Quirks of nes.hexpat with famiclones and miscellaneous fixes #467
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Add many changes to nes.hexpat
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C3pa
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Dec 17, 2025
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These changes look unrelated.
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Yes, I also fixed a bug with the PE pattern that I didn't notice until after the previous pull request was already merged, sorry. Forgot to mention it.
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Miscellaneous ROMs were added (any ROM after the machine code and misc. data; most famous ones are the PlayChoice-10 ROMs).
One of them was found in a file with the PRG ROM (machine code) bigger than the size that the format can normally store. I tried as much as I could to stick to how the NES 2.0 extension handles that and got very close, but was ultimately not able to do it. I included a hacked together approach that works.
Mappers 83 to 92 were added, as well as 256 (VTxx famiclones), 426 (VT369 ones with a misc. ROM), 424 (variant with the aforementioned large PRG ROM), 355 (has the third misc. ROM), 594 (historically significant due to the recent talks about its console Rinco Talkman), 187 (seemingly the basis for it) and 595 (the only other mapper with a similar number).
Proper labels were added for some mapper names missing them, and so were mapper designations 0 and 1. Mapper 51's submapper was also added.
There's various fixes of odd indenting and coding as well.