Dumping 64 in 1 by Dynavision

[Blunern]

Hello Bootleg Games Community, I have a bootleg cartridge named 64 in 1 by Dynavision, and I want to dump it using the Sanni Cart Reader V5 Retro Game Card Dumper, but no mapper seems to be able to do the work correctly. I'd love it if you could help me or guide me on how to learn to dump bootleg cartridges like this one using this tool. I'll attach a photo of the PCB in case it's of any help. Thanks in advance for the help

[NewRisingSun]

Dump as NROM please and post it, so one can analyze the dump to determine the mapper. Glob-top PCB pictures alone won't tell us much, unfortunately.

[Blunern]

 Thanks for the answer. How do I dump a NROM with the Sanni Cart Reader V5 Retro Game Card Dumper (OSCR)?
I dumped an iNES ROM(.nes) and PRG and CHR (.bin) files using the 45 in 1 Educational Computer mapper. Is that useful for you? (Are bad dumps)

[NewRisingSun]

That's mapper 289. The current version of the Sanni Cart reader supports it. Going by mapper 289's capabilities, size should be 2048 KiB PRG-ROM and 0 KiB CHR-ROM.

[Blunern]

Thanks to your help I have now a dumped playable ROM, thank you very much! I have a couple more questions though, and I'd love it if you could help me understand them.

1) why is fceux not working with mapper 289? And why is it that when I dump the ROM, the ROM gets generated with another mapper but 289 and I have to change it manually in fceux's debugger tool?

Also I'd love to contribute this ROM to the no intro community, is this ROM correctly dumped? How can I check that?

Thanks in advance for your help

[NewRisingSun]

The ROM is correctly dumped; all games run in compatible emulators with no visible glitches. Thank you very much. To answer your questions:

• FCEUX has very little support for bootleg mappers. Use Libretro-FCEUMM for Retroarch on many platforms or NintendulatorNRS for Windows for complete mapper support.
• I assume it writes mapper number 33 instead of 289. That is likely because Sanni's software does not write a proper NES 2.0 header, so it writes mapper number 289 but fails to set the NES 2.0 flag, resulting in mapper number 289-256=33.
• To check whether a cartridge has been correctly dumped, repeat the dumping procedure several times, removing and reattaching the cartridge to the dumper between each attempt, and ensure that the hash value of the dumped data remains constant between attempts. And if the cartridge uses a known mapper, ensure that all games run in emulators without visible glitches.