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MAINDEC-15-D1A0-D

October 1969

15 pages

Original

0.5MB

Document:	PDP-15 Basic Memory Checkerboard
Order Number:	MAINDEC-15-D1A0-D
Revision:
Pages:	15
Original Filename:	http://bitsavers.org/pdf/dec/pdp15/diag/MAINDEC-15-D1A0-D_PDP-15_Basic_Memory_Checkerboard_Oct69.pdf

OCR Text

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nEl1tlRy

IDENTIFICATION
Product Code:

MAINDEC 15-D1 A¢-O (0)

Product Name:

POP-158a~ic Memory Checkerboard
(low and High Versions)

Date Created:

October 22, 1969

Maintainer:

Diagnostics Group

Author:

J. W. Richardson

ABSTRACT
The Pj)P-15 Basic Memory Checkerboard programs test 3D core memories
for failure on half-selected lines under worst case noise conditions.
Their use is intende~d for 4K systems. Either program will loop until
stopped by the operator, or an error is detected.

REQUIREMENTS
Equipment
A standard PD P-1 5.

There are two versions of this MAINDEC. The Low End program occupies
memory locations 200 to 506, and tes\·s memory from 1000 to 7777 octal.
The High End program occupies locations 7400 to 7674, and tests memory
from 0000 to 7377 octa I .
3.

LOADING PROCEDURE
The loading procedure is identical for either program.
a.

Place the tape in the reader.

Place the BANK MODE switch on a 1.

Set the ADDRESS switches to 17700.

Press I/O RESET, and then READ-IN.

STARTING PROCEDURE
a.

200 is the starting address for the Low End program.

7400 is the starting address for the High End program.

The AC switches do not effect the normal operation of the
program. However, they may be used to suppress error halts.
See section 6.

-1-

PROGRAM DESCRIPTION
The program tests memory using four different patterns. Three of the
patterns are variations of a checkerboard type, plus the complement
of each, making a total of six. The fourth pattern is included to
test the effects of prolonged reading of a memory location that contains 000000 and all other intersecting addresses contain 777777. As
an example, the program may write 777777 in every Y axis address
from 0000 through 7300. The Y axis is addressed using bits 6 - 11.
The program then deposits 000000 in address 0000 and then reads
(LAC*) address 0000 1024 times. Each Y address intersecting X line
00 is then read and checked to make sure that each contains 777777.
If a "weak" core is present, it may switch to the 0 state using this
test method.
Shown below are the three checkerboard patterns and their complements
as they would appear in a portion of one bit plane. Each pattern
complements every 40 octal addresses. The X axis is addressed by
MA bits 12 - 17, and the Y axis by bits 6 - 11 .
Pattern 1:

463144

Yaxis

X axis

10011001
10011001

X axis

011 0011 0
011 0011 0

01100110

10011001

Pattern 2:

631460

Yaxis

Y axis

X axis

11001100
11001100

X axis

00110011
00110011

00110011

11 0011 00

Pattern 3:

525250

Y axis

Yaxis

X axis

10101010
10101 01 0

X axis

0101 01 01
01 01 0101

01 01 01 01

10101 01 0

The control words used to generate the patterns are:
Pattern 1:
Pattern 2:
Pattern 3:
6.

463144 and 314633
631460 and 146317
525250 and 252527

ERROR HALTS
Listed below are the six possible halts which may occur. Halts E1 through
E4 apply to the memory checkerboard tests (patterns 1, 2 and 3), and E5
and E6 are used for the fourth pattern (tagged BURST on the program
listing) .
Two addresses are given for each halt; the first is for the Low End test
and the second for the High End test.

C (MO)

Description

362
7557

A memory location does not contain
777777 or 000000. The AC displays
the address of the location in error.
Press CONT for next halt.

364
7561

The AC displays the contents of the
location in error. Record the va lue
and press CONT for the next halt.

366
7563

The AC displays the data the
location shou Id have contained.
CONT again.

