Even with a Full Non-merged set, keep a separate bios folder for large systems (Neo Geo, CPS-1, CPS-2). You can tell MAME 2003-Plus to look in the bios folder first via the RetroArch directory settings.
The core (often stylized as mame2003_plus ) is a fork of the original MAME 0.78 codebase, maintained primarily for the Libretro ecosystem (RetroArch). The “Plus” signifies several key improvements over vanilla MAME 0.78: Mame 2003-plus Reference Full Non-merged Romsets
Use romcollectionbrowser or mame2003-plus-lr -verifyroms via command line (if core supports). Even with a Full Non-merged set, keep a
generated by the core developers to ensure 100% compatibility with the emulator's expectations. 2. Advantages of the Full Non-Merged Format Full Non-Merged format Even with a Full Non-merged set