Digital PDFs

MAINDEC-8E-D0JC-D

December 1971

18 pages

Original

0.4MB

Document:	maindec-8e-d0jc-d
Order Number:	MAINDEC-8E-D0JC-D
Revision:
Pages:	18
Original Filename:	https://svn.so-much-stuff.com/svn/trunk/pdp8/src/dec/maindec-8e-d0j/maindec-8e-d0jc-d.pdf

OCR Text

rum-x"
r'v

tognfxffCAfxou

IESQ-anqflpepl

pnoouc? cubs:

MAxNDEc-as-oaJc-n

Pnooucf NAMEi

RANDOM

DATE CREATEDi

JUNE

MAINTAINERi

oxacuoarxc snoop

aufuoni

anus: HANSIN

anéans 7537

11. 19?1

‘3va m]

ABSTRACT

pcuonucg

THTs Is A DIAGNOSTIC PROGRAM Ta TEST THE JMS INSTRUCTION OF THE
RANDOM FROM AND To ADDRESSES ARE SELECTED FOR EACH
PDPaBE.
THE JMP TNSTRucTTON Ts TESTED 1N THAT EACH TEST REQUIRES
TEST,
A JMP To REACH TNE 4M5}

REQUIREMENTS
puug-nopusun

2.1

EQUIPMENT
p-oqunogg

PDPIBE EQUIPPED HXTH TELETYPE.

2}2

STORAGE
pacifigfi
'

LOCATIONS aaaa;asva

THE BTNART LOA5£R MUST BE STORKD IN THE LAST MEMORY PAGE:
2.3

PRILSHTNARY RRpcRARs
I.!"-..§I‘

Hfi-IIQQI

ASSURED THAT ngxnoEc-aE-DTATNT. 1ND MATNoEc-aE-oaatNT HAVE

BEEN RUN SUCCESSFULLY.

a}:

RRQCEDQR;

I‘VEPFI

Q‘ODQHOg.

METHOD
I'F','Q'

use THE STANDARD BINART LOADER

STARTING

431

coNTRoL
e;----,u

SR5(0!
SR263)
snazzy
snatla
SRatfl)

4.2

PRocEfiuRE

suchN sETTstg
91);”!
9-299--.I

HAIT 0N ERROR;

HOLD THE FROM ADDRESS cONSTANT

SEEECT.RANDON PROM ADDRESSES

HOLD THE To ADDRESS CONSTANT
SELECT RANDOM To ADDRESSES

STARTING

ApORgss

9.....--

ycaq-ag

UZEG
RESTART

ADDRESS

MQiS

:DERATDR

AQTION

pncocgpn

p.-—.q

AND PRESS LOAD ADDRESS;

SET SR

IF IT IS DESIRED TO SET EITHER SR2 OR SR3. THE FROM OR TO
ADDRESS MAY BE SPECIFIED 8V ENTERING THE ADDRESS INTO TH!
LOCATIONS SHONN BELOW

FROM
TO

0200

9
s

LOCATION 13:

LOCATION 131

IT SR2 OR SR3 :8 SET AFTER THE PROGRAM HAs BEEN STARTED._TR£
LAST AOOREss TAKEN FROM THE RANOON NUMBER GENERATOR Is uOEB

REREATEDLT}
ngss OLEAR. ANO TREN

OONT;

OPERATINO RROOEOORE
t-cw-OQQQ

v--9-P!!l

SAME AS SECTION 4.

(RICH!
Q-OQQ.

ERROR

MALT:

'0...

I."'

ALL UNUSED MEMORY LOOATIONO ARE LOAOEO WITH HLT
IV THE PROORAN Ex: utEs ONE or TREOE aAOKOROONO

INOTRuOTIONst
HLTSA IT I9
To OOOOR VOLLOHING HE
OOREOO RAT as ONEOKEO A, AN

THAT ONE NTERRORT
HE
RON AND TO
INOTROOTION.
TIRE TO LOCATE TR: TEOT ONO INOTRUOTIONs.

PROBABLE

6}!

ERROR

ARINTOUTQ

...-.

.....-...

TO TTY?

xxxx

I70)

INNNN)

Ifli

rAiLED

HHHH
s

RRRR

EXPLANATION
poo-oonfltsq

(FROM!
ITO)

F XXXXI

TO vvvvt

XXXX

ADDRESS OF

JMS

INSTRUCTION BEING

vav a ADDRESS THAT THE JHS

TESTED:

INSTRUCTION Is OOINO

To.
(70) - NNNN; NNNN : THE CONTENTS OF THE ADDRESS
EOUAL xxxx + 12

TO}

THIs

SHOULD

INNNN) . RRRRI> NNNN Is THE ADDRESS MINUS ONE THAT HAS STOREO
RRRR Is THE CONTENT OF
LOCATION OOOO DURING THE INTERRUPTt
ADDRESS

)

NNNN;
~

)

6}2.2

EXAMPLES

THE roLLONINC Is
OCCURRED:
P

FORCED ERROR PRINTOUT HHERE ND ERROR

525$ TO 6354

ITO)

(6354)

5237
a

523?

THE TEsT JNs INSTRUCTION NAs IN LOCATION 5236.
THE JHS NA:
TRYING TO JUMP TO LOCATION 6354.
THE CONTENTS or TO (LOCATION
6354) NAs 5237.
THIS Is CORRECT SINCE THE PC Is STORED DN A

JHS INSTRUCTION.