370
7565

The AC displays the control word used
to generate the current checkerboard
pattern. The value will equal 463144,
631460 or 525250 or their complements 314633, 146317 or 252527. Press CONT
resume testing with the next sequential
memory location.

450
7643

An error was detected during pattern 4.
A m6mory location does not equal 777777.
The AC displays the failing address.
Bits 12 - 17 indicate the X axis address
whicr contains 000000. Bits 6 - 11
indicate the Y axis address which shou Id
have contained 777777. Press CONT
for the next ha It.

Press

C (MO)
452
7645

Description
E6

The AC displays the data read from
the failing address. Press CONT
to test the next sequential Y axis
address.

Error Suppression
Further error halts for any bit position in the checkerboard tests
(halts E1 - E4) may be suppressed by placing the corresponding AC
switch on a 1 before pressing CO NT after the last error halt (E4).
An error halt will occur for any failing bit position whose corresponding AC switch is on a o. Error halts for all bit positions may
be restored by restarting from 200 (Low) or 7400 (High).
Anyone of the six checkerboard patterns (3 plus complements) may be
used exclusively by placing the correct control word in 3 locations
(see error halt E4 above). For the Low End test these locations are
460,461 and 462. For the High End test the locations are 7671,7672
and 7673. Either set of 3 locations normally contain 463144, 631460
and 525250, respectively.
Error suppression for pattern 4 is not provided.
address do the following:

To loop on any failing

Manually DEPOSIT the failing address in the location tagged
PATR on the listing.

Place a NOP 2 locations before the tag BUST (BUST -2).

Set the ADDRESS switches to the address of tag BRSTA.
I/O RESET, and then START.

Press

The location tagged PATR contains the failing address.
Location BUST -2 normally contains an ISZ PATWD.
7.

EXECUTION TIME
Either program requires\ approximately 20 seconds to run all 7 patterns.

LISTING

;)A:;E

1
.TITLE L0CK 15
/
/~DP-15

bASIC 4K MEMORY CrltC~EoaOARD.
(qESIOES IN LOw - TESTS HIGH)

/S.A,=2~~,

/COPVRIGHT 1969 DIGITAL EQUIPMENT CORP"
/MA H"ARD, MASS,
/

/J,
/

RICHARDSON
.ABS

002100

• LOC

2~H~

0eJ2~0

012J21211
00202
012J2103
0021214
002°5

777777
040453
777775
040454
21210456
°4 0 457

BEGIN

LAW
DAC
lAW
DAC
LAC
DAC

_1
BITSUP
-3
PATCNT
PATN
f\JXTPAT

lAC.
DAC
JMS

NXTPAT
CNTRL
TEST
NXTPAT
PATCNT
CKLP
BEGIN+2

IGET A CONTROL woRO
ISAVE
IWRITE PATTERN AND TEST
IINCREMENT POINTER
IDONE ALL Ir SKIP
100 NEXT PATTERN
ISTART OVER

WR!TE

/WRITE THE PATTERN

ICONTROL WORD COUNT
ICONTROL WORD POINTER

0021216
0021217

1210210
1210211
00212
00213
~0214

1210 215
00216
00217
0022;)
00221
00222
00223
00224
00225
~0226

0121227
00230
0121231
00232
00233
20234
0121235

220457
040465
1121121215
440457
440454
600206
600202
/
000121Q.1~
1~026"

CKLP

IS~

ISt
JMP
JMp
TEST

200471
0404710
10027tO

200470
744klJ10
~40470

740200
6121121221
600374
777774
260457
540465
62021'
C40465
61210216

COMP

JMS
LAC
DAC
JMS
LAC
RCl
DAC
S2A
JMP
JMP
LAW
XQR.
SAD
JMP.
DAC
JMP

BITCON
REAu

IUSED TO COMPLEMENT BITS
IREAO AND TEST

8ITCO~

ISETUP FOR NEXT 8IT
TEST+4
8URST

ITEST NEXT BIT POSITION

-4

"vXTPAT
CI\JTRL..

