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Document:	PDP-7 Brochure
Order Number:	XX-E6A34-89
Revision:
Pages:	12
Original Filename:	http://bitsavers.org/pdf/dec/pdp7/PDP-7_Brochure.pdf

OCR Text

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PROGRAMMED DATA PROCESSOR-7 (PDP-7) is a general purpose, solid state, digital computer
designed for high speed data handling in the scien tific laboratory, the computing center, or
the real time process control system. PDP-7 is a single addre ss, fixed I S-bit word length, binary
computer using J 's complement arithmetic,and 2's complemen t arithmetic to facilitate multiprecision arithmetic. A random access magnetic core memory with a complete cycle time of
1.75 microseconds is used to achieve a compu tation rate of 285,000 additions per second.
Other features of the basic PDP-7 system include:
INTEGRATED CIRCUITS lire bas ic elements of the low cost, newly de~ i gned silicon FLIP CHIP modules used
throughoot PDp·7. Cost of spares is reduced.
FIELD TESrrD SOFTWARE includes an advanced FORTRAN compiler, a symbolic assembler , /looting point

arithmetic . an d program compatibility with the field tested POP-4 program library.
MODULAR DESIGN permits the addit ion of peripheral devices simply by plugging in modules and cab les.
COMPREHENSIVE I/ O CONTROL. as supplied, conr>ecls to 64 input and output devites and includes an
Input/ OUlpUI Control, a Program In terrupt, Data Interrupt. I/ O Trap. I/ O Status, I/ O Skip and Real Time Clock.
Eas ily expandable to any size.
I/ O TRAP hardware suppli ed to permit the prog ramming of a time·shared system.
MUtTlPLE AUTO·INOEXING using eight memory locat ions simpl ifies programming and increases tha speed
01 table look·up and other routines.

FULLY PARALLEL internal ope rations simpl ify maintenance and irn:rease reliabil ity.
DATA INTERRUPT at data transfer 'ate s up 10 570.000 words per second with direct access to cOre memory
and withoot disturbing a rithmetic registers.
PROGRAM INTERRUPT frees processor from time· dependency on e<ternal devices.
ENVIRONMENTAL TOLERANCE permits computer and peripheral equipment 10 operate wilhou t air condit;oning
on lI 5 ± ID vo lts AC, 60 ± O. 5 cps.

ASCII STANDARD g·bil CODE is used with Model 33K.SR teleprinter.
ECONOMICAL MEMORY EXPANSION up to 32,768 words is provided for.
READ·IN SWITCH loads a block of words from binary paper tape Into memory and initiates program e.ecut;on.
HIGH SPEED OPERATION with a memory cycte time of 1.75 m;croseconds an d add time 01 3.5 microseconds.

PROGRAMMED TAPE CONTROL permit$ program oontrol of punch power.
INDIRECT ADDRESSING $imp lifies subroutine linkage.

MICROPROGRAMMING saves program execution and preparation "me by coding instructions capabte 01 mUltiple operations.

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F'IIrattel ~ration and !>",.Ilet d.t. flow u.i"!! i"'", rate<! Buitt ,nto each POP·7 ,. a n e twGr~ for mO'lI,nat , .. I 01
ci",uit modu le....ure th" hi,tIe.t <!ei"'" 01 compute' eomputo r .ub·.,d;"" ._ Two features 01 tho ""'rainal tut
reliability possible. Alt modutes. sub ..sembll.s and lhe-n system rnako! "",t,n, chec~' ,..I and accurate: Tile mar·
tile ~MI computer are ii.en a thoroullh "51 and chec~·OUI ,inat ched, YQ~.ge 'S conllnuously .aMable, and olt wo"'before beinll retNOsed.
inll "'Bisle.. ore displayed .imu~ar>eollsI1 on ttle consot.
ti,ht._

BASIC PDP·7

Tile baSIC PDP.? is a highly effective system in a minimum configura/Ion. The basic PDP.7
includes:
Cetll •• , P,oc ....o. and CoIIlrol ConilOIe
4096 Word Core Memory
Inpuf/ o...rpur Control with
DevICe Selector (up 10 64 I 0 cc;nneehons)
Inforrmlioo Collector (..... en IS-b't channels)
Inforrrnollon D,st"blttor (sox 18-blt channels)
PrOCr3m Interrupt
Oat. Intl!frupt
1/ 0 Trap

