Unlike modern software emulators (like DuckStation or ePSXe on PC), the PlayStation 3 doesn't strictly "emulate" the PS1 in the traditional sense. The PS3 hardware contains the necessary architecture to run PS1 code natively (on non-backward compatible models, it uses a high-quality software emulator known as ).
scph5501.bin renamed to ps1_rom.bin) to:
Always support the official releases where possible (Sony sells PS1 Classics on the PSN store for PS3/PSP), but for the titles lost to licensing hell or region locks, emulation is the only bridge to the past. Happy gaming, and may your BIOS always be valid. ps1rombin ps3 ps1 bios new
If you have a jailbroken or custom firmware (CFW) PS3, this BIOS is essentially already running in the background. However, for those using emulators like on other devices, extracting the ps1_rom.bin Unlocking the Power of PS1 Emulation on PS3: