INT 2F U - Quarterdeck RPCI - DVDOS4GX.DVR - ???
        AX = D201h
        BX = 4D45h ("ME")
        CX = 5155h ("QU")
        DX = 5044h ("PD")
Return: AL = FFh
        BX = 4F4Bh ("OK")
Notes:  AH=D2h is the default; use the Quarterdeck installation check described
          under AX=D200h
        called by QEMM 6.03
        performs a variety of actions before setting return registers
SeeAlso: AX=D200h

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