Int 10 Fn 00 - Video - Set Video Mode [V]
AH = 00h
AL = desired video mode (see #0009)
Return: AL = video mode flag (Phoenix, AMI BIOS)
20h mode > 7
30h modes 0-5 and 7
3Fh mode 6
AL = CRT controller mode byte (Phoenix 386 BIOS v1.10)
Desc: specify the display mode for the currently active display adapter
Notes: IBM standard modes do not clear the screen if the high bit of AL is set
(EGA or higher only)
the Tseng ET4000 chipset is used by the Orchid Prodesigner II, Diamond
SpeedSTAR VGA, Groundhog Graphics Shadow VGA, Boca Super X VGA,
Everex EV-673, etc.
the installation check for Ahead adapters is the signature "AHEAD" at
C000h:0025h
the installation check for Paradise adapters is the signature "VGA=" at
C000h:007Dh
the installation check for Oak Tech OTI-037/057/067/077 chipsets is the
signature "OAK VGA" at C000h:0008h
the installation check for ATI adapters is the signature "761295520" at
C000h:0031h; the byte at C000h:0043h indicates the chipset revision:
31h for 18800
32h for 18800-1
33h for 18800-2
34h for 18800-4
35h for 18800-5
62h for 68800AX (Mach32) (see also #0656)
the two bytes at C000h:0040h indicate the adapter type
"22" EGA Wonder
"31" VGA Wonder
"32" EGA Wonder800+
the byte at C000h:0042h contains feature flags
bit 1: mouse port present
bit 4: programmable video clock
the byte at C000h:0044h contains additional feature flags if chipset
byte > 30h (see #0008)
the installation check for Genoa video adapters is the signature
77h XXh 99h 66h at C000h:NNNNh, where NNNNh is stored at C000h:0037h
and XXh is
00h for Genoa 6200/6300
11h for Genoa 6400/6600
22h for Genoa 6100
33h for Genoa 5100/5200
55h for Genoa 5300/5400
for SuperEGA BIOS v2.41+, C000h:0057h contains the product level
for SuperEGA BIOS v3.0+, C000h:0070h contains the signature
"EXTMODE", indicating support for extended modes
See Also: AX=0070h,AX=007Eh,AX=10E0h,AX=10F0h,AH=40h,AX=6F05h,AH=FFh"GO32"
See Also: INT 33/AX=0028h,INT 5F/AH=00h,INT 62/AX=0001h,MEM 0040h:0049h
Index: installation check;Tseng ET4000|installation check;Ahead video cards
Index: installation check;Oak Technologies|installation check;ATI video cards
Index: installation check;Paradise video|installation check;Genoa video cards
Bitfields for ATI additional feature flags:
Bit(s) Description (Table 0008)
0 70 Hz non-interlaced display
1 Korean (double-byte) characters
2 45 MHz memory clock rather than 40 MHz
3 zero wait states
4 paged ROMs
6 no 8514/A monitor support
7 HiColor DAC
(Table 0009)
Values for video mode:
text/ text pixel pixel colors disply scrn system
grph resol box resolution pages addr
00h = T 40x25 8x8 320x200 16gray 8 B800 CGA,PCjr,Tandy
= T 40x25 8x14 320x350 16gray 8 B800 EGA
= T 40x25 8x16 320x400 16 8 B800 MCGA
= T 40x25 9x16 360x400 16 8 B800 VGA
01h = T 40x25 8x8 320x200 16 8 B800 CGA,PCjr,Tandy
= T 40x25 8x14 320x350 16 8 B800 EGA
= T 40x25 8x16 320x400 16 8 B800 MCGA
= T 40x25 9x16 360x400 16 8 B800 VGA
02h = T 80x25 8x8 640x200 16gray 4 B800 CGA,PCjr,Tandy
= T 80x25 8x14 640x350 16gray 8 B800 EGA
= T 80x25 8x16 640x400 16 8 B800 MCGA
= T 80x25 9x16 720x400 16 8 B800 VGA
