https://wikiti.brandonw.net/index.php?action=history&feed=atom&title=83%3AOS%3AMemory_Mapping
83:OS:Memory Mapping - Revision history
2026-05-19T14:34:00Z
Revision history for this page on the wiki
MediaWiki 1.23.5
https://wikiti.brandonw.net/index.php?title=83:OS:Memory_Mapping&diff=7941&oldid=prev
Kalimero at 16:18, 12 June 2009
2009-06-12T16:18:19Z
<p></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 16:18, 12 June 2009</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 31:</td>
<td colspan="2" class="diff-lineno">Line 31:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td style="border-left: 1px solid #AAA">ROM0</td></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td style="border-left: 1px solid #AAA">ROM0</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td>SWAP</td></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td>SWAP</td></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><td>ROM1/<del class="diffchange diffchange-inline">8</del></td></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><td>ROM1/<ins class="diffchange diffchange-inline">9</ins></td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td>RAM0</td></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td>RAM0</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div></tr></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div></tr></div></td></tr>
</table>
Kalimero
https://wikiti.brandonw.net/index.php?title=83:OS:Memory_Mapping&diff=3656&oldid=prev
Kalimero: fixed c/p error
2005-04-29T10:34:28Z
<p>fixed c/p error</p>
<table class='diff diff-contentalign-left'>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 10:34, 29 April 2005</td>
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<td colspan="2" class="diff-lineno">Line 92:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div></tr></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div></tr></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><tr></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><tr></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><td>1</td><td>1</td><td>0</td><td><del class="diffchange diffchange-inline">0</del></td></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><td>1</td><td>1</td><td>0</td><td><ins class="diffchange diffchange-inline">1</ins></td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td style="border-left: 1px solid #AAA">ROM0</td></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td style="border-left: 1px solid #AAA">ROM0</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td>RAM0</td></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td>RAM0</td></div></td></tr>
<tr><td colspan="2" class="diff-lineno">Line 99:</td>
<td colspan="2" class="diff-lineno">Line 99:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div></tr></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div></tr></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><tr></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><tr></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><td>1</td><td>1</td><td><del class="diffchange diffchange-inline">0</del></td><td>0</td></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><td>1</td><td>1</td><td><ins class="diffchange diffchange-inline">1</ins></td><td>0</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td style="border-left: 1px solid #AAA">ROM0</td></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td style="border-left: 1px solid #AAA">ROM0</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td>RAM0</td></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td>RAM0</td></div></td></tr>
<tr><td colspan="2" class="diff-lineno">Line 106:</td>
<td colspan="2" class="diff-lineno">Line 106:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div></tr></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div></tr></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><tr></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><tr></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><td>1</td><td>1</td><td><del class="diffchange diffchange-inline">0</del></td><td><del class="diffchange diffchange-inline">0</del></td></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><td>1</td><td>1</td><td><ins class="diffchange diffchange-inline">1</ins></td><td><ins class="diffchange diffchange-inline">1</ins></td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td style="border-left: 1px solid #AAA">ROM0</td></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td style="border-left: 1px solid #AAA">ROM0</td></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td>RAM0</td></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><td>RAM0</td></div></td></tr>
