https://wikiti.brandonw.net/index.php?action=history&feed=atom&title=86%3APorts%3A05 2026-05-20T22:46:25Z Revision history for this page on the wiki MediaWiki 1.23.5 https://wikiti.brandonw.net/index.php?title=86:Ports:05&diff=11818&oldid=prev 2021-09-20T09:07:06Z

<p>Fixed an incorrect link</p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr style='vertical-align: top;'> <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 09:07, 20 September 2021</td> </tr><tr><td colspan="2" class="diff-lineno">Line 5:</td> <td colspan="2" class="diff-lineno">Line 5:</td></tr> <tr><td class='diff-marker'>&#160;</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>'''Function:''' Lower Memory Bank Port</div></td><td class='diff-marker'>&#160;</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>'''Function:''' Lower Memory Bank Port</div></td></tr> <tr><td class='diff-marker'>&#160;</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;"></td><td class='diff-marker'>&#160;</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;"></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>This port controls which memory bank is accessible in the 4000-7FFFh range. See [[86<del class="diffchange diffchange-inline">:OS</del>:Memory_Mapping|Memory Mapping]] for the interpretation of the banks &amp; pages.</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>This port controls which memory bank is accessible in the 4000-7FFFh range. See [[86:Memory_Mapping|Memory Mapping]] for the interpretation of the banks &amp; pages.</div></td></tr> <tr><td class='diff-marker'>&#160;</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;"></td><td class='diff-marker'>&#160;</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;"></td></tr> <tr><td class='diff-marker'>&#160;</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>=== Read Values ===</div></td><td class='diff-marker'>&#160;</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>=== Read Values ===</div></td></tr> </table>

Zeroko https://wikiti.brandonw.net/index.php?title=86:Ports:05&diff=11817&oldid=prev 2021-09-20T09:06:38Z

<p>Created page with &quot;<a href="/index.php?title=Category:86:Ports:By_Address" title="Category:86:Ports:By Address">05 - Lower Memory Bank</a> <a href="/index.php?title=Category:86:Ports:By_Name" title="Category:86:Ports:By Name">Lower Memory Bank</a> == Synopsis == &#039;&#039;&#039;Port Number:&#039;&#039;&#039; 05h &#039;&#039;&#039;Function:&#039;&#039;&#039; Lower Memory Ban...&quot;</p> <p><b>New page</b></p><div>[[Category:86:Ports:By_Address|05 - Lower Memory Bank]] [[Category:86:Ports:By_Name|Lower Memory Bank]]<br /> == Synopsis ==<br /> '''Port Number:''' 05h<br /> <br /> '''Function:''' Lower Memory Bank Port<br /> <br /> This port controls which memory bank is accessible in the 4000-7FFFh range. See [[86:OS:Memory_Mapping|Memory Mapping]] for the interpretation of the banks &amp; pages.<br /> <br /> === Read Values ===<br /> * Bit 0-7: Reads last value written.<br /> <br /> === Write Values ===<br /> * Bit 0-5: Page select (external address bits 14-19).<br /> * Bit 6-7: Bank select.<br /> <br /> == Comments ==<br /> * This port is set to 0Dh when the OS passes control to a program.<br /> * Set this port to 0Dh before attempting to call OS functions, because that page contains the public ROM call table. Also be sure to set it to 0Dh before returning to the OS.</div>

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