I/ O Skip Facility
I/ O Sta tu s Check
Real Time Cloc k

High Speed Paper Tape RNder (300 cps)
Hieh Speed Paper Tape Pllnch (63.3 cps)
KSR 33 T.. I..",'nr~ 00 cps)
Proe.ammlnB Aids

fORTRAN eompole.
Symbolic Assembler
Ed Itor
Debugging System
Ma Intenance Routines

Lib.a..,

f-----------------,
...... _
00:0_'._
:

r----- ---- -- -- ------/±tJJ
I

:
I

LlIIII
:'''m
OI[Q<STVO

I
II

~11

WJI
~

J
'"

L---- - ------ ---- --t~~ - ------

PROCESSOR
The processor ped ofms logical and .,,!hmelle func tions, provides ;>eeen to a nd I.om memory Bnd con·
trois t hl! flow 01 dat. 10 and from the computer . 1\
consisls of lila prOCI!$"'" cont ,oI. the memory.
men1OI'Y control and st. other act,ve reg,st".s (see
dlllgram).

ACCUMULATOR CAC) ;s an IS· bit rea'ste. willet! per.
larms a rithmetic and log;';al operations on lilt! dala
and acts n a Iransle. resister Ih.oo&h which data
paS5e$ 10 and h om Ihe 1/ 0 buffer rel"Iefl.

LINK (t) is a I ·b,t 'ee'S!e. used 10 extend the a. jl"·
metic I",iltly of the Kcuml,ll<llOl .
M(MORY ADDRfSS RfGIST[R (MAl 's, 13-bi' rill_
isler which holds the address 01 I he to<e memory

cell currently being used .
M(MORY BUffER R£GIST£R (MB) is lin 18·M .ea·
iste. which Ktl U a buller lor all jnfor~',on sent

to or received f,om memory.
INSTRUCTION RfGlSTER ORI " a 4 ·bil regl5te r
which IloIds the operalion code of the Pfogram in·
structio... currently bei ... S performed .

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_______ -1I

PROGRAM ,'OUNTfR 11'(:" . a I3 ·M rel,ster which
holds the address of Ihe next memory cell from which
an Instruc tion is to be ta ken.

MEMORY
The hllh speed raodom access memory il a 4 096
word cO"ICKIenI-curr\!flt core module w,t,", a c)'tle
I,me 01 \.75 mICroseconds. In ooe c)'tle the memory
control rel"eves a ... 18·b,1 word s tored i... the memory
cell spe<:ified by the memory address rell'ster. writes
the word by a parallel transfer i... to the memory buf·
fer regISle r. and ''''''files Ihe word into the same
memory cell.

INPUTjOUTPUT CONTROL
The I/ O control Io ... ks up to 64 input and OUlput
statoons by lines to the cenlra l proc"ssor . ca lls the
s tat ions. and coileclS a ... d dis\"butes the inpul/
outpul data . It alSO conl rols Ihe inlerlea.''''11 of data
du""" a data i... teflupt .......ses the s latus of I/ O
devICes and s kips inSI,UClIOr"lS ~sed on th,s ~alus ,
I"ps lOT (i ... pul-ouIIlUI.1,lInofer) .nst,UChons in,Io"I ·
ine: a program break , and generat" TNI t'me s'anal
pul ...! lor use by e.le."" peripheral equ,pment.

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~ """"".
.':;~.;;

r
.....'..,...
"~ J[~

,,
,,,

. Ir "---••

- -r .. _.-tc;::::
.
=.. •
~.-

•

....

~.~; -

0
0

J..
'....-

?-;,
•
0
0

-:~

,.::::.

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0
0

..... 1 __

--- ---- --- - -- --l
......... 0

. - . I_
.~

I
I

t ........

~.-

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.. .. ..

CENTRAL PROCESSOR OPTIONS
Core Memory Module TYP" I f7 utends tile memory
uPI'C,ty of the PDP·1 from 4096 words to 8192
words.
Cor .. Memory (denSlon Control Type 148 allows the
e~ pansion ollhe POP.1 memory from 8192 to 32.168
words in ine rements of e ~her 4096 or 8192 words.
using the Type 149 Memory Modul es. The Type 148
lneludes an b lended Program Coon!er. an Eltended
Memory Address Register. and an (.'end Mode
Control .
(den~ A"lhmel,e £lement Ty~ 111 is" st,,'~rd
opIion lor the POP.1 whH;h f<'(;ilitates h'ah ·speed
mult,ploeation . d,vislOn. !oIIiftina. and realSte< maniPIJ·
la"on . Instal~ tion 01 the EA£ adch lIn 18·biI rea:ister.
the Mulhplier Quohenl Reg,ster (MO) to the computer
'" well as a 6·bol $t~p counter reaister . The contents
01 the MQ rea,st"r are co)nt,nuously displayed on
the operator·s eons.ole just be,,,.. the accumutator
,nd;e.tor, .
The Type 111 and the baSH; computer cycle operate
uynehronously. permitting computa tions to be per·
formed In Ihe minimum possible time . Further. sinee

