INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - SET RESOLUTION
AX = C203h
BH = resolution
00h one count per mm
01h two counts per mm
02h four counts per mm
03h eight counts per mm
Return: CF set on error
AH = status (see AX=C200h)


15C203 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - SET RESOLUTION