (SBF FOS <lrt) L) r

Ll: A slr bit slgnal vhlch
lndlceÈer clthcr the end bÍ' positlon of an EXTZ prtaary
functlon, or Èhc secondary control for r IIISC prtnary
functlon .
A flve btt stgnal uhlch

lndlcates elÈher the startlng btt position for tn EXTZ
functton or the shlft count for sore ilISC functions.
Only blt<{:2> arc used by the SRI{ chtps. tte reoalnlng
tuo btÈs are used by the ALP chlps to further shift.the
SRlf ouÈputs by e . l, 2 or 3 blts.
In addltlon to Èhe above three groups of slgnals, Èhe
SRK aleo outputs a tuo btÈ status sÍgnal uscd for nÍcro
branches. ïhe STATUS slgnale ere conpletely speclfled

ln Tables V and Vl.

316

2.3

2.t.t

rnpuÈ control Ptnrs
ltre sRx recelves Èhe foJloring
rlgnals for controllfng purposes.
ilUIZ E(3r2ol.ol), Ir fircsc are four signals sent by the
ALP chlpe to Índlccte rtrcthcr caeh of the four uytàs is
?cro
3

ïFUXZ Bcn> H

2.3.2

D srzS (D srzt (l:l) l):
tfrese àre tuo stgnals f rol the
lfcrglgequencer. lndlcattng^ the data size aé spgcified by
thc rsrRt and the D TïpE Étclos fron Èhe alcrà:vord.

2.3. t

Ror (5:!) t: rtese arê thc slx btt Ror tield fror the
rlcro-rord to control the rotator tn gcneral.
clocr srGrÀL: - ttrc only clock stgnal reeeived is rhe eD
CLI( L. rhtch ls
used Èo latch the-pl and the SL.
nrA BUSrcr: ttre sRK lnterf aces ul th the lou order
bt/tc of the Èuo datr buses on the. cpu aain data
path.

2.3.1
2.1

llrcse are Èhe I|BUS and the SBUS.
Both buscs ere used by Èhe sRK tor loading the tuo
Ínternal laÈches and for decodlng sone status
condltlons.
rhe sBus is also used to unload the pL and the sL back
onto the data path, under this condltton the SRt| chip

rlll

sBus.

2.5

2.5. I

output all zerots onto the higher bytes of the

Bt Cf DtAGtÀl:
Figure 2-IgS of rhe vAx-t t/7is cpu
Tcchnlcal Descrlption deplcts the functlonal block
dlagraa of Èhe SRf, Chlp.
POE!?IOI tÀttCE (Pt, AID SIZE lÀltCn (SLl: The pL and sL
arc 6 btt feed-through latches. In gqneral, the SL is
uecd to speclfy the slze of bit field bnd pL rhe nunber
of blts to be shlfted ln aost of the rotàtor functions.
toadlng of elÈhcr latehes is enablcd expltcttly by the
ROT fteld.
Ihen cnabled, data ylll feed through the
latch as long rE the clock sÍgncl rQD CLK L. is at a low
levcli at the rislng edge of the clock, the input data
ls rGtrlned.
Êoth latches can be output to Èhe SBUS(Z:0)r utth
SBUS(7:5) ! g-

317

2.5.2

PRI LOGIC: The PRI logÍc decodes the ROT field and the

D SIZE slgnals to output Fhc pRI slgnals to the

ch ips .

2.5.3
2.5.3. I

2.3.3.2
2.5.a

2.5.a.1

2.5.a.2

sRfl

68C LOGICs De-pending on the ROT f ield, the SEC logic
SEC signels f rol tu,o sources:

generates thc sir bit

By pure decodlng of the ROT field and thG D SIZE, rhis
is used for thc rajorlty of thc rotrtor functions.

rhen the PRr logic lndlcatcs a itsc functÍon (i.e. pRr
(l:0) - 3l , only SEC<3:f) ar" rcanlngf ul . tfnder this
conditlonr trp nurbcrs arc llstcd in sRK Toble 2 under
the collnn SEC<5:9). The flrst nurbcr lndtcatcs yhat
happens to be output frol SEC<5:{), and Èhc second
nuaber lndtcatcs sEc<3:e), Èhe sccondary function code.
By perforllng the operarton SL + pl,<l:e> -1, Èhis is
used for sole Extz functlons vhlch use sL to spccify the
size of a bit f i.eld.
Sll? FOS LOGIC: ïhe SHF pO,: logic aenerates the f ive

btt SilF POS stgnals fror tlo sourccss
By pure dccodtng of the ROt field, Èhe D SIZE and rhe
míurz B(3:0) tnputs. ttrls ls used vhcn a shlfÈ counÈ is
expltcltly specitied rith the rotator functlon.
By pcrfornlng soDG 2's corpl,crent Àtu functions on the
PL and SL. The posslble ÀLU functlons ares
PL

-(PL + SL)
- (Pr)
PL+SL
2.5.5

FrxD ?rRsr Locrc: Ítrts lr provtded for the .pL <-- trssfunctton, the rcsult of uhtch ls a function of the riluxz
B(3:e) slgnals and thc SBUS(?:e).

2.5.6

srATUs: The stÀTus loglc outputs r tuo biÈ slgnal as à
functlon of all lnput control slgnals aE uell Js the pL
and the SL. Sec SRK Tablcs.
Gontrol ptnr, Dttrtl Drscrlptlon:
(tr a per
9utpu!
functlon besls, the loglcal varue fàr the pRr., sEc
and
sJlF Pol slgnals rre llstcd tn sRÍ Tabre z. Froa the udy
thrt these thrcc groups of slgnals arG dcrlved, ihe 6€
rotàtor functlonr can bc dtvtdco into eight êlass.r,

2.6

vhlch are descrlbcd hcreln.

318

2.f. I

2.4.2

2.Í. t

2.6. I

2.6.3

2.6.5. I

tftZ o 3L [?EftÍr
Por thtr cl.3t o[ Íurrctlonrr S! ir
u..d to rpoelÍy the .ln of rhe btt fleld. ÍrG sEc
rlgnrlr aÍ. c.lcul.td .as
8tC . Í (6t + ?L<l: f) -l L Írtch G.l.nrÍtl ly lrÉlcttcr
che .nd btt pór|tlon rlth rcspcct to thc sÓus outPut.
Ílro r...on th.t only pL<l:?) lr lnvolvcd lr th.t ártr
...o.t
thr SIUS hrr rtrcrdy bccn roteted by pL<t:2)
nlbbter.
ïb rrv. decodtng hrrdnr. ln the stt chtpr, the sRr rlro
P.fforrr a loglcrt op.rattoF on output SDC<a>, !o Èh.t,
lrt tt?. 8L + ?tclrt> -l
th.a 8tC<a> r tl?(l) .Ol. lt?<5>
IrÉ 6lc(tr !rf) r ttP(sr !:t).
3ff!r St tE Urtr
For thtr clrtr of Íunctlonr, thc
3l!. lr orpltcltly rp.clÍtod rÍth thr rot.tor tunctlon,
ro th.t th. EDC rlgnrlr ir r dtrect docodtrq of thc ROt
flrld.
rolrt3 llGl?r A Íunctlon ln thir el..t tr osr.nttelly
th. .-o .. rn SItl ÍuncÈlon .rcept th.t thc tl rc li
drÍrul ted to t2.
ïto rchtrve . rot.tG r tght
Íungtlonrl tty, thr ERt Íorcrr the EeC tlgnrlr ro tc.
nt-bafr gtoator thrn tt.
lOtltt L37lr
A rot.to lcft tunctlontl try ls
.rs.ntlrtly .n Er"z Íunctlon rlth rh. sizE defrultld ro
tZ rod rlth tbc 88D FG . the ncgrtrd vrluc of thc
orlglnrl rotêto cotrtt.
ïb tchlcve the rot.t. lett functlonrllty, thc SRI Íorccs
the SDC' rlgnall to rcc nurberr gr..tGr th.n 33r rnd
th. orlglnrl rotrte count) to thc Sf,F POS
outpotr (f
rlgnrtr.
Sllll llclt/8ttFl LlFlr A rhtft lcft or . chltt rlght
Íunctlonrllty lr pcrÍorrcd ln thc SRt chÍps .s .
dlrtlnct Íunctlon (not . rubrtt oÍ thc EffZ tunetlongl.
llro rrln rolr of thc SRI lr to calputc thr thlÍt eount.
Dbr a rhlÍt rlght fwrctlonrtlry, the thltt count hpl lcd
tn thr ROT Íteld lr outputtcd to Èhc SltE FOS. l'or t
rhlft lcft Ínnctlonellty, thc SltF FOs ls Èhe ncaetcd
vrlue of thC thlÍt count. An crc.ptlon to thts cless is
tho ASL.R.SIZ funcÈlon, u?rlch lnvolvcs lorG thcn . shlft
leÍt functlonellty.
Srcn SllF FOS ls Ot an ASL R function tn the
l8l.l.8lt:
6Rt chtp rculd producc all zcro's. To rcredy this
drflclrncy, thc SRl uould rcnd thc SRlt chlps a diffcrcnt
rt oÍ rlgnels uhcn D SIZE . C.
319

Spccl f lcrlltr,

ulnn DSIZE.f:

Pnl .2ÍEltillrll
SEC . 52 (btvc the ar. cfÍcct es SIZE . 32t
SIF FG . aAnd drcn D SIZE r l, 2, 3:
D STZE

s8c

PNT

3
3
3

2
3

(rtsc,
(rrsc,
(rrscl

strD FOS

52íASL Rl

52(ASt Rl
52 (ÀSr Rl

lftrCf t$Dlrc:
Ihcn clthcr thc PL or tb. SL lr lordcd,
thc SRI rlll control thc SRf chtpr io th.t rerntngful
data .ppCar on thc SEUS. ln p.rtlculrr, rlron drtt is
lordcd frc thc IDtfS, 11.G. SL.PL ID or PL.SL nl ,
th. SRI chtpt utll pcrfort r 'lorT-ytc OFF. funcETon !o
th.t thc snr ctn output thc othcr lrtch (thc onG utrtch
lr not bclng lorócdl onto thc SDUS. Sron dttr lr lordcd
fra thc SEIfS (l.e . OLIT|.pL
LIt or OLIIT.SL Lltl,
th. SRI chipt rtll pcrfort - 'Ol.ltf' tunctlon -so thtt
thc rlcro-rord short lltcrtl lr lordcd lnto thc lttch.
ln rddltion, trro othcr Íunctlont .rG provtdcd to lord
tho PL tor rpccitl purlntc. llrcle trc (f l Olftr.pt.a3
IB .nd (2, PL <-- iSS functlonr.
2.6.6.> oLltr.?L at
oÈhcr bltr oÍ PL .ra unchangcd. ttte control rtgnels
rccclvcd by Èho sRt chlpr lr . olrrt funcÈlon ro th.t
drtr rppcrrlng on thc saus ls thc l-GrtGtrdcd vcrslon ot
tho IITRL ftrld.
2.C.c

2.5.6.2

r_lgnrlt to locrtc thc lcft rost non toro byte on
ïlUfZ^
th. t8lrs, rnd thcn controlr thc sRt chtps to rotrtc th.t
bytc onto SEtS<?:f). Ilth thc tnforretlon on thc
SBIIS<? : t) tnd thc nuIZ clgntlr r the SRf I s abl.c to
locrtc thc lolr slgnlflcant btt rct on Èhc iBUS.
Slgnals acnt to thc ERt chlps erc:
. f
(EIIZ lrll
.
(SItD . 32)
sEc
63
r
SHF FOS
I'x'rr!(Bll|t uherc n.N ls . tunction o[
thc ITUXZ llgnels.
PRI

ffiUXZ<3: l)

0xxx
lOxx

lttx
llrr

I
I

320

Alro PL<l:!) lr loeded rith t.I rnd pL<2:0) loeded
rlth r vtlue decodcd Írc SDttS<?:t):
8lU8<7 r f)

PL<2: f )

IIIIIIII

tll
tl,
Irl
l!t
tll
tlt
,rl
a..

ttllltrr
'IITTIII
,rf lrrlr
.,,'TIII

tltarlrr
.q. ,trtrtlr

aaaaaaar

2.4.7

lfttt lft'ODlEr
loth tho PL rnd SL ctn bc
onto
th. 6llt8. fio ERI eontrolr the SRf chtpt ruch rced
th.t
th.y
turn ofÍ th. lor bytc erÉ output rll zclor to thc htghci

b1Êor.

2.C.4

llSCtLtlfFUSr
Dunctlonr Èh.t do not foll lnto thc
rbove clrrel ara Fr. or lcr acc typ.i of dttr
rhuÍtlt_ng op.r.tlonr herÉlcd dlrcctly by thc sRt chlpr.
llrr rote oÍ th. snl lr trrely to docode thc RoT fr-rd
rnd to 3.nd tho SRt chlpt th. .pproprlrtc tlgntlr.

tlt lrblr 2

rntc

8t? t6<t:

etlss
t

t(EITZ trRl 8.. 2.6.1

xz.ln
IZ.ll

I (8XlZ lrtD Se c 2.6.1

IZ. RR

2(EItt RrRl Soo 2.6.1

I
I

ÀsR.l. P

RR.IR. P

(rrsct

trl2(AsR rl

Rn. li. P

ítrtz trRD 63
t (ExTt trt) 63

RR. RN. P

2 íEITZ RrRl 63

RR.NR. E

RL.RI.I

,(EXrt t,Rl 63
, (Ertl t,Rl 63

RR.IR.I

,(8XrZ t,R) 60

RR. RR. SIZ

2 (EXTZ R,R)

(DSIZE+l I 18

SL
28

32r

8rr trblr 2 (Contl
8E<t:t>

Ft llEtc

rlt(lrt)

8l? tG<l:l)

ll
l2
l3
la
l5
l6

RR.IR.9

, (EXtZ r,Rl 62

rz.Prl

I (lrtz t,tl

It.Y?T

I (trïz t,tl

nn.n. stz
csilt!

I (EXIZ t,tl

(DSIZE+l I rE

I íErÍl trr)

GI?ETP

I (txtz r,rl

RL.n. Plt

cttztr

I (EXTZ r,tl 5t
3 (rrsc)
3, I(cl^R 2 BrTE'

ct.altr

t(rtscl

3,a(cLR t BïTEI

clxttr

t,3(clr 3 8rlE)

ASL.R.7

(rtsc,
3(rlsct

2r a (ASt R'

ztno

(rrsc)

3, 5 (ASL rl

AEL. R. SIZ

(sEE

2.6.5. I

)

2tl

ECETP

(rrsc)

tr 9 (ECD SIAP'

GET?P?

t (rrscl

?PACI

3,t(FP FRACI)
2, lt (FP PACiI

CVIPT

2o lo (cvrPil )

coxx. slz

0, l3(coxstAxT El

AER.I.3

(rISCI

(rrscl
3 (rtsc,
3

DSTZEI

cttss

0.12 (AsR Ír)

DPTIT

(rrsc)
3 (rrscl

2r l5 (FP ttT)

CVTf,P

3 (rISC )

t, la (cymP )

RL. RI. FS

t (Errz r, R)

- (PL + SL)

{

RL.II. P

I (EXTZ t,tl

- (PL}

{

RL. RR. P

2 (EXIZ R, R)

- (PL)

{

322

Ft EIC

8lr ttblr 2 (6nt1
ttt<trt>
t!g<irt>

nL.nl.?

,(3rtz rrRl 63

RN .

IR. PE

8l? tG(t:!)

Ctlas

,(trrz r,Rl 63

- (PL;
(Pt + sL,

RR.N. PS

I (tnz t,tl

(PL + SL)

RR. RR. PE

(Errt R, Rl 63

(PL + St'

PL (-- rES

I Ítx?z r,t)

sEE 2.(6.6.2

ASL. R. P

3, a (ASL R'

AtL.I. P

t(rtsc,
t (itscl

3,5 (ASt rt

- (PL}
': (Pr,

ASR.l. -P

t (rrscl

3.t2(ÀSR il

- (Pr1

Z LITPL

(ntscl

3,7 (Ltt ZERO)

- (PL)

(rtsc,

lr2(LO BrlE OFF)

PL.SL _ rB

1,2(LO Dï?E OFF)

3, 2 ( LO BrlE OFF)

2a7

SL.PL _ m

t(rtsc)
3 (rtscl
3 (rrscl

207
E6

4.2(LO DïTE OFF)

SÀiE AS RO?:39 6

Z LITE

c,7 (LtT ZERO)

t9
5C

zLtt28
zLtt24

zLÍt20

LITI6

Lrtl2

(rrscl
3 (rrscl
3 (rtscl
3

3(rtsc,
3 (rtsc,
3 (iISC'

3,7(LtT ZERO)
3r 7(Lt? ZERO)
3,7 (LIT ZERO)

I
l2

o.7 (LIT ZERO)

2,7 (LrT ZERO)

323

{

I
I
I
I
I
I

srr ?lbh 2 íCoart

rct rEtc

tl? ;Os<t:t)

z LttS

zLtttl

OLIT'

i llrus I

oLrt2a

3(rrscl
3 (rrscl
3 (rrsct
3 (rrsc)
3 (rlgc,

OLIT3. PL LII

oLtrl6
OLI?I.SL LIT

62
63

ct Ss

317(Lt? zrnol

3,7 (LIt zEBo,

t,6 (Lrt orEl

3r 6 (Llt orE)

2,6 ( Lr? oxE)

I
I
I

(rtrscl

2r 6 (Ltt oxE)

(irscl
3 (irscl

0r6 (LtT o0rEl

0' 6 (LIt oxE)

OLITS

3 (fi Isc )

2r6 (Lrt oxEl

OLITO. PLI3 TB

(itsc)

Cr6(LIT oNE)

SRI lablr

..a

RqTA1!CR IIJIC'IOIS

ROt rtntc
c

xz.iR

xz.H

renrFtt(r

s?Atus<t>

;EXfZ ltR' FOS.PLT SIZETSL i SL<5: C)rC
IEXTZ l'1, PIOS:PLr SIZE.SL t SL<5:t)r0

2
;EXTZ R'R, POS-PLr SIZETSL i SL<5: 0)rt
ASR.F. P
3
;ARI SIF RIGHT tr'NO.BlTSrPLi o
I RR.NR. P ;ROT RIGIIT t'R, NO.BITSTPL t SL<5: C)r0
RR.II. P
5
tROT RIGHT Itl,l, NO.BII'IS=PL i SL<5:9)re
RR.
RR.
P
6
;ROT RIGIIT R'R, NO.BITS.PL t SL<5: e)-0
7
RR.TR.S
;RO? RIGllt i'R, lfO.BITS.SL i o
RL.
RI.I
8
;ROT LEFT R'lf , I{O. BITS.{ i D slze<l>
RR.ltR.
I
9
;ROT RIGHT i'R, NO.BITS.{ i D size<l>
RIGHT RtR, Bf I.213,.e
n RR. RR. SIZ ;ROT
D stze<l>
BYTES
i
ll RR.llR. 9 ;ROT RIGHT i'R, lfO.8ITS.9 t D sÍze<l>
t2 xz. PTx
POS-07r SIZE-23 ; D si zê<l >
; EXTZ l'tl,

