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Manuals
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NCR Manuals
Computer Hardware
Century 200
Reference manual
NCR Century 200 Reference Manual
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Contents
Table of Contents
Bookmarks
Table of Contents
Table of Contents
Introduction
The NCR Century 200 Processor
The NCR Century 200 System
Extended Memory
Extended Bandwidth
Extended I/O Simultaneously
Multiprogramming
Floating Point Option
Logic and Table Compare Commands
Multiply Command
Interval Timer
Thermal I/O Writer
Remote I/O Writer
Operator Alarms
Peripheral Options
Memory
Physical Description
Data Representation
NCR Century Code Chart
Examples of Data Representation
Memory Addressing
Conversion Table
Hexadecimal/Decimal Conversion
Index Registers
Index Registers and Reserved Memory Areas
Functional Description
Memory/Processor Communication
Control
Timing
Functional Operation
Information Transfer
Arithmetic Logic Unit
Commands
Century Hardware Command Format
Command Code - Q
Index Register - RA
Indexing
No Indexing and Indexing
A2A1 Characters
Length
Index Register - RB
B2B1 Characters
Implied T and B Operation
Move a Right to Left
Add Signed
Compare Signed
Asynchronous Operation
Live Registers
Memory Registers
Special Registers
Processor Live Registers
Flags
Processor Flags
Indicators
Processor Indicators
Addressing
Address Flow to the Address Register
Adder
Data Flow through the Adder
Data Registers
Expanded Registers
Base System Registers
Command Setup and Execution
Between Commands Testing
Error Indicator
Memory Error
Program Error And/Or Trapping Command Code
Command Code Indicator
Repeat Indicator
Trace Permit
Interrupt Permit
I/O Control
General Description
Trunks
Common Trunk Concept
High-Speed Trunks
System Configurations
Base System
Quadraplex System
Octaplex System
Data
Bandwidth
Trunk Bandwidth
System Bandwidth
Peripheral Types
Integrated Peripherals
Freestanding Peripherals
Simplified Level
Selection
Peripheral Selection
The Peripheral Address Field
PAF Formats
S2 Status Character
Busy
Data Transfer
Standby
Inoperative
Command Initiated
I/O Control Operation
Response Number
Control Word
Standard Control Word Format
S3 Status Character Transmission
Termination
Normal Processor Termination
S3 Status Character
Normal Peripheral Termination
Special Peripheral Termination
Special Processor Termination
Operation Complete
Segment Complete
Error
System Overload
S4 Status Characters
Write Lockout
Special
Transmission Error
Latent Memory Error
Latent Program Error
Interrupt Permit and Interrupt Indicator
Options
Trace Option
Trace Execution
Trace with Monitor
Monitor Register
Extended Simultaneity Option
High-Speed Trunk Option
System I/O Bandwidth
Multiprogramming Option
User and Supervisor Starter
Base Addressing Register and Limit Address Register
BAR/LAR - User State
Command Setup and Execution - no Indexing
Indexing Specified
BAR/LAR - Supervisor State
LAR - Additional Function
BAR - Additional Function
Bar/Lar Functional Flow
Privileged Commands
The RESTORE Command
Status Word
Additional Console Features
The LOAD BAR Command
Extended Memory Option
Accuracy
Halt
Decrementation Without the Extended Memory Option
Decrementation with the Extended Memory Option
Incrementation
Compatibility
Decrementation or Negative Displacement
Incrementation or Positive Displacement
315 Compatibility Option
1401 Compatibility Option
Operator's Console
Integrated I/O Writer
Standard I/O Writer
NCR Century 200 Specifications
Physical Specifications
Environmental Specifications
Operating Limits
Basic Hardware Commands
Optional Hardware Commands
Examples
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