| Problem | Likely Cause | Solution | |---------|--------------|----------| | “BIOS not found” | Wrong folder | Move files to data/dc/ | | Black screen after swirl | Corrupt dc_flash.bin | Re-dump or reset flash via Flycast’s “Reset Flash” option | | Region mismatch | BIOS region ≠ game region | Enable “Force Region” in settings or use universal BIOS | | Date/time resets every boot | Flash write-protected | Ensure dc_flash.bin is writable by Flycast | | No VMU saves | Flash not initialized | Boot without a game first, set date/time, then insert game |