the EA( inst ruc' IOnS are microcoded. several oper3.
tions can be performed by one instruction , thus
simplify,ng assoc,ated P<OIramminl. Average mu~i.
pli<:ahon time is 6 .1 ~ sec. a~r8l1e divISion time is
9. 1 ~ sec.
Au toma',c P"o"'y Interrupt Type /12 inereases the
capac ity of Ihe POP·1 to handl" trans fers of in forma·
ti on to and from input / output devices. The 112 iden.
tifies an interr upti nll devi<:e d irect ly. wit hout the need
for flag searching. Multi ·level inte rrupts are permis.
sible where a dev,ce of hillher priority super~s
an interru pt "Iready in process. These funetions in·
crea se the speed of tile input / output system and
SImplify the prOilrammn'l. More .nd luter devi<:es
~n therefore be S<!fVH;ed effi<:.enlly.
The Type 112 cont.. ns 16 autOtNtH; inlerrupt chan·
nels .rr"niled ,n " prlof,ty Chain .0 that channel 0
has the hiihest prlof1ty "net channel 11. has ' he
lowest priority. The prIOrity cha,n guarantees that
if two or more in.out devi<:es request lIn interrupt
concurrently. the system lI"nll the Interrupt to the
device with tm, hi8hest prIOrity . The other interrupts
will be serviced afterwards in priority order.

PROGRAMMING SYSTEM
The POP-7 P'08.ammong Sys' em meludes aO advanced
FORTRAN Compote"

a 51"'0010;: Auembll'l'. Ed,'or.

DOT Debuuona System. Ma,n'eNnce routmes and
a library 01 . ", hmeioc , utIlity and PfOiramming a,ds
deV<lloped on the program·compat.ble PDP·4 . 80th
Ihe Ed,lor and ODT a . e designed to a llow symbolIC
debull.8.n& and computer.alded e<hl,ng 10 'epllM:e 'he
tedIOUS manulil equ,valwl. New aJ'ld updated pro, ' Ims a.e be,nl cleYeloped con[,nuou..Jy In tilt! ap·
phed p.ograrnm'fl' departmefl'

Symbol;c Assembler lets the prog, amme r code in·
structoon. on a symbolIC 'anauaae. The uS/lmbler
used on Ihe pop 7 allows mnemonIC symbols to be
u$ed lor ,ns,rvc"on codes and addresses. ConSllIn.
lind variable SIOfaS" ,eg,stefS Un be automalocally
lISSIgned . The U$\!mbler produces II bm:of)' object
lape and I"IS a symbollab le "" Ih memory allocatIons
.. nel useful d,/Ignos' ,c mesS.)ges

D'I"al Debuq'". Tape (DDT) weeds progr~m ~
bu",nl by communlcatlnl WIth the u...". In the lid·
dress symbols 01 the SQUrCt! tanlu",e progr.m
Program debu88lng tlRle IS lu rt her . hortened when
using DDT bec~use program uecutlon and modlfica·
tlon are conI rotted Irom the teleprinter keyboard. for
exa mple. 1':1 bf.lICh to, r>ew localoon in the program
il is only necessa'y 10 type the symbolIC toe.l_
na"", on the keyboard totlowed by the CMrxter.
Single quote
The ... me symbol lottowed by the
ch'racle<. slash ( ). causes Ihe contents 01 Ihat 10'
cal ion to be typed By us,ng DDT 10 IOsert bfea k
pornts In a p' ogram. Ihe pr08rammer can make
correct""'. 0< inserl p;1tches and try them out .m
mediately Wo<k,nl correctIons Cin be punched out
on the spot In the Io<m 01 Io;Idabie p;1tth tapes.
ellml""lIng lhe necesSIty 01 c reallnl r>ew symbolIC
tapes and reassembllnl each lime 8n error IS lound .