/CHECK FOR LAST PATTERN

TEST

lolo COMPLEt.1E"NT

CI\jT~L

TEST+l

/WRITE COMPLEMENT

ICURRENT PATTERN WORr
/SAVE

/
/GENERAT~

PATTERN

0121236
0121237

:'00000

GENPAT

~.,

LAC

C\JTR:...

l1eJ24;:

20J46;
J40472

DAC

SVt.lST~

LAC
DAC
LAW
OAC

0£1241

200501

121121242

e40473

~0243

771~00
.~40474

00244

( 1 r k) ~1

SV ADR
-7~r0

SVLT4

IADDRESS COUNTER

~A:;t:..

LOCK
00?4')
0i2124A

00247
;.112125'
0121251
0:21252
013253
~0254

00255
00256
1210257
i21026(J
1210261
1210262
00263
e"~264

00265
00266
00267

1210270
00271
00272
00273
1210274
00275
1210276
00277
00303
121031211
0030~

~Hi' 30

00304
00305
00306

00~07

00 121
00311
00312
00313
00314
00315
C0316
00317
~1032('

00321
~0322

0121323

1~
L A~.
.. 70
7777 1 '
'4J466
CT?<;
:' AC
? J i' 472
SVMSTR
LAC
}4.21475
JAC
PATR
777767;
i\C~T
a20
LAIoi
240467
CJAC~
CT16
2(1047;
PATR
LAC
744010
Rr,L
;]40475
DAC
PATR
751400
StL:CLA
740001
COMPL
CMA
C40455
DAC
PATWD
21210455
PATwO
LAC
620236
JMP.
GENPAT
I
0012112100
wRITE
0
100236
JMS
GENPAT
360473
DAC.
SVAOR
100307
CK)(Y
JMS
620263
JMP.
wRITE
I
IREAD Ai\JD TEST
I
00121000
READ
121
100236
JMS
GENPAT
;)40477
OAC
GOOD
200470
LAC
BITCON
260473
XOR.
SVADR
2160473
DAC.
SVADR
2210470
LAC
8ITCON
26121473
XOR.
SVADR
060473
DAC.
SVADR
22121473
LAC.
SVADR
SAD
54 121 477
GOOD
741000
SK;P
6210343
JMP
ERROR
RTN
100307
JMS
CKXY
620270
J"1P.
READ
I
IROUTINE TO CHECK FOR PATTERN INVERSION
I
(HI000j{)
CKXY
t
440474
SVLTH
1St
741~00
SKP
620307
JMP.
CKXY
440460
CTr4
1S t
741~00
SKP
J"'1P
60 0 32 4
Y64
200473
LAC
SVAOR
T A['
\:64
~4G50iC
'<H'lkj
:'43473
JAC
SVADR
440467
CT16
!St
600253
JMP
!,.JCNT+2
600247
JMP
'... CN~
I

ICOUNTS 4 'I 16 S~IFTS
ICURRENT C0 l1,JTRr'1L We'Re
ISAvE

ICOUNTS 16 S~IFTS
ICONTROL wORD

IWRITE 777777
I[)(IT TO WRITE OR READ

IGET A WORD
IWRITE
IC~ECK

FOR PATTERN

I~VERSI0N

IGET A WORD
ISAVE

ICOMPLEMENT A BIT
IWRITE WITH YNVERTED BIT
IRE-COMPLEMENT
IRESTORE
IREAD
ICOMPARE

IO.K,

IERROR PATH
ICHECK fOR PATTERN INVERSION
IEXIT

IDONE 4K IF SKIP

IEXIT TO WRITE OR READ
IDONE wITH Y AxIS IF SKIP
IDONE 64 Y LYNES
IINCREMENT

ADDRESS BV 1

ICHECK FOR 16 LorATIONS

INC'lT yET

IRESTORe OUNT

:JA:;t.