03h = T 80x25 8x8 640x200 16 4 B800 CGA,PCjr,Tandy
= T 80x25 8x14 640x350 16/64 8 B800 EGA
= T 80x25 8x16 640x400 16 8 B800 MCGA
= T 80x25 9x16 720x400 16 8 B800 VGA
= T 80x43 8x8 640x350 16 4 B800 EGA,VGA [17]
= T 80x50 8x8 640x400 16 4 B800 VGA [17]
04h = G 40x25 8x8 320x200 4 . B800 CGA,PCjr,EGA,MCGA,VGA
05h = G 40x25 8x8 320x200 4gray . B800 CGA,PCjr,EGA
= G 40x25 8x8 320x200 4 . B800 MCGA,VGA
06h = G 80x25 8x8 640x200 2 . B800 CGA,PCjr,EGA,MCGA,VGA
= G 80x25 . . mono . B000 HERCULES.COM on HGC [14]
07h = T 80x25 9x14 720x350 mono var B000 MDA,Hercules,EGA
= T 80x25 9x16 720x400 mono . B000 VGA
08h = T 132x25 8x8 1056x200 16 . B800 ATI EGA/VGA Wonder [2]
= T 132x25 8x8 1056x200 mono . B000 ATI EGA/VGA Wonder [2]
= G 20x25 8x8 160x200 16 . . PCjr, Tandy 1000
= G 80x25 8x16 640x400 color . . Tandy 2000
= G 90x43 8x8 720x348 mono . B000 Hercules + MSHERC.COM
= G 90x45 8x8 720x360 mono . B000 Hercules + HERKULES [11]
= G 90x29 8x12 720x348 mono . . Hercules + HERCBIOS [15]
09h = G 40x25 8x8 320x200 16 . . PCjr, Tandy 1000
= G 80x25 8x16 640x400 mono . . Tandy 2000
= G 90x43 8x8 720x348 mono . . Hercules + HERCBIOS [15]
0Ah = G 80x25 8x8 640x200 4 . . PCjr, Tandy 1000
0Bh = reserved (EGA BIOS internal use)
= G 80x25 8x8 640x200 16 . . Tandy 1000 SL/TL [13]
0Ch = reserved (EGA BIOS internal use)
0Dh = G 40x25 8x8 320x200 16 8 A000 EGA,VGA
0Eh = G 80x25 8x8 640x200 16 4 A000 EGA,VGA
0Fh = G 80x25 8x14 640x350 mono 2 A000 EGA,VGA
10h = G 80x25 8x14 640x350 4 2 A000 64k EGA
= G . . 640x350 16 . A000 256k EGA,VGA
11h = G 80x30 8x16 640x480 mono . A000 VGA,MCGA,ATI EGA,ATI VIP
12h = G 80x30 8x16 640x480 16/256K . A000 VGA,ATI VIP
= G 80x30 8x16 640x480 16/64 . A000 ATI EGA Wonder
= G . . 640x480 16 . . UltraVision+256K EGA
13h = G 40x25 8x8 320x200 256/256K . A000 VGA,MCGA,ATI VIP
14h = T 132x25 Nx16 . 16 . B800 XGA, IBM Enhanced VGA [3]
= T 132x25 8x16 1056x400 16/256K . . Cirrus CL-GD5420/5422/5426
= G 80x25 8x8 640x200 . . . Lava Chrome II EGA
= G . . 640x400 16 . . Tecmar VGA/AD
15h = G 80x25 8x14 640x350 . . . Lava Chrome II EGA
16h = G 80x25 8x14 640x350 . . . Lava Chrome II EGA
= G . . 800x600 16 . . Tecmar VGA/AD
17h = T 132x25 . . . . . Tecmar VGA/AD
= T 80x43 8x8 640x348 16 4 B800 Tseng ET4000 BIOS [10]
= G 80x34 8x14 640x480 . . . Lava Chrome II EGA
18h = T 80x30 9x16 720x480 16 1 A000 Realtek RTVGA [12]
= T 132x25 . . mono . B000 Cirrus 5320 chipset
= T 132x44 8x8 1056x352 mono . B000 Tseng Labs EVA
= T 132x44 9x8 1188x352 4gray 2 B000 Tseng ET3000 chipset
= T 132x44 8x8 1056x352 16/256 2 B000 Tseng ET4000 chipset
= G 80x34 8x14 640x480 . . . Lava Chrome II EGA
= G 1024x768 16 . . Tecmar VGA/AD
19h = T 80x43 9x11 720x473 16 1 A000 Realtek RTVGA [12]
= T 132x25 8x14 1056x350 mono . B000 Tseng Labs EVA
= T 132x25 9x14 1188x350 4gray 4 B000 Tseng ET3000 chipset
= T 132x25 8x14 1056x350 16/256 4 B000 Tseng ET4000 chipset
= T 132x34 . . mono . B000 Cirrus 5320 chipset
1Ah = T 80x60 9x8 720x480 16 1 A000 Realtek RTVGA [12]
= T 132x28 8x13 1056x364 mono . B000 Tseng Labs EVA
= T 132x28 9x13 1188x364 4gray 4 B000 Tseng ET3000 chipset
