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XX-B5B87-29

1972

14 pages

Original

0.7MB

Document:	MAINDEC-11-D6BA-D-AA11 DAC CALIBRATION 1970
Order Number:	XX-B5B87-29
Revision:	0
Pages:	14
Original Filename:	http://bitsavers.org/pdf/dec/pdp11/xxdp/diag_listings/AA11/MAINDEC-11-D6BA-D-AA11_DAC_CALIBRATION_1970.pdf

OCR Text

to EN T I F' I CAT l 0 N
l'ROOUCT CODEI

MHNDEC-11-D68A--D

PRODUCT NAME I

A.AU DAC CAL l BRAT 1 ON

OATE

NOVEMBER 2t, 1970

C~EAlEOt

MAINTAINERS

DIAGNOSTIC GR.CUP

AUTHOR·t

JO._.N RODENMISER

PDP-11 LAB
ELEC. ENG. DEPT.

NOT

REMOVE

•

ABSTRACT
THIS PROGRAM ASSISTS IN THE TESTING ANO CALIBRATION OF THE
AA11 DIGITAL TO ANALCG CONVERTER. PROVISIONS ARE INCLUDED
FOR A POP-11 SVSTEM wITH uP TO 4 AA-11 DAC'S. THE PROGRAM
IS ~IVIOED INTO FOUR SECTIC~S: DAC TEST, RA~P, SQUARE
WAVE, AND CALIBRATE,

REQUIREMENlS

2,1

EQUIPKENT

POF-U/2.·0
AA11 DIGITAL TC ANALOG CONVERTER SUBSYSTEM WITH UP
CONVERTER ~ODULES,

2,2

ro· 4

STORAGE
THE PROG.RAM OCCUPIES MEMOR'V FROM 0 TO 153,0,

LOAD ING PROCED.U.RE

:S,1

METMOO
PROCEO.UR:E FOR N.ORMAL BlNARV TAPES SHOULD BE FOLLOWED,

11
21
3,
4,

ABS:OJ.,.:UTE L.OAOER MUST B:E IN MEMORY,

PLACE BlN·A·:Ry TAP'E IN READER
LOAD Ao.o·R:ESS •75Hl c• .DETERMINED av ADDRESS
PRESS "SHAT" CPROGRAM WI.LL LOAD>,

or LOADER>.

STA:RT ING PROCEOURE
CONTROL S'W ITCH SETTING'S

4,1,1

ALL. SECTIONS
S~ITCH

REG1STIR BilS 14, 13, 12 SELECTS OAC TO 8£ T[SfEO,

ADDRESS ASSIGNMENT

14 13 12
121

0
0
1

0
1
0

OAC0
DAC1
OAC2
DAC3

0
1
0
0

176760
176762
176764
176766

CREF'ERENCE 8.3>

RAMP, SQUARE WAVE, ANO CALIBRATE

SWITCH REGISTER BIT 11
11=0
11 =1

co~TROLS

f>OSI'T'IVE
~EG.4T I VE

OAC POLARITY

4,1,3

RAMP TEST
SW ITCH REGISTER BITS 6 THRU

CONTOL RAMP SLOPE

5 4 3

2 1 0

0 0 0
0 0 1
0 1 0
0 1 1

= MINIMUM RAMP TIME

0 0 0
0 0
0 0 0
0 0 0

1 1 1

= MAXI MU~ RAMP TIME

""
121

•.• 1. 4

SQUARE WAVE

SWITCH REGISTER BITS 6 lHRU 0 CONTROL SQUARE WAVE F'REQUENCY
6

5 4 3

0 0

2 1 0

0
0
0
0

" "'

m ~ 0

•,1;5

0 0 0

0 ii 0

0 2

= MAXIMUM F"REQUENCV

0 1
1 18
1 1

1 1 1 • 1 1 1 a MINIMUM FREQUENCY

CALIB~Art·

SWITCH REGISTER SITS 11 TMRU 0 CONTROL 11 BIT DAC VALUE,
1e 9

a ' 6

s 4 J

2 1 0

0 0 0

0 0 0 = MINIMUM VALUE <0 VOLTS>

1 1 1

1 1 1 = MAXIMUM VALUE

4,2

STARTING ADDRESS

4,2,1

20121 OAC TEST

4,2,2

204 RAMP

4,2,3

211 SQUARE WAVE

4..-2, 4

214 CALIBRATE

OR ~ ruLL SCALE)

PROGRAM ANO/OR OPERATOR ACTION
LOAD PRO~RAM INTO MEMORY
SELECT TEST,
LOAD STARTING ADDRESS,
SET APPROPRIATE CONTROL SWITCHES,
PRESS "START"

OPERATING PROCEDURE

5,1

DAC TEST
LOAD ·A.ODRESS 2H ...

SEL.ECT ONE DAC WITH SWITCHES 14, 13, 12 <REFERENCE 4.1,1),
F>Rtss 'ST ART,,.

PROGRAM WILL aEGIN TESTING THE SELECTEO DAC,
ONLY ONE DAC ~ILL BE TESTED AT A TlME,. HOWEVER, OAC StLECTIDN
CAN B~ CMANGED AT:ANY TIME WHILE TME PROGRAM IS RUNNING,
5 ,.2

RAMP TEST

LOAD ADDRESS 204,
SEL;ECT 'ONE<DA.C ·IJUTH SWITCHEs· 14, 13, 12 .(REHRENeE. 4~1.Ui
SEl.ECT PO.LAR ITV WITH Sltll TCH 11 ( REF'ERENCE 4, 1.• 2),
SEL.tCT. RAMP ·SLOPE WI TH SW lTCf.IES 6 HIRU 0 ( REF"ERENCE 4 .1. 3).
PRESS SURT,,,
PROGRA,M WlLL E)(ECUTE ·RAMP, '
ONl,.Y ONE DAC ANO POLARITY MAV BE SELECTED AT A TIME, TO
SE~ECT ANOTHER OAC OR CHANGE POLARITY RESTARl TEST AT l10,
SWITCHES CONTROL~ING RAMP SLOPE MAV BE CHANGED WMILE PROGRAM
IS .:RUNNING.

5,3

SQUARE WlVE
LOAD AQORESS 21i,
SEl..ECT' ONE. DAC.. WITH SWITC!HES 14, 13, 12 <REF'ERENCE 4,1,1),
SEL~CT POLARITY WITM SWJTCH 11 (RErERENCE 4,1,2)
SEL;EeT SQUARE ·wAVE FREQUENCY WITH SWifCHE'.S '6 THRU 0 <REFERENCE 4,1,4)
PR£SS START,
.
~RnG~A~'WILL EXECUTE SQUARt WAVE,
.
ONLY ONE .DAC AND MAY BE SELECTED AT A TIME, TO SELECT ANOTHER
OAC RESTART TEST: SWlTCMES CONlROLLiNG SQ~ARE WAVE POLARITY OR
F"REQUENCY MAV BE CHANGED WHILE PROGRAM IS RUNNING,

5,•

CALIBRATE TEST
lOAO ADDRESS 214,
TO FOUR DACS WITH SWITC11ES 14, 13, 12 -(REF'ERENCE 4,1.1),

SEl..ECT UP

SEL.ECT POl..ARlTV WITH SWITCH 11- CREF"ERENCE 4,1.2),
SE~ECT DA~ VALUE WITH SWITCHES 10 THqU 0 <REF'ERENCE 4.1.5).

PRESS START,
PR-OGRAM WILL LOAD OACS WITM SELECTED VALUES,
SWITCHES SELECT~NG OACS, POLARITY OR VALUES CAN BE CHANGED
WijlLE PROGRAM IS RUNNING,

6_,

ERRORS

6,1

ERROR REPORTING

IF AN ERROR OCCUAS DURING DAC TEST TME PROGRAM W~LL HALT,
REGlSTE:R :9J ,WILL CONTAIN EXPECTED VALUE OF' DAC, TO RESUME
TEST! NG PRESS "CONT I NUE" ~
IF' IT TS OES IRED TO LOOP ON
TME TEST THAT FAILS REPLACE THE HALT INSTRUCTION WITM A
240-(NOP)•

NO ERROR INDICATIONS ARE GIVEN OURlNG OTMER TESTS,

RESTRlCTl-ONS
NONE

MISCELLANEOUS

8,1

EX£CUTinN TIME
N/A

8,2

PROGRAMMING

TECHNIQUE

THIS PROGRAM MAK!S EXTENSlVE USE or GENERAL REGISTERS roR THE
PURPOSE OF' GA I NI NG MAX t MUM OPERA TI NG SPEED•

0
8,3

DAC SELECTION
THE PROGRAM CAN TEST UP T~ ~OUR OAC 1 S AT ONE TIME. IN
IT'S STANDARD FORM IT WILL TEST DAC0, DAC1, DAC2 AND
DAC3. MEMORY ADDRESSES 1~0, 1e2, 104 AND 106 CONTAIN
THE PDINTERS FOR THESE DACS, IF IT !S DESIRED TO TEST
ANV OF TME OTHER 16 OACS, THE OPERATOR MUST CHANGE THE
CONTENTS OF THE POINTER ADDRESSES TO SELECT THE DESIRED
OAC.

EXAMPLE I

OACS 0, 81

OAC
riJ

1
2
3

4
5

176760
176520
176542
176566

13 ANO 19 COULD NOW BE SELECTED,

ADDRESS
1}6760

176762
,,,7676•4
176766
1765021

1 '76'502·
17()5((1,

i16506

176520

~76522

100/
Ul2/
104/
106/

17;652~·

1,76526

12 ; .,
13
14
15

1(6540

16
11
18
19

176560
176562
176564
176566

t'7 6542
176544
176546

PROGRAM DESCRIPTION

9,1

DAC TEST
THIS TEST MAKES CERTAIN THAT ALL BITS OF THE DAC MAY BE SET,
CLEARED AND READ BACK. r1q5y THE DAC IS CLEARED AND CMECKED TO
BE CLEAR, THEN SET TC ALL CNES ANO CMECKED TO BE SET TO ALL ONES,
NEXT THE DAC IS SET WITH AN INCREMENTING PATTERN AND CHECKED.
ALSO CHECKED ARE THE CONDITIONS WITH BIT 11 SET TO MAKE SURE THAT
BIT 11 IS REFLECTED IN BITS 15 T~RU 12.

9,2

RA~P

TEST

THE DAC SELECTED.BY SWITCHES 14, 13, 12 IS CLEARED <SET TO ~ERO VOLTS>
ANO THEN INCREMENTED CCR DECREMENTED) AT A RATE THAT MAY BE
CONT~OLL£0 BY SWITCMES 6 TMRU 0 U~TIL TME ~AXIMUM VALUE (+ DA ~ FULL
StALE> IS REAC~EO.
9,3

SQUARE WAVE
TME OAC SELECTED BY SWITCHES 14, 13, 12 IS SET TO ~ERO AND FULL SCALE
<I~ POLARITY NEGATIVE> AT A RATE THAT MAY BE CONTROLLED BY SWITCM£S
6 lHRU e,

9,f

CALIBRATION
THE VALUE CONTAINED IN SWITCMES 11 TMRU0 IS LOADED INTO TME OAC

SELECTED BY- SWITCHES 14, 13, 12, Tl-IE OPERATOR MUST DETERMINE WITH
A CVM OR 'SCOPE If' TME OAC OUTPUT IS ACCURATE,

PAL.XU

VH3

20 ... NOV-70

7:58

PAGE 1

J AA11 DAC
;COPVRIG~T

CALIBRATION
1970, DIGITAL EQUIPMENT CORP. I

MAYNARD, MASS,

;J014N ROOENHISER
000000

' =0

,REPT

000020

,+2

HALT
,ENOR
0210000
000002
000004
000006

000002

,+2

12100000
IU0006
000000

~ALT

000010

000012

,+2

000012
H00t4
00121016
0H0UJ
00H22
000024
000026

UH00

HAI.. T

0021022

,+2

0Jll00.00

HALT

000Qf26
00021021

MALT

H0032

B.00000
1100036
"00000

0H046

HHH

0000!52
0HIZ!'4
0H056
00e·060
HJ00~2

0·002164'

