Compatibility: VGA
Expects: AH    12H
BL    03H
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)
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INT 10H 12H BL=30H: Select Scan Lines for Text Modes