https://sneslab.net/mw/index.php?title=LC_LZ2&feed=atom&action=history
LC LZ2 - Revision history
2024-03-29T08:18:51Z
Revision history for this page on the wiki
MediaWiki 1.39.5
https://sneslab.net/mw/index.php?title=LC_LZ2&diff=2316&oldid=prev
MarioFanGamer: Added category.
2023-03-24T19:50:21Z
<p>Added category.</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 19:50, 24 March 2023</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>[https://fusoya.eludevisibility.org/lc/index.html Lunar Compress], a library by [[FuSoYa]] made to handle loading various game graphics format, including LZ2.</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>[https://fusoya.eludevisibility.org/lc/index.html Lunar Compress], a library by [[FuSoYa]] made to handle loading various game graphics format, including LZ2.</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;"></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;">[[Category:Compression Formats]]</ins></div></td></tr>
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MarioFanGamer
https://sneslab.net/mw/index.php?title=LC_LZ2&diff=2088&oldid=prev
Alcaro: lunar compress says zelda uses lz1, not lz2
2021-10-07T15:39:09Z
<p>lunar compress says zelda uses lz1, not lz2</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:39, 7 October 2021</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td>
<td colspan="2" class="diff-lineno">Line 1:</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>{{DISPLAYTITLE:LC_LZ2}}</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>{{DISPLAYTITLE:LC_LZ2}}</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>LZ2 or LC_LZ2, as named by [[Lunar Compress]], is a lossless data compression format, used by [[Super Mario World]] to compress graphics. It is also used by <del style="font-weight: bold; text-decoration: none;">[[A Link to the Past]] and </del>[[Super Mario World 2: Yoshi's Island]].</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>LZ2 or LC_LZ2, as named by [[Lunar Compress]], is a lossless data compression format, used by [[Super Mario World]] to compress graphics. It is also used by [[Super Mario World 2: Yoshi's Island]].</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>== Compression ==</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>== Compression ==</div></td></tr>
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Alcaro
https://sneslab.net/mw/index.php?title=LC_LZ2&diff=2087&oldid=prev
Alcaro at 15:20, 7 October 2021
2021-10-07T15:20:51Z
<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:20, 7 October 2021</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> increased by 1 after each write</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> increased by 1 after each write</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>100 "Repeat"</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>100 "Repeat"</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> Followed by two bytes (<del style="font-weight: bold; text-decoration: none;">ABCD </del>byte order) containing address (in the</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> Followed by two bytes (<ins style="font-weight: bold; text-decoration: none;">big endian </ins>byte order) containing address (in the</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> output buffer) to copy (L+1) bytes from</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> output buffer) to copy (L+1) bytes from</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>101 (Unused command)</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>101 (Unused command)</div></td></tr>
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Alcaro
https://sneslab.net/mw/index.php?title=LC_LZ2&diff=2086&oldid=prev
Vawlpe: Undo change about Long header ot using L+1, seems to have been an inaccuracy from smwiki
2021-10-07T15:06:56Z
<p>Undo change about Long header ot using L+1, seems to have been an inaccuracy from smwiki</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:06, 7 October 2021</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l40">Line 40:</td>
<td colspan="2" class="diff-lineno">Line 40:</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> CCC: Real command</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> CCC: Real command</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> LLLLLLLLLL: Length</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> LLLLLLLLLL: Length</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;"> Of note: In long commands, anything that says (L+1) earlier is just L, you don't add 1.</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></pre></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></pre></div></td></tr>
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Vawlpe
https://sneslab.net/mw/index.php?title=LC_LZ2&diff=2085&oldid=prev
Vawlpe: Long commands dont add +1 to the length
2021-10-07T14:41:26Z
