IBM RT Series Hardware Reference Manual page 139

Contents
Description .................................... 1
Major Components .......................... 3
Modes of Operation ......................... 5
Basic Operations ............................ 8
Registers ................................. 12
Programming Considerations ..................... 62
Programming the Registers ................... 62
RAM Loadable Character Generator ........... 69
Creating a 512 Character Set ................. 70
Creating an 80 by 43 Alphanumeric Mode ....... 71
Vertical Interrupt Feature .................... 72
Creating a Split Screen ...................... 73
Compatibility Issues ........................ 74
Interface ..................................... 76
Feature Connector ......................... 76
Specifications ................................. 79
System Board Switches ...................... 79
Configuration Switches ...................... 80
Direct Drive Connector ..................... 83
Light Pen Interface ......................... 84
Jumper Descriptions ........................ 85
Logic Diagrams ................................ 87
BIOS Listing ................................. 103
Vectors with Special Meanings ............... 103
Index ........................................ Index-l
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