Int 33 Fn 012E  - Ms Mouse V8.10+ - ???                                    [M]

   AX = 012Eh
   BL = ???

Return: AX = 0000h (MS)
   AX = FFFFh (ATI Mouse v7.04)

Note:  not supported by Logitech driver v6.10

See Also: AX=002Eh,AX=022Eh