IBM 7090 User Manual

CONTENTS
1. O. 00 INTRODUCTION TO THE IBM 7090 5.3.03
Fixed-Point Arithmetic Instructions
55
DATA PROCESSING SYSTEM
5 5.3.04
Floating-Point Arithmetic Instructions
68
1.1. 00 General System Operation . 5 5.3.05
Transfer Instructions
91
1. 2. 00 Functional Parts of a Computer System 5
5.3.06
Trap Mode Instructions
97
-1.3.00 7090 System Make-up
6 5.3.07
Skip Instructions
99
1.
4.00
7090 General Logic
9 5.3.08
Control Instructions
107
1. 4.
01 The Stored Program 10
5.3.09
Sense Indicator Instructions
111
1.
4.02 Exercises 10 5.3.10
Index Transmission Instructions
119
5.3.11 AND and OR Instructions
128
2.0.00 COMPUTER OPERATIONS 12 5.3.12
Convert Instructions
132
2.1. 00 Storage Word Designation
12
5.3.13
Floating-Point Trap
141
2.2.00
The 7090 Word 12
2.2.01 Numeric Quantity (Data) Word
12
6.0.00 IBM 7151 CONSOLE CONTROL UNIT
144
2.2.02
CPU Instruction Word
12
6.1.00 Operator's Panel
146
2.2.03 Data Channel Command Word
14
6.1.01 Indicators
146
2.3.00 Fundamental Components
14
6.1.02
Manual Controls
149
2.4.00 A + B = C, Print C
17
6.1.03
Manual Control Keys
151
2.5.00 Other Components, Instructions and 6.2.00
Customer Engineer's Test Panel
158
Commands
21
6.2.01 Indicators
158
6.2.02
Switches
162
3.0.00
CPU INTERNAL FUNCTIONS
23
6.3.00
Marginal Check Panel
165
3.1. 00 Functional Components
23
3.1.01 Storage Register (SR) 28
7.0.00
REFERENCE INFORMATION
166
3.1.02
Accumulator Register (AC) 28
7.1.00
Condensed Logic
166
3.1.03
Multiplier-Quotient Register (MQ)
28
7.1.01
Adders
166
3.1.04 Sense Indicator Register (SI)
28
7. 1.
02
Address Register
166
3.1.05 Index Registers (XR) 28
7.1.03
Program Register
166
3.1.06 Program Register (PR) 29
7.1.04
Sense Indicators
166
3.1.07 Shift Counter (SC)
29
7.1.05
Sh ift C ounte r 168
3.1.08 Program Counter (PC)
30
7.1.06
Program Counter
168
3.1.09 Address Register (AR)
32
7.1.07
Accumulator
168
3.1.10 Address Switches (AS)
32
7.1.08
Multiplier Quotient
168
3.1.11
Tag Registers
32
7.1.09
Index Registers
170
3. 1. 12
Adders (AD)
32
7.1.10
Storage Register
170
3.2.00
Instruction Decoding and Processing 36
7.2.00
Service Aids
170
3.2.01 Operation Decoders
36
7.2.01
One Card Programs
170
3.2.02 Control Circuits 36
7.2.02
Voltage
174
3.2.03 Pulses
36
7.2.03
Adjustment of C Pulse Set
174
3.3.00
Basic Cycle
36
7.3.00
Operator's Panel
176
7.3.01
Console Indicators
176
4.0.00
IBM 7606 MULTIPLEXOR
38
7.3.02
Indicator Lights
177
4.1. 00 Multiplexor Functional Units
38
7.3.03
Unitized Assembly Lights & Keys
178
4.1. 01 Multiplexor Clock
38
7.3.04
Switches and Keys
178
4.1.02 Multiplexor Storage Bus 41
7.3.05
Plastic Rocker
178
4.1. 03 Multiplexor Storage Bus OR'ing 43
7.3.06
Reset Motor
178
4.1.04 Multiplexor Address Switches 43
7.4.00
CE Panel
179
4.2.00
Data Flow and Control
43
7.4.01
Indicator Lights
179
4.2.01
CPU to C ore Storage . 43
7.4.02
Switches and Receptacles
179
4.2.02 Core Storage to CPU .
44
7.5.00
Marginal Check Panel
180
7.5.01
MC Switches
180
5.0.00
CPU DATA FLOW AND TIMING
45
7.5.02
MC Meters
180
5.1.00 I Cycle 45
7.6.00
Tailgate
181
5.2.00 Indirect Addressing
45
7.6.01
Signal Connectors
181
5.3.00 Instructions 47
7.6.02
Power Connector s
181
5.3.01
Word Transmission Instructions
47
5.3.02
Shifting Instructions
53
APPENDIX
183

IBM 7090 Specifications

General

Category	Mainframe Computer
Introduced	1959
Transistor-based	Yes
Word Length	36 bits
Add Time	4.8 microseconds
Memory	Core memory
Memory (words)	32, 768 words