NAME
    Start -- restart paused I/O over the serial port

FUNCTION
    This function restarts all current I/O on the serial port by
    sending an xON to the "other side", and submitting a "logical
    xON" to "our side", if/when appropriate to current activity.

IO REQUEST
    io_Message      mn_ReplyPort initialized
    io_Device       set by OpenDevice
    io_Unit         set by OpenDevice
    io_Command      CMD_START

RESULTS

SEE ALSO
    serial.device/CMD_STOP