Without a valid BIOS file, emulators running within RetroManiagg may fail to launch titles, exhibit graphical glitches, or suffer from severe audio desynchronization.
Close the RetromaniaGG application completely to prevent file lock issues.
If you're having trouble, I can help you or find the BIOS path for a different device (like an Ambernic or Retroid handheld). Which one are you using? Retro Game BIOS Files - What are they? Where? Which ones?
If your BIOS dump is packaged in a compressed archive, extract it to a temporary folder on your desktop. Ensure you see the individual system files (such as .bin ) rather than keeping them locked inside a .zip file. Step 2: Locate the RetroManiaGG System Directory