XZ.RR

32a

stAtus<t>
(PL<ls t>+SL) >32

(PL<l:t)+SL) >32
(PL<l: C>+SL) >32
PL<5 >

(PL<l:0>+SL) >32
(PL<l:C>+SL) >32
(PL<l:0>+SL) >32

PL<5 >

D slzc<0)
D size(0)
D sizc<0)
D size(9)
D size<O>

6lI tebh t (Cont,
Rotrmn ?trcttors

Erltttc
II

téxT3 F'ir

RR.ll.SIZ ,ROl RIGBT t'l

Stttrts<l>

8l lr2r3rl

BrrEs
IGE? ,'iEUS<3:O)

l5 GEfrrB
I6 GETEXP
;EXIZ lri FOSr7r St2E . t
17 RL.tt. l'.fg ;RO? LEFI i'll, XO. BltS-9
l8 ctn2Br
lcl5: f >
r9 crxl8r ,Cltr
,CLn t|<l?: e )
2a ct-R3Br
,Ct^R t(23: O>
2l ASL.R.7
sARl StrF tEFt R BI ? tlts

22 ZERO
;COISTAXI t
23 ASL.R.STZ ;ÀRl SAF LEPT R Bï O,lr2r3
BITS

D strc<l)
a
a

a
a
a
a
a
a
a
a

D elzccl)

stttua<t>
slzc
D rlzc(t)

D rizcct>

SB<t:t).nc.t SB<3:0).nc.(llrl3)
SB< t: t ).nc. t SB<t:f>.nc. (l l, l3l
SB( 3 : t>. na. I SE<3:t).nc.(llrl3,
SE<t:f>.nc.t SB<3:t>.nc. (llrl3l
ASCI I r l9n
IE.nc.15
ASCI I rlgn
ID.nc.l5

ASCI I r l9n
ÀSCl I s ign

18.nc.15

HB.nc.15

2' BCDSTP
IBCD tllAP, iEUS
t SB< 3: e > .nc. 0 SB<3:9).nc. (llrl3,
25 GETFPF
;UxPACf FP ?RÀCïIOI, lrR
t SB<3:f).nc.t SB<3:g>.nc.(llrl3,
26 FPACT
rPACÍ FP DATI.irlrFRAC RrEfP; SB< 3: f> .ne. t SB<3:0).nc. (llrl3l
27 CVTPX
;COllYEh? PACTED m Il;ERte t 58< 3 : 0). ne. t SB<3:t).nc. (l l, l3)
28 COX. StZ TCOISTAX? I,2.a.t OX SIZE t ASCI I slgn HB.ne.15
29 ASR.I.3 lÀRl SllF RIGHT irlfO.BlTSr3 t
I s l9n IB.ne.15
3E FPLIT
ASCI I slgn
IB. nc . 15
TEIPAXD FLOÀTtxc FOtxT LtT t ^SCl
3I CVTf,P
;Eolrnnt xriEntc to pAcrED i ASCI I s ign IB.ne.l5
XOTE: IB dcnotcr mUS lor byte
SB dcnotcr SBUS
'ASCII slgn' dcnotC8 IB.ne. (32, {3, or l5)

325

ERr trblc I

ROtAïln ?rnerl(fE

rc? rmtc

D3ScntrtIC

Stttus<l>

s?A?t s<r>

32 RL.Ri.FS rROt LED'T R'ITXO.BITS.PL+SL; SL< 5: f)-O
undcf ined
t3 RL.ii.P
;ROt LEFT lrlrXO. BITS - PL; SL<5: !)r0
PL<5>
3{ RL.RR.P ,RO? LEF? RfRrXO. EITS - PL; St< 5: e)r0
PL<5>
35 RL. RI. P ,ROT LEFT PrlrXO. BITS . PL; IiUX<31: l6> IiUI<l 5:00>
.nQ. t
. ne.0
36 RR.lR. PiS 3ROÍ RIGHT l'RTIO.BITS.PL+SL; SL<5: C)c0
(PL<a:t>+SLl )32
3? RR.ll. FS sROt RtGllT i' l, lfO. B!TS-PL+SL; SL<5: t)re
(PL<a: e>+sLl )32
38 RR.RR.PS IROT RIGIIT R' R, XO.BIIiS.PL+SL, SL(5:0)-O
(PL<a:t>+SL! >32
39 PL:i6S
lFtf,D iOST SIG. 8IT SET iEUSt rlUX<31: 16> HiUI<l 5: 0t>
.nc. t

.C ASL.R.P IARI SHD LEFT R, XO.EITS.PL t PL<a:0).C
al AsL.t.P SARI SHF LEFT t. IIO.BI?S-PL i PL<l:0)-e
12 ASR.l.-P ,ARI SHF RIGHT i,XO.BttS.-pL; PL<a:0).C
13 ZLITPL sa Ex? LITSROT lcft PL BITS t PL<a:0)r0
aa Pr
TB>37
;SBUS
{5 PL.SL.TB rSL <- IBUS<S:0)r SBUS
H8>31
a6 sL
wB>3t
;SAUS <- SL
l7 sL. PL:r8 tPL (- IBIIS(5:C)r SBUS
TB>3I
a

{8 ZLÍt'
a9 2LrT28

rt EX? LITTROT left Oa BI?S; 18(7)r0
r0 EXf L!?3ROT lcft 28 B ITS; IE( 7 )r0
5a z'-\tzl
rt EXT Lltlilot lctt 2a EIIS; IB(7)-0
51 ?Lttza
re DÍt LlïrROT lcft 2a 8I?S; IB(?).0
32 Z rr"t6
,, EXt LI!'|3ROT left 16 B ITS; 18(7)rC
53 ZLtttz
,, DXt LItlROt lcft 12 BITS; IB(7).e
5I ZLITS
,f tft LltlsROT lcft ,8 EITS; 18(7)r3
55 ZLITI
,, EÍl LIï:sROT lcft aa BITS; XB(7)re
56 otrTt
ll EIt Llï.lrROT lcft 9e B TTS; HB(7).0
18( 7).0
57 irxusl
tCOllStAlt OF ALL l'S
EXt
LIITROT
EITS;
lcft
IB(7)re
58 o!.rT2l
24
;l
H8( 7 )r0
59 OLIT'.PL. ,PL <- LIT
LIT
60 OLITI6
rl Err LITSROT left 16 BITS; HB( 7)-0
H8<7)'e
6l OLITO.SL. tSL
ttT
62 OLITS ;l EXT LITSROT left e8 BITS; lfB( 7)re
63 OLtTe. ;PL(l:3) <- wtsUs<l:O) i lB(7)r0
a

PLI3. TB

.nC.,

Pl <5>

Pl<5>

Pl <5>

ïB.nc. Í l,321
HB.nc.Íl,321
IB.nc. Í lr 32l
IB.nc. Í l, 321

.!c. 32
I rBl .tf €. 32
IHB I .ge. 12
IHB I .!c. 32
I HBI .gc. t2
llrBl .gc. 32
I rBl .ge. 32
llrBl .!€. 32
.ge. t2
lwB
.!c.
32
ITB I
.gc.
32
IHB
.!ê.
32
IUB
lrrBl .ge. 32
.gê. 32
lwB
lrB .ge. 32
I TBI .ge. 32
ITB I

llote: ltrBl [lenotes the aagnlÈude of a 2rs conplenent nunber on IÍBUS<7 z g).
[lr32t lbnotes the Range of I thru 32.

326

ROt3tr ---> t tl
tg t <--- ROT 2 rl
ROt t tl ---> ! t2
t? ! ___> PRI FI'XCTIOil I
ROt5f, ---> t c3
a6 ! <___ ROt I rl
sEc Fuxcttox 3 L <--- t 0a
t5 ! ---> sEc Ftrerlor a L
DSIZETË --->t t5
ta ! ---> sEc FlmTtod 5 L
D SIZE I ll ---> t e6
t3 ! ___> SEC F|,I'C?IOX 2 L
PRt Dll|ctlox a L <---t a?
t2 ! ___> sEc FlrcTrox t L
nuxz Bl tl ---> t tt
tl ! ---> sEc Flrxcrrox I L
RO"'H ---> t r9
at! <___ OD CLT L
nuxz B, f, --->tlt ....... 39! ---> SHF FOS 2 L
sl|F POS I L <---t I I .
. 3t!---- GROutID
UGA ----lt2
. LrD . l7r---> sTAttrs I H
vcc ----r I 3 . lxlX. 36!---> stAttrs t rl

nuxz 83 tl --->tll
rtult E2 ll --->t!5 .......
sus t5 u --->t l6
rEus a2 H --->tl7
rBus a7 al --->t18
rBt s !3 ll --->tlg
nus ,a u ---> ! 2'
raus ,6 H --->t2l
mus ta ll ---> ! 22
sBus ,6 H <-->!21
sSus t5 H <--> t 2f

---- GROT'XD
3l!---> strF FOS a L

35 r

3t!___> SHF POS 3 L
32t ___> SHF FOS
L
3l t <__> saus aa 'rl

3ft < --> sBlrs c2 H
2gt <--> sEus t3 H
2gt <__> sBlrs 3l rl
27 ! <__> saus oo H
26! < --> s8us 0? H
25t <--- UBUS

SRX FIGUNE I

PIN CONFIGURATION DIÀGRAi ÀIID PIN IDEXTIFICATION

327

3.25

sEI"l ArD ROtA?Irc tuLrrpLErBR (sRr-85r3,

GTTINAL D3SCIIFIIC:

ns loglc to perforn nultiple bÍr
shlftlng varlablc lcngth u-rt f teld extractton, èonstant
gencrrtlon, end sotG blt-shuffling type operations
uecful ln erccutlng the VAX lnstrucÈion set.

328

sm IAILE I
Ptn ldcntlftcrtlon rnd Gttc fypc
I

lPIr I I prr rD
a2

l5
l6

l9
110

lrr
lrr

29
3a

32
33

36
37
39

112

lr3

lrr

lrs

1.6
l.r?

ft8

GATTIIG
I
I
I

LITOH
tDCL
IDIL

I
I

PRI FUI|CTION E L

l2r

GÀITTIG

SEC FUNCTION 4 L
SEC FUNCTION 3 L
PRI FUXCTION I L

sEroH
SB
H
SB16E
'1

GAITNG

LITSH
LIT I II

sB08Ë

22
23
2a
25
26

I GATE TTPt
?TPt I

SHF POS 4 L
SHF POS 3 L

lrs
lr6
lr7
lr8

l19
,20

C(NNEITS

GAITIIG
GAITI{G
GAITilG
GAITXG
GAI?NG
GAITNF

GAIn[F

GAIT]IG
GAIT1r|
GAITTN

SB12H

sEc Fu]{CTIOX I L
sEc FrrxcTtox 2 L
sDc Fur|cTloil c L

GAITTIG

GAITNG
GAITIIG

GAITZX
GAIT2 N

GAlTlltl

s8 2en
SB2IH
8828U
SB 32 H
18 0aL

GAITil

GAITTT{

GAITtr[

GAITTX
GATTIIH

n820L
ÍrB ot L
TB12L
t|8c8L
tlB f6 L

rf8 24 L
rf8 28 L

GAITXH
GÀITIIH
GAITXH
GAITTH
GÀITXII
GAITTH
GAITXH

P8ÀSE H

GAITTIG

RBC{L

I GAITPF
I GAITPF
GAITPP
GAITPF
GAITPF

RBOSL
'OL

R8 L2L

RB2II
'R8
t6 L
RB 2' L.
R8 28L
lrBUS 3I L
TBXXL
Furcrrox 5 L
stc
|

GATTPF

GAITPF
GAITPF
GAT?XG

GAITIrc
GATTXG

329

2.
2.1

Drrforurc. Lqutta..ntr

lntrrÍecer Input detr opcrrtcd on by thc SRI cht; s cole
Írot throc tourc.ts

À. tSus
B. nEUS

-C. tlTtRAL f told Íror thc llcrorcrd,
Drtr fror thr iBUS rnd tho f,BUS rrc lntcrnelly latchcd
<tgrlqg the f trtt hclf of thc c1rclc. ttrc clocl used ls
th. 'PHASE [. rlgntl. IhGn phógc n ls rt . tor lovcl,
lnput drtr tt fcd through th. l.tch. Àt thc rlrlng cdgc

of Pf,ÀSE H, tnput d.te tr rct.ln.d untll PBASE ll 9oe8
lou rgeln.
Rccultr fror thc SRn chlpa .rG output to thc SBUS of thc
CPIJ reln Dtta path.
For pln out rc.sonr, datc tnput,/output tolfror thc Snfi
chlps are l-uey tntcrleevcd such that cach chip contalns
onc blt of r ntbblc.

33r

2.2

Gblp I/O Srntrll: Prr lrbh 2. Eer prrr. 2.3
sRT ?A3LE 2

CEIP I/O sINÀTT DITA

tB <n> L

InPut

ï.tclnlCTL

rott

N/A

tl . 28, 2t', 20',
l6r 12o C8t ct''
co

RB (n) L

n . 28, 2lr 2et
l6, 12,' oBt cl,.

(Sce 2.3.2,

Lf? <n> ll

Input

r{/À

rBtrs 3l r

Input

N/À

PHASE ll

Input

x/A

PRI f\rnctton <n> L

lnput

)./^

SEC Functlon

Input

N/A

SËE POS (n) L

Input

../

SB (n) Ë

(lrtput

<n> L

^
(Scc 3.3.3. Itl

n.8,

a.e

tl ' Ir g
ttr5rlo3r
2t t, O
n . lt 3r 2
n . 32t 28, 21,
20, 16, 12,. e8,/

clt ee

ID (N) L
TEXTL

Input

)t/ A

Input

x/A

33r

tl 3 lr

2.3

'Pln ?uncttonr:

2.3. I

[

2.3.2

Rl (n) Lr Seac aa IrBUS Grccpt that data ts froa thc
fEiiF-Ttrc 'RB (n) L' ptns erè uscd es lnputs. pull up
-rcalatora are proylded by thc chtp 80 that unless the
data ts at a lou lcvcl, algnals on these plns .re pullcd
up to a hlgh lcvcl.
\
Llt <t, l, t> l: Ilrta lnput fron the llterel fleld of

2.3. t
2.3. I

2.3.5

<n> L: tte I fnput data fron the ltBUS. ttre t{B
ptns arc nacd as iB (28, 2tl.2t,l6, I2,lE,r4,rr> L. fnput

the r lcrouord .

lDlfB 3l_t:

.tr tnpuÈ aervea aa the sht f t-ln for the

E;TCI-6E!c shtfr ifgnt tBUs. funcrton (AsR r).
Ihcn PHASE tl r L. data frot the iBUS end the
PtlSt l:
EIIFTo lntcrnatly lrtehcd lnslde thc SRtr chipe. ïtege
tncludc thc S lnput datc froa thc trBUS and RBUS
.ilBUS<31>'
rctpectlvcly, thc 'lB XX' and thc slnglc
-

aata.

2.3.6

PRI (PRI ?|tqllC (l:l)

Llr Thc tro conrrol inpurs
y Íunccront tno nencc èrEo Ene
lntcrpretatlon of another group of plna, thc .SEC. plns.

PRI

B Ë,

ll, R
lri

EXTZ

ËL

EXtZ

Itsc.

2.3.7

PRITART FUXCIIOX IIAiE

Errz

R,R

Scc 2.3.7

thcec functÍone arc spcclftcd ln SRt Table 3.
^ll
thc clr control lnpuÈe, thc
83Cl Thesc !r.
T-lrterpretatlon of rtrtch dcpcnde on thc prhery functlon.
thcn the prtrary functlon lg of thc Ex?z typc, thc sÉc
plns and tho lD pÍns (2.3.9, spcclÍy tf r SBUS output
pln lr forccd to zcro, rcAardlcrc the vrluc of thc othcr
datc lnputr. S.. ERt Trblcr 3 end l. Írrs th. prlrary
functton epcclflrr ttSC, EEC<lz)> scrvc .r the rccondary
functlon control plnr. fio 16 rccondrry functÍonc rr.:

tl2

SEC<3: l>

SECONDART FUXCTIOII NAIIE

HHHI| (D

CLR T BTTE
CLR 2 BYTE

HnHL(I)

LO BTTE OFF
CLR 3 ETTE
ÀSL R

HHLH (2
HHLL (3)'
HLnH ({ }
HLHL (5'
HLLI (6
HLLL (7 'l
LHHtr (8 )
LHHL (9)
LHLH (lt)

cylPll

LLHH (I 2'

ASDI i

ASt r

LIT OXE
LI? IERO

FP FRACT
BCD STAP

rHLL(ll)

FP PACX

coxsTÀxT I
CVfIP
FP LtT

LLHL ( T 3'

LILH(l{)

LLLL(r5)

2.3.t

Ihe functlons arr. dcf tncd In ERt ?ablc 3.
FOS: Thc lntcrproÈltton of thGsG thrcc lnput ptns ts
ET-eo functton dopcndent. Rcfcr to SRt Tablc 3. por the
EXTZ functlonr, POS spcctfles thc rt.rttng
nlbble
posttlon of a blt Ílcld to bc ertractcds
P0s

STARTI}IG XTBBLE FOSITION

HHII
HHL
HLH

HLL

2
3

LHH

LHL
LLH

LLL

For the ASR tr functlon, pOS fp.clftca the nuaber of
poslttons to bc rhtftod rlght:
FOS

XIBELES !O BE SIITFTED

HHH

HHL
HLH

HLL
LHH

2
3

LHL

a
5

LLL

6
7

LII|

It3

llor thc ÀSt t rnd ASL R functlons, FOS epcclflcs thc
nrrber of porlttonr to br rhlÍtcd lcft:
FOS
IIIILIS TO IE SETFIED

aËf,
f,uL

u.u6

Ltrf,
tJL

f,LL

2.3.t

2.3.1,
2.3.11

8
5
3

LIJ
2
LLL
I
tlor tll other rohGtlonr, FOS lt not urcd.
lD (lrl) L: lto perforr tolc functlons tt lg nccosacry
FtTfctíEffy qhc .-ltce porltlon rtrtch e chtp ts hooted uó
to.
thlr le donc vlc tF tD plns, rhlch rtll ba
herdulrod to glvc crch of the SRI sllccs ! dtsttnct
ldcntlty. See ?ablcg SRt 3 end l.
8l (n) lr lhc nlnc output plne to thc SBUS.
Output pln SB<tlrtt> rrG trl-st.tG and the rctrlntng
ptnr totcr ltolc.
nf:tlA tAll,tr tfrc 19 functlong (3 tXfZ functlons plus
Tllffiiàery
functlonrl pcrforlcd-by thc sRt chtp lre
epeclfled ln Teblc fV, rhlch Grpr.as thc ouÈput fror
cech of the SE ptnr ln tcns of :
l.
funcÈlon nrc
2.
FOS (SBF FOS (l:2) Ll, uhcncver epplicablc
lnput dcta.
3.
lStatlong urcd ln thc Tablc rreg
tt - latchcd date fror Èhc lnput ptn tB t L,
Rl . letchcd data fror Èhc lnput pln RB I Ll
Ll r data fror the lnput pln LIT I H,
SBI .
output pln SB I ll,
a
Z
htgh lrlndancc stttG
ltxx . latchcd data fror thc lnput pln rB xx L
In addlÈlone tll condltlone vhÍch tnvolve thc ID ptns .re
alro rarkcd.