001Zl066

HAL.T
~·2

~0m00er

MALT

MAI.. T

00HS2

,+2
MAL.T

, •2

·0021000
. 00H.56

,•2
MALT

000000
12100062
,000HJ0
0021066

MALT
MALT
,+2

0'Hl010

000000

000074

000076

. 12100076

lllil0000

00011210

176760
176762
176764
176766
177570

0~0106

,+2
1-!AL T
,+2

0H046
ra001u10

0000'12

000104

,+2

00004~2

tllllJH00
H0072

000102

WALT

000000

00121030

00H34

,+2

HH16

000032
0HIQJ36
000UllJ
000042
llJH044

,+2

1-!AL T

,+2
I

MALT
,+2

HAL.T
;TME FOLL.OWING 4 AOORESSES MAY BE MOOIFIED TO POINT TO on~ER DACS
176760
J CON TA I NS ADDRESS OP DAC 0
OAC0:
176762
JCONTAINS ADDRESS OF' DAC 1
DAC1:
176764
JCON'fAINS ADDRESS or DAC 2
DAC21
;cnNTAINS ADDRESS or DAC 3
176766
DAC31
SR=177570

NOP=240

000240.
000776
000200
000204
000210
000214

000200
0210167
000167
000167
0""21167

+2·

STACK=776

,:200
000574
Pl01006
001U6
~00704

JMP
JMP
JMP
JMP

TEST

DACTST
RAMP
SQUARE

JR AMF TEST

CAL. IB ·

JCALIBRATE

JDAC

JSOUARE WAVE TEST

PAL.><11

VH3

20•NOV-70

7&58

PAGE 2
'=1000

JTEST DAC BITS 12~0 TO SET
JSW 14, 13• 12 SELECT DACS
DACTST: MOV

001000

eJ12706

0QJUJ04

"1214767

001010
001U2
001U4
00UJ16
00UJ20

005010
e.!11'001

00Ul22
00U26
00UHJ

U27UJ
011H1
fJ22 ?01

001flJ3.4

'llJ01402

BEQ

0,010S6
001U0

HH00
001lJ770

MAI.. T

on:

177777

H1H6

HIHHI

HUU
H1H2
H12166

100770
1227"1
111367

H.U70

912701
112710
105210
Hl,201
112eJ1UI

011174
0011H
0HUJ2
0HUJ4

091106

001402

0H1UJ
011112
001114
001120
001122

1"2121HI
1011766
llJ22710
001367
100726

on I

( 0)
(0) ,"1

MOV

CMP

177717

JGET DAC SELECTED

# ... 11(1?J)

ceh "1

# ... ,.., %1

OT2
JERROR OAC NOT

CL.R

11
(0)
"1

= ALL 1'S

;TEST OAC WILL ACCEPT A COUNT PATTERN <0 TO ~777)
OT21

011042 H5H1·
t/JUIU tUJ5111
2121118'6 905201
01tn.1 <e·ee.210

12uur
H1402

c:LR
MOV

CLEAR

BEQ
OU
JERROR OAC NOT CLEAR£0
MAl.T
BR
CT0
JTEST DAC CAN BE SET TO ALL 1'S

001402
000000
000773

0010'2
0111'4

#STACK d,6

X71DACSEL
J TEST OAC CAN BE CLEARED
JSR

A~D

CLR
OT2A I

INC

INC
C:MP

SEQ
MALT
BR
H3777
173777
H.13777

OT2B 1

. TTEST
OT31

OTJA s

CMP
BNE

DT38t

OT2B

OT2
#3177,"1
OT2A

. IE RR 0 R 0 AC N0 T = "1

nuT DAC WlLL ACCtPT A COUNT PATTERN C4100e7777l
MOV

#173777, u
#3171,

INC

( l?J )

MOV

INC
eMP
SEQ
MAL.T

177777

UiJ)
X1t lR')