Symbolic Ed,'or permits the edIting of $OUr.:e Ian
1\IlIIe programs by add,"1! 0< delet.nl lines 01 text
All modllic .. tlOtl . read.ng. punchlOl . etc . IS cont,0I1ed
by symbols typed al lhe keylx>aord. The edItor reads
p;1rlS Or all 01 a symboliC t,pe Into memOty where It
is a.a.lab le lor immediate e.aminatlon. corroction,
ar>d reliSlln&
FORTRAN CompIle< used WIth 1"- PQP·7.s based on
the lield proYe<l fORTRAN II used wllh POP-4 .nd ,.
desi&ned lor prol'amm,nl flexlb'lIty ar>d operaMI
efficiency. fORTRAN permllS the POP· 7 use, w,th
litlle know ledge 01 the computer's o.gamnllon and
maclllne language to w"te ellectlve program s. Pro
lrams are wflllen in a 'anluale o. lamllia< [nlllsll
words anet mathematICal symbols. Compll .. t_ of the
orlllnal fORTRAN SQUrce pr08ram IS perrOtmed $Ilparately from Ihe compilat,on 0' aS$OCiated sub,outlnes .

•

Thus when e.-rors In fORTRAN codIng a . e detected
by Ihe compIler dIagnostIc. on ly the errOneous pro·
Inlm need be recompIled. PDP FORT RAN fea tures
include tile follOWlnlil

mew POINT CONSTANTS
1·6 decImal dll'lS absolute v.l"" < 131.071

nOATlNG POINT CONSTANTS
10 decImal dIg '" precIsion. Exponent ranle
2" I to 2" I.
SUBSCRIPTS
Any arithmetIC e .pression r.presentlng an In·
telle, quant'lY: Variables m , subSCript mlY
themselves be subscropl ed to any depth. N di.
menslonal a rrays are perm 'tled
STArEMENrs
M .. ed e>:jlfesSlonS cont81nlnlil boIh lixed and
floalmg POOnt variables are pe<milled_ A
mum of 300 Cll.,xte,s a'e . ,Iawed (statement
nllm be rs IIOt counted) .

ma.'·

STATEMENT NUMBERS

' ·99999

fUNCTIONS AND SUBROUTlNfS
Subrouti nes not conta,ned In t he f ORTRAN library m,y be comp"ed by the use of Function
,001 S<Jbrout,ne statements. Functions and subroutines may be fi_ed or floating point values u
delined by ,n,t,al len er ot F.type fundion con·
ventoon Argumt!flts may be a rb,trary ari thmetic
expreSSions. includ,nl functions_
INPUT AND OUTPUT
OECta"" (O'I,lal"s Moc rOiape system). malnetic
tape. ~per tape . teletype. d,splay. Format may
be spec:lfied by use of a FORMAT sUltement .
STATfMfNTS AVAILABLE
ArithmetiC sta teme nl$, I/ O state mentS wltn FOR.
MAT. 00, DimenSion. Common . tF. GOTO.
Asslln. eon' onue. Call . Subroutine. Funchon.
Return .
TYPE OECLARATIONS
Va"ables may be decla re<! as real, in teger. and
FORTRAN Variab le names are ] ·6 a lphanu meric character._

INSTRUCTIONS
Mf!mOry Refff*\Ce ,n srruetoons Inctude a ,,'lIme
IIC. IotlCat. 0.11 handline. and procram control
instructions. A memory . ddr"n (bits 5·17) "
.pecl fied u part 011 memory " I, rence inSlruc .
l oon. Tile contenls 01 Ihls memory address ."
use<! by the processor on l~fCut'nllhe ""Sl rue,
11OIl. Brts 0-3 contain the ,nstructoon code and
bit 4 Slenilies that the address IS to be Ind,rect
Most memory relerence In5trOOI011' require two
computer cycle. (3 _5 microseconds). The first
cycte ~cnes the instrUCt lOll it~ll . The second
cycle ~ches the data addressed and execllles
the instrUCIIOll. All memory reletel'lCe ins true·
loons can be eucuted Indirectly
Operate Clils InstrllCloons , r. mic rocoded in·
StrUCt ,onS used 10 shift . s kip.• nd compt.menl .
Bit s 5·17 specl ly whICh operation the procelSor
IS 10 pe1'fOl"m wherl e. ecutlnl Ike instruction
Each bot local lOll represenll a unIQUe operallOll
For I!.lImple. a I In bol Ioutlon 5 ,s , ke code to
clear the accumulator duronl lhe e _ecutlOll 01
the operate Ins' ruct ion . A number of different
operat lor'ls can be performed simultaneously by
cod,nl (selectlnl) _ r.1 b", In Ihe same
InslrucllOll
Tile Law 1nsl'II(:I,,,,, "'-<fI lisell onlO Ihe ac<:u·
mutator It provides a muns of Ioad,ne I nell '
I've const.nl wll hout Ike need of a memory
refe rern:e \0 lei 3 stored eonSlant. Two com·
man uses of law .re sethng up word counts In
mag lape transfers and preset11ng the clock
lOT (,npul 'Olllpul &; tran./er) Instruel"",S en,
a ble the PDf'·7 to communicate Wllh exte",al
tlevices. se<>dlnl control ,nformal,on and tran.,
fe rring data, Certa in central proceUQr (om·
ma nds. such IS the clock Instruetoons .• re .Iso
In the tOT cia .. Tke lOT ,nstrucli"" is mICro·
coded 10 Simplify protrammlnl lor I 0 trans·
len. For .... mple . curlllC lhe AC and IoIdlnl
• device oo"er . re done In one ,nstruction. The
ten bII s used for devICe aod mode seleC tIOn
prOV ide 1024 possib,lIt ,es. The lormat of the
InstrUCtlOll IS as toltows '