LOCK 15
~~0324

44:~473

l12132=,

77771//

210321,

/4(~466

~0327

:? 21 ,147.3

0121337

5 ZI ~~ 4 6 4
34.1501

~0331

00332
ll21333
0121334
21121335
1210336
0121337

(~40473

5eH'464
54~463

012134k.~

741000
603321
20\)472
74 00121 1

00341
00342

6121121247

~40472

I
I

0121 343
0121344
00345

00346
00347
1210350
1210351
00352
00353
00354
00355
0035f1
00357

Y64

;"4 13 476
741200
61210360
740001

ERROq

7412010

6021360
202)0476
5130453
740200
7421001
5~H'l453

74120tl
6021305

1St
LAW
!lAC
LAC
AND
TAD
DAC
AND
SAD
SKP
JMP
LAC
CMA
DAC
JMP
DAC
SNA
JMP
CMA
SNA
JMP
LAC
AND
S1!A
GMA
AND
SNA
JMP

SVADP
-70
CT 04
SVAOP
K77
(1000
SVAoR
K77
K40

ICOMPLEMENT PATTERN IF EOUAL

t-..164 + ;:>
SVMSTR

ISTART \.11TH t-JEW X-V COMsn
IPATTERN CONTROL WORD

SVMSTR
WCNT .. 2

ICOMPLEMENTED CONTROL WORD

IINCPEMENT X LINE AY 1
IRESTORE

LINE COUNTER

RAG
E1-1
E1-1
BAD
BITSUP

ICHECK FOR FULL WORD ERROR
n"ULL I-IORO ERROR
/FULL \.lORD ERROR
ISEE IF SIT

~UPPRESSED

BITSUP
RTN

18IT SUPPRESSED

0036l'
"0361
0121362
00363
C0364
00365
00366
00367
0037~

00371
00372
30373

2~0473
74004~

22)0476
74004iti
2210477

74004~

200465
740040
75J0('14
740001

~4J453

600305

LAC
HLT
LAC
HLT
LAC
HLT
LAC
HLT
LAS
CMA
DAC
JMP

SVAoR
BAD
GOOD
CNTRL

lAC = FAILING ADDRESS

lAC = BAD DATA
lAC = GOOD DATA
lAC = PATTERN COI\ITROL WORD
ISUPPRESSEO AITS

F11 TSt IP

RTN

IREArJ ANOTHER

IREAO ANO TE S T y L! NE S 0;:> TO 63 \.11TH
IX LINES 00 THRU 63, EACH X LINE wILL
IEOLJAL 000000. AN X LI"JE WILL BE READ 512
ITlM[S AF""TE K WHICH, ALL y LI~ES INTERIS[CTI~G ~IT'" THAT
X LINE wILL BE
I~EAn AND TESTED FOR 8IT ERR()RS,
I

k'lO 3 7 4

2,J.)5?1

00375
0037f
kl0377

J4347S

777777
.'621473

:3URST

..IONS

LAC
OAC
LAW
DAC.

(1000
SVADP
-1

SVADR

II-IRITE 1tS IN 10"0 TO 7777

::lA:;E

LOCK 15
Z04i,'"
012l4l1

,;; 4 ,j4 7 j

1St

c..VA

? i'l.,15 (712

LAC

(1 ?

(j~4l?

=)4v147.$

SAD

C;Vt.

~'040=~

14HH"i

00404
004125

20~501

SKP
JMP
LAC
OAC
TAO
DAC
LAC
OAC
LAW
DAC
Di!M*
LAC*
1St
JMP
LAW
XOR*
SNA
JMP
CMA
DAC
JMp
LAC
TAD
DAC
LAC
AND
SAO
SKP
JMP
1St

Z040~

2'0407
eJ041~

00411
00412
00413
00414
00415

60J376
2412473
340500
04047'
2~0475

BRSTA

Z'4i2J474
77621016
~40455

;;

(1~0?

