NAME
        PRD_RAWWRITE -- transparent write command

   FUNCTION
        This is a non standard write command that performs no
        processing on the data passed to it.

   IO REQUEST
        io_Message      mn_ReplyPort set if quick I/O is not possible
        io_Command      PRD_RAWWRITE
        io_Flags        IOB_QUICK set if quick I/O is possible
        io_Length       the number of bytes in io_Data
        io_Data         the raw bytes to write to the printer