HP Vectra Technical Reference Manual page 367

40:063H
02 S40_CRT_PORT---.ADR Base I/O port address for active video
controller
40:065H
01 S40_CRT_MODE_SELREG Mode select register copy
Color palette register copy
B.2.7 Option ROM Data Area
This area is used by the POST (SYSGEN) routine.
40:067H
02 S40--XROM_INIT---.ADR
40: 069H
02 S40--XROM_SEGMENT
40:06BH
01 S40--XROM_INT_FLAG
B.2.8 Timer Data Area
This area stores the current timer count and flags.
40:06CH
02 S40_TIMLLOW
40:06EH
02 S40_TIMLHIGH
40:070H 01 S40_TIMLOVLFLOW
B.2.9 System Data Flags
Offset address for optional I/O rom init
routine
Segment address for optional I/O rom
Flags last interru pt that occu rred
Least significant word of timer count
Most significant word of timer count
24-hour timer tick rollover counter
This area used by the system to flag
<
CTRL > -
<
Break> and
<
CTRL > -
<
Alt > -
<
DEL>
requests.
358 Memory Map