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4979
Description
IBM 4979 Description
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Contents
Table of Contents
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Table of Contents
Table of Contents
Preface
Prerequisite Knowledge
Prerequisite Publications
Related Publications
Display Station Functional Description
Attachment Feature Functional Description
Standard Features
Cycle Steal
Electronic Lock out Feature
Data Protect Feature
Character Set
Basic Components
Display Screen
Keyboard
Controls
Display Operations
Unformatted and Formatted Display Images
Unformatted Mode
Formatted Mode
Data Representation
Keyboard Operations
Cursor
Keyboard
Shift/Lock Keys
Graphic Alphanumeric Keys
Local Function Keys
Interrupt Request Keys
Data Transfer Operations
Direct Program Control (DPC)
Cycle Steal
Initiating a Display Operation
Operate I/O Instruction
Using the IDCB
Input/Output Commands and Display Operations
Command Execution under DPC Mode
Command Execution in CS Mode
Using the DCB
Status Information
Condition Codes
Condition Code 2-Exception
Condition Code 3-Device End
Condition Code 4-Attention
Interrupt Identification Word
Interrupt Information Byte
Interrupt Status Byte
Cycle Steal Status Words
Status after Power and Resets
Appendix A. Otaracters-EBCDIC Hexadecimal Equivalents A-I
Appendix B. Start I/O Examples
DCB Start I/O Examples
START (Read from Buffer) Input
START (Set Cursor and Device Status) Output
START (Write to Buffer/Protected) Output
START (Write/Erase-After to End of Line) Output
START (Shift Lines/Write Protected/Erase After) Output
START (Erase/Unprotected) Output
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