For example, there's a super-important configuration option called mirroring that is controlled by wiring together two pins on the NES cartridge connector. It turns out that nestopia doesn't read iNES headers for some reason.įor disc-based consoles, you can dump a game disc and be sure you have absolutely all the information required to emulate that game, because it's impossible for a disc to contain anything but data.įor older cart-based consoles like the GBA, you can dump a cart and have most of the information you need to emulate that game sometimes there's things in the cart (like a sunlight sensor or EEPROM save storage) that is not strictly speaking part of the data, but usually there's enough clues in the data that the emulator can figure something out.įor even older consoles like the NES, dumping a cart will give you some of the information you need, but absolutely not enough.
You can use ucon64 to scan a ROM to find its internal crc and sha1 checksums. Then it runs on nestopia core, which I think is the most accurate NES emulator on Retroarch, and has the most features, including the ability to auto patch ips. So, all you have to do is create the entry in NstDatabase.xml, which goes in the location where the 'system' directory is configured in Retroarch.Īn example hack, which crashed, and with this section added to the end of the NstDatabase.xml file (before ): It turns out that nestopia doesn't read iNES headers for some reason, but instead requires the NstDatabase.xml to identify certain ROMs, and ROM hacks will be absent from this file. I couldn't figure out why certain ROM hacks kept crashing out with nestopia core on Retroarch.
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