Int 15H [PS/2] Function C2H (194) Subfunction 04H Get pointing device type

Returns the identification code for the system's mouse or other pointing device.

Call with:

AH = C2H

AL = 04H

Returns:

If function successful

Carry flag = clear

AH = 00H

BH = device ID

If function unsuccessful

Carry flag = set

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