HP Vectra Technical Reference Manual page 336

APPENDICES
TABLE OF CONTENTS
A. BIOS INTERRUPTS
331
A.1 Interrupt Vector Assignments
331
A.2 51D-B105 Interrupt and Functions
334
A.3 EX-BIOS Drivers and Functions
339
B. MEMORY MAP
349
B.1 System Memory Map
349
B.2 51D-BIOS Data Structures
350
8.2.1 RS-232 Communication Port Addresses
351
8.2.2 Parallel Printer Port Addresses
352
B.2.3 Equipment Byte Data Area
352
B.2.4 Keyboard Data Area
353
B.2.5 Flexible Disc Data Area
355
8.2.6 Video Display Data Area
357
B.2.7 Option ROM Data Area
358
8.2.8 Timer Data Area
358
B.2.9 System Data Flags
358
8.2.10 Hard Disc Data Area
359
8.2.11 Printer Timeout Counters
359
B.2.12 Keyboard Buffer Pointers
360
B.2.13 Enhanced Graphics Adapter (EGA) Data Area
360
8.2.14 Flexible Disc Rate Area
360
8.2.15 Extended Hard Disc Data Area
361
8.2.16 Extended Flexible Disc Data Area
361
8.2.17 Keyboard Mode Indicator
362
8.2.18 Real-time Clock Data Area
363
8.2.19 Pointer to EGA Data Area
364
Appendices 327