INT 15 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - GET/SET SCALING FACTOR
AX = C206h
BH = subfunction
00h return device status
Return: BL = status
bit 0: right button pressed
bit 1: reserved
bit 2: left button pressed
bit 3: reserved
bit 4: 0 if 1:1 scaling, 1 if 2:1 scaling
bit 5: device enabled
bit 6: 0 if stream mode, 1 if remote mode
bit 7: reserved
CL = resolution (see AX=C203h)
DL = sample rate, reports per second
01h set scaling at 1:1
02h set scaling at 2:1
Return: CF set on error
AH = status (see AX=C200h)


15C206 - SYSTEM - POINTING DEVICE BIOS INTERFACE (PS) - GET/SET SCALING FACTOR