GET VERSION

            Function  0400h   returns  the   version  of  DPMI  services
            supported.  Note that this is not necessarily the version of
            any operating  system that supports DPMI.  It should be used
            by programs to determine what calls are legal in the current
            environment.

            To Call

                 AX = 0400h

            Returns

                 AH = Major version
                 AL = Minor version
                 BX = Flags
                      Bit  0   =  1  if  running  under  an  80386  DPMI
                      implementation
                      Bit 1  = 1  if  processor is returned to real mode
                      for reflected  interrupts (as  opposed to  Virtual
                      8086 mode).
                      Bit 2 = 1 if virtual memory is supported
                      Bit 3 is reserved and undefined
                      All other bits are zero and reserved for later use
                 CL = Processor type
                      02 = 80286
                      03 = 80386
                      04 = 80486
                 DH = Current value of virtual master PIC base interrupt
                 DL = Current value of virtual slave PIC base interrupt
                 Carry flag clear (call can not fail)

            Programmer's Notes

                 None