Int 33 Fn 0048  - Mouse Systems Mouse Driver V7.01+ - Get ???              [M]

   AX = 0048h
   BX = CDEFh

Return: CX = ???
   BH = ???
   BL = ??? (if 50h, driver is using PS/2 pointing device BIOS interface)

Note:  also supported by Genius Mouse 9.06 driver