Basic Input/Output System; Bios Interrupt Summary - HP Vectra Reference Manual

SECTION 3. BASIC INPUTI
OUTPUT
SYSTEM
The Basic Input/Output System (BIOS) is a set of programs that is
stored in the ROM on the processor extension card in the FOOOO
segment. For a more complete description of the BIOS refer to
HP
Vectra Technical Reference Manual Volume
2:
System BIOS.
Table 3.1
BIOS Interrupt Summary
Address
Range INT BIOS Entry Summary
8-B 2 NMI Parity error is
detected.
14-17 5
PRINT SCREEN Default routine that
prints the video
screen characters.
20-23
8 TIMER INT Called each clock
tick (18.2 sec.).
24-27
9
KEYBOARD INT Handles keyboard
activity and
controller.
40-43 10 VIDEO 10
Handles all video
reads and writes,
palettes, lightpens,
and scrolling.
44-47 11
EQUIPMENT
Reports attached
DETERMINATION devices, i.e., printers,
RS-232 ports,video,
disc drives, 80287.
Basic Input/Output System 53