INT 10H 12H BL=34H: Cursor Emulation (Scaling)
Expects: AH 12H
AL setting: 00H enable cursor emulation
01H disable cursor emulation
Returns: AH 12H if a valid value was passed in AL
Info: This updates bit 0 of the EgaMiscInfoRec (at 0040:0087).
When cursor emulation is in effect, the BIOS assumes that input
to INT 10H 01H (set cursor size) is meant to be relative to a
CGA-style 8x8 character matrix and it automatically adjusts
(scales) the input values to match the true character matrix.
See Also: INT 10H 12H (EGA/VGA Special Functions/Alternate Select)
INT 10H: Video Services
EGA/VGA Data Areas