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IBM 29 - Table of Contents

IBM 29
46 pages
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Contents
ISM
29
Card Punch,
with
Left-Zero Insertion . . . . . . 1-1
Comprehensive
Introduction
. . . . . . . . . . . . . . . . . . . . . . . . 1-1
Left-Zero
Program
Card
. . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Left-Zero
Error
Reset Key . . . . . . . . . . . . . . . . . . . . . . . 1-2
Theory
of
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Read-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
BCD
Code
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5
Read-in Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Read-out, Punch-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Punch-out
Timing
(8-Column Field) . . . . . . . . . . . . . . . . 1-9
Left-Zero
Credit
Field
. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Credit
Read-in
..................................
1-12
Credit
Read-out, Punch-out
.......................
1-13
Punch-out Timing (3-Column
Credit
Field)
..........
1-13
Left-Zero Logic Controls
..........................
1-15
Purpose
of
Left-Zero Relays and Points . . . . . . . . . . . 2-1
Instructional Wiring Diagram . . . . . . . . . . . . . . . . . . . . 3-1

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