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DEC-12-SE2D-DN

December 1970

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Document:	dec-12-se2d-dn
Order Number:	DEC-12-SE2D-DN
Revision:
Pages:	8
Original Filename:	https://svn.so-much-stuff.com/svn/trunk/pdp8/src/dec/dec-12-se2/dec-12-se2d-dn.pdf

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DEC-12-SE2D-DN
1st Printing December, 1970

This manual is a supplement to the LAP6-DIAIj
Programmer's Reference Manual, DEC-12-SE2D-D.

( C )

1970 by Digital Equipment Corporation

The material in this handbook, including but not limited
to instruction times and operating speeds, is for informa-

tion purposes and is siibject to change without notice.

The following are trademarks of Digital Equipment Corporation, Maynard, Massachusetts:

DEC

PDP

FLIP CHIP

FOCAL

DIGITAL

COMPUTER LAB

For additional copies, order DEC-12-SE2D-DN from Digital
Equipment Corporation, Program Library, Maynard, Mass.
01754.

Price $1,00

TABLE OF CONTENTS

Page
1,0

NEW FEATURES

2.0

SYSTEM IMPROVEMENTS

2.1

RK8 Disks

2.2

LPJ2f8

3.0

Printer

PIP

1
2

3.1

Card Decks

3.2

Reboots trapping

4.1

ASSEMBLER
CHAIN

5.0

EDITOR

4.0

3
3

5.1

Formatting

5.2

Cursor

6.0

SYSTEM INITIALIZATION AND SYSTEM BUILD

7. 0

CORRECTIONS

1.0

NEW FEATURES

DIAL 1 -MS has been modified 2 to provide:

support for

use of an

chaining of sources for assembling

bootstrapping from RFi2f8 or RK8 disk

multiple card deck inputs.

LPJ2f8

RK8 disks

line printer

These features facilitate user interaction with DIAL-MS and expand the
range of supported peripherals.

2.0

SYSTEM IMPROVEMENTS

2.1

RK8 Disks

From 1 to

RK8 disks may be accessed by DIAL-MS.

The acceptable unit

numbers to be used for addressing PDP-12 storage devices for DIAL-MS
commands are:

device
1

2
3
4

1
2
3
4

unit numbers

logical disk units

10-11
10-13
10-15
10-17
10-15
20-25
30-35
40-45

0-1
0-3
0-5
0-7
0-5
6-13o
14-21^
22-27^

RSj2f8 disk
RS08 disks
RS08 disks
RS08 disks
RK8 disk
RK8 disks
RK8 disks
RK8 disks

For example, to save the program JACK on the second of
ceptable coimnands are

RK8 disks, ac-

I
->-SP

JACK, 22

(10^ ]|)gical disk unit)

->-SP

JACK, 24

(12— :(bgical disk unit)

"^LAP6-DIAL is referred to as|t)IAL in this document.
This document is a supplemelt to the LAP6-DIAL Programmer's Reference

Manual, DEC-12-SE2D-D.

For a PDP-12 configuration with more than 1 RK8,
di^k 9 (units 10-15)
should be the last disk accessed before doing any
operation requiring
pressing the I/O PRESET key (as in restarting DIAL)
An error will occur if DIAL-MS is not on the last disk accessed
before the I/O PRESET
and in most systems DIAL-MS resides only on unit
This condition
will arise primarily if a program is loaded by the LO
command from disk
units 20-45. Loading the program USERl from unit
43, for example, by
the command -^LO USERl, 43^
and then calling DIAL-MS (after USERl is
loaded) by pressing I/O PRESET, setting the Left
Switches to 07)01 and
the Right Switches to 7310, pressing DO and then
START 20 will propagate an error.
Call DIAL-MS again to rectify the situation.
.

Addressing non-existent RK8 disks halts the system.

DIAL-MS must be

reloaded to continue.

For a system with RS08 disks, use unit numbers 10-17.

Values from 20-

47 are interpreted as 10-17 by DIAL-MS on such a
configuration.

2.2

LP08 Printer

In addition to the 132 column printer supported
by DIAL-MS, the 80
column LP08 line printer may be interfaced to the
system.
To use the

printer, the only requirement is that it be in the
"ready" status when
DIAL-MS (or PIP) is loaded.

3.0

PIP

3. 1

Card Decks

PIP has been modified to permit entry of more than one
card deck at a
time.
The message calling for more tapes is now

MORE CARDS OR TAPES

— no more tapes
r — read more input
n

Type the appropriate reply, as before.

If an attempt is made to access a non-existent disk via PIP, the mes-

sage NO DISK appears on the screen.

CTRL/D to return to DIAL.

Type CTRL/P to return to PIP or

If the RK8 disk is not functioning properly,

the message DRIVE NOT WORKING is displayed.

Exit as above and check

the disk.

