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IBM
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7090
IBM 7090 User Manual
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184
Table of Contents
Table of Contents
3
00 Introduction to the Ibm 7090
6
General System Operation
6
Functional Parts of Acomputer System
6
7090 System Make-Up
7
7090 General Logic
10
The Stored Program
11
Exercises
11
Computer Operations
13
Storage Word Designation
13
The 7090 Word
13
Numeric Quantity (Data) Word
13
CPU Instruction Word
13
Data Channel Command Word
15
Fundamental Components
15
A+B = C, Print C
18
Other Components, Instructions and
22
Commands
22
Cpu Internal Functions
24
Functional Components
24
Storage Register (SR)
24
Accumulator Register (AC)
24
Multiplier-Quotient Register (MQ)
24
Index Registers (XR)
24
Program Register (PR)
24
Address Switches (AS)
27
Tag Registers
33
Adders (AD)
33
Instruction Decoding and Processing
37
Operation Decoders
37
Control Circuits
37
Pulses
37
Basic Cycle
37
Ibm 7606 Multiplexor
39
Multiplexor Functional Units
39
Multiplexor Clock
39
Multiplexor Storage Bus
42
Multiplexor Storage Bus Or'ing
44
Multiplexor Address Switches
44
Data Flow and Control
44
CPU to Core Storage
44
Core Storage to CPU
44
Cpu Data Flow and Timing
46
I Cycle
46
Indirect Addressing
46
Instructions
48
Word Transmission Instructions
48
Fixed-Point Arithmetic Instructions
56
Floating-Point Arithmetic Instructions
69
Transfer Instructions
92
Trap Mode Instructions
98
Skip Instructions
100
Control Instructions
108
Sense Indicator Instructions
112
Index Transmission Instructions
120
AND and or Instructions
129
Convert Instructions
133
Floating-Point Trap
142
Ibm 7151 Console Control Unit
145
Operator's Panel
147
Indicators
147
Manual Controls
150
Manual Control Keys
152
Customer Engineer's Test Panel
159
Indicators
159
Switches
163
Marginal Check Panel
166
Reference Information
167
Condensed Logic
167
Adders
167
Address Register
167
Program Register
167
Sense Indicators
167
Sh Ift C Ounte R
169
Program Counter
169
Accumulator
169
Multiplier Quotient
169
Index Registers
171
Storage Register
171
Service Aids
171
One Card Programs
171
Voltage
175
Adjustment of C Pulse Set
175
Operator's Panel
177
Console Indicators
177
Indicator Lights
178
Unitized Assembly Lights & Keys
179
Switches and Keys
179
Plastic Rocker
179
Reset Motor
179
CE Panel
180
Indicator Lights
180
Switches and Receptacles
180
Marginal Check Panel
181
MC Switches
181
MC Meters
181
Tailgate
182
Signal Connectors
182
Power Connector S
182
5
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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