Int 64 Fn FE  - Bw-nfs - Bwrpc - Map EMS Page Frame                        [N]

   AH = FEh
   AL = direction
       00h map in driver's memory block
       01h map out driver's memory block

Return: CF clear if successful
   CF set on error
       AL = error code

Note:  this call is passed through directly to ETHDEV.SYS (see INT 62/AH=FEh)

See Also: INT 21/AH=3Fh"BW-TCP",INT 62/AH=FEh,INT 63"BW-TCP"