View source for IO map

== M100/T102/T200 IO Map ==

<table>
<tr><td width="100">IO</td><td>M100</td><td>T200</td></tr>
<tr><td>80h-8Fh</td>
<td>Device-select signal for optional IO controller unit</td>
<td></td>
</tr>
<tr><td>90h-9Fh</td>
<td>Device-select signal for optional answering telephone unit</td>
<td>Real Time Clock</td>
</tr>
<tr><td valign="top">A0h-AFh</td>
<td>Bit 0 - ON/OFF of relay for signal selection of telephone unit<br>
Bit 1 - Generates ENABLE signal of LSI for MODEM</td>
<td></td>
</tr>
<tr><td>B0h-BFh</td>
<td>PIO 81c55</td>
<td>PIO 81c55</td>
</tr>
<tr><td>C0h-CFh</td>
<td>[[Model 100 Serial Interface|DATA input/output of UART]]</td>
<td>[[UART 8251]]</td>
</tr>
<tr><td>D0h-DFh</td>
<td>UART settings</td>
<td>Banks Selection</td>
</tr>
<tr><td>E0h-EFh</td>
<td>Keyboard return</td>
<td>Keyboard return</td>
</tr>
<tr><td>F0h-FDh</td>
<td>LCD</td>
<td></td>
</tr>
<tr><td>FEh</td>
<td>LCD</td>
<td>LCD Command/status</td>
</tr>
<tr><td>FFh</td>
<td>LCD</td>
<td>LCD Data</td>
</tr>
</table>


[[Category:Model T Developer Reference]]