Int 10/AH=12h/BL=F1h

Tseng ET-4000 BIOS - GET/SET SCREEN REFRESH RATE

AH = 12h
BL = F1h
AL = subfunction
00h set refresh rate
01h get refresh rate
BH = video mode
00h  640x480
01h  800x600
02h  1024x768
03h  1280x1024
CX = new refresh rate (see #00035) if AL = 00h

Return:
AL = 12h if supported
CX = current rate (for AL=00h, a changed CX indicates failure)


(Table 00035)
Values for Tseng ET4000 refresh rate:
CX     640x480 800x600   1024x768/1280x1024
00h    60 Hz    56 Hz     interlaced
01h    72 Hz    60 Hz     60 Hz
02h    75 Hz    72 Hz     70 Hz
03h    90 Hz    75 Hz     75 Hz
04h    --       90 Hz     --

Category: Video - Int 10h - T

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