3.2

Reboots trapping

For a PDP-12 system with at least 8K of core and one RS08 or RK8 disk,
PIP returns directly to DIAL-MS without having to read from tape, thereby greatly increasing the speed of this return.

If DIAL-MS is not on

the disk and a return to DIAL-MS on tape is desired, type a carriage

RETURN as the first character after PIP is loaded by the procedure in
section 5.1 of the LAP6-DIAL manual to activate the LINCtape bootstrap.

4.0

ASSEMBLER

4.1

CHAIN

A new pseudo-op, CHAIN, has been added to facilitate assembling large
programs.

A CHAIN statement in the form

CHAIN "NAME" UNIT

placed at the end of one program will call the NAMEd file from the
specified UNIT.

Assembly of the current program is terminated and that

of the called program is initiated.

enclosed in quotes.

Note that the file NAME must be

A program which was called for assembly by a CHAIN

statement can include another CHAIN statement, thus placing no limit
on the number of files that can be assembled together-

If a UNIT is

not specified, the assembler will look for ttie indicated program on
the same unit as the program currently being assembled.
1

Note that a response of A (read another tape)
an acceptable reply for
previous versions of PIP, is properly interpreted by this version of
DIAL-MS for the user's convenience.
,

If the program currently being assembled is in the working area,
rather

than saved on tape, and no unit is specified, the assembler looks
for
the called program on unit 10,

When a CHAIN statement is encountered during assembly, the mode is
reset to LINC mode and the line number counter is reset to zero so
that
the line numbers in the called program will match the scope line
niambers.

For this reason, there will be more than one section in the listing
with
the same line numbers.

To facilitate debugging, the assembler prints the message "CHAINING
name" on the output device, where "name" is the file which is starting

to be assembled.

The message is printed on both passes of the assembler.

Consider the following output.

CHAINING LNCN

CHAINING BWDN
0037 US

CHAINING TNNY
0045 IR
0067 IR

CHAINING MNSF

In this example,

programs (the initial one, plus LNCN, BWDN, TNNY,

and MNSF) have been assembled as one file.

The errors encountered

were an undefined symbol at line 37 of program BWDN and illegal references at lines 45 and 67 of program TNNY.

If an error occurs in the CHAIN statement itself, the message CH (chain

error) is printed and assembly is terminated.

The CHAIN pseudo-op obsoletes the SAVSYM and LODSYM pseudo-ops for

systems using DIAL-MS.

;5.0

EDITOR

5. 1

Formatting

The automatic formatting featiire of the DIAL Editor has been expanded
to accommodate programs that require repression of tag field formatting.

For example, the FPP (Floating Point Processor) Assembler uses a comma
to distinguish between the core address and the index register field

Sense Switch 0 now controls format-

in a memory reference instruction.

ting by the Editor.

When SSW^=0, the standard DIAL formatting is impleSpecifically,

mented; when SSWJ?=1, the new formatting is activated.

when SSWJ3=1, a tab can be typed between the instruction and the core
address which when a comma is typed after the core address causes no

shift into the tag field or movement of the slash for the comment field.
For example

Typed
SSWJ2(=j2f

SSWi2f=l

Displayed
FLDA(space)200,2
FLDA (space) 20)21, 2
FLDA( tab) 200,2
DIS, FLDA (tab) 200,2

FLDA2j2(0,
FLDA 200,

DIS,

2
2

FLDA 200,2
FLDA 200,2

5.2

Cursor

I
Users familiar with the previous version of DIAL-MS will notice that

with this version the cursor flickers on the scope.

This feature was

implemented to facilitate locating the cursor in a lengthy display.

6.0

These

SYSTEM INITIALIZATION AND SYSTEM BUILD
2

procedures (described in sections A. 3 and A. 2, respectively, of

the LAP6-DIAL manual) no longer require that an EXIT command be issued

DIAL-MS commands and statements can

to preserve the Editor's pointers.

be accepted directly.

7.0

CORRECTIONS

The following is a list of corrections to LAP6-DIAL
Programiner s Reference Manual, DEC-12-SE2D-D.
'

Page 2-3

For the example in section 2.4 the input
typed
jf ^
should be

JMP ENT (not SET 12)

Page 3-3

Note that the letters I and U cannot be
used
as user-defined symbols (Section 3.2.1-b)

Page 3-9

When using the LISTAPE pseudo-op to output
to
a mass storage device, the next
sequential logical dxsk unit will be used if the
requested
unit
^
becomes full.

Page 4-12

When exiting to the User's Monitor Command/
the extended operations buffer remains
in
extended address mode.

Page A-3

The illustrations for the Right Switches
for
System Initialization and System Startup are
reversed.
The correct Right Switches settings
for System Initialization are:
4,4.4,

f 4'4'

f f4'

t++

The correct Right Switches settings for
System
Startup are
^ 4- i

Page B-1

fft

4- 4-

tft

An error message has been added
C M

Comma Mistake - a comma was
used illegally.