33r

sRr rrllt

?IrcTIOT TAELD
?unctton

FO8 |t sr32

Exrz rrR(tl
trHH

BHL
ULH

IILL

t[H

LtrL
LLH

ExTz r,r(ll

rl2
rl6

r20
n2a

r28

unu

ntt

HLII

IILL
LIIB
LHL
LLH

rca

rt8

nl2

rl6

Á2C

LLL

n2a
n28

IBH
trBt

Rtt
R"

BLB

Rf8

LtrB
LUL
LLH

Rl2
Rl6
R2'
R2l

LLL

R28

BtL

ÀsR t

ttSg

LLL
HHL

Extz RrR(I,

rt0
||r{

Hnn
BBL
HLf,

IILL
LËB
LUL
LLU

LLL

r3l
r3l
;3t
r3l
r3l
r3t
r3t

r3l

s!2t s!2t s!2t s!16 s!12 str! EEra s!t,
R28

rt!

rt{

l|rg

rl2
rt6

Á20

n2l
r28

rt,

rtl
r,E
rl2
rl6

R2a
R28

rrt
rrl

r!8

nl2

it6

n20

l|2l

r28

rrf
rcl

R2'
R2l

R20

R28

R2l

rr9
n3E

rl6

1rt2

t|t2

À2t

r2l

n28

rrt

À20
Á24

rl6

n2a

R28

R2a
R28

R2f
R2l

R'I

Rt,
Rtl

Rft

R'I

R'E
Rt2

Rl6
R2'
R2l

Á2t

r3l
r3l
r3l
r3l
r3l
r3l
r3l

nl2

Rtt

Rt8

Rl2
Rl6
4,20

À2a

n28

r3t

r3l
r3l
r3l
r|3t

i3l

R28

rtt
rtl

i9l

r0l
rtE
rl2
rt6

rr8

Rl6

R28

R'8
Rl2
Rl6

R2l
R28

Re8

Rl2
Rl6
R2t
R2l

nce

R28

tre8

r0l

rl6

r{12

r08

n2l

Á2C

trcl

Á2C

rl6

Àee

ril2
il6
n20
r2{

rtt

tr2l
i28

rt2

it8

r28
rec
nal

Rl2
Rl6
R2t

R'8
Rt2
Rl6

r2E

l|0l
rr8
Rt6

R2'
R2l

rtt
rtl

R28

R2{

R0t

Rtl

R28
Re0

Rl2

R2a
R28
R90

Rr8

RCI

rl2
rl6

ic8

R'E

r|l6

r3l
r3l
r3l
r3l

r3l
r3l
l|3l
r3l

335

R20

rr8

n20
À21
n28

t|3l

Rt2

Rl6

n2e

Á24
Á28

Rtl

n20

;24
r28
n3l

r3l
r3l

R20

rl2
rl5
n20
r2l
||28

r3t

r3l

Rol RcO
Rt8 ROl
Rt2 Rt8
Rl6 Rl2
R2' RI6
R2l R2e
R28 R2l
AOe R28
ief nog
icE icl
rl2 r98
||16 il2
n20 l{16
r2a n20
i28 n21

nce r28

R'I
R'8
Rt2
Rl6

R9E

REI
RC8

Rl2
Rl6

Rze
R2f R20
R28 R2l
Ret R28

rtf Aee
rOE Ííel
rl2 r08

il6 rl2
Á2C nl6
Á24 Á20
i28 A2l
r|3l A28

8rr

"rrt.t

t (cc"t

?truc tAtLt
3::Ii___ i_ :::_ _:::_ _:::__:::__:1_:: :_ :::_ _:::_ _:::
A6L T
trf,u
r,,
a
a
a
a
ae
oo
fxL
rtl r,, a
a
o
ca
oe
xt'f,
rrt rta ;ao a
a
oa
oo
trtt
rl2 rtt rrl rrt a
ao
oa
uu
rl6 rt2 rrt rtl ;ao oo
oc
ut.. I r2t
rl6 rl2 rtE raa Aaa o
0e
trJ I r2l n2a rl6 rt2 rr8 ict rco c9
LtL I r2t
r2l À2a rt6 rl2 rt8 Írtl rfg
_

ASL R

Itf, I Rt!

I Rrr
nLl| I Rrt
BLL
Rt2
XTL

LLL

||f,[
uf,L
uLrl

Lrr oxEltl

R28

Laa

a
a

L'I
L'8

LC8

LLL

R'I
Rtl

Rtt

HLH

LLU

RCI

LOa

LIIL

a
a
a

Ral

rnu
tr[L
LUH

a
a

RO8

BLLI I
Ln[| t
I.EL I
LLXI '
LLL
'o

IILL

Rtt
R'I
Rl2
Rt6
R2'
R2l

I nr6
I R2r
tL[ I n2r

LUtl
LBL

LTT ZERO

rtl
I
I
I
I
I

nf8

Laa

Lta
Lt8
a
o
o
a

I
L'I
LC8
I
I
I

Lao

Rl2
Rl6
R2t

ta,
Ltl
LOt
I
I
a

I
I
Leo
Ltl
L0c
I
I
I

Rt8
Rl2
Rt6
o
o
a

Laa
LGI

o
a
o

Rt8
Rl2
a

a
a
a

Lao

oo
oo
a3
oo
R09 e

RCt RoC
R'8 RC{
o
o
o
a

L08
c
o
o
o
o
LOC

rtE

L'I

o
3

Lt8

LOa
L0a

L08

Lta

I
I
I

I
I
I
I

I
t
I
I
I

L08

Lac

Lel
LC8

I
I

336

LO0

L0l
Le8

LOe

Lea
Le8

I
I
I
I
I

Lec

LCl

0c
0e
oe

co
ee
co
ce
R9c

Lea Loe

Lt8
e

ce
oo
ce
ce
LOO
Lea

Lt8

I
I

Lee

Lol
Le8

Lee
LC{
Le8

I
I
I
I
I

sRt trtrt 3 (cox?t
FI'XCTIOX TÀBLE

i:::g____r_i slt2

sE28 s!2a s!2t s!16 8!12 SDft stra sEfr

FP FNACT
8CD SAP
FP PTCT

nol ,^.19t
rof t t'Aoa
Á20 il6

cvlPx
CUTïP

FP tIT
coxsTArn 8

crx I BYrE
cÍx 3 BrlE

CLN 2 BTTE
LO BïTE OFF

xxx
xxx

xIx

xxx
xxx
xxx
xxx
xxx
xxx
xxx
xxx

n2a
e
e

c
o

g
e
e
e

Rl6 rt8
Rl6 R2a
e.0
ce
n28 i2l
t|28 r2l
r28 l|zl

i28

rl2
l|l2
R"

RCt
c
0

n20
n2c
c
o

i2a

ic8
rxx

il2

R08
e
0

rt6

il6
c
o

À2C il6
n20 l|t6
R'I R'C
RCa Á00
nl6 n24

R28

ACC
lor
f;t' to
rl2 it8 ó
;(21
e

ce
oc
go

oe
oe
zz

llOtriS: I . For all EXTZ functlons, the SB ouÈput plns aay aleo
bc forced to zero ea apccltlcd Ín Teblc V.
1o
Output le forccd to I tf ID.3.
3. qrtPut ts forccd to r tf ID.2.
l. Hhcn SEC FUXS?IOI a L.Lr cll outputs forccd Èo H.

337

R2l

r28 À2a
r28 e24
R00 roa
nco ic8

3r trlLt a
?lGtta ?Atlr
8r2f 8l2a
| 8132
tlta 5lt2 srtt sttt srrt <--st Ptt I
I
'|.2a
tE(tr f) t !2t, t2lr 321, t2t, t2lt t2t, 32lf 32ra 32lt (--lD<l: l)
Itiltt
lrl tt llrl tlll tlll llll ltll
lltl
lllf
ttrttL lrrlt lttl lrtl lrrr llll lllr tllt
llll
tllt llra
Itrrrr lrr l r llll llll lrll lllt lttl lltl tlll lrtr
{lxrtt l rll t lrll ltlt llrl lllr rlll lrll llll aaaa
Íf,xl,fx rllt lrll lllr rlll lllr llll ltlr rtlf aaaa
rrrut I rll r lltl ltlt lllt lllr lllr trlt ll,, oaaa
f,llLLtr frtrr lltt ttrl trlt lltl lllr lltl
raaa oaca
xf,rLrr lrrrt lttt lrll lltl llll lllt tlll aoaa aaoa
xf,rJtx
I lllr
llll
rlll llll tlll lllt aaaa aaao
tttJur lrrt
rll
I rtll llll
ltll lllr lllt lttl aoao aaal
I
rilJLB frllr llll llll lltl llrl trll tttt aaao aaao
fttJtr lrrrl lllt lllt tllt lllt lllt ,e0t aaoo aaaa
f,f,tLni lrllt llll rlll llll tlll llle
aaaa aoao aaoa
xf,rr^[r lrtlr llrl lltr tttt llll llrr aa03 aaaa oaaa
rrrl.Ltr lrlr r llll lllt llll llll latt ooaa aaaa aaaa
TtrTtLL ITIII llrl trll lltl lllt aaao aoaa aaaa aaaa
rt,xrx[ lrllt llll tlll rlll lltt aaaa aooa aaao oaoo
ut'xxBr frtrr llll tlll llll rltt aaaa oooa fttS aoao
TLBf,Lf, ITI I I llrl
tllt llll
lrrf acaa aaaa
aooa
at'f,xlr lrrrt lltl llll lllr aaaa oaao aaaa aaaa
ooaa aGoo
iÍ.lLf,tr ITT I T lltl trtt lllt aaaa aaaa aaaa aaaa aooo
trCuLËr lrlrl lltt lltt llfS aaao aaaa aaaa aoaa aaoe
lrl,uLLf, fxrrl llll
llll ltrt aaoa aaao aaaS aoaa a00a
BLrLrr lxllr llrt tlll aaaa aaaa aaao aaaa aooa eaoo
xLLtrËn lxtll lltt ltla aaao aaaa aaao aoaa aaaa oooa
ILLBnL lXttt llll tlf, aaaa aaaa aaao oaao JOOa OOaa
ltLtf,tt| lrrr I llll latt aaaa aaaa ooao aoga a00c oooo
trLLtrrt lrlll lrll oaaa aaaa aaaa aaaa oo'a Saac aatc
ËLTLUB lrtlr llla aaaa aaaa aaaa aaaa aooa 30aa aaac
[LuJr lrlll llta aaaa aaaa aaaa
aao' 0000 00oo
TLLLUT lXlll Itat aaaa aaaa ao'a aooo
'aoa oooe ocoe cogc
BLLLTL
f

lXrII aaaa aoaa aa00 aaoo oocO 9eee oo0. í00e

33E

snr TÀrLt a (co;n)
?IrcIIOT TAELE
18132 sr2t sr2a s!2t stl6 stl2 sttS sDta scfa <--sB Ptr I
8tC<5r f)

t2t, 32lr t2l, 32tt 32tt 321, 32ta 32t, 321,

LLf,Hf,II
LLIIBUL

xll0 laao aaoa oaaa aaaa aaao acoc ceoe oooe
xlrt aaaa aaoa aaaa aaaa aaaa aaoo oaoc cooc

LLilltLll

LLËIILL
LLTUIIL

tLLIItH
LLTLIIH
LLTLLB
LLTLLL

Othcrr

raaa aaaa aaaa aaaa aaaa aaao aooo aaae
xaaa

aaaa aaaa aaaa
xrr,
aaaa aaaa ooaa
xrfr
aaaa aaaa aaaa
TTT'
aaaa aaaa aaaa
xft, aaaa aaa0 aaao aaao
xrff ""
0c.a aoac oaao oaaa
IXXX IXXX xxxx xxxx xxxx
aaaa
aaoa
aaaa

aaoa ooaa oogo
aaaa aaco oaoc
aaao aaao aaee
aaaa oaaa aaoa
oaaa aaoe aaoa
aaa' 03ao ocoo

xxxx xxxx xxxx

<--fD<l: t)

caco
coae
aooo
a0ao
3000
oceo

oeee

xxxx

TABLE Y

llotttlon:

X . Don't care case
t r Forcc SBnn pln to lpv tor the
corrcsPondtng SEC and ID coarbi naÈ i ons .
g a Do not forcc SBnn typc pin to lou

iask off dcfinlons for the EXTZ functions.

339

SHFFOS2L--->tol
{g t <--- SEC FUXCTION 5t
tlTt<--- iExxL
SHFPOStL--->tO2
SHFFOS3L--->t03
t6 I <--- n8us 3l L
LtT I H --->tC{
a5t<--- RB28L
LIT H --->t05
la t <--- RB2CL
sEc FUNCTIOI{ |'l L --->te6
l3t<--- RBT6L
sEc PUI|CTIOI{ 3 L --->tC7
t2 t <--- R82'L
PRt FUt{CTIOlr I L --->tct
tl t <--- R812L
LtT e H --->re9
It t <--- RAOSL
tD c L --->rlc
39 | <--- RBOCL
rD I L --->tll
38 r ---- GROUXD
vGA ----t l2 .LID.
37 I <--- RBClL
vcc ----t I 3 . DfrN. 35t <--- PHASE H
PRt FTTNCTIOX e L --->tla
35t---- GROUND
sB t2 H <---r15
3l t <--- TB28L
sB 0g H <---!16
33t<--- ilB2aL
SEcFUNCTIOXtL--->tl7
32 r <--- i8t6L
sEcFuxcTtoN2L--->tt8
3l t <--- 18c8L
sEcFuxctroxeL--->!19
30 I <--- tB 12 L
s8 c0 H <---t2C
29 t <--- ]rBEIL
sB el H <---t2l
28 t <--- 1820L
sB 16 H <---122
27 t <--- rEecL
sB 20 H <---t23
26 t ---> s8 32 H
s8 2a H <---t2l
25t ---> SB28H
aaaaaaa
aa

o'a

aaaaaaa

SRTI FIGURE I

PIN CONFIGUR.ATION DIÀGR,N{ ÀND PIN IDENTIFICATION

34e

3.26
l.

?tttn (rcr,
crtnÀL D3scntPttor:
9r..rrblc tlncr. Ttle inttial count
Ytluc te hcld ln a rcglster
crllcd IllIR. Tàc counter ls
a rcglstcr callcd llCR. ttrcrc ts . control and st.tus
rcÍtlster cal,lcd I]CSR. All rcglstcrs rrG accessed f roa
the rBus undcr the control of thc lnputs rc?RL (5:c) H.

3rt

tpt tAlLt r
PÍn ldrntlÍlcrtlon rrÉ Grte tyP.

ciltr"s
2
3

5
6
7

I
9
l,
ll
ll

t5
l6

L7
20
2L
22

2t
2a

23
26

2?
2g

32
33

36
39

tc
al
t2
t3
{5
l6
1?

GATE TIPI

FUS t9 [
I rBts 23 n
I EUS 2l n
I ?INER SERVTCE H
I rBus 3l tl
mus l8 [
raus 2a H
HBI'S 17 H
PROC INI? L
TINER IIIT L
rBus 22 n
wBts 2t I
rBus l5 ll
BCLTL
D CLT EXABLE H
HCTRL 3 H
HETRL I B
TCTRL I H
HCTRT 5 H
TrcTRt E H
TCTRT 2 H
wBus eg H
mus c3 H
wBus tl H
mus 02 u
ï8US Ol H
rBus 35 E

GAI?ZF
GAI?ZF

GAI"ZF
GAITIF
GAI"ZF
GAITZF
GÀI?ZF
GAITZF
GAIllTF

GrflrTH
Gf,ITZF
GÀI?ZF
GÀI?ZF
GAIT]IF
GÀIt1TF

GAIT]IF
GÀITIIF
GAIT}IH
GÀITIIH
GAITNF
GÀI?IIF
GAITZF
GAITZF
GÀITZF
GAITZF
GÀITZF
GATTZF

rBus ,6 H
rBus a7 rl
wBts t9 H

I
I
I

mus t8 B

uBns t0 H
IBUS II H
wBus 13 ll

I USEC CLX H

wBus ll

HEUS 15 H

rEus t2 H

312

GÀITZF
GAITZF
GAITZF
GAITZF
GAITZF
GÀITZF
GAITZF
GÀITZF
GÀITZF
GAITZF
GAITZF

Prrforrence tequl rctcnts :
CLOCKS: Tlrree clock slgnals are input to TOK:

2.1

2.2

2.3

l. B CLX L - Reeetved Only.
2. D CLlt EXABLE H - Recelved Only.
3. USEC CLI( H - Trl-state Transcelver.
If I USEC CLX Etf H - O,
then I USEC CLT H . REC CLK L
tf I USEC CLr Eil H . l,
then I USEC CLi H ts uscd
only as an tnput (drtver high tapedence)
D CLI L:
Ànother clock slgnal, D CLt( L. is generated
lntcrnally fron B CLf L and D CtK ENÀBLE H, yherc:
D CLi L - 8 CLi L + D CLK EIIABLE L.
REC CLf, E, Dtf Cq! I B, DLï CLt 2 f,:
Three
cdge
trlggcred D flÍpflope rrc uscd ln generatlng tNC CLK Í,
REC CLf B, DLï CLf I H, DLI CLX 2 H. Ttrese operate .s a
functlon of I USEC CLf EN L. Each of thcse rre clocked
on thc rtstog edgc of B CLX L.
If I USEC CLf Et| Ë . l, then
REC CLX B <- I USEC CLr H
DLr CLX I n <- REC Ctr I
DLT CLT 2 H <- DLï CLT I tr
lf I USEC CLI EI H r lo then
REC CLi ll, DtI CLI I H, DtI CLf 2 H forn r dÍvtde by
elghÈ count.r. REC CLtr ll ls the lcest rlgnlf Ícant blt.
DLf CLI 2 H tc tho rort rlgnÍflcant bÍt.
tIG CLI Xr IXC CLf H lr thc output of an edge trlggered
D fltpflop clockcd on thc rlelng cdge of I CLK L.
INC CLT B <- SET.IIXG SC L t SETTING TL
. ÍSC H + tll + Rtfll H . REC CLI( H I
DLICLrls.DtrCLX2Ll
shcrc

-.XOT. (ïBUS 2l H t D CLI( EXABLE H
. (WCTRL (5:e) H . t8l )
SETTIXG T L r .XOT. (ïBUS 2e 8. D CLI( ENABLE H
. (ICTRt <5:e) I + ,8, )
SETTIIfG SC |

3t3

rrrn (t5:t) B: rlttR ls a 16 btt rêg tstGr. tt ls rnade
of tranaparcnt latches.

2.4

To load INIR,

tf D CLK H. (ïCTRL (5:C) H r eA) (lê. rhe latch ls
opcnl
Èhcn ttflR <15:e> n <- IBUS (15:e) H.
Iro rcad INIR.
lf WC?Rt (5:0) ll r tE,
thcn I|AUS <15:l) H r INIR <15:0) H.

2.5

lltrr Cont,rol rnd st.tu. hegtrtrr (tCSRt: T h I s
rcgister contalnl l, bltc. Ttcgc bltt lncludc atrtua
lnfonatton end control functlons. Ihcn ICTRL (5:e) H !
!F, $CSR (3lr2l:16) lg rerd out onto mUS <3lr2a:16) H.
Ihcn ïCTRL (5:t) f, - 08, TCSR (3112{:16> tc yrlttcn frol
(3lr2l:16)
f8us

n ag dcrcrlbcd bclor.

