HP Vectra Technical Reference Manual page 57

On Entry: AX
=
F1 O_MOD_INFO (6F03H)
BH
=
Mask. Bits with a mask value of 11
1
are not modified; bits with a mask value of
10
1
are modified.
BL
=
Bits to change. The bits indicated
by
the mask (BH) take the value of the BL
register.
Bit Data
a
a
1
a
1
2
a
1
3
a
1
4
a
1
5
a
1
6-7
Definition
Current screen resolution
200 line
400 line
Underline enable.
IBlue
l
bit of foreground attribute interpreted as color blue.
IBlue
l
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.
Reserved
On Exit: No values returned.
Registers Altered: AX
Example:
MOV AX,F10_MOD-'NFO
MOV BL,00000100B
MOV BH,11111011B
INT 10H
,. EX-BIOS Function Modify
,. Ex-Reg (6F03H)
,. Select Character Font: HP-ROMAN-8
,. Only Modify Character Font
,. Call Video Interrupt
This function returns the current video mode and screen resolution.
48 Video