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DEC-12-UZSA-D

2000

6 pages

Original

0.3MB

Document:	MAGSPY
Order Number:	DEC-12-UZSA-D
Revision:	0
Pages:	6
Original Filename:	http://bitsavers.org/pdf/dec/pdp12/diagnostics_set2/DEC-12-UZSA-D.pdf

OCR Text

c
PDP-12
LIBRARY

MAGSPV
A MOVING WINDOW FOR SCANNING LINC-TAPE

Order DEC-12-UZSA-D from Program Library, Digital Equipment
Corporation, Maynard, Mass. 01754

Price $1.00

Direct comments concerning this document to:
Software Information Service
Digital Equipment Corporation
Maynard, Massachusetts 01754

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ABSTRACT
This program provides a moving window for scanning data stored on a LINC-tape. The data is scanned
on the PDP-12 scope at a rate determined by the setting of the Analog-Digital Knob 7. The data can
be interpreted as waveforms or as packed ASCII characters.

EQUIPMENT REQUIREMENT
The minimum configuration is the PDP-12A which consists of the LINC-tape drive, A-D circuits,
Teletype, Scope, and 4K of core.

OPERATING PROCEDURE
1. START Dial:
a.

Stop the processor, by pressing STOP.

Press l/O PRESET.

c. With 0701 in the Left Switches and 7300 in the Right Switches, press the
DO switch.
d.

Upon termination of tape motion, press START 20.

2. CALL MAGSPY:
a.

Type:

- LO MAGS PY, unit)
where unit signifies the tape drive unit containing the LINC-tape with MAGS PY in
its file. (If "NO" appears, check your index for MAGSPY by typing:
) , then --DX, unit ) ) .
b. If the processor ha Its with the Program Counter equal to 7576, press I/O PRESET,
and ST ART 20.
3. PROGRAM TITLE SLIDE:
The program initially displays PROGRAM "MAGSPY" (DIGITAL EQUIPMENT CORPORATION) for a
short period of time, then proceeds to the initial option questionnaire (no operator action required).
4. OPTION SELECTION SLIDE:
a.

The user now can type in one of the following options:
1.

To display the Explanation Slide

To display the Block/Unit questionnaire Slide

To return to the DIAL System.

RUBOUT

To erase the previously typed character.

b. After the desired entry has been typed, press LINE FEED to execute the desired
option.

5. EXPLANATION SLIDE (Option 1):
Selection of Option One displays the various switch settings and waits for the operator to type a LINE
FEED or RETURN indicating that he has read the displayed slide,
6. BLOCK/UNIT QUESTIONNAIRE (Option 2):
Type in the starting tape Block Number (BN), which may be 0 to 777. Leading zeroes are not requirap
so that BN 7 may be typed by: 7 ~ , 07 ~or 007 ~ . Upon observing the correct BN on the scope,
press the RETURN ( ~ ) key.
Type in the tape drive number - which may be 0 through 7. If the correct entry is observed on the
scope, type LINE FEED to begin displaying tape blocks. (This is the issue version of QANDA - see
Document DEC-12-FISA-D for operational details.)
7. CALL DIAL (Option 3):
. This option recalls the DIAL system into core without using the Left, Right, DO, and START 20 switches.
: This option may also be used anytime during program execution by restarting MAGSPY.
8. RESTART:
To restart MAGSPY in order to select another option, tape drive, or initial starting Block Number:
a.

Press STOP

Set 4020 in the Left Switches

Press START LS

9. WAVEFORM DISPLAY:
· This option is in effect whenever Sense Switch 0 is pressed. The data on the tape blocks is interpreted
as vertical coordinates for a point display. The Unit and Block Number display is initially in full-size
character mode. However, it may appear in half-size character mode if this was the last mode when
returning from TEXT Display.
The vertical line marks the division between blocks. To display increasing tape Block Numbers, turn
the Analog-Digital Knob 7 counter-clockwise. A clockwise rotation will move toward the beginning
of the tape. A center position ha Its the display.
Waveform examples have been stored on your tape under a Source Program called TESTDATA. Do not
attempt to add this to the working area of the DIAL System since it doesn't meet the criteria for a

source program. To move TESTDATA to another tape without copying the entire tape:
a. Create a dummy source file by adding long source programs until you have a 46 block
program filed on your tape.
b. Note the starting Block Number and copy 46 blocks from your tape to the new tape by
using the command:
-+CP)

Relative
Block No.

(_'

Contents

00-01

a continuous (two block) FM waveform

02-03

a continuous (two block) 0.7 ms filtered (20-650 cps) waveform

04-05

a continuous (two block) 0 .4 ms filtered (20-1300 cps) waveform

10-11

a continuous (two block) low pass filtered (600 cps) waveform

12-13

a continuous (two block) low pass filtered (1200 cps) waveform

14-15

a continuous (two block) low pass filtered (2400 cps) waveform

16-17

a continuous (two block) 500 cps burst

20-21

a continuous (two block) 1Kc burst

22-23

a continuous (two block) 2Kc burst

24-25

a continuous (two block) 4Kc burst

female adult ECG

fetal ECG

abnormal looking adult ECG

maternal and fetal ECG

the last ECG

33-36

four independent exponential waveforms in order of increasing decay;
each exponential is one block.

Doubly differentiated Gaussian

Singly differentiated Gaussian

Gaussian distribution

7 cps sine wave

15 cps sine wave

4 cps cosine wave

12 cps cosine wave

10. TEXT DISPLAY:
If Sense Switch 0 is not pressed, the data on tape is interpreted as packed -ASCII i.e., 0162 wi II appear

as an "A2" on the scope. When Sense Switch 1 is pressed, the text is displayed in full-size mode otherwise, data is displayed in ha If-size mode.
The current Block Number and Unit is displayed at the top of the scope. A horizontal bar indicates the
end of the current block. A carriage return on the tape wi II create a new source line on the display.
DIAL Sources are stored in packed ASCII.
Rotation of the Analog-Digital Knob 7 counter-clockwise will move the display toward the end of the
tape (NB 0 0 0 follows BN 7 77) while rotation in the opposite direction displays data toward the beginning of the tape. A center position maintains a steady display.

11. SUMMARY OF ACTIONS:

Procedure

Action

swo = 1
swo = 0

Display data as waveforms

SWl = 0

Display data as small text if SWO == 0.

SWl = l

Display data as large text if SWO = 0.

A-D Knob 7)

Move toward the beginning of the tape.

A-D Knob 7 ~

Move toward the end of the tape .

Display data as packed-ASCII Source

The above procedures can be changed at will. However, to call the DIAL system, change tape drive
units, or to advance over a large portion of the tape - the RESTART procedure, covered earlier, must
be used.