/l
+---+/ | /--+---t---t---t---*---r---r---*---r---r

tttftttl
rlrlrlslrlslrlvln
Ylnlelcl
tRlntPl

tpt

| | /l
| | .l | | | | | | |
+---+/ | /--+---r---r---a---i---*---o---r---r---a
3t

2a 23 22 2L 20 19 lE l?

BTT IÀTE
ERROR (8,
3l

'2'
2t
22

FUIíCTIOX

thlr blt ls ..t uh.ni
(llthcre lr e corry out of ltCR<ts>
end SR tr rct.
(2)tlrorc l.r a c.rry out of IICR<IS>
ulth YP and fR rct.
It lr clcorcd by rrltlng ! onC to TCSR
<31> tlth thc lov pulac of D Ctt( L.

?RAI6FER OYERFLd

PEIDTIG (TVP,

tttr blt lr loadcd fror HBUS<2a> H
rlth thc lou pulec of D CLf L.
uh.n thrrc lr r crrry
II?ERRUPI RE0UEE? (tR1 filr blt lr..t
out of IICR<Is> and YP lr ret. tt
lr clcered by rrlttng . on. to TCSR
<2t> vlth the lou pulrc oÍ D CLt( L.
ttÍr blt lt lorded Íror mUS <22> ll,
IItERnUPt EIABLE (lE!
vlth the lor pulre oÍ D CtX L.

3lf

sllfc?.B CLOCX (SC)

TRAXSPER (")

tftls blt ls loadcd fror WBUS <21> H
rlth thc lor pulse of D CLi t SC is
arynchronouely clearcd rlth the
hlgh pulrc of B CLr L tf IxC CLr( H
u.3 8ct ulth thc rlslng-edgc
-l - of
ÈheÈ Pullc.
Irttlng . onG to thls blt rlll crusc
thc IICR to bc loedcd vlÈh rhe
valuc contrlnGd tn thc [XIR. T Íg
en edgc trlggercd D fllpÍlop.
It
ls loadcd fror mUS <2a> H ulrh the
rlslng cdge of D CLtr L. IÈ ls
clcarcd rtth thc rlelng cdgc of B

clr L lf rxc cLtr lt.

SERYICE RIQUES? (SR'

Thls btt lg cct yhcn thcrc ls a crrry
out of IICR<IS) unlces VP tt 8Gt.
It ls clcercd by urltlng a onc to
!CSR<19> ulth thc lou pulse of D
CLX L.

TRÀTSFER REQUEST (TRt

tfile blt ls sct uhcn therc ls a c.rry
out of IICR<IS) and VP ta sct and
?YP le clear. lt ls also sct uhen
T ls bclng loadcd uÍth r onc. It
tr clcercd by rrltlng a onc to
!CsR<18) ylth thc lor pulsc of D
CLf, L.

ttlr blÈ ls act by urlÈtng r one to
trCSR<I?> ulth thc lor pulsc of D
CLf L. It ts not affectcd by
urltlng r I to thls blt. It ls
loadcd fror tVP rlth thc lor pulsc
of D Ct.f L rhen T lg bctng loedcd
rlth c onc. It lr elcercd vhcn
thrrc la a clrry out of IICR <15>
lf YP lr sct rnd TYP le elcar.
Rr,rr (Rl
tfrts blt lc loaded fror mUS<16> ll
l6
rlth thc lou pulec of D CLf L.
IICR: IICR <15:0> lc a 16 blt synchronlus loadable
2.6
countcr. It ls clocked vlth the rlstng edgc of INC CtK
l7

oYERFL(n PEXDITG (YPl

tf T H + (IICR (lssC) . FFFFI . VP H,
then IICR <15:00)
othcrrlrc, IICR (15:C) ls lncrerented by l.
If fCtRL (5:e) H. C?, IICR (15:3) ls read out onto I{BUS

(15:r> U.

315

2.7

tlrtn sttvlcr t: TITER SERVICE H lg Èhe output of an
.dgc trlggcrcd D fl lpflop ctockcd on thc rlslng edgc of
D CT'tr L.

TITER SERVICE Ë<-SRll+TRlt.

2.t

IITIN IIT L:
TIiER IXT L ls the lor truG dutput of an
rdge trlggcrcà D fllpflop, clockcd on rhe rl3tng cdgc of
D CLf, L.

IRH'IEE.
PROC IIIT L:
If PR(rc INIT L ls lou, all blts of the
IICSR and thc TIiER llrT f I tptlop .rG asynchronourly
TITER IXT H

2.9

clcarcd.

//r

ta6

I USEC Ctr EX L <-->trl
aEt<--> IBts t2 B
rDus 19 B <-->t32
t?t<--> rSus 15 H
lÍBfE 23 A <-->tr3
a6t<--> r8us lf I
rBu6 21 lt <-->ttJ
tsr<--> I usEc cLr
TtiER SERYTCE [ <-->tt5
aat
Fus 3l H <-->tt6
t3t<--> rEus 13 H
rBus l8 H <-->'rf7
t2r<--> rBus ll H
r8us 2a a <-->ttg
al r<--> rBus It a
IErrs l7 H <-->tfg
atr<--> rBts tt n
PROC IXIT L --->tl' ...o..o 3gt<--> raus tg B
TITER IXT L <-->tll .
o 3gt---- cRoutrD
vGA ----ll2 . LrD . 37t
vcc ----t 13 . mr. 36t<--> rBus t7 tr
mus 22 B <-->tla .
. 35t---- GROt'|fD
r8us 2l ll <-->tts ....... 3lt<--> rglls t6 H
r8us 16 lt <-->tl6
33t<--> FUs t5 H
B CLr L, --->tl?
32t<--> rBus ca ll
tlE
3lt<--> rSus 02 a
rl9
3rr
,

D CLi EXABLE H ---> t 2,
TCTRT 3 H --->t2l
TCTRT I H ---> 122

29t<--> HAUS 0lH
28t<--> IBUS t3H
27t<--> rDus oca
26t<--- rcTRL 2H

HCTRL { H --->t23
TCTRT 5 H ---> t 2l

25t<--- ICTRL 0ll

.llotr FIGURE I

.PIII COXFIGURATION DIAGRÀN ÀND PIN IDENTTFICATIOI

3f?

t.27
t.

[rlc ccfDr íttl E att
ccrS Elt?ttcr
lhlr tP.clÍlcrtlon óellno th. d.È.ll requtrc.nts Íor
tho V^t-ll/?Sf ltrlbu. td.pror.

rrrclgrllJ lgs

ffi

Dlcltrt Equllr.nt Corporrtlon
A-PS-t9rrrt3-GS

rrl Rrrchrrc Qpectf lcrtlon
lor A att fntornrl Grte'
lor-Porrr Schottty ïpe , Glte
Arrry lnt.gr.t.d clrcult
E 6t,

Ge ne

Errler

3rt

trcr ?ÀtLt I
Pln ldonttflcrtlon erÉ Grtr lyD.
TO. ID

cotrExTs

2 tEÏÏ B
3 CERA | [
I cSRl ll I
5 ADU' f,
6 ÀDE I
7 DLGT AR8 L
E CI B
9 [rGBESr L
l, lnA 2 L loar2|1r
vu
ll tAïlcB I
la BUF Cf,l 28 H
15 c, B
16 tnÀ 3 L loar2lra
VU
I? AI I
18 AI Ë
19 BUt I f,
2a EUT 2 U
2l unl , L t^..21a
22 Blr? CnI 27 á23 gcl lt
21 BUF CTI 26 A

XO. ID
GÀITXF 26 Sq' n

c(nrExTs

cAltïc 2? oÉaL r r
cÀlrrc 28 DPSTL I H
GÀIIïF 29 TAP CTRL EX L
cAttïa tf csRA 2 u
GAITTil !I 8 CLi L
GÀITZF
CSRÀ 3 tr
GÀlilF t3
'2 BUr t I
cÀl3gx !l 3UF CnI 25.F
cÀllzF 36 txt a
GÀI"ZF t7 trRA I L l^,.2ha
GATTZF 39 BUF Cf,r 3t HcAlTCx ll BUF Crt 29 n
GAITZF IT BUF CNI 8
GÀITZF
IXIT r '
cAltï? t3
'2 sstï n
GÀl?I? ll STÀTUE lL l^,.2trr
GÀlTcï t5 sTA?tJS tL lrï.2rc
cÀltzF t6 EBt L
lli.2ha
cAlTtx t7 Trtout B r'&
GÀITZF I8 PT I

3{9

GATE
TTPE

GAlTtr
cAtïzD
cAltzF
GÀITTT

cAlrrc
GAIITF

GA!"XG

cÀttr?

q ITZD
cÀtIili
c lfCx
chtrzp
cAlr2p

GAITZF
GAITXF

cAlrrF

cAltCE
cÀlï\cF
GAITCD

cAltxF
GÀTIZF

Prrfortrnco s

2.1

Convontlon! s

ttrlr functlonal dcscrlption lales use of internal atrte
clcrcnta and lnÈernal slgnals to sirpllfy-noted
aore of the
dctallg. Àll intcrnal clgnal nares .rG
by thc
fact thrt they end wtÈh e pcrlod. ÀD lndcr ts pro.-vtded
tt the end of tho sectlon to assist ln findtng the
dcftnltlon.
ttrc t ls used to reprcscnt a log leal .AlfD. , thc + for
log lcal 'OR' .
Àll aqurtlons asst'rc posttlve log lc, a
loglcal onG ls htgh. slgnal nàrcs uithout a postfixed
aescrtlon lctter .ra htgh true. Ao ,L. aftcr-a signal
nalG lndlcatcs a lor truc llgcrtton. tf an tnput pin ls
Iabeled as NAttE L, thcn the follorlng holds truc:
lavel on lnput pln
Nuc
Nale L
L

Certatn output plns .rG lor Èrue assertcd. For BolG of
these thc descrlptlon actually dcftnes thc cotplcrcnt of
thc pln.

Iost strte clelcnts arc cloelcd baccd on thc lnput pln
BCLI L. Unlcss steted ethcrrlsc, cdgc trlggcrcd dcvtccs
changc staÈc on Èhc rlstng cdge of ECLi L. and Ect-rcsat
dcvlccs have thc set and clcar condttlons Àtrllbd rlth
BCLtr II.

Certaln input pins arc deftncd as havtng 'Sker [átches'.
tlrcge arc fecd through lrtchcs thrt ere open uhcn BCLK L
ts hlgh and closed uhcn BCLI L goes lou.
2.2

2.2.1

Intcrnrl Strtc:
Bllt ltÀG8:
tCX conttlna 15 SET-RESEt fllpflops called bytc flags.
tlrcge rrc orgtnlzeó ag thrce groups of 5 blts pcr grouP.
llrc groups .re assocleÈed rlth thc threc buffcrcd data
plthr and r group lr sclcctcd by thc valuc cf DPSEL I H
and DPSDL a ll. tte groupr erc nrrbcrcd I through 3.
Hhcn thcsc tuo llncr havc thc valuc O0 thcn no stctc ls
changed rlthln thcsc bltc. thc outputs .rc eclccted by
e ruttlpleror controllcd by thc DPSEL llncg. Ihcn theee
llncr havc thc value ga the output of thc rulÈlplerer
hac thc valuc a.

ttrc flvc blÈs trc labelled 8F3r BE2, BFlr EFe, and CD.
tfic outPuts of Èhe rultÍplcxer rlll be rcfcrrcd to as
350

8F3., 8F2., etc. A set of slgnals lnour as BltX. is
used throughout this spec. Írcy arc def tncd ar follous.
if : (BUf?LC / ll[H) t (PURGE EVENT L. T CI L T IXT L'
_7 then BhX. ! I
else if:
DPC. . I
thcn BllX. r functlon of Àlr Ae, Cl, CCo offsct such
thrt lf Table I has an ), BILX. r l, othcrrtsc C. For
thls crsG BFOX. ulll also cqual f lf BUT2le. LHH.

else:

8lIX. . BFn.
Ihcn BUT2, BUTI, BUT, - HLH, then CD ls cleared and the
BF blts àre sct rs r functlon of Alr AC, Cet and OFFSET
as dcscrÍbcd by Scction 2.5.t.
llhen BUt2, 8UTl, "8llft . Lf,Ë, then BFe ls sct.
llhen SIATUS TfËE. . llr thcn BF3 - BFe are cleared and CD
ls clcarcd tf cl L . L or PURGD sEL l. r H or PURGE sEL
C.. H. lf lt ls not clcared, thcn tt ls set.
It{lT H . H clcarg all bltc lndcpcndcnt of Ëhc state of
BCLK or DPSEL.

Ihenevcr .

2.2.2

PURGE REQ fltpflop ls clcrred (see Sectlon
l.12), thc corrctpondlng CD ls clcarcd.
STÀTUS TtnE. lr dctlnod ln Scetton l. lg.
ERnOn lltg - tfcl, tltr
ïtrc .rror bltr conrtrt of 3 groups of 2 btÈs (SET/RESET
fltpflop) oech. tfrc rrlcction br the groups foi both
clock_lng lnd rmdout lt controllcd by tnC OpSUf llncs or
tho csRA3, csRA2 llnrt.
ttc groups arc nurbcrcd I
through 3 end .rG gelcctcd by thc cgulvalenÈ valuct on
thc DpsEL or csRA lln[.
rhcn ÈhG rpproprlatc llnes
have thc vrlue aa thcn no change ln rlatc occurs on
scttlng/cloatln'a end thc outputs of thG aclcctlon iux

havo thc valuc i,rjj e .

utri ls cet uhcn sTATus rrtE. . H and srATus I, srÀTus o
. LL. Selcctlon of group ts controllcd by DPS-EL.
Nn Ía clearcd rhen ct.r csR 93. . H and BuF cir 3c - H.
Sclcctlon ls conÈrollcd by CSRA l,Z.
tcE is act uhcn srÀ"us rItE. . H and srATUs l, c - LH.
DPSEL eclccte.

35r

trcE lr

cl..r.d rlren cLr csR 83. r H and BuF crr 29 r lt.

CSRA 3r 2 rlect3.

2.2.3

Àll rh bltr .r. clcercd rtrcn IIIT r ll, lndcpcndcnt of
lcll.
cLt cER Et. r csRA ll L 3 csRA I L 3 SST I l|. I SSt 0 L.
I lttrcl Cf,t 3l B.
Itrrrc rrr threc ouÈputs Íror Èhc tF blts.
DP IXn. . IIt 3cl.ct.d by DpsEL
REG In. . llE re lcctrd by CSRÀ 3.2
RBG IJCE. r UCD rclcctrd by CSRA 3r2.
tt!C[ Cf,l <31r25)r
ttrcec .rc 7 tatchcs ulrosc tnputs lrc BUF CtI (31 : 25).
tfre lctehcs lrc opcn uhcn DABZ L ! L. and PREY D882. .
L.

2.2.4

DAIIP SIO E:

2.2.t

tfilr lr e SEt-RESET fllpÍtop. It ls sct vlren Cl . L, Ce
r Hr DPSEL lrt . )O, 8UT 2rlre r Hl|H, thd ISnt r H.
IÈ lg cleercd vlren Cl ' H, STATUS ?IIE. . H, PURGE SEL.
lr, . aa. lt le elro clcrrcd uhcn INII a H, tndependent
of ECLÍ.
88l.2rlrfr
tfrcrc thrcc cdgc trlggcrcd D fllpflops fora a sequentlal
rechlno thrt control varlous functlons lnsldc thc
dcvlcc. SSl2. ls clearcd by INIT lndcpcndcnt of BCLK.
Dcflnltlon of D lnputr:
CSrl ADDR. t BUF CII 27 L + CSRA ll t CSRA { s SST2.
SST 2:

t ssTl.

SSt l:

CSR ÀDDR. e (CSRA ll

+ CSRA a Ll t SST 2. t SST l.

SST

CSR ADDR. t BUF CiI

27 L + SST 2.

ADÍf I DBBZ ll t
8UF Orr 26 Ll

PREV DBBZ L. 0 (BUF ClrI 27 L +

CSR ÀDDR. '

2.2.6

lÀlCtr ADDII:
T.ATCH ADDU

ls:

ls an cdge trlggercd D fltpflop.

352

lts D lnput

2.2.?

2.2.4

2.2.9

AE 3 Dtt i I tnty Dlz L. I (ttr cnt 2t L + Bt[ c;r
2a Ll + IAICI ADt . I AStr L c ttr OUt t
It lr clrtrod by lftl r lt tndcpelÉont of lGLf,.
ntïl LO3 Cltt r
tblr lr rn odge trtggcred D flipflop. rrr D tnput lr:
IttrCt ADU. + DntyE tlUS CtnL. I tStI H.
[tYt Ër o
filr lr . 6??-ttEE? Íl Íptlop. It lr rcr ràcn str.tns
?llt. . A. E?Attrg trt. Lï. It lr clerrod by tslï r Lr
tlÉopondrnt oÍ tCLt.
tffU Dlt I
thlr lr .n odgc trtggcrcd D fltpflop rlrorc D lnput ls
Dtlz.

2.2.\a

Clt CItLt r
thlr lr rn odgc trlggcred D fltptlop. Its D lnput is:
(lut 2rlrO I IXI 3 lllGBES? 3 DOBZ t t CNI CïCLE. 3 DBBZ
[ 3 trl? t..
S?AtlrS ttlD. r Ctl CICLE. I DBBZ L.

2. 2. I I

CtI l$flDs
thlr lr rn odgc trlggcred D fl lpflop.

Its D input ls:

(tu? cnr 27 L 3 ADDR XO TV. tCtl23H+

crt LoctED e lxIT t . (ADDR XO ty. r BUF crt 27 r 8uF
cf,t 25'

ADn IO lty. . DB82 H I PREY DBBZ L r (BUF CiI 27 L + BUF

2.2.12

crt 26 Ll .
CSI ilnct n30 te2rlr
tlroro threc SET-RESDI fl lpflops rrc sclected to bc set
rnd clcrrcd by CSRA 312 rnd DPSET lrfr rcspectlvely.
A glven onc lr sct ràGn sclcctcd by CSR,À3'2 and CSRÀll Lr CSRAI . L. SSTI. - H, SS?t. r L. I.ATCH CII 28. r H,
llrPCïlarll.
rÈ le clcrrcd rhcn sclccteo by DpsEL and the followlng
condltlon lt truc:

353

(81" zta . Lt.f o I()t Erp?ï. L, + pl,tRGE EVEXT. r CiI
CI|CLE. t DBZ L.
I(yf DtP'fI. . tF3I. + EF2I. + BFII. + BFIX.
PIIGE EYEff. is dcf lnod in Scctlon 2.2.13.
Àll threc bÍtr .r€ clcared by IXII 3 ll independent oÍ
DCLr.

tsn rlncE REQ. - csR PURGE nEez. + csR PttRGE nEel. + csR
PtnGE RtO

2.2.13

'.
?nct EEL lrf :
tlrcrc tuo btts do not tollor thc clocting convGntions
dcrcr tbcd [n thc bcg lnnlng of thls rcctlon.
ltrcy .re
sct rhcn thc set conditions bclov arc rct rnd BC[f L is
lou. tfrcy rrc clearcd on the rlslng edge or BCLI L uhen
thc clcar condlttonr .rG lGt.
PURGE SEL I.
SET: DPSET I I SET PURGE. + (PURGE REQ2. + PURGE REQ3.)
t (8[ff2' l'a ' l|ln, .
CLEAR: StAtUS TIIE. + (BUt2,t,O. LLH,'s NOT EilPtY L.
PI.'RGE SEL

SET: DPSEL O T SET PURGE.+(PURGE REQ3.+(PURGE REQZ L. t
REQI.) t (BUT 2rLoO r trlt[).

