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  <title>TI-73 Link Protocol Guide - OS &amp; BIOS version</title>
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<b>TI-73 Link Protocol Guide</b> - Getting OS &amp; BIOS version
<center>
<h2>
<hr align="center">OS &amp; BIOS version</h2>
</center>
<p><br>
With the introduction of the Ti-Connect software, Texas Instruments
have incorporated a new command which returns some version
informations. </p>
<p> </p>
<h4> </h4>
<p> </p>
<h4> <a name="rts"></a>Getting OS &amp; BIOS version</h4>
Indeed, the request is like sending a TI84+ FLASH.
<p>The protocol for silently receiving the clock is shown below:
<table nosave="" bgcolor="#ffffff" border="1" cellspacing="0"
 width="92%">
  <tbody>
    <tr>
      <th bgcolor="#008800" width="7%"><font color="#ffffff">Step</font></th>
      <th colspan="3" bgcolor="#008800"><font color="#ffffff">Direction</font></th>
      <th bgcolor="#008800" width="80%"><font color="#ffffff">Packet</font></th>
    </tr>
    <tr nosave="">
      <td bgcolor="#ffffff" width="7%">
      <center>1&nbsp;</center>
      </td>
      <td rowspan="6" nosave="">
      <center><img src="graphics/comp.gif" alt="Computer" align="bottom"
 border="0" height="33" width="30"> </center>
      </td>
      <td bgcolor="#ffffff">
      <center><img src="graphics/right.gif" alt="===&gt;" align="bottom"
 border="0" height="13" width="22"> </center>
      </td>
      <td rowspan="6" nosave="">
      <center><img src="graphics/calc.gif" alt="Calculator"
 align="bottom" border="0" height="35" width="60"> </center>
      </td>
      <td bgcolor="#ffffff" width="80%">VER<br>
      </td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="7%">
      <center>2&nbsp;</center>
      </td>
      <td bgcolor="#ffffff">
      <center><img src="graphics/left.gif" alt="&lt;===" align="bottom"
 border="0" height="13" width="22"> </center>
      </td>
      <td bgcolor="#ffffff" width="80%">ACK</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="7%">
      <center>3&nbsp;</center>
      </td>
      <td bgcolor="#ffffff">
      <center>
      <center><img src="graphics/right.gif" alt="===&gt;" align="bottom"
 border="0" height="13" width="22"> </center>
      </center>
      </td>
      <td bgcolor="#ffffff" width="80%">CTS</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="7%">
      <center>4&nbsp;</center>
      </td>
      <td bgcolor="#ffffff">
      <center>
      <center><img src="graphics/left.gif" alt="&lt;===" align="bottom"
 border="0" height="13" width="22"> </center>
      </center>
      </td>
      <td bgcolor="#ffffff" width="80%">ACK</td>
    </tr>
    <tr>
      <td width="7%">
      <center>5&nbsp;</center>
      </td>
      <td>
      <center>
      <center>
      <center><img src="graphics/left.gif" alt="&lt;===" align="bottom"
 border="0" height="13" width="22"> </center>
      </center>
      </center>
      </td>
      <td width="80%">DATA<br>
      </td>
    </tr>
    <tr>
      <td width="7%">
      <center>6&nbsp;</center>
      </td>
      <td>
      <center>
      <center>
      <center><img src="graphics/right.gif" alt="===&gt;" align="bottom"
 border="0" height="13" width="22"> </center>
      </center>
      </center>
      </td>
      <td width="80%">ACK</td>
    </tr>
  </tbody>
</table>
</p>
<p></p>
<p><u>Example (PC requesting version):</u>
<table nosave="" border="0" cellspacing="0" width="100%">
  <tbody>
    <tr bgcolor="#ffcccc">
      <td bgcolor="#ccffcc">PC:</td>
      <td bgcolor="#ccffcc" width="50%"><tt><b>07 2D 00 00</b></tt></td>
      <td bgcolor="#ccffcc" width="50%"><i>Request informations</i></td>
    </tr>
    <tr bgcolor="#ffcccc">
