Specifications

105
Bit Description
0,1 (reserved)
2 0:
1:
CRT display
LCD display
3 0:
1:
autocentering on
artocentering off
5,4 00:
01:
10:
11:
normal graphics and inverted text
normal graphics and mormal text
inverted graphics and text
(reserved)
6 0:
1:
vertical expansion on
vertical expansion off
9,8 00:
01:
10:
11:
800x600 pixel at 56 Hz
800x600 Pixel at 60 Hz
800x600 pixel at 72 Hz
800x600 pixel (16 colors) at 72 Hz and
800x600 pixel (256 colors) at 60 Hz
11,10 00:
01:
1024x768 pixel (16 colors) interlaced
1024x768 pixel (16 colors) at 60 Hz
13,12 00:
01:
1024x768 pixel (256 colors) interlaced
1024x768 pixel (256 colors) at 60 Hz
14 0:
1:
no simultaneous display on CRT / LCD
simultaneous display on CRT and LCD
15 (reserved)
Table 31, INT 10h AX= 7F7Fh / BX = 4201 h, Set Extended Status Information
AX= 7F7Fh BX = 4201h set extended status information
CX= status information
AX = 7F7Fh BX=4300h set power-on condition
CX= value for INT 15h call (CMOS-value)
AX = 7F7Fh BX=4400h return power-on condition
BL= value of power-on condition
AX = 7F7Fh BX=4500h return version numbers of VGA BIOS
BL= 1. digit of version number
CH= 2. digit of version number
CL= 3. digit of version number
AX = 7F7Fh BX=4700h return type of connected monitor (dynamic)
BX= status information
CX= status information