Compaq Super VGA chips.
3CEh index Fh:
writing 5 to this register unlocks the extended registers.
3CEh index 45h: Bank register
bit 0-7 Bank number in 4k blocks.
ID Compaq super VGA:
rp.bx:=0;
rp.cx:=0;
vio($bf03):
if rp.ax=$BF03 then Compaq.
Video Modes:
2Eh G 640x480 256c packed
59h G 800x600 16c planar
Compaq BIOS extensions:
----------10BF00-----------------------------
INT 10 - VIDEO - Compaq Portable Extensions - SELECT EXTERNAL MONITOR
AX = BF00h
Note: all registers preserved and the internal monitor is blanked
the external monitor becomes the active monitor
SeeAlso: AX=BF01h
----------10BF01-----------------------------
INT 10 - VIDEO - Compaq Portable Extensions - SELECT INTERNAL MONITOR
AX = BF01h
Note: all registers preserved and the external monitor is blanked
the internal monitor becomes the active monitor
SeeAlso: AX=BF00h
----------10BF02-----------------------------
INT 10 - VIDEO - Compaq Portable Extensions - SET MASTER MODE OF CURRENT CTRLR
AX = BF02h
BH = master mode
04h CGA
05h EGA
07h MDA
SeeAlso: AX=BF03h
----------10BF03BX0000-----------------------
INT 10 - VIDEO - Compaq Portable/Systempro Extensions - GET ENVIRONMENT
AX = BF03h
BX = 0000h
Return: BH = active monitor
00h = external
01h = internal
BL = master mode
00h = switchable VDU not present
04h = CGA
05h = EGA
07h = MDA
08h = switchable LCD controller present
CH = 00h (reserved)
CL = switchable VDU mode supported
bit 0 = CGA supported
bits 1,2 = reserved (1)
bit 3 = MDA supported
bits 4-7 = reserved (1)
DH = internal monitor type
00h = none
01h = Dual-mode monitor
02h = 5153 RGB monitor
03h = Compaq Color monitor
04h = 640x400 flat panel
07h = LCD VGA
DL = external monitor type
00h = none
01h = dual-mode monitor
02h = 5153 RGB monitor
03h = Compaq Color monitor
04h = 640x400 flat panel
05h = VGC monochrome
06h = VGC color
SeeAlso: AH=1Ah,AX=BF00h,AX=BF01h,AX=BF02h
----------10BF04-----------------------------
INT 10 - VIDEO - Compaq Portable Extensions - SET MODE SWITCH DELAY
AX = BF04h
BH = new state of delay
00h enabled
01h disabled
SeeAlso: AX=BF05h
----------10BF05-----------------------------
INT 10 - VIDEO - Compaq Systempro Extensions - ENABLE/DISABLE DISPLAY
AX = BF05h
BH = new state of video
00h off
01h on
SeeAlso: AX=BF04h
----------10BF06-----------------------------
INT 10 - VIDEO - Compaq SLT/286 - READ GRAY SCALE TABLE
AX = BF06h
CL = address to be read from gray scale table
Return: AL = bit 3-0 - Value read from gray scale table
CL = address to be read from gray scale table
SeeAlso: AH=12h/BL=33h,AX=BF07h
----------10BF07-----------------------------
INT 10 - VIDEO - Compaq SLT/286 - WRITE GRAY SCALE TABLE
AX = BF07h
CH = value to write to gray scale table
CL = address to be written to gray scale table
SeeAlso: AX=BF06h
----------10BF08-----------------------------
INT 10 - VIDEO - Compaq SLT/286 - WRITE COLOR MIX REGISTERS
AX = BF08h
CH = bits 7-4 - Green weight
bits 3-0 - Blue weight
CL = bits 7-4 - unused
bits 3-0 - Red weight
