Int 2F Fn DE01  U - Desqview V2.26+ Xdi - Dvxms.dvr - ???                  [Q]

   AX = DE01h
   BX = FFFEh
   CX = 4D47h ("MG")
   DX = 0052h (0,"R")

Return: AL = FFh
   DX = 584Dh