Set receive mode

        Entry:
          AH = 20h
          BX = handle
          CX = mode
              01h turn off receiver
              02h receive only packets sent to this interface
              03h mode 2 plus broadcast packets
              04h mode 3 plus limited multicast packets
              05h mode 3 plus all multicast packets
              06h all packets
        Return:
          CF set on error
            DH = error code