 and/or terminal state is updated.
</pre></td></tr><tr><td id="vt100_transform_outbound_char">vt100_transform_outbound_char</td><td><pre> *************************************
 *
 * outgoing data
 *
 *************************************
 -------------------------------------
 given a single char (read from keyboard)
 work out what data should be sent to the remote host.
 input:
 A = keypress
 output:
 Y=0 - no data to be sent (i.e. ignore keypress)
 Y=1 - A contains single byte to send
 Y=2 - 