Int 15H [PS/2] Function C2H (194) Subfunction 03H Set resolution

Sets the resolution of the system's mouse or other pointing device.

Call with:

AH = C2H

AL = 03H

BH = resolution value

00H = 1 count per millimeter

01H = 2 counts per millimeter

02H = 4 counts per millimeter

03H = 8 counts per millimeter

Returns:

If function successful

Carry flag = clear

AH = 00H

If function unsuccessful

Carry flag = set

AH = status (see Int 15H Function C2H Subfunction 00H)

Note:

The default resolution is 4 counts per millimeter after a reset operation (Int 15H Function C2H Subfunction 01H).