README: sample-ninebit

This is a simple example demonstrating use of a SeaCOM device for Asynchronous
communications using native 9-bit framesize support.  This sample consists of
two applications: a sender and a receiver.  The applications expect to be given
the device ids of two SeaCOM serial ports (16c950s) connected together by 
a null modem.  The application also requires a patched version of the 8250
Linux driver which adds 9-bit communications support.

The receive application should be started before the send application.  The
first argument for each sample is the SeaCOM serial port desired to preform
the operations on.  The send application can optionally take two more arguments:
message size and number of iterations.

$ receive-async /dev/ttyS1
$ send-async /dev/ttyS0 8 5

All received data is captured to the file "data" in the directory from which
the receive application is run.  The message(s) sent by the send application
consist of the specified number of data bytes cycling from 0 to 255.

Note:  Because this application uses the standard N_TTY line discipline received
data may be returned to the user in chunks.
