https://www.nesdev.org/w/index.php?title=INES_Mapper_056&feed=atom&action=history
INES Mapper 056 - Revision history
2024-03-28T11:23:41Z
Revision history for this page on the wiki
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https://www.nesdev.org/w/index.php?title=INES_Mapper_056&diff=4330&oldid=prev
Lidnariq: /* Bank select ($E000-$EFFF) */ Existing games don't seem to write to R0, but this game does write to R6 and expects no effect
2019-10-02T20:21:37Z
<p><span dir="auto"><span class="autocomment">Bank select ($E000-$EFFF): </span> Existing games don't seem to write to R0, but this game does write to R6 and expects no effect</span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 20:21, 2 October 2019</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> +++- Specify which bank register to update on next write to Bank Data register</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> +++- Specify which bank register to update on next write to Bank Data register</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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><del style="font-weight: bold; text-decoration: none;"> 0: Writes to $F000 have no effect</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 1: Select 8 KB PRG bank at CPU $8000-$9FFF</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 1: Select 8 KB PRG bank at CPU $8000-$9FFF</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 2: Select 8 KB PRG bank at CPU $A000-$BFFF</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 2: Select 8 KB PRG bank at CPU $A000-$BFFF</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 3: Select 8 KB PRG bank at CPU $C000-$DFFF</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 3: Select 8 KB PRG bank at CPU $C000-$DFFF</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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> 4: Writes to $F000 have no effect</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; 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> 4<ins style="font-weight: bold; text-decoration: none;">,6</ins>: Writes to $F000 have no effect</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> 5<del style="font-weight: bold; text-decoration: none;">-</del>7: unknown</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <ins style="font-weight: bold; text-decoration: none;">0,</ins>5<ins style="font-weight: bold; text-decoration: none;">,</ins>7: unknown</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Bank data ($F000-$FFFF) ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Bank data ($F000-$FFFF) ===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Note that this register is logically superimposed on the next thirteen registers.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Note that this register is logically superimposed on the next thirteen registers.</div></td></tr>
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Lidnariq
https://www.nesdev.org/w/index.php?title=INES_Mapper_056&diff=4329&oldid=prev
Lidnariq: /* Registers */ point at iNES Mapper 142 for IRQ behavior, since it's the same IC
2019-09-24T17:22:28Z
<p><span dir="auto"><span class="autocomment">Registers: </span> point at <a href="/wiki/INES_Mapper_142" title="INES Mapper 142">iNES Mapper 142</a> for IRQ behavior, since it's the same IC</span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 17:22, 24 September 2019</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Registers ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Registers ==</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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>=== IRQ <del style="font-weight: bold; text-decoration: none;">Reload value </del>($8000-$<del style="font-weight: bold; text-decoration: none;">BFFF</del>) ===</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; 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>=== IRQ ($8000-$<ins style="font-weight: bold; text-decoration: none;">DFFF</ins>) ===</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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><del style="font-weight: bold; text-decoration: none;">Writes set </del>IRQ <del style="font-weight: bold; text-decoration: none;">reload value, </del>in <del style="font-weight: bold; text-decoration: none;">four four-bit words, same as </del>[[<del style="font-weight: bold; text-decoration: none;">VRC3</del>]]</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; 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><ins style="font-weight: bold; text-decoration: none;">The </ins>IRQ <ins style="font-weight: bold; text-decoration: none;">functionality on this board is implemented by the KS202 ASIC on it. That IC was used in isolation </ins>in [[<ins style="font-weight: bold; text-decoration: none;">iNES Mapper 142</ins>]], and <ins style="font-weight: bold; text-decoration: none;">this mapper</ins>'s IRQ will <ins style="font-weight: bold; text-decoration: none;">behave identically.</ins></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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> </div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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><del style="font-weight: bold; text-decoration: none;">=== IRQ Enable ($C000-$CFFF) ===</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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><del style="font-weight: bold; text-decoration: none;">The only game writes $FF to enable</del>, and <del style="font-weight: bold; text-decoration: none;">$00 to disable. But it</del>'s <del style="font-weight: bold; text-decoration: none;">credible that this register is also like VRC3.</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">=== </del>IRQ <del style="font-weight: bold; text-decoration: none;">Acknowledge ($D000-$DFFF) ===</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">Any write to this register </del>will <del style="font-weight: bold; text-decoration: none;">acknowledge the pending IRQ, like VRC3</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Bank select ($E000-$EFFF) ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Bank select ($E000-$EFFF) ===</div></td></tr>
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Lidnariq
https://www.nesdev.org/w/index.php?title=INES_Mapper_056&diff=4328&oldid=prev
Lidnariq: /* CHR banking control ($FC00-$FFFF) */ incorrect plural
2019-09-24T06:13:21Z
<p><span dir="auto"><span class="autocomment">CHR banking control ($FC00-$FFFF): </span> incorrect plural</span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 06:13, 24 September 2019</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== CHR banking control ($FC00-$FFFF) ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== CHR banking control ($FC00-$FFFF) ===</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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>Note that these registers are superimposed on the Bank data <del style="font-weight: bold; text-decoration: none;">registers</del>.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; 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>Note that these registers are superimposed on the Bank data <ins style="font-weight: bold; text-decoration: none;">register</ins>.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Mask: $FC07</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Mask: $FC07</div></td></tr>
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Lidnariq
https://www.nesdev.org/w/index.php?title=INES_Mapper_056&diff=4327&oldid=prev
Lidnariq: The same ASIC's use on INES Mapper 142 requires that the Bank Select register be at least three bits.