= T 132x28 8x13 1056x364 16/256 4 B000 Tseng ET4000 chipset
= T 132x44 . . mono . B000 Cirrus 5320 chipset
= G . . 640x350 256 . . Tecmar VGA/AD
1Bh = T 132x25 9x14 1188x350 16 1 A000 Realtek RTVGA [12]
= G . . 640x400 256 . . Tecmar VGA/AD
1Ch = T 132x25 . . . . . Cirrus 5320 chipset
= T 132x30 9x16 1188x480 16 1 A000 Realtek RTVGA [12]
= G . . 640x480 256 . . Tecmar VGA/AD
1Dh = T 132x43 . . . . . Cirrus 5320 chipset
= T 132x43 9x11 1188x473 16 1 A000 Realtek RTVGA [12]
= G . . 800x600 256 . . Tecmar VGA/AD
1Eh = T 132x44 . . . . . Cirrus 5320 chipset
= T 132x60 9x8 1188x480 16 1 A000 Realtek RTVGA [12]
1Fh = G 100x75 8x8 800x600 16 1 A000 Realtek RTVGA
20h = T 132x25 . . 16 . . Avance Logic AL2101
= G 40x16 . 240x128 mono . B000 HP 95LX/100LX/200LX
= G 120x45 8x16 960x720 16 1 A000 Realtek RTVGA
21h = T 80x25 . . mono . B000 HP 200LX
= T 132x30 . . 16 . . Avance Logic AL2101
= T 132x44 9x9 1188x396 16/256K . B800 WD90C
= T 132x44 9x9 1188x396 16 . B800 Diamond Speedstar 24X
= T 132x60 . . 16 2 B800 Tseng ET4000 chipset [10]
= G 80x43 8x8 720x348 mono . B000 DESQview 2.x+Hercules [4]
= G 128x48 8x16 1024x768 16 1 A000 Realtek RTVGA [12]
22h = T 132x43 . . . . . Allstar Peacock (VGA)
= T 132x43 . . 16 . . Avance Logic AL2101
= T 132x44 8x8 1056x352 . . B800 Tseng Labs EVA
= T 132x44 9x8 1188x352 16/256K 2 B800 Tseng ET3000 chipset
= T 132x44 8x8 1056x352 16/256K 2 B800 Tseng ET4000 chipset
= T 132x44 8x8 1056x352 . . . Ahead Systems EGA2001
= T 132x44 8x8 1056x352 16 2 B800 Ahead B
= T 132x44 8x9 1056x398 16 . . STB Lightspeed ET4000/W32P
= T 132x44 . . 16 . . Orchid Prodesigner VGA
= G 80x43 8x8 720x348 mono . B800 DESQview 2.x+Hercules [4]
= G 96x64 8x16 768x1024 16 1 A000 Realtek RTVGA
23h = T 132x25 6x14 792x350 . . B800 Tseng Labs EVA
= T 132x25 9x14 1188x350 16/256K 4 B800 Tseng ET3000 chipset
= T 132x25 8x14 1056x350 16/256 4 B800 Tseng ET4000 chipset
= T 132x25 8x14 1056x350 . . . Ahead Systems EGA2001
= T 132x25 8x14 1056x350 16 4 B800 Ahead B
= T 132x25 8x8 1056x200 16 . B800 ATI EGA Wonder,ATI VIP
= T 132x25 . . . . . Cirrus 5320 chipset
= T 132x28 . . . . . Allstar Peacock (VGA)
= T 132x28 . . 16 . . Orchid Prodesigner VGA
= T 132x60 . . 16 . . Avance Logic AL2101
= G 128x48 8x16 1024x768 4 1 A000 Realtek RTVGA
24h = T 80x30 . . 16 . . Avance Logic AL2101
= T 132x25 . . . . . Allstar Peacock (VGA)
= T 132x25 . . 16 . . Orchid Prodesigner VGA
= T 132x28 6x13 792x364 . . B800 Tseng Labs EVA
= T 132x28 9x13 1188x364 16/256K 4 B800 Tseng ET3000 chipset
= T 132x28 8x12 1056x336 16 1 B800 Ahead B
= T 132x28 8x13 1056x364 16/256K 4 B800 Tseng ET4000 chipset
= T 132x28 8x14 1056x392 16 . . STB Lightspeed ET4000/W32P
= T 132x28 . . . . . Cirrus 5320 chipset
= G 64x32 8x16 512x512 256 1 A000 Realtek RTVGA
25h = T 80x43 . . 16 . . Avance Logic AL2101
= G 80x60 8x8 640x480 . . A000 Tseng Labs EVA
= G 80x60 8x8 640x480 16/256K 1 A000 Tseng ET3000/4000 chipset
= G . . 640x480 16 . . VEGA VGA
= G 80x60 8x8 640x480 16 . A000 Orchid Prodesigner VGA
= G 80x60 8x8 640x480 16 1 A000 Ahead B (same as 26h)
.NG limit reached, continued in next section...