NAME
    Reset -- reinitializes the serial port

FUNCTION
    This command resets the serial port to its freshly initialized
    condition. It aborts all I/O requests both queued and current,
    relinquishes the current buffer, obtains a new default sized
    buffer, and sets the port's flags and parameters to their
    boot-up time default values. The functions places the reset
    parameter values in the ioRequest block.

IO REQUEST
    io_Message      mn_ReplyPort initialized
    io_Device       set by opendevice
    io_Unit         set by opendevice
    io_Command      CMD_RESET

RESULTS
    Error -- if the Reset succeded, then Error will be null.
             If the Reset failed, then the Error will be non-zero.