2019-09-24T05:18:24Z
<p>The same ASIC's use on <a href="/wiki/INES_Mapper_142" title="INES Mapper 142">INES Mapper 142</a> requires that the Bank Select register be at least three bits.</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 05:18, 24 September 2019</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l31">Line 31:</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 7 bit 0</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 7 bit 0</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> ---- ----</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> ---- ----</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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> .... .<del style="font-weight: bold; text-decoration: none;">.RR</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; 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> .... .<ins style="font-weight: bold; text-decoration: none;">RRR</ins></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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><del style="font-weight: bold; text-decoration: none;"> </del>||</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; 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><ins style="font-weight: bold; text-decoration: none;"> |</ins>||</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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><del style="font-weight: bold; text-decoration: none;"> </del>++- Specify which bank register to update on next write to Bank Data register</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; 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><ins style="font-weight: bold; text-decoration: none;"> +</ins>++- Specify which bank register to update on next write to Bank Data register</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 0: Writes to $F000 have no effect</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 0: Writes to $F000 have no effect</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 1: Select 8 KB PRG bank at CPU $8000-$9FFF</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 1: Select 8 KB PRG bank at CPU $8000-$9FFF</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 2: Select 8 KB PRG bank at CPU $A000-$BFFF</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 2: Select 8 KB PRG bank at CPU $A000-$BFFF</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 3: Select 8 KB PRG bank at CPU $C000-$DFFF</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> 3: Select 8 KB PRG bank at CPU $C000-$DFFF</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; 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><ins style="font-weight: bold; text-decoration: none;"> 4: Writes to $F000 have no effect</ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"> 5-7: unknown</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Bank data ($F000-$FFFF) ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== Bank data ($F000-$FFFF) ===</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Note that this register is logically superimposed on the next thirteen registers.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Note that this register is logically superimposed on the next thirteen registers.</div></td></tr>
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Lidnariq
https://www.nesdev.org/w/index.php?title=INES_Mapper_056&diff=4326&oldid=prev
Lidnariq: /* CHR banking control ($FC00-$FFFF) */ grammatical agreement
2019-09-24T03:16:45Z
<p><span dir="auto"><span class="autocomment">CHR banking control ($FC00-$FFFF): </span> grammatical agreement</span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 03:16, 24 September 2019</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== CHR banking control ($FC00-$FFFF) ===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>=== CHR banking control ($FC00-$FFFF) ===</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; 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>Note that these registers <del style="font-weight: bold; text-decoration: none;">is </del>superimposed on the Bank data registers.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; 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>Note that these registers <ins style="font-weight: bold; text-decoration: none;">are </ins>superimposed on the Bank data registers.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Mask: $FC07</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Mask: $FC07</div></td></tr>
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Lidnariq
https://www.nesdev.org/w/index.php?title=INES_Mapper_056&diff=4325&oldid=prev
Lidnariq: create from Krzysiobal's reverse-engineering notes.
