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MAINDEC-12-D6BA-D-P

2000

18 pages

Original

1.3MB

Document:	VR12 Display Test
Order Number:	MAINDEC-12-D6BA-D-P
Revision:	0
Pages:	18
Original Filename:	http://bitsavers.org/pdf/dec/pdp12/diagnostics/MAINDEC-12-D6BA-D-P_VR12_Display_Test.pdf

OCR Text

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IDENTIFICATION

Product

Code :

Product Name:

VR12 Display Test

Date Created:

June 6 , 1969

Maintainer:

Diagnostics Group

Author:

Dave Ferrarini

e.
/i1. Y1 emti n 'c

•

Maindec 12-D6BA-D(P)

DIS /;:> t 5 t

e
1.

/\BSTRACT
This program tests the PDP-12 Display System by generating
three distinct patterns o n the scope, two with the DIS
Instruction , and one with the DSC Instruction .

REQUIREMENTS

2.1 EQUIPMENT
a.

PDP-12A or PDP-12B

2 . 2 STORAGE
Most of locations 4000
3.

60008

PROCEDURES

3 . 1 METHOD

Mount a DI/\L Tape on Unit

Set mode to LINC and depress I/O Preset twice .

Set LSW=701

Depress Start

Call the program from the

RSW=7300 and hit the DO toggle .
2~ .

ASR by :

DIS TEST , ~ )

'7 7 7 :t

DIAL Loader wi 11 halt at "'5ii!I& .

Depress I/O Preset .

Depress Start

i .

Restart Procedure:

This program is also available on Binar y Paper Tape .

to execute .
Depress Start

2~.

OPERATOR ACTION
Upon starting, the program will alternately display the three
patterns, each for approximatel y ten seconds .
a.

Freeze on current pattern .

Striking the key F will direct the program to lock
into the routines that are controlling display of the
current pattern .
b.

Alternate between three patterns .
Striking any key but F will direct the program to alternate the display between the three patterns . It should
be noted that requesting the alternate sequence while
in alternate mode or the freeze sequence while in free z e
mode has no effect.

PROGRAM DESCRIPTION
a.

The pattern generated by the DSC instruction takes the
following form :
(QUANDRANT 2 )I

(QUADRANT)

CHAN ¢
HALF SIZE

CHAN 1
FULL SIZE

(QUADRANT

CHAN ~

CHAN l
HALF SIZE

(QUADRANT 4)

l FULL SIZE

The pattern does what the display says . One half of
one character is displayed in one corner of the scope ,
then half of one character is displayed in the opposite corner of the scope . The left half of the character in quadrants 2 and 4 are displayed first, then the
left half of the charac ter in quadrants l and 3 are
displayed . When the left half of all characters on the
scope have been displayed the sequence is repeated for
the right half of the characters .

[

,..
~

....

.........

'
.......

.......

.Jc 1-

One pattern generated by the
t.be tollowing form :

DIS I nstruction takes

..
_..._

-1.

•
_._

-1.

..
T

..L

_..._

...L

This permits calibration of the scope .

Display a cross .
This pattern is two diagnonal lines f r om the bottom left
corner to the top right corner of the display , and bottom
right to top left .
It is used when setting up the D/A
converters of the VC12 Display System .

NOTE :

Setting sense switch ~ to a o ne wi ll
to the Dial monitor .

cau se a return

•2"1

'"'10<1!11
<71PH11 l

W?\r.\?

1 1 ' 1 If

/DIS TEST
VERSION ~
/ PnP - 12 nISPLAY CONTROL AND SCOPE TEST

1'' H'I 5
11(;1•1 (,

/C:()PYR I C.HT

1969

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