Function            MGetVerType - get software version and mouse type

  Syntax              unsigned int MGetVerType(void);

  Prototype in        mousehk.h

  Remarks             determines the mouse software version and the mouse
                      type.

                      _mouse1 is the major version number of the mouse
                      software

                      _mouse2 is the minor version number of the mouse
                      software

                      _mouse3 is the type of mouse, where:

                           1 = bus
                           2 = serial
                           3 = InPort
                           4 = PS/2
                           5 = HP

                      _mouse4 is the interrupt request line used by the
                      mouse, where:

                              0 = PS/2
                           2..7 = IRQ2..IRQ7

  Return value        returns the version number in the form major/minor
                      where the high byte is the major version number and
                      the low byte is the minor version number. If an
                      error occurred, 0xFFFF is returned and the mouse
                      variables _mouse# (# = 1 to 4) are all set to 0.

  Note                The global variables _mouse# do NOT return
                      registers on a 1-to-1 basis for this function.
                      Rather, _mouse1/_mouse2 form the BX register and
                      _mouse3/_mouse4 form the CX register.

  Example             see demomous.c