INT 10 - VIDEO - ALTERNATE FUNCTION SELECT (PS, EGA, VGA, MCGA)
|
Input |
Output |
|
AX
|
12h |
|
|
|
AX |
|
BX
|
|
10h |
Colour Mode |
Memory
Installed |
BX |
|
CX
|
|
|
Feature |
Switch Settings |
CX |
|
DX
|
|
|
|
|
DX |
| ES:DI |
|
|
ES:DI |
Return EGA information
Color Mode: 0 = Color Mode (3Dx)
1 = Mono Mode (3Bx)
Memory: 0 = 64K memory
1 = 128K memory
2 = 192K memory
3 = 256K memory
|
Input |
Output |
|
AX
|
12h |
|
|
|
AX |
|
BX
|
|
20h |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
DX
|
|
|
|
|
DX |
| ES:DI |
|
|
ES:DI |
Select alternate print screen routine
|
Input |
Output |
|
AX
|
12h |
Scan Lines |
|
12h if Success |
AX |
|
BX
|
|
30h |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
DX
|
|
|
|
|
DX |
| ES:DI |
|
|
ES:DI |
Select vertical resolution for alphanumeric modes (VGA only)
Scan Lines: 00h = 200 scan lines
01h = 350 scan lines
02h = 400 scan lines
|
Input |
Output |
|
AX
|
12h |
Flag |
|
12h if Success |
AX |
|
BX
|
|
31h |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
DX
|
|
|
|
|
DX |
| ES:DI |
|
|
ES:DI |
Enable/Disable default palette loading (VGA/MCGA)
Flag: 00h = enable default palette loading
01h = disable default palette loading
|
Input |
Output |
|
AX
|
12h |
Flag |
|
12h if Success |
AX |
|
BX
|
|
32h |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
DX
|
|
|
|
|
DX |
| ES:DI |
|
|
ES:DI |
Enable/Disable Video Addressing (VGA/MCGA)
Flag: 00h = enable video
01h = disable video
|
Input |
Output |
|
AX
|
12h |
Flag |
|
12h if Success |
AX |
|
BX
|
|
33h |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
DX
|
|
|
|
|
DX |
| ES:DI |
|
|
ES:DI |
Enable/Disable default gray-scale summing (VGA/MCGA)
Flag: 00h = enable gray scale summing
01h = disable gray scale summing
|
Input |
Output |
|
AX
|
12h |
Flag |
|
12h if Success |
AX |
|
BX
|
|
34h |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
DX
|
|
|
|
|
DX |
| ES:DI |
|
|
ES:DI |
Enable/Disable alphanumeric cursor emulation (VGA only)
Flag: 00h = enable cursor emulation
01h = disable cursor emulation
|
Input |
Output |
|
AX
|
12h |
Flag |
|
12h if Success |
AX |
|
BX
|
|
35h |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
|
|
|
|
|
DX |
| ES:DX |
Ptr
to 128 byte Buffer (AL=0,2,3) |
|
ES:DI |
PS/2 Display-switch interface
Flag: 00h initial adapter video off
01h initial planar video on
02h switch active video off
03h switch inactive video on
80h *UNDOCUMENTED* set system board video active flag
|
Input |
Output |
|
AX
|
12h |
Flag |
|
12h if Success |
AX |
|
BX
|
|
36h |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
DX
|
|
|
|
|
DX |
| ES:DI |
|
|
ES:DI |
Video refresh control (VGA/PS)
Flag: 00h = enable refresh
01h = disable refresh
|
Input |
Output |
|
AX
|
12h |
|
|
|
AX |
|
BX
|
55h |
00h |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
DX
|
|
|
|
|
DX |
| ES:DI |
|
|
ES:DI |
??? (used by ATI and TAXAN)
|
Input |
Output |
|
AX
|
12h |
|
|
|
AX |
|
BX
|
55h |
02h |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
DX
|
|
|
|
|
DX |
| ES:DI |
|
|
ES:DI |
??? (used by ATI and TAXAN) |