      <td bgcolor="#ffcccc">TI:</td>
      <td bgcolor="#ffcccc" width="50%"><b><tt>74 56 00 00</tt></b></td>
      <td bgcolor="#ffcccc" width="50%"><i>Acknowledgement of REQ</i></td>
    </tr>
    <tr bgcolor="#ffcccc">
      <td bgcolor="#ccffcc">PC:</td>
      <td bgcolor="#ccffcc" width="50%"><b><tt>07 09 00 00</tt></b></td>
      <td bgcolor="#ccffcc" width="50%"><i>Clear to send variable</i></td>
    </tr>
    <tr bgcolor="#ffcccc">
      <td bgcolor="#ffcccc">TI:</td>
      <td bgcolor="#ffcccc" width="50%"><b><tt>74 56 00 00</tt></b></td>
      <td bgcolor="#ffcccc" width="50%"><i>Acknowledgement of CTS</i></td>
    </tr>
    <tr bgcolor="#ffcccc">
      <td bgcolor="#ffcccc" height="44">&nbsp;</td>
      <td bgcolor="#ffcccc" height="44" width="50%"><tt><b>74 15 0B 00 </b>01
60 01 00 00 00 09 01 42 52 00 <b>01 00</b></tt></td>
      <td bgcolor="#ffcccc" height="44" width="50%"><i>Variable data:
12 bytes
(OS: 1.60, BIOS: 1.00)</i></td>
    </tr>
    <tr bgcolor="#ffcccc">
      <td bgcolor="#ccffcc">PC:</td>
      <td bgcolor="#ccffcc" width="50%"><b><tt>07 56 00 00</tt></b></td>
      <td bgcolor="#ccffcc" width="50%"><i>Acknowledgement of variable
data</i></td>
    </tr>
  </tbody>
</table>
</p>
<p></p>
<h4> </h4>
<p>The variable data has the following format (pure binary and/or BCD):
<table border="1" cellspacing="0" width="92%">
  <tbody>
    <tr>
      <th bgcolor="#dddddd" width="7%">Offset</th>
      <th bgcolor="#dddddd" width="8%">Length</th>
      <th bgcolor="#dddddd" width="85%">Description</th>
    </tr>
    <tr>
      <td width="7%">0</td>
      <td width="8%">2 bytes</td>
      <td width="85%">OS version like 01 60 for 1.60<br>
      </td>
    </tr>
    <tr>
      <td width="7%">4</td>
      <td width="8%">2&nbsp;bytes</td>
      <td width="85%">BIOS version like 01 00 for 1.00</td>
    </tr>
    <tr>
      <td width="7%">6<br>
      </td>
      <td width="8%">1 byte</td>
      <td width="85%">Battery level (00 = good, 01 = low)<br>
      </td>
    </tr>
    <tr>
      <td style="vertical-align: top;">7<br>
      </td>
      <td style="vertical-align: top;">1 byte<br>
      </td>
      <td style="vertical-align: top;">??<br>
      </td>
    </tr>
    <tr>
      <td valign="top">8<br>
      </td>
      <td valign="top">2 bytes<br>
      </td>
      <td valign="top">Always 09 01<br>
      </td>
    </tr>
    <tr>
      <td valign="top">10<br>
      </td>
      <td valign="top">2 bytes<br>
      </td>
      <td valign="top">?? <br>
      </td>
    </tr>
    <tr>
      <td valign="top">12<br>
      </td>
      <td valign="top">1 byte<br>
      </td>
      <td valign="top">Always 00 </td>
    </tr>
  </tbody>
</table>
</p>
<p></p>
<p></p>
<h4><span style="font-weight: normal;">Note : when calculator is
waiting for OS arrival, any packet is rejected unless this one. But, it
returns 0.00 as OS version.<br>
Note : this packet seems to the same as TI8X+ hand-helds.</span></h4>
Examples :<br>
<small><span style="font-family: courier;">TI73&nbsp; : </span></small><tt>01
60 01 00 00 00 09 01 42 52 00</tt><small><span
 style="font-family: courier;"></span></small><br>
<small><span style="font-family: courier;">TI84+ : 02 16 01 00
00 03 09 01 00 00 00 00</span><br style="font-family: courier;">
</small><span style="font-family: courier;"><small>TI83+ : 01 0C 01 00
00 00 09 01 00 00 00 18 (VTi5b1)<br>
<br>
</small></span>
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<hr align="center"><i>Site maintained by Romain Li&eacute;vin (<a
 href="mailto:roms@lpg.ticalc.org">roms@lpg.ticalc.org</a>) and Tim
Singer
(<a href="mailto:tsinger@gladstone.uoregon.edu">tsinger@gladstone.uoregon.edu</a>)</i>
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