Table Of Contents - IBM 4300 Manual

Contents
Chapter 1. Introduction 1-1
The IBM 4300 Processors 1-1
Compatibility 1-2
Compatibility Among 4300 Processors 1-2
Compatibility Between 4300 Processors and
System/370 1-2
Control-Program Compatibility
Problem-State Compatibility
Chapter 2. Organization 2-1
Main Storage 2-1
Central Processing Unit 2-2
Program-Status Word 2-2
General Registers 2-2
Floating-Point Registers 2-3
Control Registers 2-3
Input and Output 2-3
Channels 2-4
1-2
1-2
Input/Output Devices and Control Units
2-4
Operator Facilities 2-4
Chapter 3. Storage 3-1
Storage Addressing 3-1
Information Formats 3-2
Integral Boundaries 3-2
One-Level-Addressing Facility 3-3
Storage Size 3-3
Pages 3-4
Page Frames
3-4
Page Description
3-4
Storage Key 3-4
Page Bits
3-4
Page States
3-5
Frame Index
3-5
Page and Frame Control 3-6
Capacity Counts 3-6
Storage-Control Instructions 3-6
Key-Controlled Protection 3-7
Reference Recording 3-8
Change Recording 3-8
Assigned Storage Locations 3-9
Storage While CPU is in Operating State
3-9
Storage While CPU is in Load State 3-10
Chapter 4. Control 4-1
Stopped, Operating, Load, and Check-Stop States
Stopped State 4-2
Operating State 4-2
Load State 4-2
Check-Stop State 4-2
Program-Status Word 4-2
EC and BC Modes 4-3
Program-Status-Word Format in EC Mode
4-4
4-1
Program-Status-Word Format in BC Mode
Control Registers 4-7
Program-Event Recording 4-8
Control-Register Allocation 4-9
Operation 4-9
Identification of Cause 4-10
Priority of Indication
Storage-Area Designation
PER Events 4-11
Successful Branching
Instruction Fetching
Storage Alteration
4-10
4-11
4-11
4-11
4-11
General-Register Alteration 4-12
4-6
Indication of Events Concurrently with Other Interrup-
tion Conditions 4-12
External-Signal Facility 4-16
Timing 4-16
Time-of-Day Clock 4-16
Format 4-16
States 4-16
Setting and Inspecting the Clock
Clock Comparator 4-18
CPU Timer 4-19
Interval Timer 4-20
Externally Initiated Functions 4-21
Resets 4-21
Program Reset 4-23
Initial Program Reset 4-23
Clear Reset 4-23
Power-On Reset 4-24
Initial Program Loading 4-24
Machine Save 4-25
Chapter 5. Program Execution
Instructions 5-1
Operands 5-1
Instruction Format
Register Operands
Immediate Operands
Storage Operands
5-2
5-3
5-3
5-3
5-1
4-17
I
Address Generation 5-3
Sequential Instruction-Address Generation
Operand-Address Generation 5-4
I
Branch-Address Generation 5-4
Instruction Execution and Sequencing
5-5
Interruptions 5-5
Types of Instruction Ending 5-5
Interruptible Instructions 5-6
Point of Interruption 5-6
5-3
Execution of Interruptible Instructions 5-6
Exceptions to Nullification and Suppression 5-7
Storage Change and Restoration for Page-Access
Exceptions 5-7
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