MEMORY REFERENCE INSTRUCTIONS
OPERATION
call ... btoutI .... T is I s _
Jmt 20" bil4 = 0. Jmt IlO iI bil4 = I .
~ AC. C(AC) ..
CIT)
jump to ... bn>uti .... C(PC) '" > c(y. ,,).
C{l) =
CIT,) . Y
I =
C{PC)
"'posit
ml"""Y. 0 '" > C(Y)
"*I AC. CIT) "'" > C(AC)
...1....... 011. C(AC) V C(Y) '" > C(AC)
_
U·, tom".. ...... I). C(AC)
C(T) = > C(AC)
2·, complement _ . C(AC) C(T) = C(AC)

"",'n

-"
~,

0_l1l<I.
1_ _ ond .... P it 0. C(T)
I =
C(T). ~
c(y,
I = 0. _
C(PC)
I =
C(PC)
AND. C(AC) II C(Y) =
C(AC)
oklp if AC .nd Y d.w.<. II C(AC) "1'- C("(). til ...

+ >
+ >
>

"''"

C(PC)
I = > C(PC)
lump. Y = > C(PC)

_
..
... _--

OPERATE INSTRUCTIONS

._.. .
,

•••

,-,..,
••

..""
*.
••

Of'{RATION

,,'

""'

.......
'"'

•
'"

....

...

"*I AC "om ..."' .....
C(ACS) = > C(AC)
"""e AC
IIn~ lIlt 0tHI pi""
C(AC,) = > C(ACH I. C(l ) = > C(AC,,}.
CCAC,,) = > C(l)
.... , ~n '" tl>en til. 0
Cell. tI>on til
totote AC .. ft twiu. s.mo
two ...

+ ............'
>
'If.
>

d..
e-pI
dpi

I..
db<

t.....,.......... _ ...
in ... . . . -

bit. 0 ""

...-pIooce t,," C(At) _

tho C(MO)

,epiaoo tho C(At) .. '110 .... C{SC)
<10 .. MQ
pi"", .1"oMe ...... ot At In tho AC
pI..,e AC ,il" In lin • • "" \.I .... Iboolu t••• Iu •
01 AC
inc'usive 0 11 t ... SC Into ' ''" AC
Inclusive OR AC
MO.nd 0\0<:. ' ..... 11. itI At

."tII

OPERATION

......nd ..... -" chon_
....bIe
chonnol(.)
.....bIe _
"'" ch.nnol{,)
.... bIe
itJ Into .... "pt .yo' '''''
d ... ".. . ulom.tic ptlofit)' In,..,ruP! .yotom
In~l.t. ",.. 10 011 ..... "'" ch.n",, 1 (lot
m.in'o",nce po,potot)
_ _ • ... R.,u,~.IIIt""'t priority chonnol

MIoct_

."Iom.".......

lOT INSTRUCTIONS
MN t MONIC

OPeRATION

> RUN

Proc",m Int."upt

, kip on '..,0 AC. S.lp It C(AC) = _iti .. ....,

' kip on non·,'''' AC. Skip II C{AC)
positi ...
. klp on positi . . AC. SOlp " C{A~) = 0

"'0

N ip on nept;.. AC. Skip" C{AC.,) = I
...,.. on ...... liftll. $Iolp if C(l) = 0
,kip on _ ...,.., IIonIl. S"'p II Ctl) == I
oklp.
oklj>
cIoo, ~n ll. 0
> Ctl)
....... linIo..l => l
c ...... AC. 0 = > C(AC)

A""".,.