PURGE

CLEÀR: SÀiE AS PURGE SEt l.
SET PURGE. . (BUT 2,113 - f,Hf,) t
REQ L e rOT EnpTI. t

isY'll t DP NEr L r CSR PURGE
Dpt L. r (Cl L + iÀtrCH L + cl I c, s Àl

t Àt 3 oFFsEt).
PURGF EI'ENT. . PURGE SEL I. + PURGE SEL
'.
2.3
lnput Arly Plnr:
rnput prng vlll only bc dcscrlbcd tn gcncral tcrrs in
thls sectton. The prcclsc use of tnputC ulll be dcflned
throughout the sPGc vhcn thcy are uscd Èo dcftne outputs
or tnternal statc elcrents.
2.3.1
ÀDDC B
Tttis line ts used Èo indicate that àn address on the CnI
ls in Unibus CSR space.

35a

2.3.2

ADDII [:

2.3.3

lttlt llnc ls uaed to indlcaÈe an address on the clrl Èhat
lr ln Unlbus Àddrcsg 8pacG.
ltft Ë (tt t2, tuTl, BltTll :

2.3. a

ttrcre llncc control the crocklng of the byte
flags,
purgc SEL rcaleÈcrs, and CtI cyclè flip flop. - Ttrey
alsó
control thc t|RA output lines.
cgRA 2o 3r I, ll E:
r|rcec lÍncs correspond to cir address lincs of the sane
nurbor. llrcy rrG uscd to sclcct bctreen the ltap and
CSRtt, end also to sclect uhich CSR.
csRll csR{ csR3 CSR2

lxx
3cx
clx
2.3.5

x
x

nÀP

csRfs
RESERVED

f,IGBTSI L:

ftttc llnc lndlcatcs thrt Èhe uBI is .;
dovlcc erbltrettng for the Clt.
2. 3.6

htghesr prroriry

IIII Ë:
ttle ltnc initializes nost stàte elenents ytthin the

dcv lcc .

2.3.7

IIT E:
Ttrls ltne cores frol a synchronized verslon of Unlbus
INTR.

2.3.8

rSt'r !:
A synchronizcd vêrslon of Unibus ltSyN.

2. 3.9

88II f,:
A slmchronizcd verston of Unibus SSYN.

2.3. l'

TITOUI B:

2.1

tfilt llnc lndlcatcs thet the UBI tiaed out raitÍng for à
SSïN on thc Unlbus.
Output (Irly Ptnr:

355

2. {.1

ILOCT ARE L:
BLOCK ARB L -

2.1.2

CIII LOCXED. I DPO. T cI II cc t BuT o L

TAP CTRL EX L:

iÀP CTRL EN L - SSTI L.I SSTC. + PURGE EVEXT.T SST9 L.

+ iNT

scl, sGf:

2.1.3

SCtHTSSTIL.
SCO H . SST0.
I

unA (3, 2. l,

2. l. l.

tt L. oPlr coLLECtOR:
Ttesc llncs.re used to control the uBr atcro-code.
Itey are Íntended to be ylrc-ored ulth the nÍcro-code
address llnes. Ítrcy are controlted by the BUT ltnes
plus other signals aJ Oef ined in tfCN Tabies 3 and {.
Bldlr.ctloncl Plnr:
Àt, Al, cJc cl:
firese four plns are al I trt-stàte. ïtrc trt-"t"t"
enable

2.5
2.5. I

is:

DRIVE UBUS CTRL.

AO I

c0 r

IÀTCII CiI 29 L. r I.llTC8 Ct| I Zg L.
LÀTctt clrr 30 L. t LrrcH cllr 2E L. t t.ÀrcH ctr 27 H.

LATCH ClíI 2? H.
ct . AC. + LÀTCH CltI 25. t LATCH Cit 27 L. +
tÀTcH cilI 27 L. t t.ATtH cil 26 H. +
IIÀTCH Crl 3l L. r uÀTCH CltI 29 L. r LÀ?CH ClrI 27 H.
2.5.2
lU? ctl (3lr25r l):

Ttcse S lines erc tri-state.

Ttre trl-state enable is:

SSTI L. c'SST0 H. + SST0 H. t CSR II L +
C}TI CTCLE.I PREV IEBZ L. +
(BUT 210' . Utx) f (pREv D8BZ. + DEBZ L)
8UF CTII 3T H r BD3X. + SSTI t (REG Nrr + REG rcE)
8U? CtI 30 H . BF2X. + SSTI r REG l|Xfi
8UF CiI 29 H . BEIX. + SSTI t REG IrcE
8UF Cf,I 28 H . BF!X.

8uF ctr 27 ]l . (PURGE EvElrr. + cl L + INT) r ssr e L.
8UF CIII 26 H . PURGE EVEXT L. T IIIT S SSTb L.
8uF cilr 25 H r DATtp sEe. r PURGE EVENT L. r ssl0 L.

EUFOtIeH-ptncEREe.

356

2.5.3

DBBZ L:

t|tls ls an opcn collecÈor pin. DÈBz is recelved through
. slcu latch and lt ls thts rrtched DBBZ thaÈ is
actually uscd thoughout thls Bpeclfication. Oo output:
D88Z H .
[-àTCH ADDU. + SST2. +
ctII CICLE. T PREV DBEZ L.
2.5. I

DPSEL IET H:

llresc tuo I lncs are Èrl-stete. ttre trt-state cnable is:
SSTI L. T SSTO. + PURGE EVENT.S SS?O L. + IXT
DISEL l . CSRA3 s PURGE EVEI|T L. + PURGE SELI.
DPSEL O . CSM2 I PURGE EVENT L. + PURGE sELe.

2.5.5

TAITCB E:

Ttrls ls a tr l-state pi n . Ttre enable ls: 8UT2le . LHX.

IIATCH H r HIGHEST t.

2.5.6

6OFFEIT B:

Ttrls is an open collector pin.
OFFSET H !

2.5.7

2.5.8

INT L.

PE:

Ttrts ls a tri-staÈe pln. Ttre enable is:
CI L t !|SYN S DRIVE I'BUS CTRL L.
PDH.DRIVEPB.
STA?US lrf L:
'these tre trp opan collcc-tgr plns. ttrey are recclved
through skcy latchcs andr lt ls the output of thêsc
latches Èhat are uscd throughout Èhls spcclficatlon.
H ! SSTI. + SSTC. + PB L I DRTVE UEUS CTRL. E
ssïl| e l|srl|
STA?US O H a SSTI + SST,. + DRI\,E UBUS CTRL. Í SSyN r
STA?US I
t|sYN.

357

UCI TAILE 2

s?TTIIG O? BrlE ?!.AGE

c, Àl
t L
t L
t ll

OFFSE?

D?3

B?2

8Fl

B?O

r tleans blt ls set, blank neans no change.

358

lrcr tttLt 3
rrA ou"Ptrts

trrt ltr? lut
2lr
LtL
LLtl
Lït
LIu
||Lt
lrLtl
I
.lr
HTH

unAtt

UNA2L UNAIL

Iltll
H
H
II

B
B

rR P.

iSïX L
tslx L
TSTX L

rsnr L
tslx L
E8Z

URAIT
ENPtï PTNGE L.

l|tcltEst s DBEZ L
HIGAESI r ËBZ L
?ttour L s ssï1r L
TITOUI L r SSIÏ L

STATUS lL s S?À?us cL

--sEE trcx ttaLE {-------

InÀP. . Al e OFFSET s (ClL+CgL)

359

cr ttlLt a

tttl OUIPUIS ?OR !t

"2tf

. ttt

r DPtL.t FF lrBUS. t AUIIO pfncE L.
I'RÀ 2 ! r DPTL.I FF I'BUS. I DATOB TRAP L. +
It$c[ ADDU. +
FF I'BI'S. 3 CI T AI'IO PURGE L. I DAIOB HRÀP L.
UnAlL. LATtC[ADDtr+
DPOL.3 Cl L. 3 Ctr tAl\Clt +
DP'L.T CI H 3 FULL.3 DATOE TRAP L. +
UR^ 3 t

PURGE.

URA O L -

DPt.e FP UBUS.I Cl +

lÀltCll ADDU. I I.ATCB CII 27. +
DP'L.3 CI L.T INAP. t COS FF UBUS. +
II{T t PURGE EYEX? L.

DPC.r

DPSELILeDPSEttL
FF IBUS. r iSïl{ t SST I L. t DP In L. t CSR PURGE REe L.
AUI]O PURGE. !
NOT ETP?I. 3 DP' L. I (CT L + iÀÍCH L. + DATIOB TRÀP.)
Cl & C0 t At t À0 s oFFSET
DA30B tRÀP. lrRAP. Àl t OFFSET e (CfL + CCL)
(BF3X. + BF3 IILL GET SET PER TABLE I)
FULL. .
(BF2X. + BF2 IILL GET S8T............)
(BF2X. + ...f
(BF!X. + ...I
+ TRAP.

360

2.2. ll
2.2. I
2.2.2
2.2. lg

ÀDDR XO TY.

Bhx.

CLT CSR 83.

ctl
clcLE.
qI

IÍ)CTED.
CSR ADDR.

2. 2.1 1

2.2.5

csR PtnGE REQ.

2.2. 12
2.2. a
2.2.2

mTrP sEo.
DP XN.
DP'.
DRIYE P8.

mtYt rrBrrs CTRL.
trTcH AIX)U.
lAtrCE Cnl. <31:15>

XOT f,PTI.

PREY [D82.
PUNGE EVEXT
PURGE SEL. lr0.
REG TTN.
REG T'CE.

ssT. 2rlro

STATUS TIIE.

36r

I'CT ?ABLE
'
2.2..9

2.2.7
2.2.6
2.2.3
2.2. 12
2.2.9
2.2. 13
2.2. l3
2.2.2
2.2.2
2.2.5
2.2. le

BUF Crt 3r l| <--->ttl

tgt<__> P8 H

rsÏï lt --->tf 2
t?t<--- TtrouT H
csRÀ { u --->ta3
l6t<--> DaBz t
csRA ll H --->ttt
t5t<--> STATUS O t
ADDU lt --->tr5
ttt<--> stATus I L
ADE lt ---> t t6
| 3 t <--_ sstï tl
Elrcr ARB L <---tr7
a2t<-__ tltT tl
cl a <-->tt8
tlt<-->
BUF cnr e H
HIGBEST L --->t3g
aft<--> BUF crl 29 H
uRà 2 L <---t lt . . .. . .. 3gt<__> gur crr 3, ll
rÀÍclt B <-->tll .
. 3Et---- GROUXD
UGA ----t 12 . LID . 37t---> URA I L
,
Wt ---- t f 3 . Dífrx. 36 t <--- Ixt H
BUF Cf,r 2g n <-->tl{ .
.
GROTXD
c, H <-->l15 ....... 35t---3lt<--> BUF crr 25 H
URA 3 L <---116
33t<--- Bu? | H
At B <-->tt7
32t<--- csR 3 H
Àl [ <-->tlE
B cli L
3lt<--BUT I Ë --->tl9
3tr<--csRÀ 2 H
' 8UT 2 rr --->t2c
2gt---> iAp CTRL EN L
uRÀ o L <---t2l
2gt<--> DPSEL I ti
BUF Cr! 27 n <-->r22
2?r<--> DPSET C H
scl u <---t23
26t---> SCO H
BUF CËI 26 H <-->t2{
25t<--> oF:sET H
UCX FIGURE I

PIN CONFIGURÀTION DIAGRÀT AND PIN IDENTIFICÀTION

362

3.2E

lDltt s ntA PA?t (uDPt

Iatroductton

l.l

Itrc UDP chlp Ís uscd ln ltrtbus lnterÍace lo9 ic (uI I . lt
connccta thc lln lbus Data rnd Àdd ress I i nes to thc cr r
Àddrcso,/Deta ltncs. It contatns three sets of rcaisters
to buffcr tuo byte Unibus tràns.ctÍons to four byte qI
trrnatct lons.
Itrc chlp Ís dcelgncd as a data slice eonÈ.tnlng tF oits
pcr byte of data and four consecutlvc eddrcss btts.

1.2

Grnerrl Drrcrtptlon
Itre thrcc EufÍered Data Path RcAlsters (8DP) can be
loadcd fror clther thc Unibus or Cf,I.
Itrcy cen bc sourccd onto clthcr the tiribus or Ct|I. Drtr
ie storcd allgncd to thg OlI. tt ts rot.tcd golng to or
fror thc lfrlbus.
thc devicc has fogr ports. lhc uD port is uscd to input
data fror thc Unlbus to tha dcvlcc and aleo to output
data fror tho dcvlcc to thc tf,rlbus. tt ts.
bidlrcctlonal trl atàtc port and tt ls Íntcndcd to be used
vlth a tfnÍbus to trl st.tc tr.nscelvcr.
ttrc UA port ls used to recclve Unlbus Àddrcsscs for
sÈorrgc and corpàrlson. It also ts uscd to output
stored eddregscs !s uel I rs outputlÍr9 CiI suppl ied
addrcsses to bc uecd rlthln the cur (not gotng to the
Untbus). Tttc UÀ is a btdlrectlonal trl state port.
ttrc Ctlr port is a btdirectlonal trl statc porÈ that tlcs
dlrectly Èo thc ctr for rdrlvlng and rccatirlng cddrcgscs
anC dlÈa.

Itrc BUF clrr port ls . btdtrectional tri statc port
through. vhlch rccclvcd eddrcsses or data can be lade
avatleble to the rGst of thc cur. thc cur can also
supply addrorecs and data to bc drlvcn onto thc ctr.
rtc above features
prhartly controllcd by thrcc
groups of control I_ ?re
tncs. Ttre copc I lncs contïol thc
loadlng of thc BDprs and BARrs. ltrc pRTc l,lncs control
s-tec-rlng o! thc _porÈa and thc sc llncs rodtfy thc
thg
lntent of the PRTCfs for
port control.
All reglster clocktng ts donc urÈh r siprlcd clock, BcLx
ls consldered to be cror onc rlslng edgc of
!r_ À_Lcycle
BcLx
to the nert. Tte chtp gcncrally GrpGcts-thaÉ
control tnpuÈs g:-n change it"t-aftcr t-hr itstng cdgcall
BctK L and rl ll bc stablc by rhc tlrc t1 iiirs.of
363

2.4
2.1

2.2

lntcrnal st.tc changce arG usually radc rtth Èhe loy
Portlon of Bctf, L end control le-donc lntcrrnally by
gattng off thlg lor pulae. tlrrlcss othcrvtae strtedr- ali
rcglrtcrs !r. fced througyh latches Èhat rrc opcn uhcn
BCLX L ls tou.
Rtglrtrrr
ctl lrtch
tttlc le rn I blÈ fecdthrough latch on the lncollng Cit
Itncg. lt ls opGn ytrcn BCLi L ls hlgh and cloces-uhcn
BCLI L gocs lou. It ts dcslgncd to cnablc l.tcheg
lnsldc thc chlp to rcet th.lr hold tlrc rcgulrcrcntl
cyên Èhongh thc CtíI thlng rpcctflcetton alloys data to
dlsappcar 2ns bcfore thc rlslng cdgc of BCLtr. Àll
rcferences to thc CtI for thc rèralndcr of thls
apcclflcatlon actually rcfcr to the output of thts
latch, not thc CtI ptns on thc chtp.
lDP Regtrtart

lndlcrtes the loadlng of dcta lnto the BDp
reglatara. tlrerc arc thrcc rcalstcre and thc prrtlcular
one to gct loadcd lr sclcctcd by thc valuc of thc lnput
'plne DP SEL. Yoluce of l, 2o or 3 eclect onc of thc
thrre rcglatcre. Xonc rrc loadcd for r valuc of O (see
scctlon 1.5r. Each regleÈcr hag tuo blts pcr bytc.
Both rrc trcttrd ldcntlcolly, thcreforc the chert shous
hor thc rcAlrters erc loaded on ! pcr byte bacts.
UD lrtcho
I
tlrcrc rrc fcodthrough letchcc that drÍvc thc UD plns.
tlrctr opcratlon lr dorcrlbod ln Chart. tlrc lctchcs arc
actually constrrrctcd by tylng the rccclvcr output Èo one
of th. drlvcr lnputt. It lg thcrcforc nec.aarry for thc
trl rtttc enrblc of thr UD plnr to bc cnablcd ln order
for th. latch to clogc.
Buf lrrrd lddror n gt.t.rr (llnl
ttcrc rrc thrcc EAR|ar corrctpondlng Èo the non zGro
velucr of DP SEL. A BÀR lr Èlockcd rtren BDFC2 tg hlgh.
ttrey trc four blt lttch.t, cach blt ls loadcd fror a-UA
UDP Table t

2.3

2.tl

pln.

2.3

bcrlvrd Gtl Àddror lrglrtrr (nCAn,
tlrc RCÀR ls a thrcc (O, l, 2'l bytcr tuo bÍte per byte
rcAlrtcr. It ls loadcd fror thc Cnt and lg clocked on
ant cyclc for vhlch DBBZ U ls lo'r end prcvlous DBBZ H te
lou.

36r

3.,
3.1

t.2

4.,
a.l

st.tc Gontrol Elcrcnts
Drlvr UA
Drlvc t,À Ís thc output of an s-R Fp vlrose dtrcct clcar
lnput ts ÈhG'or'of SCC ll, SCI L arË pRIrC. L[8. tt is
dlrcctly act by thc .rnd. of SCt L. SCI B, BCLI L. and
tie output of rn S-R FF ÈheÈ ls tGt by BCLr L bclng lor
dnd cloared by PRlc2lf - LBH. (rr both FF.s slrultaÀcous
àrrcrtlon of act and clcar c.usca thc output to bc hlgh.
Drlvr CtI
Drlvc ctt lg r tro blt roglstcr that conrrols the
cnebl ln9 of the CII trl rtatc drtvrrr and el.so the
3ourcC oÍ thc cil deta. rt tc clockod on the rlsing
odgc of 8CLI. TtlG lourcca of Cit drtvc and functlons
thlt cnable thc drlvcra are dcccrtbcd ln sccÈlon 1.3.
Pln Ltrt
UD

ttrcsc four llncs connGct to the Unlbus throlgh a thibus

to trl st.tc tranacclver. ThG full nrGa fol thc llncs

are 3

OC
Bytc zcro, flrst btt
tl
Eytc zcro, sccond btt
UD
3E
Byte oDCr flrst blt
T'D
t9
Bytc onc, gccond blt
Both btts ulthln cach lyte.rG hendlcd thc rrc ury.
UDP ?eblc 2 rhour rhet l3 ouÈput on thcsc ltncr.
ttGsc
Itneg .re actually tho outpuÈ of Èhc uD leteh. lhc
output le r f unctlon of thc pRTc llncg (ecctlon ,1.91 ,
the Al llnc (1.6), and thc offset llnc (a.z). thcgc
llncs are asaêrtod hlgh.
uAr
Tàcse four llncs rccclvc thc unlbur Àddrerr. ttrcy crn
be sourced frol the BÀRs or thr RcÀR. ïfrc outpót
ts
controllcd by thc PRTC ltneg (l.9rr the gUF SEL, anC Èhc
sc llnes ({.lg). uDp tebrG 3 rteli rhe ouput cónàilrons
for Èhese ltncs. ttrG full n.rea for the fóur llncs rres
UD
UD

4.2

UAO
UAI
UA2
UA3
ïttesc llnes are raaerted hÍgh.

