Finding the right ROMs for arcade emulation can be a maze of "merged," "split," and "non-merged" terminology. If you are using the MAME 2003-Plus
: You can browse individual files or download the entire set from the Archive.org directory listing . Why "Full Non-Merged"?
: First, ensure you have MAME 2003+ installed on your device. You can download it from the official MAME website or other repositories that host MAME versions.
: If you prefer to build your own set using tools like ClrMamePro, you can generate a DAT file directly from the MAME 2003-Plus menu in RetroArch to verify your files.
Hope this helps!