SVAOR
PATR
PATR
SVLTI-I

-20ee

PATw'"l
SVADR

~0435

74100k1

00437
00440
00441
00442
130443
00444
00445

6120421
440473
440475

013446

200474
SVLT~
LAC
740040
E5
~LT
200476
RAD
LAC
740040
E6
HLT
600430
JMP
CENJ
I
ICONSTANTS A\lD STORAGE REGISTERS
I
dlTSUP LAw
777777
-1
i' 00~00
PATC\iT
J~!H~0eJ~
PATWD
0
~'00460
DATN
,+2
~~00460
\JXTPAT
• +1
463144
463144
631460
631460

~0421

00422
00423
00424
00425
00426
00427
2104312
00431
00432
00433
00434

200503

540473
600230
600411

BUST

CENO

IS~

LAC
SAD
JMP
JMP

11000 IS STARTING ADDR

K10~

~0436

00417
00 4 20

IT EOUAL

",0,,"5

160473
220473
440455
6eHH16
777777
260474
741200
6004312
740001
041£'1476
600446
200500
340474
240474
2005212
500474
540502

eJ041~

IDO'JE"

SVADR

pATWQ
.-2

ISAVES XY COORDINATE

IV LINE ADDRESS
1-512 DECIMAL
ICLEAR LINE XN
IREAD eJ000e10
IDISTURB LINE 512 TIMES

-1

SVLTI-I
CEND
BAD
·E5-1
K100
SVLTI-I
SVLTH
C100e'0
SVLTI-I
(10000
8UST
SVAOC?
PATR
(1100
SVADR
COMP
RRSTA

IDATA MUST BE 777777
ISH aULD NOT SKIP
10K
IERRQR pATH
IV AXIS PLUS 1

IDONE ALL V FOR CURRENT X
IIF EQUAL
IREAD NEXT V ON CURRENT X
IINCREMENT X ADDRESS
IINCREMENT X+Y ADDRESS
IDONE 63 X LINES IF" EQUAL
IWRITE NEXT CHECKERBOARD
ITEST NEXT X WITH Y02
ITHRU V63

00447
00450
00451
00452

00453
2\'21454

00455
0045t-

0eJ457
00461(1
00461

lAC = FAILING
lAC = BAD DATA
IREAD ANOTHER

)(

'1'63 L I ~i

::lA';E

LOCK 1 5
~046?

~2'?25l

C04Cl~
J0 4 b 4

" J~04Li
,_ J ,1077
,'JJi1['1L
;" 00 ~0~'

?04b5

0046f
00467
00470
00471
~0472

00473
00474
120475
00476
00477
0121500
0000 1
("0001
00002
130003
00004
00005
00501
00502
130503

1\4~

><-77

5252 5 21
40
77

:::~TRL

CT~4

ii)

CT16
BITCON

0
v.l

;.:' 212100 1
:'(2100010

L'0~H'JCiI~

:0~0'hj
J0300~

SVAOR
SVLTH
PATR

700000

i3AD

Z21000~
('0~HH~I~

20eJ00e

GOOD

1
0
0
0
0
21
0

~'00100

K1el0

1QJ0

SV~STR

.LOC
60(11~01

JMP

777777
777777
777777
777777
(lQJ00QJ0
0010010

LAW

C'lQJQJ0~
~.

