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https://github.com/holub/mame
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30 lines
1.4 KiB
ReStructuredText
30 lines
1.4 KiB
ReStructuredText
MAME Path Handling
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MAME has a specific order it uses when checking for user files such as ROM sets and cheat files.
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Order of Path Loading
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Let's use an example of the cheat file for AfterBurner 2 for Sega Genesis/MegaDrive (aburner2 in the megadrive softlist), and your cheatpath is set to "cheat" (as per the default) -- this is how MAME will search for that cheat file:
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1. cheat/megadriv/aburner2.xml
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2. cheat/megadriv.zip -> aburner2.xml
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Notice that it checks for a .ZIP file first before a .7Z file.
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3. cheat/megadriv.zip -> <arbitrary path>/aburner2.xml
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It will look for the first (if any) aburner2.xml file it can find inside that zip, no matter what the path is.
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4. cheat.zip -> megadriv/aburner2.xml
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Now it is specifically looking for the file and folder combination, but inside the cheat.zip file.
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5. cheat.zip -> <arbitrary path>/megadriv/aburner2.xml
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Like before, except looking for the first (if any) aburner2.xml inside a megadriv folder inside the zip.
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6. cheat/megadriv.7z -> aburner2.xml
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Now we start checking 7ZIP files.
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7. cheat/megadriv.7z -> <arbitrary path>/aburner2.xml
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8. cheat.7z -> megadriv/aburner2.xml
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9. cheat.7z -> <arbitrary path>/megadriv/aburner2.xml
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Similar to zip, except now 7ZIP files.
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[todo: ROM set loading is slightly more complicated, adding CRC. Get that documented in the next day or two.]
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