(0,

"1• (0)
OT3e·

OT3

CMP

#•1d0)
OT3A

BNE
BR

OACTST

JEAROR OAC NOT = Xl

aREPEAT TEST LOOP

7:58

001124

H1132
0011:54
001142
001150
001152
001u0
01211166,
H11'1QJ

001116
001204
001206
U12i4

032767
00UH'J3
016777
032767
001403
0167?7
213'2767

~70000

176436

176430
01001ZJ0

176136
176420

176412

176722

02.00~0

176402

176374
040000

176706
176364

176356

176672

001216 ; 0127~6 000776
00122'2: 004767 000204
0ru226, ~32?6:7:.:· 004000
21211234 0~101,;~/;;;'', ,

0112:16 ·u!Hu'ef

itBU•" ~ . U2'102 · 17'7570
H12i4~ 0.12703 . rll03777
H129Ql . 005210"
00125.2. 111201
HJU·M'. UJ!530.1
01125:6· . U0JJ6
00126eJ 020310
U1262 ,H1372
001264 fl'.05010
001266 000771
~

JCALIBRATION ROUTINE FOR UP TO 4 DACS
JSW 14, 131 12 SELECT DACS
JSW 11 SELECTS POLARITY
JSW 10-0 SELECTS DIGITAL VALUE
CALIB: BIT
#7~0001SR
JTEST SW 12, 13, 14 = 0 TC LOAD DAC 0
BNE
C1
MOV
SR,@DAC0
C11
BIT
#10000,SR
JTEST SW 12 TO LOAD DAC 1
BEQ
C2
MOV
SR,taOACl
C2C
BIT
#20000,SR
JTEST SW ·13 TO LOAO OAC 2

e0140>3
016777
032767
001747
016777
; 200743

001i10· 005010
001212 'f812702 . 1'77570
0012?6 012703 174000
001302 0'l53U
001304 11121l11
001306 ~053·01'
001310 1[ll0376

PAGE 3

CJ•

eEQ

MOV
BIT
BEQ
MOV

SR,&aOAC2
#40000,SR
CAl..IB
SR1taOAC3

C:AL.IB

JTEST SW 14 TO LOAD

JRAMP TEST
JSW 14, 13, 12 SELECTS.DACS.
J SW 11 SELECTS POL.AR I TY
JSW 7-0 CONTROLS RAMP' SLOPE
RAMPI
MOV
#SlACK1X6
176334

JSR

. %1, OACSEL

. BIT

#4H0,·SR

BNE

J POSIT I VE RAMP
J%0 CONTAINS OAC POINTER
RPS
CLR
(0)

RPtl
RP21

MO-V

·#SR,%2

MOV
INC

#3777,X3
(0)

MOVB

'<2),"1

OECB

BPL

CMP

, ... 2
"31 C0>

BNE
RP1
CLR
C0)
BR
RP2
JNEGHlVE RAMP
J%0 CO~TAINS OAC POINT£R
RN;
CLR
C0)
MOV
#SR,"2
MOV
·#114000,X3
RN11
DEC . .
C0)
RN2·:

MOVB

( 2), "1

OECB

JCLEAR OAC
;%2 JS SWITCM REGISTER POINTER
J%3 tS OAC VALUE COMPARITOR
i•1 TO OAC VALUE
I GE T . 0 EL.A Y f"R 0 M SWI i CHE S

iC!:LA'Y COUNT

J rs OAC•3777?

JNO
IYES, CLEAR DAC

JCl..EAR OAC
JX2 IS SWITC~ REGlSTER POINTER

1%3 !S DAC V4LU£ COMPARITQR
J ... 1 TO OAC VALUE
JGET OELAY rROM SWIT~HES

BPL

, -2

JDELAY COUNT

e'01312

02el31"J

.CMP

" 3 ' ( 0)

JIS DAC=174000

~01314

001372
005010
000771

BNE

R.N1

JNO

CLR

( 0)

JYES, CLEAR DAC

RN2

001316
001320

OAC 3

PA.~XU

001322
001326
001332

001340
01U:S•2
001346
0U350
0ftl1354

0"13·56

00uu·

2101364
H1371
H1312
H13?4

VH3

012?06
004767
032767
Hl1016
QJ127U
000400
116701
UJ5301
5;00376
012710
116701
105301
100376
IH756

20-NOV-70

000776

000000

176214
003777
176220

PAGE 4

;SQUARE WAVE TEST
:SW 14, 1. 3, 12 SELECTS DACS
;SW 11 SELECTS POLARITY
;SW 7-0 CONTROLS FREQUENCY
#STACK, "6
SQUARE I MOV
JSR
"710ACSEL