365

4.3

qI
tlrrro rlght ltner tle dÍrectly to thc ctt. ïtcrc .rG
tuo bttr p.r byte . tt. full nrct .r.s
cf,t aa
Sytr ! flrrt blt
cnt ,t
Eyto I recond blt
crt tt
Bytc t ftrtt blt
crt t9
Bytr I rocond btt
Bytc 2 f lrtt blt
cf,t 16
cf,I l?
Blrtc 2 rrcond bl t
crt 2a
Eytc 3 flrst blt
o|r 23
Byte 3 cccond blt
UDP tablcr a and 5 drrcrlbc tho sourccs of lnfonetlon
drtven onto Èhrrc llnot. thG trl !t.tr cnablc for thcsc
lÍnor tnd thc drta on th.. ls ectutlly cnablcd by thc
rletng edgc of ECLÍ thot occurs eftcr thc PRTC ór SC
llncs havc bccn
onablcd. SGG ecctlon 3.2. Írccc llncs
-'htgh.
I

arc raacrtcd

l.a

lu? Grl
tïroac arc I btdtrcctlonal trt etatc ltncs rre uscd to
provldc addrcal.f r rlp cntrlcl, end CSR data to Èhc qt
rhon ured a. lnpute. Ih.n urod rs outpuÈt th.y provtdc
CnI addrccscg to thc Unlbue end deta to vrlte the rap
and CSRrs ulthtn thc CUI.
ttrcy .rc prlrerlly undcr thc control oÍ the PRTC llncs
and thc SC llner at shoyn ln UDP Tablc 6. Ihcncvcr Èhc
PRtC2lt llneg havc thc valuc LHI, PREV fBZ hts thc
valuc L. and DBBZ L has thc value L, thGn Bytc 3 oÍ thc
BUF Cf,I has thc value of Cttt 83 and not ltl-Z ac chout ln
thc chart. Tfrcsc llnes trc tascrÈcd hlgh.

1.5

DP sEL

tiresc arc tF lnput lÍnes that aelcct uhlch of four DrÈa
Paths-rto u8c for valucs of lr 2o 3r lt selects data f rol
one of thc BDP.I. For valucs of Oo thc ehlp typÍcally
brhavcr ln r dtffcrent renncr. Ihcsc dlfferenccs tre
callcd ouÈ tn thc rpproprlate sectlons. nrll naees rre
DP SEL I and DP SEL l.
ttrcse llncs arc asscrtcd hlgh.
1.6

Alr A,
tlrcgc lnprrt llnce cotc fror the tlnlbus Al, Ag tlncc and
arc gcncrelly ugcd to epcclfy uhcthcr thc Unlbur data
goc. tolcorcc fror thc up.pcr or loucr tuo bytce of Èhr
varlour four bytc portr and regletcrr. Ilrcrc ltncr arr
.63.rtCd htgh. fic At llnc lr only uecd rhon tho BDFC
llner lndlceÈe a DÀtlOB functton.

366 .

4.7

O??EET

lfrc lnput lr thc byte offrct llnc rtrtch colcs frc the
trP.
tt rlbclflcr thrt thc ttnlbus deta should bc
trcrted.a though tts oddrcss lr onc bytc hlghcr than
Èhc llrlbur lddrcrr. tlrlg llnc ls tssertcd lrlgh.
a.!

IDFC

Írcrc t llncr rpcclfy hov the BDP.nd B n lrtchcs should
bc lordcd. lhclr usc tc proclscly spcclflcd tn Scctton
2. UDP Teblc 7 srrrerlrce thc control functlons.
1.9

Pnlt
ïfrcsc- 3 lnputs control thc rtccrlÍtg fo thc ports.

ltrcy

erc dclcrtbcd ln dctall ln scettonr l. lr a.Z. 1.3, anó
l.l.
UDP teblc t Eurlar.zGs hor thc ports .rG
controllcd for SC valucs of LL. Scctlon a.? orplalns
thc affect of SC.
l. It

Itrcec llncs rodtfy thc rctlvlty of thc chlprs ports to
bc dlffcrcnt fror ulrrt lc noÍrtlly spcctf tcd by thc pRllC
Itncc. lhclr tntcnded urc lr to rnrblc Rrrds end rrltcs
to rCgrstert tlthln the CUI ttrelt.
llrcrc lncludc thc
8AR's (Roed hlyl , t5e tÀp, rnd thc CSRrl. t|rc prcclsc
afÍect on Èhc portr lr dorerlbGd undcr ecch porÈ. UDp
Tablc 9 glvcs .n ovcretcr of thc cffcct of thcsc llnos.

a.ll

tA|rcE

rtrls pln lr a bld trcctlonal control slgnal .
oPan collrctor outPut.

rt ls .n

rhcn PRïlcl . Hr thÍe pln ts rn tnput. th. output drlvcr
ls dlseblcd. rt ts uecd to tGtl Èhc uDp thet on thc
ncrt rtltng odgc of EcLr, lt ray rrscrt lts cir drlvcrs.
Scc seeÈtong 4. 3 f or thts f unctlon r loy hpl te s rsrGrt
on Cf,l .

For ell othcr valucs of pR?C, thÍs pln Ís rn output.
Htgh ls.nr th.t thc vrluc on thc uÀ ilnca retchcs i*rat
le rtorod ln tho BAR rclrcÈad by thc Dp sEL llncs. lou

r.anr m lAttCH.
a. t2

IGTI L

Bclr lr urd to clocl rll oÍ th. .trt. .lclGnts vlthln
th? chtp. ltrr n.tur. of tho rt.tc e lcront (rdgr
trlggrrrd, tr.n.p.ront, r.rt.r-rlavr, etc.t tr aoitnrc
rlong rlth ttr funcÈtontl drftnltlon.

367

a. 13

Blt

ËBz ls r buffcred copy of thc r8z L rlgncl on thc ctt.
Itg utc tr doflnod ln gectlonr 2.so 3.zo l.3r and l.l.
a. ta

PRIV Btt

I
lntcndrd to rocetve . copy of ctrt rBz that
?hl"
^pll tr ln_to.ln
lr clocrcd
edge trrggerod o'ilop on thc rriing
cdgc oÍ BcLl L. tÈg uge lr aitatlcd Ín ccctlonr 2.5 rnd
l. l.

a. t5

IDI

rDl lr urd to dlrttnguÍsh dtfÍcrcnt uDp chtps rong rhG
four th.t rr. urcd tn thr rystGr. rt le rct- ac folÍors:
Ettr./Eytr
trl
213
lr5
6r7

I. T6

chrp I
o

2
3

tDl
L
H

L
L

IDDIU, ADE

tlrrso tb llncr rrG urcd Èo provldo Èhc cul control
logtc rlth tnfonatlon rr tG\ uhGthGr or not thc eddrorr
on tho cnr lr etthrr tn thr l,ïrlbur rp.cc or thc cul tÀp
alÉ CSR rpace . Írcsc rra opon colleqtor outputt.
lhc dccodc of thc addrcgr llncs changes rlth thc tD pln.
ÀDDt, . (qI f?l (ql 16,
ADE . (crl f7, (crl 16, (cII t9) (CtrlrE, for tDl r !
ADE - (qI l?l (OlI f5) for IDI r tl

t6c

5.t
PIr I

Pta Ltrt Snrry
ELtqrnrctL cltmctsnlsttcs
Trengcolyer

Trenrce lve r

Trrnccolucr

ttrnrcclvor
Trrnrcrlvcr
ttrnrcolvrr

Trlnreelvcr
Trrntcelvcr

Trrntcrlver
TrrnrcotYer
lrrnrcelver
Trrnrcrtvrr
Itrnrce lvor

Itrnrcrlvor
ttrnrcrlvor
ttrnrcolvor
ttrnrcrlvor
ltrnrcrlve r
Trrnrcclvrr
ttcnrcrlvrr
Trrnrcctvor
Itrnrr.olve r

lrrnrcrlver
Itrnrcrlvcr
Input
Input
Input
Input

?r I -Stttc
Tr l-Strtc
tr I -Strtr

tt t-Stttc
?r l -Strte
lt l-Strtc
tr t -Stetr
Tr l-Strte
Itl-St.tG
Tr l-St.t.
tr I -Strtr
tr l-6trtc
lr I -Strte

Tr t-St.ÈG
tr I -Stetc
Tr l-Stetc

tr l-Strte
tr l-Strtc
?r l-Strto
?r l-Statc
tr I -Strtr

It t-Strte
lr l-Strtt
?r l-Strtr

Itrntcclvcr
fnpuÈ

lnput
Input
Input

Output

Ortput

uDfta
UDTIB
UD'IA
UD'98
Il^IB

TIAIB
IIA2E

I,À3B '
B
cf,r tl'I f,
crl tt f,
cf,t ,9 B
CTI 16 T
cf,t t7 f,
CTI

crl 2a f
crl 25 E

DU? Crt aa a

Er[ cnt tl I
tt E
Et[ cf,t t9 E
BUF CrI t6 f,
EU? Cnt l? tr
EU? Crt

luP crr 2a a
Blr?

ctt 2a tr

AIE
Ata

o?Fsrt a
SDFC 2 E

IDFC t A

InpuÈ

Input
Input
Input
Input
Input
Input

SIGHL IIIII

BDFC

PRIC

PRtt '2 á
Pntc I I

sclB'
Opon Collcctor

S'E

rAtca I
ECLT L

Dtr r

PR8Y DBZ II

Opcn Colloctor
Opon Oollcctor

t69

IDI B

ÀDDT' I
ADDC B

UDP

trblr I

fD? brdtng

eltnt OILI lDPtIlS fttf
crtRot IrPtrtS

LL
LE

Ltr

a
L

!raa

cnt Bt cf,I D2 Cf,r Bl cnr Bl

t
r

L
f,
L
a

x
x
x

L
L
tr
u

.uD

UD BI

L
L
tr

Ë
Ë

ËË
xtr
BB

BI
utr
IB

un
un
utr
FIES:

ï--

REI8?BNS

rD? lt

UL
IL
ËL

- l,!, !L, !I

Àl À, o??83t

IDFC

2l
tL

Dp StL t.!

L
L
L

L
tr
L
Ë

L
B

L
L
L

B
B

L
L

PD 12 tDP !t

DONTT USE

UD BI
a
a

UD B'
a

UD BI
a

uEl
BI

UDBI '
UD BI
UD B'
aa
aa

r
uDEt
tuD
BT
aa
tuD
8l
O.
uDEl r
aa

I
a

IDP !t

UD B'

a
a
a

UD BC
a

a
a

a
a
a

UD BI
D(XI T

lceoa rcAlrtcr not loedod

37a

T USE

UDP ïtrbh 2

uD
PRITC

IDFC rt

lrtct sourc3s

o??sBt uD ll

uD It

LL[
LLII

LLI
Ltf,
LtB

Ltll

Lt8

LtE
LLH

8tJ
HL8

roats

I
LLtrLL
LLtrNL
LLf,LË
LLH H
Lf,II L
LBII H
Lf,ELB
LUBBH

SEt DP BI

STL DP 83

SIL DP 82

sEt DP 8!

L
L

SEt DP BI
SEL DP 13
EEI DP 82
SEL DP B'

SEt DP !'
SIt DP 82

xLX
xHX

SEt DP B2 SEl. DP BI

crt Bl

CII 83

SEL DP BI
SEL DP 83

cf,t Bf

CTI 82

lhon PRTC - LLB ls flrgÈ gclcctGd, thc uD latch data ls
undcflncd. rt rlll rcrrln undcflncd unÈÍl thc ftrst
occurr.ncc of EcLr L bclng lor ulth EDFC r lrtr or LLH. rf
PRTC ls 8ct to rny valuc other Èhan LLH follorlng thc
latchlng of data, thc lrtch.d data rlll bc logt.
SELDP lc: 8DP tf DPSEL r le 2. 3
CrI latch lf DpSEL . a
uD ls undcflncd unÈll thc flrst occurrence of BcLr L golng
L.

llcang not clocked.

37t

@ Èble !

n am38

sl s,

trÍc
2l
Lt

Ltl

Ix
TX
TX

ort

rctcs

L
L

tl-z
tl-z

I
I
I

stL Drn 32

rl-z

xt-r

f,l-l

xl-t

nl-t

nl-z
xt-z

El-r

xl-z

I
,l

f,l-l

st& EAn 32
ncAn t9
at

IIO?ES:

SEL EÀn rcfcrt

to thr BAR rclcctGd by thc vtluc of DP SEL.

372

trbh I
CTI DRIYT

8C 8C

Pme

tttcE

DBr L

Crt

HI-Z

x
x
x

8UF Cl'lI
HI-Z
8UF CrI

II-Z

Íttls

2lrla
LLLHLX
LLLHHX
LLHHLX
L
L U,
tHXHtH
LIIXHLL
LHXHHX
LHXHHX
HLLHLX
HLLHLX
HLIIHLX
H
HL
HHHHLX

H H

x
x

BUF OII
BUF CiI
BUF CTI

8DP

Ht -z

HI.Z

I
1

uBus

IIOTES:

l.
2.
3.

BUF CtlI bytes rap lnto CiI bytes one to onc.

Ibnr t use.

iapplng às follovs:

OII Bytc
Unlbuc Bytc
ae
lt
2g
3l
BDP lc tn hprcclsc tcrr.
Actual rapplng ls r function of Dp
SEL and B3. UDP Teblc 5 llsts lapptng by byte.

373

UDP trrble 5

Cf,I nIYl

?OR PnïtC - ILL

D? sal It
te,

ctr !3

cr 12

crr tl

crt lt

L
L
L
H
II

UDBI
UDB'
8DPT83
BDP283
8DP383

UD8'
UDBI
BDPI82
BDPI82
8DPI82

UDBI
UDB'
BDPIBI
BDPIBI
PDAIBI

UDBI
UDEI

L
L
H
L
L

t
H
X
X
X

BDPIBC

BDPIE'

BDPIEO

UDP ?rblr 6

BU? Cf,t SOInCES
PRïC

2lt
LLL
LLL
LtL
LLH
LtH
LLH
LLH
LHX
LHX
LHX
HLL
HLL
HLL
HXH
HXH

!u? ctl

crËI

HI-Z

uI -z

HI -Z
HI -Z
Ht -z

HL
HH

HI-Z

HT-Z

cnt

HI -Z

H.HL

cltI

RCAR

XH
H

NOTES:

HI-Z

x)?Es

bntt

3?r

I
I
I
I

UDP trblc 7
BDFC COITNOLS
BDFC

2
L
L

I
L
L

O BDP
BAR
C(NTEXTS
t XO L(ND
NO IOAD IDLE STÀTE
H BDP <-- Cir, uD <--BDP/CAr f,O LOAD nEnORï DATA Olt CtrI
FOR IEUS

L
L

H
B

L
H

UD <-- BDP,/CiI

BDPB'

SPARE

NO LOAD UD GETS DÀTÀ T ROT
BDP OR Cf,l lF DP . C
OX TRAP

II
H
H

L
H
II

H
1H

BDP <-- UD IïO BTTES
BDP <-- UD OXE BrlE

375

LOAD
LOAD
LOÀD

DÀTO
DÀ?OB
SPARE

UDP Trble I

PNllC DESCRIPIION
PRlIC

uÀ

LL
LL

HI -Z
BDP,/CftI

Hl-z

HI-Z

TDLE

HT-Z

UNIEUS DEVICE DOING

HI-Z

8UF CnI

PUT ADDRESS ON CI,I I
WITH IIÀP ÀDDRESSED

Ht-z

8u? crl

HT-Z HI-Z

ctl

c(nlExT

DÀrr (P)

FRotI I'BUS

Ht-z

BAR

HI-Z

BUF CI{I

LIKE ÀBOVE BUT I{ÀP

ÀDDRESSED BY 8AR

Ht-z

HI-Z

HT-Z

BDP/VD

UNIBUS DEVICE DOING
DATO ( B)

Ctl

HI-Z

RCÀR

nt-z

CPU DOING h'RITE TO
uBus

HH
hH

L
H

SPARE

HI -Z

ur-z RcÀR

TOTE:

ttrls chart applles only for SC r HL.
VB reans A tf DPSEL rí. c.
B lÍ DPSEL e.

376

UBUS

CPU DOING READ TO
t Bus

UDP Trble 9

sct 8c,
l|L
NH
LL
LH

ctt
BÀR BUF crt

lu? ctl ust

HI-Z
RCAR
C]TT
RCAR BUF cnt HI-Z

LDGTL II'f, TIESI
PR$C YATUES

IDLE

ALL

READ BAR, CSR

LLL, LLH, IJ|X

TNI?E iAP, CSR LLL, LHX, HLt
READ tAP,

l|otE:
Blenkg ln thc port flclds lcrn no changc.

377

LLL, LLH, TJIX

3.29

rrcRo-tnÀP cHrP (UTR-DC628I

GENERAT DESCRIPTIOI{:

defÍnes the detall requirenents for a
tll" spGclflcatton
itero-Trap
Chtp (UTR). UTR ls a conÈrol chlp yhich
detects and prtorltlzcs nlcro-trrp condltlona and
gcnerates f a blt rlcro vactor tdentlfylng thc hlghcst
prlorlty alcro-trap. urR also conÈatni sévcral r[atuc
reglsters vhlch provtde addlttonal lnfornatton about the
condltlons rhlch causcd the alcro-trep.

tra

UTN TADLE I

Pln ldrntlÍlcttlon rnd Grte ryp.

ttrt

IPII | | ?lI lD

lr
15
16
17
18
19
lrt
Itr

lfl
It5
lf6
IT7
lf8
ff9

larcurRApzL

lUTnAPt

lrlcRoYEcToR3H
| PTE Cf,tCI OR PROBE H
lrIcRoYECtORlH
lrIcRoYEClrORtH
InICROVECTOR2H
lGExDtS"IxtrL
lmSRuCt
lrsRcEf,
I EIc UIRAP t L
ITGTRLBBLIXXL
lxaSELEcTË
IXE'IXUSEL
IPROCIIITL
lRTuTDIxllL

aza
l2r
122
123

lsTATustll
f sTA?usllt
ISTATUSYALIDT
lxetlxusEl.

