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MAINDEC-12-D1BA-D

September 1969

12 pages

Original

0.5MB

Document:	JMP Self
Order Number:	MAINDEC-12-D1BA-D
Revision:	000
Pages:	12
Original Filename:	https://svn.so-much-stuff.com/svn/trunk/pdp8/src/dec/maindec-12-d1b/maindec-12-d1ba-d.pdf

OCR Text

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MAINDEC ~12-D‘I BA

Product Name:

JMl:SELF
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Date Created:

September 12, I969

Maintainer]:

Diagnostic Group

Author:

James Kelly

'D‘I‘GITAL

©"1969

EQUIPMENT CORPORATION

ABSTRACT

The JMP Self test is a worst case test of the core memory Read/Write gates. The program
loads all of core memory from address 0240 to 7777 inclusive in bank 0 and the entire
memory bank for extended memories to (JMP Self)
‘

The program types a blank character on the teletype, turns on program interrupt and
iumps to the memory location to be tested in either memory bank 0 or the selected ex—
tended memory. When the program interrupt occurs, a test is made to be sure that we
interrupted from the correct memory location. Any errors will be indicated by.an error
halt and

message

typeout, depending

the switch settings.

MACHINE REQUIREMENTS
A standard POP-5, 8, 8/5, 8|, 8L, l2 or Linc-8.
An ASR-33 teletype or equivalent.

If the POP-5 being tested has extended memory, the CIF and CDF

instructions must be

compatible with the POP-8.
2 2

Preliminary Progr_ams

All basic instruction and memory diagnostics must have been successfully run prior to at—

tempting to run (JMP Self).
LOADING PROCEDURES
3 l Method
.

This program must be loaded with the binary loader. If you are unfamiliar with the proper
binary loading procedures, refer to the User Handbook for your computer.
a

Set the teletype reader switch to FREE.

Open the teletype reader and insert the program tape so that the. arrows on the tape
are visible to, and pointing toward the operator.

Close the reader and set the reader switch to START.

Set the teletype front panel switch to ON-LINE.

Set the LEFT switches to 7777.

f.
9.

h.
i.

i.
k.

Set the RIGHT switches to 4000.
Set the MODE switch to 8 mode.

Depress l/O preset.
Depress START LS.
When the program tape has been read in, the computer Will halt.
The ACCUMULATOR must be equal to 0000, if it is not, an error has occurred and
one might try reloading the binary loader.

STARTING PROCEDURE
Remove the paper tape from the teletype reader.
Set the three right most switches SR9, TO, 11 to the number of the memory bank
in a basic machine with no extended memory, this would be 000.
you wish to test.

Set the MODE switch

:«orxo

8 mode.

Depress l/O preset.
Depress START 20.

The program, when properly running, will cause the PROGRAM COUNTER and
MEMORY ADDRESS register to appear to be counting up, and the lON indicator

will

light.
Attempting to test extended memory in a 4K machine will over-write the
diagnostic and destroy the program.

‘

NOTE:

Switch Settings

4.!

in general, switches O, i, 2 allow the test engineer to select the mode of error indication, i.e. type out or error halt. The normal mode with switches 0, i, 2 on a zero is
an error

halt.

Suppress halt; depress continue for printout or loop
Suppress typing
Scope Loop on error

SROO

SRO]

SR02

To modify these circumstances procede as follows:

These designated switches have an order of precedence associated with them, which is

designed for maximum flexibility.
In the event of an error, the first switch to be tested is switch 0; if it is O the computer

If it is a i, i.e. suppress halt, we test switch l.
is 0 the following "typical" error message will ensue:

will halt at address 0063.

lf switch i

JMP.

GOO D
0377

BAD

ADDR

0357

5357

This message is interpreted as follows:

i) The "GOOD" address from which the program interrupt should haye occurred.
other words, the address of the (JMP.) we were supposed to be performing.

2) The ”BAD" address from which the program interrupt actually occurred.

3) The ”ADDR" number refers to the contents of the ”good" or memory location under
test. in this case it can be seen that bit 07 of the (JMP.) instruction was dropped
causing the computer to Jump Not to itseif in 0377, but rather to 0357.
4)

the number under BAD will be the address GOOD ti.
This
usually indicates that bit $2 was dropped changing the JMP self to JMS self
and inserting the current address +i into the current location.
some

cases

Placing

the

RIM

console keys

and

loader

switches

by way of the operator
accompliéhed as follows:

core

memory

starting address 7756 in the LEFT switches.
first instruction (6032} in the RIGHT switches.
Press the FILL switch, then press FILL STEP.
Set the next instruction (6031) in the RIGHT switches.

Press

Repeat

Set

the
the

‘

been

the

FILL
steps d

STEP switch.
and e until all

instructions

have

deposited.

in RIM format, plaCe the tape in the reader,
to the starting address 7756 of the
switches
LEFT
RIM loader (not of the program being read), press the START
LS key, and start the Teletype reader.

Toriead
set

tape

the

BINARY FORMAT PERFORATED TAPE
’Once

the

tape

RIM

the

Loabsiz

loader is in core, place the binary loader program
Set the
teletype reader and turn the reader on.

switches to 7756, depress I/O preset with the mode switch
mode, then depress START L3. ‘The binary tape will read
The reader must be turned off manually as the tape
core.
reaches the end, since RIM does not stop.
LEFT

in 8
into

APPENDIX A

PDP-B

READIN

The

MODE

PERFORATED-TAPE

LOADER

readin mode

(RIM)

loader

minimum

length, basic,

It is initially
perforated-tape program for the 33 ASR.
stored in memory by manual use of the operator console
The loader is permanently stored in
keys and switches.

locations

37.

page

loader can only be used in conjunction with the
reader
33ASR
(not the high-speed perforated-tape reader).
Because a tape in RIM format is, in effect, twice as long
as
it need be, it is suggested that the RIM loader be used
only to read the binary loader when using the 33 ASR.
The

RIM

Some PUP-12 diagnostic program tapes
(NOTE:
format).

The

complete FDR-12

Absolute

Octal

Address

Content

7756
7757

6032
6031

RIM

loader

(SA=7756)

Instruction

Tag

KSF

7760

5357

JMP-l

7761,
7762,
7763,
7764,
7765,
7766,

6036
7106
7006
7510
5357
7006

KRB
CLL

7767,
7770,
7771,
7772,
7773,
7774,
7775,
7776,

6031
5367
6034
7420
3776
3376

KSF

5356

JMP

7777

Sxxx

RIM

follows:

Comments

/CLEAR Ac AND FLAG
/SKIP IF FLAG=1
/LOOKING FOR CHARACTE]
/READ BUFFER

BEG,

are

RTL

RTL
SPA
JMP BEG+1

RTL

/CHANNEL 8 IN A00
/CHECKING FOR LEADER
/FOUND LEADER
/OK, CHANNEL 7 IN
LINK

JMP—l

/READ, Do
/CHECKING

KRs
SNL

DCA

TEMP

DCA TEMP
BEG

TEMP,
,

JMP

NOT

FOR

CLEAR
ADDRESS

/STORE CONTENT
/STORE ADDRESS
/NEXT WORD
/TEMP STORAGE
/JMF START OF BIN
LOADER

MAs .

MAYNARD.
PAGE

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