INT 33 - MS MOUSE - GET VERSION STRING
        AX = 006Dh
Return: ES:DI -> Microsoft version number of resident driver (see below)
Notes:  also supported by Logitech, Mouse Systems, Kraft, and Genius mouse
          drivers
        the Mouse Systems 7.01 and Genius Mouse 9.06 drivers report their
          Microsoft version as 7.00 even though they do not support any of the
          functions from 0025h through 002Dh supported by the MS 7.00 driver
          (the Genius Mouse driver supports function 0026h, but it differs
          from the Microsoft function)
SeeAlso: AX=004Dh,AX=266Ch

Format of Microsoft version number:
Offset  Size    Description
 00h    BYTE    major version
 01h    BYTE    minor version (BCD)