If using RetroArch, generated DAT files are often stored in your system/FBNeo/ folder.
: FBNeo is an "evolving" emulator, meaning its database is updated frequently. If you use an old ROM set with a new core (or vice versa), the checksums won't match, and the emulator will label it "unknown". fbneo romset unknown
The error message lists specific ROM files that are missing. For example: Verify the following romsets: altbeast ROM with name 317-0078.c2 and CRC 0x8101925f is missing . This tells you: If using RetroArch, generated DAT files are often
The game ZIP only contains unique files and requires a "parent" ROM or BIOS file in the same folder to work. 3. Use a Data Manager (DAT File) If using RetroArch