MNU,ION K:
OPERATION
_
bOIic £II( convnond _

•

.... . . -

) ~_"'M<I

EAE INSTRUCTIONS

) txt"", _

totote At
0tHI pIooo.
C(AC,) = > C(AC, oJ. C(l) C(AC.).
C(AC~) =
C(l)
cIto. (;nil. _
0
C{ll. _
...
..,..,.AC .....

Io!
Ion
ton

Ions f"i&!lI. ohift
IotI& fishl .... ift. oic""'"
Ions "'" "'ift

_."on

'",n 011 Int .. ",pt
' " ,n on inte""pt
tum on It.P • • 1.., 'u.n1 011 I>'"","m in"'''up!
10 [ qu,_t

.......,t

Ioto

,~><I

clll
clol

.... P ~ doc. ft . . is I
tum 01'1 c"", ... CleO. dOCk ft . .

c"'"

...,.,. oj iO oqu •

'""

tum on _

..... cloc ~ Ills

Pop*. T.p* Rwclef
~

I,"

d ivi<l. C(AC.Ad 101 0).,.36·1>/1 un olln«! numtoo.
C(AC.Ad MQ) . . . 3-/,. 1>/1 , ., .omplom<tnt
... _ nu"'too.
itI' _ _ un"'_
Im_ dMClo. oIInO<I

to _opt;" 0I1tO

.,,',
Ito

muHiply un'~M<I
muHiQiy ,i,nltd

PRIORITY INTERRUPT INSTRUCTIONS

-- u_._.
M

_ " , ' " .... .. ",!tt is ..
_ I .... ol ......

MN( MOf'IK:

......
C(AC)

IotI& ..It o/liIt, ~

KaI_
KaI"'....to< .."'"It ...ohifI
Itt, ........

tomplomoftl tho MO

comploonwnt. C(AC) ""
C(AC1
complement __ Ctl) '"
Cit)

itIcIu_ OR AC _
C(ACS) V C(AC)

OPERATION

MN(MOHK:

...,
••.'

oel«! fU<I~ , to, .I"".n"meric. clO.... _
oe"" tUde, 10< bon . .... . Clo' re_. n.,
_ d Ihe .. _ , bull.. Into AC . ..... _

n",

.. ft . .

P.P*' hp* ""ncll

' .'P iI "",..11 Ills I,. I
_

"" ..... bu_ and ...... ""neh. cIN, "" ..... ft ..

..... "..,..." 110.
~n:I

Tnpul 'rom T"'pt,n te<

. ... p iI ~'" Ills is • I

.- _

~'"

bulle< into , ... AC.

cleo ' ""_'" "",

"' NE"'ONIC

OP£RATION

.,
"'

. k,p if I~o",inlo, bll i••
_
le"p,inle, bull., . nd ..,Ie<:t, ,10" 1.'epnnl.,"011
,ho le""'in'" ft'lI

mmw,

DE Cl&po 551
11.0<1_ Tronslor, 0 . . """. !rom mmiob
10 l lIe AC
W,rto. T'.n., .... 0"" word 1<Om tho AC
10 mmiob
Soloct. Connect, '~ o unrt de,illn.ted
to Illo D£Ctopo control

,Ie.,

...

,,'"..

''''P

,'".
<u,
,. ,
~

Tape ContrOl 57A
0"' 0 ~ ' '''' ' 0"" con''''' ,udy (TeR) levej
i. I

di ...... Ill. TCR ftOI lrom 'ho "'''IIfOm In·
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. nd cleo, «><nm.nd

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diuble tho TCII ft0ll ' rom the o~,om in""up'. '",n oft , ... WCO 1I0il ond EOR
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.nd , he den. ily I,om ,ho AC
s kip i' lll. tope ',on, port is , • • dy (TTR)
AC bit, 9-12 in Ill. tope con''''' «><n'
m.nd fOIIi ... , and . tort tope motion
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continuous mode (,he AC I,
c,"" ,ed)
''''0 II II,. weo ft0l " . I
ble weo ftoll
<Ie .. weo ft0ll
on. ble WCO ftO,
inili. li,. Wt:O nOli
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• .... tch mode lrom roO<lIo fOO<I comporo
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m_ .i..
m .....

