Assume you have a PSP with Custom Firmware (CFW) installed.
Modern multi-system emulators like (using the PCSX-ReARMed core) or PPSSPP (the standalone PSP emulator) have a unique feature: they can run PS1 games through the PSP’s emulation layer. psxonpsp660bin bios
You now have a 100% legal, personally ripped BIOS file. Assume you have a PSP with Custom Firmware (CFW) installed
: Once selected, the emulator will use this firmware to boot your PS1 4. Troubleshooting Checksum Mismatch psxonpsp660bin bios