<p>Long commands dont add +1 to the length</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 14:41, 7 October 2021</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> CCC: Real command</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> CCC: Real command</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> LLLLLLLLLL: Length</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> LLLLLLLLLL: Length</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;"> Of note: In long commands, anything that says (L+1) earlier is just L, you don't add 1.</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></pre></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></pre></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>
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Vawlpe
https://sneslab.net/mw/index.php?title=LC_LZ2&diff=1242&oldid=prev
Alcaro: fix mediawiki page title cleverness
2020-08-19T17:39:45Z
<p>fix mediawiki page title cleverness</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 17:39, 19 August 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1">Line 1:</td>
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<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;">{{DISPLAYTITLE:LC_LZ2}}</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>LZ2 or LC_LZ2, as named by [[Lunar Compress]], is a lossless data compression format, used by [[Super Mario World]] to compress graphics. It is also used by [[A Link to the Past]] and [[Super Mario World 2: Yoshi's Island]].</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>LZ2 or LC_LZ2, as named by [[Lunar Compress]], is a lossless data compression format, used by [[Super Mario World]] to compress graphics. It is also used by [[A Link to the Past]] and [[Super Mario World 2: Yoshi's Island]].</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>
</table>
Alcaro
https://sneslab.net/mw/index.php?title=LC_LZ2&diff=1240&oldid=prev
Alcaro: Alcaro moved page LZ2 to LC LZ2: avoid confusion with https://en.wikipedia.org/wiki/LZ4_(compression_algorithm)
2020-08-19T17:39:08Z
<p>Alcaro moved page <a href="/wiki/LZ2" class="mw-redirect" title="LZ2">LZ2</a> to <a href="/wiki/LC_LZ2" title="LC LZ2">LC LZ2</a>: avoid confusion with https://en.wikipedia.org/wiki/LZ4_(compression_algorithm)</p>
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<td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 17:39, 19 August 2020</td>
</tr><tr><td colspan="2" class="diff-notice" lang="en"><div class="mw-diff-empty">(No difference)</div>
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Alcaro
https://sneslab.net/mw/index.php?title=LC_LZ2&diff=782&oldid=prev
Vitor Vilela: Recovered from SMWiki, improvements are welcome.
2019-11-09T23:20:57Z
<p>Recovered from SMWiki, improvements are welcome.</p>
<p><b>New page</b></p><div>LZ2 or LC_LZ2, as named by [[Lunar Compress]], is a lossless data compression format, used by [[Super Mario World]] to compress graphics. It is also used by [[A Link to the Past]] and [[Super Mario World 2: Yoshi's Island]].<br />
<br />
== Compression ==<br />
<br />
The compressed data consists of "chunks", each with a header:<br />
<br />
<pre><br />
bits<br />
76543210<br />
CCCLLLLL<br />
<br />
CCC: Command bits<br />
LLLLL: Length<br />
</pre><br />
<br />
If the header byte is $FF, the end of the compressed data has been reached, and decompression will be aborted.<br />
<br />
Here is a list of commands bits which the LC_LZ2 decompression function can use during the decompression:<br />
<br />
<pre><br />
000 "Direct Copy"<br />
Followed by (L+1) bytes of data<br />
001 "Byte Fill"<br />
Followed by one byte to be repeated (L+1) times<br />
010 "Word Fill"<br />
Followed by two bytes. Output first byte, then second, then first,<br />
then second, etc. until (L+1) bytes has been outputted<br />
011 "Increasing Fill"<br />
Followed by one byte to be repeated (L+1) times, but the byte is<br />
increased by 1 after each write<br />
100 "Repeat"<br />
Followed by two bytes (ABCD byte order) containing address (in the<br />
output buffer) to copy (L+1) bytes from<br />
101 (Unused command)<br />
110 (Unused command)<br />
111 "Long length"<br />
This command has got a two-byte header:<br />
111CCCLL LLLLLLLL<br />
CCC: Real command<br />
LLLLLLLLLL: Length<br />
</pre><br />
<br />
== Decompression ==<br />
<br />
During the decompression, the decompressed chunks are outputted into a buffer which is either RAM or SRAM. SMW uses the RAM address $7E:AD00 as its decompression buffer.<br />
<br />
== Usage ==<br />
<br />
You can use the LC_LZ2 compression to mainly compress graphics. Technically you can compress anything with this format, but graphics is preferred due to their big size. Seeing the SNES isn't fast, the decompression takes a while to finish, so whenever you overuse the compression the loading time will increase.<br />
<br />
== Other ==<br />
<br />
You can see an LC_LZ2 decompression routine setup at SNES $00:B888. The decompression routine itself is located at SNES $00:B8DE.<br />
<br />
== External links ==<br />
<br />
[https://fusoya.eludevisibility.org/lc/index.html Lunar Compress], a library by [[FuSoYa]] made to handle loading various game graphics format, including LZ2.</div>
Vitor Vilela