INT 10H 12H BL=30H: Select Scan Lines for Text Modes
Expects: AH 12H
AL scan-lines code: 00H = 200 scan lines (EGA/VGA)
01H = 350 scan lines (EGA/VGA)
02H = 400 scan lines (VGA only)
Returns: AH 12H if a VGA is active
Info: This updates bits 0-3 in the EgaMiscInfo2Rec (at 0040:0088) and
bits 4 and 7 of the VgaFlagsRec (at 0040:0089).
Then, on the next INT 10H 00H call to switch to a text mode, the
specified resolution will be in effect.
See Also: INT 10H 12H (EGA/VGA Special Functions/Alternate Select)
INT 10H: Video Services
EGA/VGA Data Areas