This NES Discrete Mapper board is used to make NROM, CNROM, AxROM and UxROM games. That covers a large amount of the earlier NES titles, including some classics like Castlevania and Mega Man!
Now you can make your own repro / homebrew game without any messy wiring or struggling to find the right donor!
*Requires the NES AVRCIC chip in order to play on authentic NES consoles. Not needed on clone consoles.