<game name="sf2"> <description>Street Fighter II: The World Warrior (World 910522)</description> <rom name="sf2.01" size="131072" crc="d92b3c5f"/> <rom name="sf2.02" size="131072" crc="a8e7b7e9"/> ... </game>
To avoid version confusion, always check the exact commit hash of your FBNeo core:
For the power users writing their own scripts or maintaining servers.
Occasionally, FBNeo caches game information. If you previously loaded a game with a bad dump, the emulator remembers. Try going to Folder Settings and clearing the cache and nvram folders, then re-scanning. fbneo romset unknown
When you launch a game with FBNeo, the emulator checks its internal database to verify if the ROM file you’ve provided is . Each game is identified by a combination of files (ROM chips, sound data, graphics, etc.), each with precise CRC32 checksums. If the emulator cannot find an exact match for those files, it will reject the load and display a message like [FBNeo] Romset vr is unknown, aborting or This game is known but one of your romsets is missing files for THIS version of FBNeo .
Unlike console emulators (like those for the NES or Sega Genesis) which read a single, straightforward ROM file, arcade emulators are highly complex. Why Arcade ROMs are Different
Do not modify or delete files inside BIOS archives like neogeo.zip . If you previously loaded a game with a
What are you using? (RetroArch, Batocera, Standalone PC?) Do you know the exact game throwing the error?
Look at the bottom-left corner or the menu. Note the exact version number or the build date. Step 2: Source the Correct ROMset
Avoid using old MAME or FB Alpha sets without converting them first. Each game is identified by a combination of
The clone or regional version depends on a "parent" ROM zip file to run. If you try to load a split clone ROM without the parent ROM in the same folder, FBNeo will fail to identify it. 3. Corruption or Bad Dumps
. These sets include every file needed to run a specific game inside its own zip file, so you don't need to worry about dependencies. Check Your Subfolders
Many users rely on curated collections like "FBNeo Romset Complete (Rollback)." These sets are updated sporadically. If you have Rollback set 1.0.0, but you updated FBNeo to version 1.0.3, you will get "unknown" for any game that had a ROM update between those two releases.
To put it simply:
