Int 21 Fn FD  - Dos V2.11-2.13 - Oem Function                              [D]

   AH = FDh

Return: AL = 00h if no OEM function handler installed (see AH=F8h"OEM")

See Also: AH=F8h"OEM",AH=FCh"OEM",AH=FEh"OEM"