HP Vectra Technical Reference Manual page 41

MOVAX,O
MOVES,AX
MOV AX,ES: [6FH*4
+
2J
MOVES,AX
MOV AX,ES: [V_SVIDEO
+
4J
MOVES,AX
;segment at
0
,
;read the base address
;of the HP_VECTOR_TABLE
;read base address of
;video parameters
The addresses listed are offsets into this data segment. The following table gives the data
maintained in V_SVIDEO/s (0054H) data segment:
Table 3.2
Video EX-BIOS Data Structures
Variable Name
Offset
Type Definition
Driver Header
0-5
Byte Device Header Attributes, Name, Index,
and Default Vector
VID_PRIMARY
6
Byte The current primary display:
00 Card at I/O Address 3BOH
01 Card at I/O Address 3COH
-~
02 Card at I/O Address 3DOH
03 Card containing ROM Code.
VID_SECONDARY
7
Byte If two cards are in the system, same
number as VID_PRIMARY for the
second card.
VID_FOUND_ROM
8
Byte Flag set to true if ROM code was found
in any video adapter card.
VID_IDS
9-0CH
Byte List of IDs of all cards found.
VID_STATUS
OD-010H
Byte RAM copies of the status register.
VID_EXT_STATUS
11-014H
Byte
RAM copies of the extended status
register for each possible card in the
system.
VI D_PARM_BLOCK
15-03BH
Byte Reserved for saving the video
parameters stored in the standard BIOS
data area when switching between
primary and secondary video boards.
VID_LAST_IBM_MODE
03CH
Byte Used to detect if a 'rogue' program
changed the modes without telling the
HP system.
VID_EXT_MODE
03DH'
Byte Specifies the current video mode
(0 ... 15).
3E-03FH
Byte Reserved
32 Video