PSX BIOS ROMs Show:Today's Messages ::Show Polls ::Message Navigator Note that the BIOS file names are case-sensitive, so need to be written without caps, and suffixed with ‘.bin’. Scph5500 (NTSC – Japan) scph5501 (NTSC – US) scph5502 – (PAL – Europe) scph5552 (PAL – Europe) You can check the default directory that Retroarch scans for BIOS files under “Settings - Directory - System/BIOS”. Dankcushions Global Moderator last edited. SCPH1001.BIN, scph5500.bin, scph5501.bin, scph5502.bin' The system says, the files are there: Someone have an idea? Thank you very much:) Best wishes, Jan.