Int 2F Fn FE00  - Pc-nfs ??? - Installation Check                          [N]

   AX = FE00h
   BX = 4454h ("DT")
   CX = 4B52h ("KR")
   DX = 544Dh ("TM")

Return: AL = FFh if installed
      BX = 5254h ("RT")
      CX = 4D44h ("MD")
      DX = 544Bh ("TK")

Note:  DV/X 1.10 DVPCNFS.DVR searches AH=FEh,FFh,C0h-FDh for a valid response

See Also: AX=FE08h