Unlike traditional BIOS files that are region-locked (e.g., SCPH1001 for US, SCPH7502 for EU), this version is designed to be suitable for games of any origin.
ps1_rom.bin is the official PS1 BIOS emulator file included within the Sony PS3 system firmware. ps1rombin ps3 ps1 bios new
It often features better compatibility with obscure game titles. It is region-free in many software implementations. How Ps1rombin Works SCPH1001 for US