TO GAIN ANY KNDNLEOCE FROM THE THIRD LINE or THE PRINTOUT. THE
usER NUST uNoENsTAND THE SEOUENCE or EVENT: NNEN A JMS INsTROCTIoN
As AN END REsuLT or THIS SEOUENCE.
Is FOLLONED av AN INTERRUPT.
THE ADDRESS or THE LOCATION rOLLONINC THE CELL NNERE THE F6
STORED I8
DERIVE TuIs THIRD LINE Of
INTO CELL C.
:6
PRINTOUT. TNE DONEss IN CELLD Is DECREMENTED av ONE AND
ON THE TELETTPEI TNEN THE CONTENTS or TNAT Aoonsss ARE FRINTEO'.

PLAch

THE

.To

TOLLONINC Is

a;
PNIN

TYPICAL ERROR PNINTOUT.

r 5235 To A354

ITO)

I4354I

Tana
a

5:59

A STATEMENT or THE PROBLEM.
LINE 2 31?:
THAT THE CONTENTS Dr LOCATION D354 ARE NOT 5237 As THEY snauLfi
BE. auT ARE 74i2 INSTEAD‘.
7408 Is A HLT INSTRUCTION.
SINCE
'HEHORY Is FILLED NITN A BABKGRDUND or NLT ORDERS. IT I:
EVIDENT
THAT THE PC HAS NOT STORED 1N LOCATION 635‘ DURING THE JMS.

LIN5118 ACAIN SIMPLY

LINE 3 OF THE PRINTDuT REVEALS HHERE THE PC NA: CTDRED.
SINCE
ON THE INTERRUPT 4355 uAs STORED IN LOCATION EERO AND IADDII
CONTAINS THE CORRECTLT STORED PC. 5237, IT Is APPARENT THAT I
JUMP ERROR DCC RRED.
THE JHS
SHOULD HAVE JUMIEC TO
BIT 1 HAS LOST'
6354. BUT IT A TUALLT JUMPED To 4354.

INSTRUCTION

THE FOLLOHING
F

TO 6354

5236

(T0)

(6354)

Is ANOTHER TVPIGAL ERROR PRINTOUT.

7237
a

7237

LINE 1 Is AGAIN SIMPLY A STATEMENT or THE PROBLEM.
LINE 2 SETS}
THAT YHE CONTENTS OF‘LOCATION 6354 ARE NOT 5237 As exREcTEO. OUT
ARE INGTEAO 7237;
SINCE THE CONTENTS ARE NOT A HLT OROER. 733:.
IT Is EVEOENT THAT THE PC NAs OTOREO MERE. OUT THE NUMBER
STOREO NAs NRONG;
COMPARING THE GOOO (5237). AND THE BAD ITOOTI.
IT Is APPARENT_THAY GIT I NAs "PICKED UP” OURING THE STORE Re
OPERATION OF THE JHS INSTRUCTION;
ERROR

REOOUERT

THE PROGRAM CONTINUES TESTING PDLLOHING AN ERROR RRINTOUT;
NHEN
ENOUGH INFORMATION HAS BEEN GATHEREO FROM THE :RROR PRINTOUs,
A
PROM ANO TO AOOREss Is SELOOTEO rOR us: IN THE score Moo:
GOO.
ENTER THE CHOSEN AOORESSES INTO PROPER LOCATIONS TOE: SECTION.
ENTER 5554 INTO LOOATION 1 ANO REOTART THE PROGRAM NITM
9.5.3).
SR2 ANO GR: GET;
THE

SOOPE MOOE LOOP Isi
LOOATION

OOOING

OIOO

GOO:

JH! i 'RDHi

xxxx

JMS 1 TO

OIOA

FROM 1 A

TO OIOGONTINUE TN: séORE
I72OOI or LOCATION 1 AND

REGTRIOTIONG
'O.‘...’...Q

(NONE)

MISCELLANEQUS
pong-noqp-qnq

ION

MOOE LOOP. REOTORE THE ORIGINAL OONTENTG
RESTART;

BZi

EXECUTION TIRE
cud-unq-n

---,

4,726 RANDOM TESTSISECOND

RROCRAN

DESCRTRTTON

poo-nu.

ngno-ucnouq

IS CHECKED THROUCH USE OF THE INTERRURT
RANDOM
FUNCTION;
NUMBER GENERATOR SELECTs A ERON AND A TO
AN ION TNSTRUCTTON :3 THEN PLACED AT FROM -1 AND THE
ADDRESS.
THE RROORAN JUMPS TO THE ADOREss
JMS INSTRUCYXON AT FROM}
SPECIflfio BY TO;
AFTER EXECUTTNO THE ION AND JHS XNSTRUCT!ON§,
AN INTERRUPT DCCURs STARTING THE PROGRAM COUNTER AT LO§A?!ON‘;.
A CHECKING ROUTINE LOCATED HERE VEeriEs THAT THE OPERATION HA:
SUCCESSFUL BEFORE STARTING THE NEXT TEST;
THE

JMS INSTRUCTION
A

RANDOM ADDRESSES ARE RESTRICTED AS FOLLOWS!

5600<RANDOM A

ADDRESS<7600
THE

AREA_DETHEEN Doug AND 76!!

Is FILLED HxTH HLT

IN CASE THE INTERRUPT rAst.
”JG"

)8 PRINTED IFTER EVERY 01g!!! 7:573}

TNSTRUCTIONS

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IEND MARK

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IRANDOM JMP-JMS TEST
$14$

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72$$
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