HP Vectra Technical Reference Manual page 55

AL
=
Card Identifier
Data
OOH
41H
42H
43H
44H
45H
46H
51H
Definition
Non HP card with ROM and possibly its own INT 10H driver.
MultiMode Video Display Adapter
Reserved
Reserved
Reserved
Industry Standard Monochrome Display Adapter
Industry Standard Color Display Adapter
Reserved
CL
=
Current value of Extended Control register. This register is only valid when the
Card Identifier is 41 H.
This description applies to data returned when a MultiMode Video Display Adapter is in the
system.
Bit Data
0
0
1
0
1
2
0
1
3
0
1
4
0
1
5
0
1
6-7
Registers Altered: AX,CL
Definition
Current screen resolution
200 line
400 line
Underline enable.
'Blue' bit of foreground attribute interpreted as color blue.
'Blue' bit of foreground attribute interpreted as underline.
Font Selected.
Standard-8
HP-ROMAN-8
Memory disable.
Memory enabled for CPU access.
Memory disabled for CPU access.
16/32K Memory select.
Wrap second 16K of RAM into first 16K.
Allow access to full 32K of memory.
Page select.
Select first 16K of memory.
Select second 16K of memory.
Unused
46 Video