2019-09-24T03:16:11Z
<p>create from Krzysiobal's reverse-engineering notes.</p>
<p><b>New page</b></p><div>{{DEFAULTSORT:056}}[[Category:Mappers with cycle IRQs]][[Category:iNES Mappers]][[iNES Mapper 056]] reportedly represents a specific unlicensed reproduction of Super Mario Bros. 3<br />
<br />
== Banks ==<br />
* CPU $6000-$7FFF: 8 KB PRG RAM bank (not battery backed!)<br />
* CPU $8000-$9FFF: 8 KB switchable PRG ROM bank<br />
* CPU $A000-$BFFF: 8 KB switchable PRG ROM bank<br />
* CPU $C000-$DFFF: 8 KB switchable PRG ROM bank<br />
* CPU $E000-$FFFF: 8 KB semi-fixed PRG ROM bank (banks 15 or 31)<br />
* PPU $0000-$03FF: 1 KB switchable CHR bank<br />
* PPU $0400-$07FF: 1 KB switchable CHR bank<br />
* PPU $0800-$0BFF: 1 KB switchable CHR bank<br />
* PPU $0C00-$0FFF: 1 KB switchable CHR bank<br />
* PPU $1000-$13FF: 1 KB switchable CHR bank<br />
* PPU $1400-$17FF: 1 KB switchable CHR bank<br />
* PPU $1800-$1BFF: 1 KB switchable CHR bank<br />
* PPU $1C00-$1FFF: 1 KB switchable CHR bank<br />
<br />
== Registers ==<br />
=== IRQ Reload value ($8000-$BFFF) ===<br />
Writes set IRQ reload value, in four four-bit words, same as [[VRC3]]<br />
<br />
=== IRQ Enable ($C000-$CFFF) ===<br />
The only game writes $FF to enable, and $00 to disable. But it's credible that this register is also like VRC3.<br />
<br />
=== IRQ Acknowledge ($D000-$DFFF) ===<br />
Any write to this register will acknowledge the pending IRQ, like VRC3<br />
<br />
=== Bank select ($E000-$EFFF) ===<br />
Select one of three bank registers to update on next write to $F000.<br />
<br />
7 bit 0<br />
---- ----<br />
.... ..RR<br />
||<br />
++- Specify which bank register to update on next write to Bank Data register<br />
0: Writes to $F000 have no effect<br />
1: Select 8 KB PRG bank at CPU $8000-$9FFF<br />
2: Select 8 KB PRG bank at CPU $A000-$BFFF<br />
3: Select 8 KB PRG bank at CPU $C000-$DFFF<br />
=== Bank data ($F000-$FFFF) ===<br />
Note that this register is logically superimposed on the next thirteen registers.<br />
<br />
7 bit 0<br />
---- ----<br />
.... DDDD<br />
||||<br />
++++- New bank value, based on last value written to Bank select register (mentioned above)<br />
<br />
=== PRG bank upper bits ($F000-$F3FF) ===<br />
Note that these registers are superimposed on the Bank data register.<br />
<br />
Mask: $FC03<br />
$F000: [...P ....] - select PRG ROM A17 during reads from $8000-$9FFF<br />
$F001: [...P ....] - same, for reads from $A000-$BFFF<br />
$F002: [...P ....] - same, for reads from $C000-$DFFF<br />
$F003: [...P ....] - same, for reads from $E000-$FFFF<br />
<br />
The game relies on these four registers powering up holding 1.<br />
<br />
The original hardware dummies out the upper three bits, but they could have been connected.<br />
<br />
The above six registers are intended be used together as<br />
LDX #2<br />
STX $E000<br />
LDA bankA000<br />
STA $F001<br />
<br />
=== Mirroring control ($F800-$FBFF) ===<br />
Note that this register is superimposed on the Bank data register.<br />
<br />
Mask: $FC00<br />
$F800: [.... ...M] - 0: H (PPU A11), 1: V (PPU A10)<br />
<br />
=== CHR banking control ($FC00-$FFFF) ===<br />
Note that these registers is superimposed on the Bank data registers.<br />
<br />
Mask: $FC07<br />
$FC00 [.CCCCCCC] - select 1kB CHR for $0000-$03ff<br />
$FC01 [.CCCCCCC] - select 1kB CHR for $0400-$07ff<br />
$FC02 [.CCCCCCC] - select 1kB CHR for $0800-$0bff<br />
$FC03 [.CCCCCCC] - select 1kB CHR for $0c00-$0fff<br />
$FC04 [.CCCCCCC] - select 1kB CHR for $1000-$13ff<br />
$FC05 [.CCCCCCC] - select 1kB CHR for $1400-$17ff<br />
$FC06 [.CCCCCCC] - select 1kB CHR for $1800-$1bff<br />
$FC07 [.CCCCCCC] - select 1kB CHR for $1c00-$1fff<br />
<br />
The original hardware dummies out the top bit, but it could have been connected.<br />
<br />
== See also ==<br />
* [//forums.nesdev.org/viewtopic.php?f=9&t=19314 krzysiobal's reverse-engineering notes]<br />
* [//problemkaputt.de/everynes.htm#mapper56piratesmb3 nocash's documentation]</div>
Lidnariq