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83:OS:Memory Layout - Revision history
2026-05-19T14:28:58Z
Revision history for this page on the wiki
MediaWiki 1.23.5
https://wikiti.brandonw.net/index.php?title=83:OS:Memory_Layout&diff=3567&oldid=prev
Kalimero: added short description
2005-04-28T20:30:09Z
<p>added short description</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 20:30, 28 April 2005</td>
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<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>[[Category:83:OS Information|Memory Layout]]</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>[[Category:83:OS Information|Memory Layout]]</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>== Memory Layout ==</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>== Memory Layout ==</div></td></tr>
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Kalimero
https://wikiti.brandonw.net/index.php?title=83:OS:Memory_Layout&diff=1279&oldid=prev
Kalimero at 16:21, 13 April 2005
2005-04-13T16:21:07Z
<p></p>
<p><b>New page</b></p><div>[[Category:83:OS Information|Memory Layout]]<br />
== Memory Layout ==<br />
<table border="1" cellspacing="0" cellpadding="2"><br />
<tr><th>Address</th><th>Description</th></tr><br />
<br />
<tr><td>0000-3FFF</td><br />
<td>ROM Page 0</td></tr><br />
<br />
<tr><td>4000-7FFF</td><br />
<td>Swappable ROM/RAM page using [[83:Ports:00]] and [[83:Ports:02]]. There are 16 ROM pages (00-0F) end two RAM pages (00-01)</td></tr><br />
<br />
<tr><td>8000-9326</td><br />
<td>System RAM: Used by the OS to store various pointers, settings, buffers, etc.</td></tr><br />
<br />
<tr><td>[[83:RAM:9327|userMem]]-([[83:RAM:9307|tempMem]]?)</td><br />
<td>User Memory: This is where all variables are stored.</td></tr><br />
<br />
<tr><td>([[83:RAM:9307|tempMem]]?)-([[83:RAM:9309|FPBase]])</td><br />
<td>Temp Memory?: This is where the OS stores [[83:OS:Temporary_Variables|temporary variables]].</td></tr><br />
<br />
<tr><td>([[83:RAM:9309|FPBase]])-([[83:RAM:930B|FPS]])</td><br />
<td>Floating Point Stack: A LIFO stack for [[83:RAM:8039|floating point registers]].</td></tr><br />
<br />
<tr><td>([[83:RAM:930B|FPS]])-([[83:RAM:930D|OPS]])</td><br />
<td>Free RAM.</td></tr><br />
<br />
<tr><td>([[83:RAM:930D|OPS]])-([[83:RAM:930F|OPBase]])</td><br />
<td>Operator Stack: A LIFO stack used to parse expressions and to store return information when a TI-Basic program is called from another TI-Basic program.</td></tr><br />
<br />
<tr><td>([[83:RAM:930F|OPBase]])-([[83:RAM:9317|pTemp]])</td><br />
<td>Variable Allocation Table (VAT) for [[83:OS:Temporary_Variables|temporary variables]].</td></tr><br />
<br />
<tr><td>([[83:RAM:9317|pTemp]])-([[83:RAM:9319|progPtr]])</td><br />
<td>Variable Allocation Table (VAT) for programs and lists with variable length names.</td></tr><br />
<br />
<tr><td>([[83:RAM:9319|progPtr]])-[[83:RAM:FE6E|symTable]]</td><br />
<td>Variable Allocation Table (VAT) for all variables with a fixed name: reals, lists, strings, ans, functions, matrices, window settings, etc.</td></tr><br />
<br />
<tr><td>FE6F-FFFF</td><br />
<td>Hardware Stack</td></tr><br />
</table></div>
Kalimero