0110l

tAW
AW

.. 1

LAW

... 1

.END
*L
*L
*L

\)0 ERROR

1
1
-1

LINES

-1

:)A:;E

CKHI15
,TITLE CKH!15
/

/PDP-15 dASIC 4K ME~ORY CHECKERBOARD
/SA = 74~12I. (RESIDES IN HIGH - TESTS LOW)
/

ICOPYRIGHT 1969, DIGITAL EQUIPMENT CORP"
/MAYNARD, MASS,
I

IJ. RICHARDSON
I

,ABS
.LOC 1

1211211210 1
0121002
121121003
121121004
12112112!05

60000 1
777777
777777
777777
777777

JMP
LAW
LAW
LAW
LAW

1
-1

-1
-1
-1

.LOC 200
JMP

BEGIN

,LOC 741210
/

74 012!
0741211
07402
07403
07404
0741215

777777
047657
777775
1214766121
21217667
047670

07406
1217407
07410
12!7411
07412
1217413
07414

227671J
047662
107415
447670
447660
6121 74 1216
61217402

12!7 415
12!7416
07417
07420
1217421
0742"
07423
07424
07425
07426
07427

0001211210
107462
207655

1217430
1217431
1217432

777774
26767121
547662

121

BEGIN

LAW
DAe
LAW
DAC
LAC
DAC

_1
BITSUP
PATCNT
PATN
r>JXTPAT

ICONTROL WORD couNT
ICONTROl WORO POINTER

LAC.
CAe
JMS
IS~

NXTPAT
CNTRL
TEST
NXTPAT

ISr
JMP
JMP

CKLP
BEGIN+2

IGET A CONTROL WORD
ISAVE
IWRITE eATTERN AND TEST
IINCREMENT POINTER
IDONE BOTH rr SKIP
100 NEXT PATTERN
1ST ART OVER

-3

CKLP

TEST

~47663

11217467
207663
74412110
(147663
74121200
6074?1
61217571

121
JM5
LAC
CAC
JMS
lAC
RCL
DAC

PATC~JT

WRITE
K1
AITCON
READ
BITCON

IWRITE THE PATTERN
IUSED TO COMPLE~ENT BITS
IRE AD AND TEST
ISETUP FOR

N~XT

8IT

RITCON

S~A

JMP
JMP

caMP

TE5T+4
RURST

ITE5T NEXT BIT P05ITIO~
ITE5T ALL X LINES WITH
IY LINE #61.

-4

r>JXTPAT
CNTRL

ICHECK FOR LAST PATTERN

;lA~E

CKHI15
07433
07434
07435

62 74 1 5

J~P*

TE S T

~47662
~07416

IHAVE DONE

DAC

CNTRL
rEST+l

IWRITE COMPLfMfNT

JMP

CaMPL[MF~T

IGENERATE PATTERN
07436
107437

07440
07441
07442
07443
07444
07445
07446
07447
07450
07451
07452
07453
07454
07455
07456
07457
07460
£lJ7461

J00000
207662

GENPAT

C47664

147665
770400
047666
777704
1047650
207664
047652
777760
047651
207652
744010
047652
7514£lJ0
740001
047661
207661
627436

weNT

COMPL

0
LAC
OAC
D;!M
LAW
DAC
LAW
DAC
LAC
DAC
LAW
DAC
LAC
RCL
DAC
SlL!CLA
CMA
OAC
LAC
JMP.

CNTRL
SVMSTR
SVADR
.7400

ICURRENT CONTROL WORD
ISAVE
IADDRESS COUNTER

SVLT~

-74
CT04
SVMSTR
PATR
-20
CT16
PATR

ICOUNTS V LI"IES
ICURRENT CONTROL WORD
ISAVE
ICOUNTS 16 S~IFTS
ICONTROL WORD

PATR
IWRITE 717777
pATWD
PATWD
GENPAT

IEXIT TO WRITE OR READ

GENPAT
SVADR
CKXY
WRITE

IGET A WORD
IWRITE
ICHECK FOR PATTERN INVERSION
IDONE 7500 IF SKIP

GENPAT
GOOD
8ITCON
SVADR
SvADR
'8ITCON
SVADR
SVADR
SVADR
GOOD

IGET A WORD
ISAVE

07 46 2
07463
07464
07465
07466

1000000

WRITE

107436
067665
1'P506
62 746 2

0
JMS
DAC.
JMS
.JMP*

IREAD AND TEST
07467
07470
07471
07472
07473
07474
07475
07476
07477
07500
07501
07502
07503
07504
07505

000000
107436
047654
207663
267665
067665
207663
267665
067665
227665
547654
741000
607540
107506
627467

