c_tr.htm

mips架构的bootloader,99左右的版本 但源代码现在没人更新了

<title>The tr Command</title>
<h1>tr</h1>

<!--INDEX "tr command" "transparent mode" -->

The tr command selects transparent mode.<p>

</dl><h2>Format</h2><dl><dd>

The format for this command is:<p>

<pre>
tr [-2] [port]
</pre>

where:<p>

<pre>
	-2 	Selects 2-port mode.
	port	Selects a specific port
</pre>

</dl><h2>Functional Description</h2><dl><dd>

The tr command selects transparent mode. In transparent mode, the <a
href="mondef.htm">Monitor</a> copies any characters typed on the
keyboard to the selected port and then copies characters arriving at
the selected port to the screen.  This command can be used for two
different functions.<p>

<ul>
<li> To allow the user run the <a href="mondef.htm">Monitor</a> on the same serial port that
      is used as a login line to your host. Do this by connnecting tty1
      to your host system, and tty0 to your terminal. Typing 'tr' on
      your terminal will connect you with your host.<p>

<li>     To allow the user to 'rlogin' to another board via a serial port
      or pseudo tty port. This mode is used on the ATMizer platform
      in order to 'talk' to the SAR board. For example,<p>

<pre>
	PMON> tr tty2			connect to port tty2
	SAR> r				display registers on SAR board
	^K				return to main board
	PMON> r				display registers on main board
</pre>

     tty2 is the name of the pseudo tty port (located in shared
     memory) that is used to communicate with the SAR board.<p>

     Note that if you are using 2-port download mode. You will need
     to add the option '-2' to indicate that you need 2-port transparent
     mode. For example,<p>

<pre>
	PMON> tr -2 tty2
</pre>

     In this case the <a href="mondef.htm">Monitor</a> not only copies
     characters typed on the keyboard to tty2 and characters arriving
     on tty2 to the screen. It also copies characters arriving on tty1
     to tty3, and characters arriving on tty3 to tty1.  </ul><p>


The trabort Variable<p>

The environment variable trabort selects the character that terminates
the transparent mode and returns the <a href="mondef.htm">Monitor</a>
to the default command mode.<p>

The hostport Variable<p>

The environment variable hostport determines the default port for the
tr command.<p>

</dl><h2>See Also</h2><dl><dd>
<a href="c_set.htm">set</a>
command for the setup of the environment variables.<p>


</dl><p><hr>
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