| Problem | Likely Cause | Solution | |---------|--------------|----------| | Game shows missing ROMs | MAME version mismatch | Update ROMs with ROM manager to match MAME version | | CHD not found | Wrong folder name or path | Folder must exactly match ROM zip name; CHD inside | | BIOS missing (e.g., neogeo.zip) | Not in roms folder | Add all BIOS files (many are included in full set) | | Very slow performance | CPU-intensive game or wrong video settings | Turn on frame skip; disable HLSL/filters; use -video accel | | "This game doesn't work" (red warning) | Emulation not perfect | Check MAME’s "Driver Status" – may require wait for future update |