000U0
0040021

7158

176230

SQI

BIT

OECB
u
... 2
BPL
#3"177,(0)
MOV
MOVB
SR1%i
OECB
%1
.... 2
BPL
BR
SQ
JNEGATIVE SQUARE WAVE
JX0 CONTAINS OAC POINTER
#f(J,.(Ql)
MOV
SNI
,+2
BR
MOVB
SR1%1
%1
OECB
BPL
• "'2

112710

000000

176160

HUHJ
0U412

1110400
S,1:6701
s.15301
1Hl376

091414

IB127UJ

H40H

01U4H
H.11424

s,167211

176144

UJ53el1

OECB

011426

S,H3?6
llH140

8PL

00S.J"16
2101412

001414

001430

#40210, SR

BNE
SN
JPOSITIVE SQUARE WAVE
JX0 CONTAINS DAC POINTER
MOV
n,cei>
SPI
,+2
BR
SR, "1
MOVB

MOV

MOVB
BR

-#4fa0'1), (0)
SR, "1

VOLTS
JBALANCE TIME: BETWEEN

JS[T OAC AT 0

J0£LAV

JSET OAC AT •10 VOLTS
I OE LAV

JSET DAC AT eJ VOLTS

JBALANC£ TIME BETWEEN '"' !NO GNO

JOEi.AV
rSET OAC AT

"1
' ... 2

+ AND GND

J0£LU

.-u VOLTS

PAL.XU

V003

20-NOV-70

7:58

PAGE 5

JOAC SELECT SUBROUTINE
JSWITC~ REGISTER BITS 14, 13, 12 SELECT DACS
JREG!STER 0 WILL CCNTAIN POINTER FOR DAC SELECTED
J

001432
0IU440

5,32767
UUJ0J

001442

QJ167f2!0

00144-6
0014!Hl
001456

~00207

001460
001464
001466
001414
0eJ1416

001512
0U5tB4

0fltU_UI

0001612J

176131

000020

001403
216700

176416 .

000207
S,32767

000040

1'?6113

DS1a

1760?5 . 0521

SllJ1403

tU6700 . 176402
000207
0167·00 176376
0.0el..2.0 7
H_IUJ01

RTS

BNE

176432

132767

MOV

tt160,SR+1
051
DAC0,"0 IYES

DACSEL: BITS

0531

BITS

#20,SR+1
DS2

MOV
RTS

!:lAC1, %0

SEQ

#421,SR+l
"'OS3

JI S rJAC 0 SELECTED?

INC
JI s OAC 1 SELECTED
JNO

JYES
DA c2 s Eu.: c·r EO

BITB
BEQ
MOV
RTS

%'1

MOV

OAC3,%0 JMUST BE OAC3 - NO OTHERS SELECTEO

IHS
,END

OAC2,U JYES
%7

I IS

INC

- PAL.XU

CAL.IS

001160
001176
001124

OAC:0

000100

DA Cl
OAC2

000104

7158

PAGE 5•1

000102

DAC3
OACSEL
OACTST
OS1
OS2
053

000106

U1432

HUH
ni4s0
H1466
Us,504

001.12110
UU22
!0U42
HU46
UU62
PJ0U7rtJ
001100
Hl1114
H0240
U1216

OT2
OTU
OT28
OT~

QT3A

one
NOP
RAMP
RN
RN1

001270

0U302
001304
H1236

RN2
RP

RP1

HU511J

Ul.252
HU76

RP2
SN

SP
SQ

SQUAAE
SR
SUCK

U1342
101332
IH1322
177570
000776

OETECTEOI 0

RUt;-TIMEt
~K

2"-NOV•70

U1142

C1
C2
C3

ERRORS

vn·s

1 SECONDS

CORE USED

-- - --·-·----·-- --'------------·-··------------~-------------~------------~-------