INT 33 - Hewlett Packard - HP MOUSE DRIVER INSTALLATION CHECK AX = 6F00h BX <> 4850h Return: BX = 4850h ('HP') if mouse driver written by Hewlett Packard SeeAlso: INT 10/AX=6F00h,INT 14/AX=6F00h,INT 16/AX=6F00h,INT 17/AX=6F00h