The most common and widely compatible file for North American games. scph7502.bin Europe (PAL)
Authenticating game data and handling the iconic startup sequence.
Essential for European titles; handles the 50Hz refresh rate. scph5500.bin Japan (NTSC-J) Required for Japanese imports and region-exclusive titles. ps1_rom.bin
Ensure the file names are exactly as listed above (case-sensitive on some systems).
While most users search for the classic scph1001.bin , the ps1_rom.bin file is specifically notable because it is the that can be obtained without owning the original PS1 hardware. It is found within the official PlayStation 3 firmware updates. Since the PS3 is backward compatible with PS1 games, Sony included a highly optimized, region-free version of the PS1 BIOS in its system files.
Most emulators have a dedicated bios or system folder. In RetroArch , this is located in the system directory.
Extracted from PS3 firmware; region-free and highly optimized. How to Install PS1 BIOS
It is important to remember that BIOS files are copyrighted software. The legal way to obtain them is by "dumping" the firmware from a console you physically own or by extracting it from official Sony updates as described with the PS3 method.