125
26
27

| Ixf,IBITCiI H
IPREFEïTCXL
IPBÀSEIB
'l

l2r

28
30
3l

29
32
33
3I
36
37
I39
llc
ltr
ll3
ll3
III
lfs
116
ll7
II8

lBcrrl

IsuS 27 n
lrrBts 26n
lEuS2Sa
frBus2fH

IDCIiEIIABLEH
f IÀTCEBDïCTRL2H
I!.ÀïICËEDTCTRL'H
| I.ATCËEDTCTRL I H
ITBTÀGa PERRH
I WRITE BUS ERROR I}IT L
ITBTAGIPERRH
lTBltlTtH
| m HIT I H
fmPÀRITYENAH
ITBITB
lIÀTcHEDBus3H
lT8DA?APERRH
lAcvtr
IADDREGEXAL

I ccrDrrs

_r
I

I
|
I
I
I
I
I
I

|
I
!
I
I
I

I
I
I
I

I cA"E ?rPr

i
i
iTlr]tF--i
icÀlrtF
i
tcÀITTF
lcAlTzH

| GÀITNF
tGÀlTzH
tcAl?zH

lcÀlTzH
tcAlTTN

tcÀlTilF
lcAlTxF

| GAITNF
fcÀlrxF

lGAlnrF

IGAITNF

lGAlrïF

tcÀlTxF

lcAlTNF

lcÀlTilF
IGAITIIF

lcÀlt1F

lcArnt|F

I
I
I

lcAtTxF

lcÀtrzF

|
I
I

I
I
I
I
I
I
I
I
|
I
I
I
I
|
I

379

lcAlTTN

IGAINTF

| GAltzF

lcÀtTzF

lcAlrzF

lcAl1trF
lcAlTNF
IGATTIIF
lGÀITNF
lcAlTNF
I GAITTN
lcAtmF
lcAtrNF
| 6ÀITNF

l6ÀITNF

IGÀTTNF

f cAlTNF

lcArTNlF

lcÀITNF
!GAITNF

I
I

cttP r./o Stmmt
IIPU"E

f?trs

ACY I
ADD REG EXA L

I
I
I
I
I

BCtf,L

D CLT EIAELE II
DO SRYC L
tr U"RAP (2zO) L
lAtlCEED BUS 3 B

l^trcl|tD ICTRL (2zO) H3

r8Itf,

l|6RC r

PËASE I II
PREFE|ICU L
PROC IXIT L
P,lE CBECT OR PROBE HI
RTUT DIXH L
STÀTUS (l:0) H
STATUS VÀLID L
T8 DÀTA PERR B

?B llIT <l:3) ll
TB PARITï EXA H
TB TAG (l:0) PERR H
WCTRL f,ULXXX L
XB SETECT II

lO(t: l) Ix USE t

I
I
t
I
I
I
2

I
I
2
I
2
I
I
2

BT-DIRECTIOXAL LITES (TRI-S?ATE UXLESS OTHEË{ISE XOTED}

ttcRo vEcToR (3:9) H

I
{

Í|BUS (27221> H

ouTPuTs (ToTEr POLE uxl,Ess oTuEtrrsE NoTED)

I
I
I
I

GEII DEST INB L
IXHTBIT CTI H
UTRÀP L

WRITE BUS ERROR I]IT L

Frrfonenca

2.1

ttrc follorlng ls e parÈlal I tst of code asstgÍraents for
Èha ICTRL tllcro Ilcld:
PSL <- (IEUS'
oo.
vA <- FC + ISIZE + (mUS)
2C.
FC
vA <- vA S.AYE + (rBUS)
21.
vA<-YÀ+l
22.
23.

24.

rm
FC

380

25.
26.
27.
2E.
29.
24.
28.
2C.
2D.
28.
2ê.
3e.
31.
32.
33.
3f .
35.
37.
38.
39.
3À.
38.
3C.
3D.
38.
3F.
2.2

VA <- (mUSl r

tr8us <- HDR
HDR

TB DÀTA <- (rBus)
TB VÀLID BIT

IIDR

nDR <- lR, ZERO EXTEXDED
PC

CACHE VALID BIT <- E
VA

rDR <- (líBus,

t|DR <- OSR, ZERO EXTENDED

SIATUS/COI|TROL REGISTER <- HBUS<2?:24>
PREVIOUS iODE REGTSTER <- WBUS<23222)
WBUS<2?221) <- STA?US/CONTROL REGISTER
8US GRAilT
STATUS,/COXTROL ÀDDRESS REGISTER <- WBUS<27224>
ISr/CURRENT IIODE REGISTER <- IBUS<26221)

REt CI|ECK

AS?LVL RDGISTER <- I|BUS<2622i>
(RESERVED)

WBUS<26224) <- ÀSTLVt REGISTER
(RESERVED)

HIGHEST SOFIïÀRE IpR REGISTER <- HBUS<20: 16>
l?t REGISTER <- IÍBUS<2Oz16>
XOP

fBUS<2e: 16)

rcrRL Functtons arc decodcd fror .LÀTcHED HcrRL (2ze) H.
and 'lícrRL Hltlxxx Lr uhlch ts TRUE (LOrl lf thc 3 Dosr

signlflcant btts of thc 6 btt'IAT€HED rcrRL (5:0> H.
fteld rrc
'LàtCllED ICTRL 5 lt. r l.
IATCIIED ICTRL I lt. . I
'TL1TCHED
UCTRT 3 H. . e
s

2.3

If,TtRIÀL SIGIÀt DE?III?IOIS
.'BUS GRÀNT DEC H. ls TRUE tf:

(WCTRL Decode)

BUS GRANT

rrEllA UtrcTR HI lt. ls TRUE tf :
('UTRÀP H. + tpTE CHECX OR PROBE H.)

..ETA UTrcTR H. Is TRUE If :
.U?RÀP HT t

'DO SRVC L'

..UTRAP HT Ig TRUE Íf:

38r

.Pf,ÀSE I

L' t 'U?RAP PEXD ['
rTU?RÀP PGTD [' II TRUE II:
[' + rTB TAG ERROR lt. + rTB ttSS H. +
'm
.ICY UtRÀP
PERR DEL H' + 'BUS ERR UTRAP H' + IXBI UTRAP TI'
+ .TB, UTRAP B. + .DO
SRVC U. + .!ÀTCBED UTRÀP H.
pEXC UTR P B' tt IRUE lf :
(rErc UTRAP 2 H. e .EXC UTRAP I H.! +
rtUS T'T'RAP EXA H' T
('ElfC UtnÀP 2 U' +'EIC UTRAP I Hr +.EXC UTRAP 0 H.)
I'BUS U?RAP EXA [. lr IRUE lf:
.ADD REG EXA B' T TR?UT DIXB L' T
TPRIFEICII L' O
'BUS GRAXT DEC L'
.'tB TAG ERROR ll' lr IRUE t f :
rBUS UTRÀP Ef,A II' T
[ ('UIT I H' t 'Blt a B'] + rTAG I PERR H' + TÀc O
PERn B'l
I'TAG I PERR n' ls Èhc IIGH TRUE output of r latch rhich
lr cneblrd óurlng:
. Dtx

l Tcf, ExA B.

IÀIICB IXPUT IS:

.TE TÀG I PERR Ë' O 'TB PARTTï E]IA H'

.IFUIC lÀllCB ExA B' lr tnUE lf :
.ADD REG EXÀ Ë' E 'ADD RIG 8IA DEL L'

.'TAG a PERR B' lr Èho UIGB IRUE ouÈPut of t laÈch uhlch
le rnabhd durlng:

r?urc taTrcB ExA lt'
'áltCH IIPUT IS:

.'8 TAG O PTRR H' T TTB PARI?ï EXA H'
rrDAtA P8RR H' le thc [lGH TRUE output of e latch rhlch
lr cnablcd durlng:
.FUIC tÁllcH EXA HT
IATICH IIPUT I5:

t82

.TB DATA PERR H' E '?B P,ARIIï EIIA HI

.'HtT I H' ls thc HIGH TRUE output of e Irtch vhtch ls
cnabled

dur lng :

! Flfitc tÀTcH ElfA lt.
I,ÀTCH ITIPUT IS:

'TO HIT I H' + .18 p RtTf EXA L.

.!HIT a H' tr thc HIGH IRUE output of a l.tch uhÍch Íg
cnablcd dur lng:

.?tl|c lÀTclt ENA n.
IÀICH II{PUT IS:

ITB IIIT O H. T TTB PARTTI ExA f,.

r'ÀC VIO Hr le thc HIGH TRUE ouÈput of a l.rch vhtch ls
cnebled

dur Íng :

.FUNC !ÀTCH ElfÀ H.

IÀTCH ITIPUT IS:

.ACV H' I

'TB PARTTT ENÀ H'

.'TB ltlss lt' lc TRUE tf :
.BI'S UTRÀP ENA H' I
[(.ta!cltED Bus 3 Fr t

.|| BIT L. r .T8 pARtTï Et|À l|.)

(.HIT I L' t .HIT t L.) I

.'XEl UTRAP ll. lr ?RUE lf

('XBl UTR P PEIID lt. 3 .XEl IX USE n.) r
('XB SELECT L' + .XBC UTRÀP PEI{D L.)
.'XBO UTRAP ll'

le TRUE lf :
('xBt UTRAP pExD lt. 5 .x8i llt usE n.) t
(rXB EELECT H' + 'XBl U1R^P PEND L.)
rTXSI UTRAP PEIID H. Ír TRUE tT:
'xBl Acv Hr + rxBl sTÀTUs I L. + lxgr uB UIALIGXED H'
+
.X8I TAG I PERR H. + ?x8I TAG c PERR II. +
'x8l'DÀTA
PERR H. +
'XBl tut? 8tT Hr + .XBl TB I|ISS H.

383

.'Et tutt lt? I' lt tnUE lf :
.I!l t3 BI? I tr. r .rDl tA f,rt , lt.
.'Ill t! ll88 X' lr ttUt tÍ:
.rlt tt trIt I L.3.rtl lD utt t L.
.'8, ttt?AP PIID ll' lr tRUE lf :
'IDt ACY X' + 'I!a StAtlrS I L' + 'XEO tD ITXALIGIED B'
+
.Tt, IAG I PGRR i. + .T!I TAG . PERR H. + .X8t [)ATA
PTRR f,. +
'IP, tUtT f,lT Ur + 'IB, ?E iISS ll'
.'XEt rULt XIT ll' lr tnUE lf :
.rDt tE Ëlt I t' 3 .x8t TB Htt , H'
.'Pt TD ilSS f,' tr tRUt tf :
'x8f 18 Ett I L' E .xBf TB rlt , L.
.'IA!rCUED Ul UIAL B' lr tho trlGB tnUE ottput of . lctch
rhtch lr cneblcd durÍng:
.?uxc ltlrcH ErA B.
STCu rxPUT r8:

.Erc UTRAP 7A'Í '8XC UTRÀP I L't'EIIC U?RÀP Lrt
'
[.?B PÀRI?Ig'EXÀ Lr +
('t8 lttt I
.xoR. '?B HIT c H') t !Àcy L' t

. .TE IAG I PDRR L' E 'TB TAG

L'l

.'PREFEI'CB clc

PERR L'

T 'TB DÀ?À PERR

H' ls the tltch TRUE output of r latch

vhtch lg
.Ftltc tÀtlcH ENÀ H'

enablcd durIng:

TAïIEB INPUT IS":
.PREFETCH H'

.!RAÀD CïC B' ls
lr cneblcd

Èhe

HIGH TRUE output of a

. PIDC IÀllCA EXA H'
TÀTICË IIPUT IS:

. tÀtlcBED BUS 3 L' + 'PREFtT|Ctr Hr

t8r

l!tch uhich
durlng:

lEl

ERn EA B' tr

ttUE lf :

.PREFETCf, CllC B. T .SIATI,S YÀL E. .

.XE SELECT f,'

.'XE, 8RR tIA [' ls tnUE if:
.PnEFEITCX CtC X. r .StAlIrS YAL B. 5
.TB
SELECT L'

.'PBÀSE 2 CI,Í f,' ls ttUE'lt:

L. e .B Clr H.
.'EX/U| tE ERR n' ls tnUE tt:
.ADD REG ExÀ DEL U' E 'BUS UTRAP 8IIÀ B' I .B CLf, E'
.'SEt XOX EXIST Hr ls lnUE lf:
.PIASE 2 CLÍ H' 3
[ ('x8l stAtus I L. e .r8l sTAtus o L' t 'r8l U?RÀP
B'l +
('xDt sTAtrJs I L. 3 .r8t sTATus a L' t .xBt utnÀP
'PUÀSE I

H'l I +

(.STAT I L. t .StÀT t L. 3 rs?ATUS YAL n. )

.'STAT I ll' ls thc [IGlt tnUE output of . làtch uhleh lr
cnablod durln9:
.STATUS YÀL H'

I.ÀICII IIIPUT IS:
.STATUS I H.

.'STLï e h' ls the ltIGË TRUE output of à latch utrlch lr
cnabic.? durlng:
.STATUS VAL H'

IATCH IIIPU' IS:
.sTATt,S 0 H.

.'SET UIICORR U. ls TRUE,lf :
.PltÀsE 2 cLK Ë. &

L. t rxBl ^TÀTus cH' ! .XBI UIRÀP
H') +
(rxBo STATUS I L. r .x80 sTÀtus oH' T ..XBt UTRÀP
H.D +
[ (.xBl STATUS I

3t5

('stf" I L' r ' Artt , f. t . SftTUE YÀ|. f.)
r.BBt oom DtÀ r. rr ,no! l!:
.riAa! 2 clr t. t
l('M 8tÀtt 8 I N. r .xtt Srtrus r L' a .Irl uttAp
f')
('Ila+ sTÀllrs I t' I 'r3t srÀrus a L. . .tra utnÀp
i'l I +
' r'arÀr r ". . 'a?Àr r L. r .srA?ua vÀL f,.r
.'8!l ttc t tlnn r. Ir tnur tt:
.ti^at 2 c!f, i. 3
G I Pltn I', +
l!'!!f
UlrÀ? !' .-'!!l
(.Et utntD
f,' r .r!t ?Àc I Etnt i., t +
('lrc I Pltt I. r .lltr r! rnn r.t
ást|. rrc r prnn i. r. rnu! rrr
i
.?tÀsa 2 ctr r. r
.Ill G a rlnn r.) +
Í (.Ill utnÀP tr. &.n,
lrc a ElnR B.ti +
l'n| utarp i' a
.

a Ënr r. 3 ' lltt

r! 3nt f,'l
..art"AC
Dl?À I Plrr r. tr trur tt:
l

.PtÀst2CtrIra

l('t!r utnAE r' r 'x!t Dttr Ernn l. a'.r81 rr trT I
f.l +
('Ill ulnÀP I. Ê 'I3a DtlÀ ESnt Xr a .r3l tB NtT I
r'rl +

I a' a ' rlt|r te 8nn B',
r.sft Btt t Etnn ,. t. tRuB ttt
.?rÀs! 2 ctr r. a
UtnÀP lr t .M n?A ?tnR |. r rIBt rB tlt ,
[(.Pl
. f,'l +
í.It, utnÀE f. r .Itt If,tA pERn l|. s .tBa TB ErT a
r'rl +
('OrlÀ rlnn X! 3 'ltr

('DÀtA DCm N' e 'l!? t E' r 'arÀà ra BRn l|.f

.'lIA nU6 f,' t. lnul lf r
.PiÀaE I L. r .SC ADD 3 t. i
fau6 <27:2a> <- S'^TUS/COITnOL nEGIS?ER (rC?tL
Dcod.l

386

o.tnl?t ERR SEt E tt th. rtct IRUE output oÍ rn tS
FLrp-FLo? rftrcà r. t.t by!
'rnrtE lus lnn f,' & 'Pf,ÀsE I L' 3 r8 CLr X'

z't

.Dd..3Gt bys
.rntÍr rus Bnn L. . .r clr x.

ËlHl"Sï,tj1trt*'-?"'..^ti.t"tt$S'lir':ïtï:ïP"3:
,.ÀDo nlc trÀ Dtr x. - D ?Llp-ru)p (FÀLLrrc edg. ot .B
clt L'l D rrPul:
.À!D nrc BxÀ r. r (.pt!?Etcf, x. + .ErÀsr I L.,

lh. flop l! E CLIÀR8D uà.n .ADD Rec EtÀ a. t3 F LSE.

3';lltr vÀL r' - D ?Lt?-!utP

.r" r* oaro ,. , , '
th. ÍtoD rr r _peán:o yh.n .stÀtus vÀLrD lt. lr !ÀLsE.
t.rus Jníon sEr r. - D ?Lrp-1rurp
1..'xff"
-.ttrs
Enton BtT x.

th. tlop t. E cíEtnED rh.n .Bus EnRoR prt Í. Ís FÀLSE.
l.aus rtn uTf,À? f,r - D lLtp-?LOp
D txPut:
(.R!ÀD CrC u. r ipnllElCl CtC L. r
' s"Àl I L' t r slÀlus YAL tli' +

'll's l.t urnÀP f,'
ttG flop t. DC CLEInED l!!
.pRoc lxtt a. +
('r^tcrED utnÀp ||. r .prÀsr I nr I .r clt L.,
f'tlTcatED UTR ?a. - D FLtp-?Lo? D rrpur!
.Utnlp r|. a .DO Sit,c L. r .paASE t L.
frtcv pEnn DtL Nr - D Flrp-rLop
D lrPut!

.ÀtrD nEG EN DEL l|r r (.DÀTÀ PBRR X. + .AC
VIO r.t
387

ttr Ílop lr E cltlltD rton .AD rE trtA DGL F tr ?Alst.
f'nttt lUt tll l' - D ?LI?-?JD?
D tr?Utr

.ltAD ctt L. 3 .8tAtt 8 yrt r 3 .EtAt I L.

tt Ílop lr E CtltltD lÍ:
.?lc tllt r o
í.rlltt 3ll 83t r 3 .tt^s3 I t
t.t
3lC E8o.. Dtl.Èo3r tfre VC ADTESS RtctstER tr . I
btt l.tcb 6lch lr rntblod durlngr
ot ctt r 3 .D cLr ltttlS t. E
8tAtlf/GftrOt ÀmtES REGISTBR <- rtns <27221> (rcrnL Deodcl
l ftt lnputr .r.s 'nUS <27221) l.
lAtGl Ortpott .ro3 'EC ADD (3:t) t.
3È.ter/Goatrol bglrtorr r
2.4
Srrcr
bgtrtorr ttr TAROR S|!iARï REGISTER ls a
2.C. t
I btt -rry
lttch rhlch lr enrblrd durtng:
.l cll t! 3 .D ctr BrtSl! f,. r
'8C ÀDD t l' o 'SC ADO 2 L' I 'SC ADD I LTT'SCADD'L'3
StAtt 8./coG?oL REts?3n <- rlt s <27s 2t) (fGtnL Drcodc)
tttCË tnputr .r.3 'FUS (2?:21) ['
qrtPut.
D

lllfl

.ros

EIC (3): 'DUS TRROR BII E'
Blt (2)r .t3 BRROR Bt? B'
Elt (l): 'ltt lrIÀL llt B'
ttt <r>r 'IE ttCË CËl BI? ï'

In rddltlon, th. tndlvldurl bltr rey bc ASïI|CBROXOUSLï PRESET
tnê/ot CLBARBD rr foltorr:
EIt <3> PRESEI IF:
.SET IOX ETTST [T + 'SET I'XCORR B! +
'SET CORR DATA II'
BIÈ <2> PRESE? I?g
.PtrAEE 2 CLÍ BT E

ta Brr I u' 3 'x8l r8 Hrr 0 H' e 'x8l u?RAP H'] +
[(.xBl
('nf ta Ërt I H'3'xBO
TB urr c [' t 'xBo urRÀP H')l +
('atT I n' e '[rr c H' t rExAft T8 €RR lt')

BIt PRESET IF:
388

.ttlst 2 ctt t. t
.I!l UtrAp l. t +
l!'I|f ta ttlLtcr3D !o e.D!
í'r| tl trtLtctSD !. 3
UtrrP x.ri +
('l trcl3D ta trAL l. 3 .!rAt t! tRR t t
tlÈ <r> ?l38tt t?:
'Ptt83 2 Ctt !. 3
ct o? tr3 ?ot,tctrc rtcno-tnApE ts DEtEeruD ArD rS
?t3 llGlSSt PRIOtIÍlg (ttt Lls?, DÀcD 17, !|ER!II,.
lolo19o23

ItÈ <r> cLtAn?D t?r
.Pf,AsE 2 Cltr X. 3
(TE O? ITB FOLI.CIIG TICRO-INAPS IS D3?DC?ED ÀXD tS
tlt AIGEEST PRIORI?!: (SEE Srctton 2.? EEREIII.
3t6t j

2.6.2

^ll

I Ettr .r. ASï'rcnROIOlrStï CL8ARDD rhcn .PROC tNIt lt. lc IRUE.
lU8 lrror lrglrtrrr
lho DUS TRROR REGISTER lg . I blr
r.9ltt.r coo.trtrt.d ef RS PtlP-FlI)FS.
REGIS?ER OU?PUTS ARD.