</table>
Kalimero
https://wikiti.brandonw.net/index.php?title=83:OS:Memory_Mapping&diff=1288&oldid=prev
Kalimero at 20:26, 28 April 2005
2005-04-28T20:26:21Z
<p></p>
<p><b>New page</b></p><div>[[Category:83:OS Information|Memory Mapping]]<br />
== Memory Mapping ==<br />
Memory on the TI83 has been split up in 16Kb pages. The 256Kb of ROM has been split up in 16 such pages. The 32Kb of RAM have been split up in 2 pages.<br />
<br />
The following table describes how these pages are mapped to the 16 bit address space of the z80 depending on the value of various I/O ports.<br />
<br />
<table width="100%" border="0" cellspacing="0" cellpadding="2" style="border: 1px solid #AAA; text-align: center"><br />
<tr><br />
<th width="10%">[[83:Ports:04|Port 04]] bit 0</th><br />
<th width="10%">[[83:Ports:02|Port 02]] bit 6</th><br />
<th width="10%">[[83:Ports:02|Port 02]] bit 7</th><br />
<th width="10%">[[83:Ports:02|Port 02]] bit 3</th><br />
<th width="15%" style="border-left: 1px solid #AAA">0x0000</th><br />
<th width="15%">0x4000</th><br />
<th width="15%">0x8000</th><br />
<th width="15%">0xC000</th><br />
</tr><br />
<br />
<tr><br />
<td style="border-top: 1px solid #AAA">0</td><br />
<td style="border-top: 1px solid #AAA">*</td><br />
<td style="border-top: 1px solid #AAA">0</td><br />
<td style="border-top: 1px solid #AAA">0</td><br />
<td style="border-top: 1px solid #AAA; border-left: 1px solid #AAA">ROM0</td><br />
<td style="border-top: 1px solid #AAA">SWAP</td><br />
<td style="border-top: 1px solid #AAA">ROM0/8</td><br />
<td style="border-top: 1px solid #AAA">RAM0</td><br />
</tr><br />
<tr><br />
<td>0</td><td>*</td><td>0</td><td>1</td><br />
<td style="border-left: 1px solid #AAA">ROM0</td><br />
<td>SWAP</td><br />
<td>ROM1/8</td><br />
<td>RAM0</td><br />
</tr><br />
<tr><br />
<td>0</td><td>*</td><td>1</td><td>0</td><br />
<td style="border-left: 1px solid #AAA">ROM0</td><br />
<td>SWAP</td><br />
<td>RAM0</td><br />
<td>RAM0</td><br />
</tr><br />
<tr><br />
<td>''0''</td><td>''*''</td><td>''1''</td><td>''1''</td><br />
<td style="border-left: 1px solid #AAA">''ROM0''</td><br />
<td>''SWAP''</td><br />
<td>''RAM1''</td><br />
<td>''RAM0''</td><br />
</tr><br />
<br />
<tr><br />
<td style="border-top: 1px solid #AAA">1</td><br />
<td style="border-top: 1px solid #AAA">0</td><br />
<td style="border-top: 1px solid #AAA">0</td><br />
<td style="border-top: 1px solid #AAA">0</td><br />
<td style="border-top: 1px solid #AAA; border-left: 1px solid #AAA">ROM0</td><br />
<td style="border-top: 1px solid #AAA">ROM0/8</td><br />
<td style="border-top: 1px solid #AAA">SWAP</td><br />
<td style="border-top: 1px solid #AAA">ROM0/8</td><br />
</tr><br />
<tr><br />
<td>1</td><td>0</td><td>0</td><td>1</td><br />
<td style="border-left: 1px solid #AAA">ROM0</td><br />
<td>ROM0/8</td><br />
<td>SWAP</td><br />
<td>ROM1/9</td><br />
</tr><br />
<tr><br />
<td>1</td><td>0</td><td>1</td><td>0</td><br />
<td style="border-left: 1px solid #AAA">ROM0</td><br />
<td>ROM0/8</td><br />
<td>SWAP</td><br />
<td>RAM0</td><br />
</tr><br />
<tr><br />
<td>1</td><td>0</td><td>1</td><td>1</td><br />
<td style="border-left: 1px solid #AAA">ROM0</td><br />
<td>ROM0/8</td><br />
<td>SWAP</td><br />
<td>RAM1</td><br />
</tr><br />
<br />
<tr><br />
<td style="border-top: 1px solid #AAA">1</td><br />
<td style="border-top: 1px solid #AAA">1</td><br />
<td style="border-top: 1px solid #AAA">0</td><br />
<td style="border-top: 1px solid #AAA">0</td><br />
<td style="border-top: 1px solid #AAA; border-left: 1px solid #AAA">ROM0</td><br />
<td style="border-top: 1px solid #AAA">RAM0</td><br />
<td style="border-top: 1px solid #AAA">RAM1</td><br />
<td style="border-top: 1px solid #AAA">ROM0/8</td><br />
</tr><br />
<tr><br />
<td>1</td><td>1</td><td>0</td><td>0</td><br />
<td style="border-left: 1px solid #AAA">ROM0</td><br />
<td>RAM0</td><br />
<td>RAM1</td><br />
<td>ROM1/9</td><br />
</tr><br />
<tr><br />
<td>1</td><td>1</td><td>0</td><td>0</td><br />
<td style="border-left: 1px solid #AAA">ROM0</td><br />
<td>RAM0</td><br />
<td>RAM1</td><br />
<td>RAM0</td><br />
</tr><br />
<tr><br />
<td>1</td><td>1</td><td>0</td><td>0</td><br />
<td style="border-left: 1px solid #AAA">ROM0</td><br />
<td>RAM0</td><br />
<td>RAM1</td><br />
<td>RAM1</td><br />
</tr><br />
</table><br />
<br />
*RAMx = RAM Page x<br />
*ROMx = ROM Page x<br />
*ROMx/y = ROM Page x or y depending on [[83:Ports:00|bit 4 of port 00]].<br />
*SWAP = Page swappable through [[83:Ports:02|port 02 bits 0, 1, 2 and 6]] and [[83:Ports:00|port 00 bit 4]].<br />
<br />
The line in italics is the [[83:OS:Memory Layout|default mode]].</div>
Kalimero