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onoble ERf
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'ran. lo, AC bits 5-17 10 C\ ond
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" .nol., AC bit. 5-17 10 we
" . nsl., CA bits ~·1 7 10 AC bit. ~17

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Disp lay 340

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loOd Cont"". Sot, '~e DEClO.,.
to 'he " ' _ mode ond di,OCII<>n

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MNEMONIC

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Iood di'o"y O<Id ...... , tort dls ploy
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Ca rd Reader 421
sl<I p II ..... de' ,h. ,.."., no; i • • I

.. IK' c.. d "'_, fo< """onumeric
..loci ca r<! ,. .<10, I<>< bino'Y
fOO<I cord column bulle, Into AC

Card Punch 40
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cord ""n,h
load row buff ... c'"'" "".ch fto;
c.... , ""nc~ bll

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INPUT-OUTPUT OPTIONS
BLOCK TRANSfER DRUM $YST(M TYPE 24 Drum

,."nsle.s operate through the com pule" s data ,nterrupt i;sc,hty permitl'"1 ,nterlaced p'oe, am a nd
drum transfer operat ion . SIor811e capacIties 01 32.768
W<;I. d $, 65,53 6 W<lfds . o. 131 ,072 words a,e Mailable

PRECISION CRT DISPLAY TYPE 300 PJoU data PO'"'

by po,nt on iii 16·;nch cathode ray tube on a rute.

9* ",ctles square havln, 1024 poonts on a Side
5epI.,tely vanable 10·b,\ X and Y coord",ates. In
eludes program ,ntenSlty co.",oI. PIoIhng rate " 35
mocrolf!COflds per po,"'

PRECISION INCREMENTAL CRT DISptAY TYPE 14'
PIon points, hnes. ve<;I(I'$, and characters on "

rute. ,deot,cal to Ihe 300. PIoU,n, .ate IS I'I> micro
nconds per po ,n t on vector. increment . and cha racter
modeS. Random poInt ploll'"11 's 35 microseconds
HIGH SPErO lIGHT P(N TYPE 310 Uses f,~r OPHC

h,hl p!pe and photomUltiplier 51$tem lor last detec ·
tlOn and m(xillieatlon 01 Inlormahon dIsplayed on the
precISIOn CRT dIsplay
OSCILLOSCOPf DISPlAY TYP[ 34 ControlS the plot
tmg 01 data point by poInt on an )l.y plottIng scope
SUCh as the Tek t ronl~ Model RM 503 Raster .i,e 1$
1024 • 1024 point •.
INCR(MENTAL PLOTTER AND CONTROL TYPf 350
Perfo,ms hIgh resolutIon plottIng on pape' 12 or 3 1
Inches WIde at rates of 12,000 or IS,OOO poInt. PII'I'
mInute PlottIng It'c'e""",t$ are 0.005 and 0 01 Inch

CARD RfADfR AI>IO CONTROl. TYPE <l21A. B Pro
vodes on-line readmg of standatd punched <::a,ds ~t
200 or 800 c.ards ~ mInute In afph/mume,.,c Or bInary

CARD PUNCH CONTROL TYPf 40 Control. ]00 Or
300 card·pet.m lnute tSM 523 Summary Punch. Bul
fe' holds one SO -bit row.
AUTOMATIC LlNf PRINTfR AND CONTROL TYPf
647 p" nts 300, 600. 01' 1000 Imes pe' minute, 120
columns per Ime, 64 characters pe' column. Includes
Slnlle line 120 character bull.,.
OATA COMMUNICATION 5YSTfM TYPf 630 Pfovodes a reai·lime mte rlace lor up 10 64 remote type·
w"'er $1allOtl. lor on·"ne inputs and outputs. Used
In message SWllchm" mta cOllecllnS, and dala proc ·
essing in multi·user appllcailons .
AUTOMATIC MAGNfTlC TAPf CONTROL TYPf 57A
Controls up to eight tape transpotts automatically
PfOVldeS in fOl'mation tran sfer through compute,' s
data interrupt facility. permll""g interlaced program
and tape opera tIon. Controls readlnll or wrlhng of
tape at VarIOUS rales compatIble WIth IBM. BCD, or
bInary parity modes.
MAGNfTlC TAPf TRAN5PORT TYPE 570 Tape mo·
hon is contrOlled by pneumatIc c.apstans and brakes,
• IIminat lng conve nliona l pinch rollers, clamps, and