READ

RTN

JMS
DAC
L.AC
XOR*
DAC.
L.AC
XOR*
DAC.
LAC.
SAD
SKP
JMP
.. JMS
JMP*

ICOMPLEMENT A BIT
IwRITE wITH INvERTED BIT
IRE-COMPLEMENT
IRESTORE
IREAO
ICOMPARE
10K
IERROR PATH
ICHECK F'OR PATTERN INVERSION
IExlT

ERROR
CKXY
READ

/
I~OUTINE

07506
07507

TO CHECK FOR PATTERN

INVERSIO~

(100000
447666

CKXY

0
Is~

SVL'JJ:L

IDONE 4lt IF SKIP

:lA3E

CKHI15
741~00

07510
07511
07512
07513
07514
07515
07516
07517
07520
el7521
07522

44765tl
74H'l0k:i
607523
20 7 665
347656
047665
447651

07523
07524
07525
07526
07527
07530
07531
07532
07533
07534
07535
07536
07537

44766:>
777704
047650
20 7 665
507647
047665
547646
741000
607520
207664
74121001
047664
607520

f,2 7 506

N64

SKP
JMP.
ISr
SKP
JMP
LAC
TAO
DAC
IS~

6~P452

JMP
JMP

607446

CKXY

CT04
v64
SVADR
K100
SVADR
CT16
WCNT+2
WCNT ... 2

IEXIT TO wRITE OR READ
IOONE WITH V AXIS IF" SKIP
IOONE 64 y LINES
IINCREMENT Y ADDRESS BY 1
ICHECK FOR 16 LOCATIONS
INOT yET
IRESTORE COUNT

Y64

ISiZ
LAW
OAC
LAC
AND
OAC
SAD
SKP
JMP
LAC
CMA
OAe
JMP

SVAOR
.74
CT04
SVADR
K77
SVADR
K40

IINCREMENT X LINE BY 1

N64+2
SVMSTR

1ST ART WITH NEW x-v COMBO
IPATTERN CONTROL WORO

SVMSTR
N64+2

ICOMPLEMENTEO CONTROL WORD

8AO

ISAVE
ICHECK FOR FULL WORD ERROR
1FULL WORD ERROR

IRESTORE Y LINE COUNTER

ICOMpLEMENT pATT[RN IF EOUAL

I
I

07540
07541
07542
07543
1217544
07545
07546
07547
07550
07551
07552
07553
07554

047653
741200
607555
740001
741200
607555
207653
507657
740200
740001
507657
7412013
607504

ERROR

OAe
SNA
JMp
CMA
SNA
JMP
LAC
AND
St A
CMA
AND
SNA
JMP

E1-1
E1-1
BAD
BITSUP

/F"ULL WORD ERROR
ISEE IF BIT SUPPRESSED

BITSUP
RTN

18fT SLJPpRESSED

07555
07556
07557
0756('1
07561
1217562
07563
07564
07565
07566
07567
07570

20 7 665
740040
207653
740040

E1
E2

2ep654

740040
207662
740040
750004
740001
il47657
607504

E3
E.4

LAC
HLT
LAC
HLT
LAC
HLT
LAC
HLT
LAS
CMA
[)AC
JMP

SVADR

lAC

FAILING ADDRESS

lAC

BAD nATA

BAD
GOOD
lAC = GOOD DATA
CNTRL
lAC : PATTfRN CONTROL IoIORD
ISUPPRESSEO RITS
BITSUP
RTN

IREAD AND TEST Y LINES 01 TO 49 WITH X

IREAD ANOTHER

CKHI15
ILINES 00 THQU 63,
EACH X LINE WILL EQUAL
10012101210.
AN X LI~E wILL BE READ 1024 TIMES
/AFTER wHICH, ALL y LINES INTERSECTING.
IwITH THAT X LINE WILL BE READ AND TESTED
IFOR BIT ERRORS.
1