8lr (3): 'IOI EIISI tEt H'
Blt (2): 'UICORR DITA H'
Elr (t)r 'lÍr8l SRROR n'
8lr (t)r 'CORR DAIA H'
8lr <3> lr rot byr:
.sEt xox ExIs? l|.
8lr <2> lr ect by:
.SET UTCORR H'

Btr <l> le rcÈ by:
.BUS ERROR SE? H' 3
(.sET XOX EXIST H. + .SET TXCORR lt. + .SET CORR DATA H')

Blr <t> ls sot by:
.SET CORR DATÀ H'

3E9

Alt I bttr rrr ÀStaclRorotsLI RESDT vhcn.Bts ERRoR Btt H. ts
?AISB.

2.6.3

Prrlty lrror bgtrtrrr lhe PARTTI ERROR REGISÏER ls a I
blt regtrtor con.tructrd of RS ?Ltp-FLOpS.
REGIS?ER OUIPUï]S ARE:

.?AG I PERR BIt f,.
Blt (3): .TÀG
Blt <2>:
, pERn BfT [r
BIt (I>: .DÀTA
'DITA I PIRR BI? II'
Btt <t>:
t PERR EIT H.
^-Elt <3> tr rot by:
.SEI IAG I PERR U'
Blt <2> lr rct by:
.SE' IAG O PERR ['
Blt <l> lr ect by:
.SET NTA T PERR HI

8lt <t> tr rct by:
.SET DÀ?A T PERR ['
Àl I

I bItS ArC ASïtrTCIIROXOUSLT RESET rhcn .TB ERROR ERROR atT H.

Ts FALSE.

2.6.1

L.t bÍrrencr llt hrglrtor: Thc LAST REFEREICE HIT
REGIS?ER lg c onc btt latch vhtch ls cneblcd durlng:
. EXAN T8 ERR E'
IAITCB IXPU? IS: ('BIT I H' .roÍo 'tlt? C H')
IÀACH OUTPUT IS: rIAST REF llIT H'.

tïtc latch t8 ÀSI.IfCBROI|OUSLI CTEARED rhcn 'PROC tNlT H' ts TRUE.
Rrfrrrncr Cecbe Arly R.gl3torr Tlrc REFEREXCE CACHE OIILI
2.6.5
REGISTER ts a onc blt latch rhlch Ís cnablcd durtng:
rB CLtr B. t .D CLf, ENABLE H. T
'9C ADD 3 Hr t .Se ÀDD 2 H. o .SC ADD I nr E .SC ADD

oL.e

STATUS,/COIITROt REGISTER
Dccode)

ÍAICH IIIPUT IS: 'IBUS 21 H'
IAÍCH OllTPUl IS: 'DISABLE Ctt REG H'

39'

tttc latch ls ÀSÏïCIIROXOUSLï CLEARED uhen .PROC INIT H. is
lnuE.

2.6.6

rll sÈrÈur Regtrtor: the ,Gl srATus REGTSTER is a g btt
larch rhlch le eneblcd durlng:
:
IXBI ERR EXA HT

IAIlCB IXPUTS

.HIT E'
IHIT T
I H'
ISTAT I H'
.sTAt 0 H.
.Àc vlo H.

.TAG I PBRR H'
.TAG PERR H'
.DATA' PERR B'
.tÀlrcHED

tB UtfÀL H.

2.6.?

Ilf SCetur Reglrtor: Tte xBC STÀTUS REGISTER ls a 9 btt
latch ulrlch ts cnablcd durtng:
.XBC ERR ENÀ HT
'
I.ÀTCH INPUTS -> Í.À!CH OUIPUTS ARE:

.HIT I H'
.HIT
rstATCI H'Br
.sTA?
rAc vloC lt.
gr
'TAG I ;ERR H'
.TAG
PERR H'
.DA?À' PERR BT
.

tÀficltED u8 uxÀL H.

2.7

llcro firp Condtttonr: Thc f o I lorl n9 iICRO-TRAnS r re
'dctcctcd
and prlorltlzcd ln thc ordcr shorn: Sec P.ra.
2.8 for t\rncttonr:

(HTGHEST)

I.
2.
3.
I.
5.
6.

COXTROL STORE PARITï ERROR
FPA RESERVED OPERÀXD

TSRC XB T8 ERROR
TSRC B BUS TRROR
BUS ERROR

IflÀ&IGIED Uf,I8US DATA

?. tsRc xE ?8 trss
8. tsnc It Acv

9. IB TRROR
lr. t8 1186, READ
ll. tB tlss, rRrTE
12. ACY, RaAD
13. ACY, rRr?E
II. TRTTI CROSSIIIG PAGE EOUXDARY
39t

I5. TRITE UNLOCX CROSSING PAGE BOUT{DARY
16. UNALIGNED DATA, READ

17. uNALtcxED DÀ?À, rRtTE
18. uil^LtcNED DÀTÀ, HRTTE UNLOCK
19. BUT XB T8 ERROR
28. BUT XB BUS ERROR
21. BUT XB T8 ntSS
22. BUT XB ACV
fllcro Vector asslgments shall be tn accordance uith UTR Table 2.
U?R TAITE 2

+-------+----------+
I rlcno- f .wEcToR
I
tRP| | 3[. | 2E. I r U. I tB. I
f+--------+
------+------+------+------+
lrlLlrfulr,
+--------+------+------+------+------+l
l2lHlttfrlrl
+--------+------+------+------+------+
l3lttltlrlul
+--------+------+------+------+------+
f{lHlulrlrl
+--------+------+-----+------+------+

392

U?R fllLt

2 (Contt
+________+______
_____+
I llcRo- l 'uvEcïoR
I
I TR^P | | 3 U. | 2 8. I I H. | | H. I

+--------+--____t______o_____ - t____-_+

lslntLtrtrl

+---_____o______+______+______+-_____+

l6lulrtrlrl

+-------_+-_____+______+______+______+

lTlttLlHlUt
+--------+------+------+------+------+
lSlr.
lLlnlnl

+--------+------o---___t______*______+

l9lrlulr,

lrl

f--------o------+------+______+______+

lrclrfulHlLl
lrrlnlrfHlHl

+--------+______+______+_ _____+______+
+- -------+------o------a------13-----+

l12

lnlrlulr.

+--------+------+--____+_ _____{______+

13 l H l n
ra I r I n
+-l
I

l n f n l
H'| lt___.r
I _____+-__

+--------0______+______+______+______+

----__+______t______t_

l15fLlBlHlrl
+--------+------+------+------f

------+

l16
ltltltlnl
+--------+------+------+- -----+---- --+
lrTlslttfrful
+--------+------i--

----t------+--

----+

lrslrlrlllrl
+--------+------+- ----+------+---- --+
l19
lululrtll
+--------+------+------+------+------+
-.

l2clttlrlLlrl
l2rlnlrlLlnl

+--------+------t------+------+------+
+

--------+------t------0------+------+

,22
lnllrlr.
lnl
+--------+------+------+------+______+
Itcro-trep hnctlonr: Às spectf ied heretn.
2.8
CONTROT STORE Pl lf ERROR ilcro-Trap conóltion exlsts Íf:
.Etfc UTRAP 2 lt. t .Eltc utRAp I h, r .Eltc UTRAP e H.

393

FPA RESERVED OPERAXD ticro-Trap conditlon erists

if:

.Erc U?RAP 2 N' E 'ETC UTRÀP I H' E 'EXC UTRÀP E L.
iSRC XB ?B ERROR tlcro-Trap corÉltton crists

if :

.isRc n H. e

UTRÀP H. r
Í.xBl
('XBl

TÀG I PERR H' + 'XBl TÀc O PERR H. +
'nl DAtA PERI t|' + 'XBl iUL? HIï H.t +
.XBI UTRÀP H' I
('XB, TAG I P€RR H' + 'X3A tAG a PERR tr' +
.XBE DATA
PERR II' + 'XB' IULT HIT II''I
llSRC XB BtS ERROR iicro-Trap condition erists if:
.isRc xB H. t
Í('XBl UTRAP n' r 'XBl STATUS I L.) +
('XBC UTRAP H' r .XEt STA?US I L.) |
BtS ERROR iicro-Trep condition exlsts if:

.BUS ERÍi UTRAP H'
t NALrcxED uxrBus DATA tti

cro-Trap cond l t ton cx isrs i t :

('XBl UB UNALIGIED H' e .XBl UTRÀP H.) +
(.XBC UB I'NAtIGXED H' I 'XB' UTRÀP H') +
('IATICHED UB UXÀL H. 0 .BUS UTR^P EIÀ H.)
IISRC XB lts t| ISS tlcro-Trap condltion exists if :
.nsRc xB H. t
[ (.xgl UTRAP H. r .xBl ?B itss H.) +
('x80 UTRÀP H. r .x8o T8 rlss H.ll
IISRC XB ÀCV t|icro-Trap condition exists if :
'I|SRC XB Hr t

Í('XBl UTRAP H. r .xBl ACV H.; +
(.x8e UTRÀP H. o .xBe Acv H.)t
TB ERRCR lticro-Trap condltion erists if :
.BUS UTRAP ENÀ H' T
[.TÀG I PERR HT +.TÀG e PERR H. +.DÀTÀ PERR H.
('HlTlH.t.HIT0H.)l

39{

tl rl8E, ftAD tlcro-Trtp eotÉltton erlrtr ffz
.lt: ulrr? tr F 3 .t tttBD tt s l'L. .
.lltlt.3.tttrL.
tl tl8t, Íft?3 tlcro-trtp eorÉttton crlrtr lf :
(.1t6 ttllAp llA r. 3.t t\ciSD lus ! r.t r
Í(.tr? I L. 3 .rlt I Lol +
(.t lt? L. 3 .tl PAlttt tlA t.l I
ACYr tt D llcro-trrp corÉltlon erlrtr lt:
.ry t3tn D3L !. e .AC ylo !. t .llgeitD lus 3 L.
lCY, ínlt3 llcro-lrrp colÉltlon orlrtr lÍ:
'ACY PtRn DCL tr. e .AC ylo X. t.tAïrCltD BUS j n.
rnt?E cRoS8lrG PAGB lournRr ticro-trrp corÉltÍon crtsrs Íf :
.!u5 UtRAP 3tA f,. 3
.N UTRAP 2 L' 3 'Erc UARAP I N' 3 'Erc U?RAP L'
'
fRl?t UtftOCI CROSSTIG FÀGE IOUiDARI tlcro-?rtp condltton crlsÈr
It r
tttRAP EIA tr e
'ttt6
.8 UTNAP
2 L' T '8rc U?RAP I H' 3 'EXC UTRAP C Hr
ITIALIGIED DAIA, READ ilcro-trrp eondltlon crÍtts lf :
'llrs UTRAP llA f,' r 'lAt\ClED BUS 3 L'
.EXC
U?RAP 2 L' O 'EXC UTRAP I L' T 'EXC U?RÀP
H'
'
ITIALIGIED UtA, IRItE fïcro-trrp condÍtion crlctt tf :
UTRIP EIA [. e .IAïICI|ED 8US H.
'EUS
.GIrc U?RAP 2 L. t .EXC UTRAP I L. 3T .EXC UTRAP O H.
UXAtIGXtD STA, IRIIE UXLCi tlcro-Trep condltlon crlcts if :
.BIIS UTRAP EIA II' 3 OIA$EïED EUS 3 H'
'EIC U?RAP 2 tr' t '8xC UTRAP t L' c 'ExC UTRAP t H.
BUt n lt ERROR tlcro-Trrp conditlon crlsts tf:
.tsRc rl L. 3
[.rEl U?RAP A. 3
(.xlt ?Ac t PERR B'+ 'xBl TAG PERR H. +
' H') +
'IEl DAIA PERR f,' + 'XBl IULT HIT

395

.XBE UTRÀP H' &

('XBe TÀG I PERR H. + .Xge TÀG g pERR H. +
rXBe DÀTÀ
PERR Hr + .XB0 |IULT HIT H.)
I

BUT XB BUS ERROR ltlcro-Trap condltlon exlsÈs if :

.isRc xB L. t
[ ('Xgl UTRAP H' t 'XBl STATUS I L.) +
('XBe UTRAP H. r .XBo STATUS I L.) I
8UT XB TB |{ISS lttcro-Trap conditlon exlsts if :

.ltsRc xB L. t

[('XBl UTRAP H' t 'XBl TB ]IISS H') +
('xBc UTRÀP H. r .xBo TB lrtss H.) |
BUT XB ACV lltcro-Trap rcondition exists if :
.ltsRc xg L. t

[ ('XBl UTRÀP Hr & 'XBl ACV H') +

3.3.8

('xBc UTRÀP H. r .XBe ACV H.)l
\
UVEC11OR REGISTER
Ttre UVECTOR REGISTER ls a { bit latch vhich is enabled during:
. TATCHED UTRÀP ;L. t .UTRÀP H.
Tfte outputs of the'latch, 'uvEcToR (3:0) lt., contaln the t{lcro
Vector of the HIGHEST PRIORITY I,IICRO-TRÀP detecÈed uhlle the latch
ls enabled.
Chtp OuÈputr:
'

'ENÀ uvcrR Hr H.

and ts TRUE (HIGHI tf :
' DO SRVC ll'

('UTRÀP L' t 'ElilC UTRAP 0 L' t

'I{ICRO VECTOR I H' & '}IICRO VECTOR O H'} +
(ruTRAP H' E 'UVECTOR 3 H')

.EXÀ UTrcTR HI H' T 'DO SRVE L'

396

rnd te IRUE (BIGHI tf:
(ruTRAP L. t .i BIT lt. t
.nrcRo vEc?oR
I H. 3 .iICRO VECTOR g H.) +
(!uTRÀP ltr t .uvEcToR 2 H.)
. ENA UTrcTR B!

and ls TRUE (HIGHI tf:
.uvEcT|oR I H.

.ENÀ UVCTR Hr

and le TRUE (HIGlt, lf :
.uvEcToR c H.
. ENÀ tÍ8us ll.

and ls TRUE (BIGB, lf:
('?AG I PERR 8IT ltr a.SC ADD 2 H. e .SC ADD I H.) +
(.ilol| ExIsT ttEt H. t.sc ADD 2 L. t .sC ADD e H.) +
('BUS ERROR 8rT H. t .SC ÀDD 2 L. t .SC ADD g L.)
.ENA HBUS H'

and Is tRuE (HIGH) lf:
PERR BIT H. e .SC ÀDD 2 H. r .SC ADD e H.) +
('UNCORR
ADD 2 Lr t rSC
' DÀTÀ H' r 'SC
0 H.) +
.SC
(.T8 ERROR 8IT H. t
ADD 2 L. t .SC^DD
ÀDD 0 L.)

(.TÀG

. EltA rgus H.

and Íg TRUB (HIGH} lf:
('DATA I PERR 8lT H' t 'SC ADD 2 Jt c .SC ADD 0 H.f +
('LOS? ERROR H. t .SC ADD 2 Lr t .SC ADD 0 H.) +
('uB UNAL BIT Br t .SC ADD 2 L. t .SC ADD L.)

39?

'lBus 21 H' (TRr-srÀTE, Bt-DtREcrroilÀL) is enabled tf:
. ENA MUS HI

.nd ts TRUE (HIGU) lf :
('DATÀ C PERR 8IT H. r .SC ADD 2 H. r rSC ÀDD e H.) +
('CORR DATA f,r O
ADD 2 L. t rSC
0 H.) +
.SC ADD L.' +
('xB tAcH cBtr BtT'SC
lt. t .sc
ADD 2 L. r^DD
('DISÀ8LE CtI REG B. t .SC ÀDD 2 B. r .SC ADD I H.l +
(.[ÀST REF HIT H' T 'SC ÀDD 2 H' t 'SC ADD I Lr I' rSC ADD e L')
'GEN DEST IxB L. ls ?nUE (tOq tf:
TUTRAP PEND H' r
Í.DO SRVC Hr +
(UNALTGIED DÀtA, rRrrE uxtocr and/or any HTGHER pRroRrry
Itlcro-Trap condlttona crlety I

'fIHIBIT CllI 8' ls TRUE (ltIGH) .tf :
'DISABLE CiI REG H- + (.RtUT DIf,H U. r .PREFETCH L.l +
TPREFETCH H' T
['AC VIO Hr +
rTAG I PERR II. + .TAG C PERR H. + .DATA PERR H. +
('HIT I H' t 'ltIT e [.t +
('HITIL'e'HIT3L.)l
'UTRÀP L' ls TRUE (LOU) lf:
.UIRÀP HT
TTRITE BUS ERROR rl|T L. ts TRUE (LOíl tf:

ITRITE BUS ERR HT

39t

Erc Utn^p I L --->rlt
Erc urnÀP 2 L --->rr2
utRÀp L <___tf 3
ttcRo yBctloR 3 E <---ttt

Ptz cËBcr oR pnct f, --->tls

tlcno vScTroR I f,. <-->tl6

t8r<___ ÀDD REG.Ef,À L
atia___ AcY n
t6r<___ TB ntÀ PERR H
asr<--- tatclED Bus 3 ll
ttr<___ i BIT B

a3t<--_ TE PARITï EXA H
t2t<___. tB BtT I H

rlcno vBctoR t f,'<-->tl?
nlcRo yBctoR 2 E <---tt8
GEX DEST IIB L <---t'9

tlr<___ T8 BIT

I't<--- T8 IAG t' PERR II

DO SnyC L

--->tl, o...o.. 3gt___) ïRITE BUS ERROR IXT L
rsRcEf,___>ttt.
.3gt___-cnourD

LID. 3?t<--- tB tAG PERR I
.
D(rrx. 36t<--- t.ÀtcIED ' rc?RL I f,
----trr
!rc9
EXCU?RÀptL--->tlt.
I'GA ----ttz.

rclnt ntt.rrx L --->tl5 ..oo....i5i:___cnowó-3at<___ tarcxBD rc?Rt I a
xa stLEcT U --->tl6
33t<___ tÀTcxED rc?nL 2 H
rf rr ust L --->tl?
32t<___ D elt Ef,ÀBLE Ë
PROC IXtt L ---> r l8
3l t <__> mus 2t H
RTtJt DIXU L --->rrg
3tt<_-> rBus 25 rl
stATus 3 I --->r2t
29r<__> ISUS 26 r
s?A?us I Ë --->t2l
28t<__> rDts 27 A
s"Atus VALID L --->r22
27t<--- p[À88 I f,,
Et tr lrsE t --->t23
26t<___ pRtFEttcn t
B CLX L --->t2t
25t---> Ixf,IBIT Crt B
UTR IIGURE I

PIX COXFIGURÀTIOX DIÀGRAi AXD PIX TDEXTIFTCATIOII

399