mechanlCollt arms. Tape speed IS eIther 75 or 112.5
Inches per second . Track tlenSlty, program·selectable ,
IS 200. 556, and 800 bIt s per Inch. Tape WIdth is
one·half Inch. WIth SI . data tracks and one P;ltIlY
track . FOtmat IS IBM compatIble. Cual heads permIt
re3d ,chec kl n~ whIle wrltln~.
MAGNETIC TAPE TRANSPORI TYPE 50 Reads and
wtlles IBM -compat Ible magnetIc tape at Iranslcr
rates of 15,000 01' 41 .700 cps, and 200 Or 556 cpi.
OECTAPE OUAl TRAI>ISPORT TYPE 555 A fl'ed
address magnetIC tape facIlIty lOt hIgh speed load
In" re.dout. and on line program debuggIng. Read ,
w"te, and search S~ IS 80 IncheS a second Den
slty IS 375 bits ~n Inch The two logIC a lly Independent
transpotts !>ave a storage upaclty of 3 mIllIon bIts
NoCh_ Feature. phaH recordln8, rather than ampl,tude record,ng: redundant , IIOnadiaeent data trac kS;
and a prerecorde-d tlmln~ and mark trac ~
DECTAPE CONTROL TYPf 550 Control' up to tour
Type 555 Dual D[CTAPE Transports. Searches In
eIther dltectlon for specIfIed bloc k numbe<s. then
reads or wntes data UflIIS IS small as a .,n8Ie word
may be addres'ied
18 BIT OUTPUT RnAY BUFrER 'YPE 140 18 spdt
relays actwted by computer command lor use 10
dlfectly control or sl~n.l1 e.ternal equIpment
DATA INTERfWPT MULTIPLEXER TYPE 173 PrOVIdes
multIple. control lor sImu ltaneou s operatIon of tllre<!
high ·speed devIces such .. the Type 57A Tape
ContrOl or the Type 24 Crum Ma .. mum combined
transfer rate IS 570 .000 18 b,t words pet" second
AI>IAlOGTOOlGITAL CONV[RT[R TYPE 118 Trans
forms an anal .... voltage to • bInary number, H·
lectable lrom 6 to 11 bIts ConverSIon lIme va"es.
depending on the number 01 bIts and the actUrKY
reqUlfed. Twenty-one combmatlO<ls 01 sWltd'" ng po,nt
accuraty and number 01 bIts Can be selecte-d on the
Iront panel.
MULTIPLEX£D ANALOG TO DIGITAl CONVERTER
TYPE 138 /39 The Type 139 MUlt Iplexer ContrOl per
mIlS up to 64 channels of analog ,nforma t...,., 10 be
applied SIngly to the Input 01 tile Type 13S Anatog
to·o.gllll Converter Channels c.n be selected In
sequence or by IndIVIdual addresses

HIGH SPUD ANALOG TO DIGITAl CONVERTfR
TYPE 142 Translorms an 1n.l108 voltage to a Sln,le.
10·blt binary number in 6 mICroseconds. ConversIOn
accuracy IS ~ 0 .15% ., lh lent S l~nl"canl bit.
ANALOG DIGITAL ANALOG CONVERTER SYSTEM
TYPE ADA I Pe rlorms lISt. r",,1 lIme data conversion
between digl tat and analOS computers. MaXImum
sample rate for D A con verslOl'1 IS 200 kc : fOt A 0
and Interlaced converS>Of1S. 100 kc_ Dlg l~t word
length IS 10 bits. Actual ConverSIOn trmes Ire 5
mICroseconds lor II 0 and 2 microseconds lor D ,,-,
SemiautomatIC leaturn enable the ton~ner s)'5tem
to perform many of the lunctlons that a computer
normally per/orms lor othe, converter Interfaces .

The tNsic POP.7 eln be easIly e. plnded uSin, lhe
many slandard options I""it"ble. S'-n In the above
conli,uratlOll are OEClape transports and conlrol
unIt alona wIth " hl,h speed &raphic and ch"racler
dl.play Type 340 (2 . i,hl -hand cabInets) . Such I

system has a pphc.1tlOlls in lulomated elec\rocal Ind
mecllan.cal draftlnl . st. ess lnatl'll'. Ind analol
(\ala dIsplay. DECtape mas. s lora,e provides a me·
dium lor Io;td·and·,o FORTRAN.

•

EQUIPMENT
COR P O RATION

1'5i41

Pfl INHD IN U S,~ .

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