: You can check if RetroArch recognizes your files by going to Main Menu > Information > Core Information while a core is loaded; it will list "Present" or "Missing" for required BIOS files. Common Required BIOS Files Recommended File Names PlayStation 1 SCPH1001.BIN , SCPH5501.BIN , SCPH7001.BIN Sega CD us_scd1_9210.bin , eu_mcd1_9210.bin , jp_mcd1_9112.bin Game Boy (Color) gb_bios.bin , gbc_bios.bin Resources and Guides
| Problem | Likely Fix | |---------|-------------| | BIOS not detected | Wrong folder – confirm ux0:/data/retroarch/system/ | | PS1 games crash on boot | Use scph1001.bin ; avoid SCPH-5000 or newer | | Neo Geo games show “missing files” | Keep neogeo.zip compressed, verify contents | | Sega CD has no audio | Wrong region BIOS – match game region | | PCSX ReARMed shows HLE | Manually select BIOS in Core Options | bios files for retroarch ps vita link