07571
137572

07573
1217574
1217575
07576
07577
076121121
0761211
0761212
0761213
1217604
0761215
0761216
121761217
121761121
1217611
1217612
376 13
1217614
1217615
217616
1217617
0762121
1217621
1217622
07623
1217624
07625
1217626
~7627

121763121
1217631
1217632
1217633
1217634
1217635
1217636
07637
121764£1

147665
777777
067665
447665
21217674
547665
74121121121

BURST
WONS

6~P572

147665
21217656
0476,2
21217652
047666
77601210
047661
167665
227665
447661
612176 11
777777
267666
7412121121
61217623
74121001
047653
607641
21217656
347666
047666
21217674
507666
547674
7410121121
61217614
447665
447652
21217656
547665
6121743121
6121761214

D~M

SVAOR

LAW
DAC.
1St
LAC
SAD
SKP
JMP

-1

D~M

BRSTA

LAC
OAC
LAC
DAC
LAW
OAC
OtM.
LAC.

1St

BUST

CEND

JMP
LAW
XOR.
SNA
JMP
CMA
DAC
JMP
LAC
TAD
DAC
LAC
AND
SAD
SKP
JMP
1st
1St
L.AC
SAD
JMP
JMP

SVADR
SVADR

IWRITE 1'5 IN 01210121 TO

74~121

t741210

SVADR
WONS
SVADR
K10 121
PATR
PATR

IDONE IF' 741210
101210121 IS STARTING ADDRESS
ISAvrs XY COORDINATE

SVLT~

IY LINE ADDRESS

-2000
pATWD
SVADR
SVADR
PATWD
'-2

1 8 112124 DrCIMAL

ICLEAR LINr XN
IREAD 1210fJ000
IDISTURB LINE 1024 TIMES

-1

SVLTH
CENo
BAD
E5-1
Kl121121
SVLTH
SVLTH
(74121121
SVLTH
(741210
BUST
SVAO R
PATR
K10121
SVADR
COMP
BRSTA

IDATA MUST BE 777777
ISHOULD NOT SKIP
10K
IERROR PATH
IY AXIS PLUS 1

IDONE ALL Y ON CURRENT X LINE
IIF EQUAL
IREAD NEXT Y ON CURRENT X
IINCREMENT X ADDRESS
IINCREMENT X+Y ADDRESS

IDONE 64 X LINES IF' EQUAL
IWRITE NEXT CHECKERBOARD
ITrST NEXT X WITH Y0l THRU Y60

/
/

1217641
07642
07643
1217644
1217645

21217666
741211214121
21217653
74121040
6121 7 623

LAC

~LT

LAC
HLT
JtoIP

SVLTH
BAn
CEND

~CONSTAN. AND STORAGE REG.S

lAC = F'AILING X + Y61
lAC = BAD DATA

LI~E

:JA:;E

CK~I15

/
"4~

0210040

"7646
07647
0765e
1217651
07652
1217653
07654
07655
07656
1217657
1217660
1217661
1217662
07663
1217664
1217665
07666
07667
1217670
1217671
1217672
07673

,")00;()77
G0000Z
01210000
J00000
1211210000
1210001210
00001211
012112111210
777777
0121001210
0121121000
0121121000
00001210
00121000
012100121'"
012112101210
1211217671
1211217671
463144
631460
525250

1217674

3012101210
01217400

r<..77
CT04
CT16
PATR
BAD
GOOD
K1
Kl~0

BITSUP
PATC~T

PAHW
CNTRL
8lTCON
SV-"STR
SVADR
SVLTrI
PATN
\JXTPAT

40
77
0
0
0
0
121
1

1121121
lAW
0
121
0
121
0
I(}
I(}

,+2
, +1
463144
631460
525250

.END

*L
"JO ERROR LINES

-1