Int 2F Fn F800  U - Superstor Pro 2xon.com - Installation Check            [d]

   AX = F800h
   CX = 4455h ("DU")
   DL = 45h ("E")

Return: AL = FFh if installed
       ES:BX -> ASCII signature "Universal Data Exchange"
Program: SuperStor is a disk-compression program by Addstor.

Note:  returns AX=0001h if AL is not 00h or 01h

See Also: AX=1001h,AX=F801h