Category: <b>video</b>
<p>
<pre><b>INT 10 - VIDEO - SET VIDEO MODE</b>

	AH = 00h
	AL = desired video mode (see <a href=../../it/10/0.html>#00010</a>)
Return: AL = video mode flag (Phoenix, AMI BIOS)
	    20h mode &gt; 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
InstallCheck: for Ahead adapters, the signature "AHEAD" at C000h:0025h
	for Paradise adapters, the signature "VGA=" at C000h:007Dh
	for Oak Tech OTI-037/057/067/077 chipsets, the signature "OAK VGA" at
	  C000h:0008h
	for ATI adapters, 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 <a href=../../it/32/7.html>#00732</a>)
	  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 &gt; 30h (see <a href=../../it/09/0.html>#00009</a>)
	for Genoa video adapters, 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 Genoa SuperEGA BIOS v3.0+, C000h:0070h contains the signature
	    "EXTMODE", indicating support for extended modes
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.
	intercepted by GRAFTABL from Novell DOS 7 and Caldera OpenDOS 7.01.
SeeAlso: AX=0070h,AX=007Eh,AX=10E0h,AX=10F0h,AH=40h,AX=6F05h,AH=FFh"GO32"
SeeAlso: 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

</pre>