Emulators do not typically include BIOS files for legal reasons, as they are copyrighted software owned by Sony. While some emulators use "High-Level Emulation" (HLE) to mimic a BIOS, using the original offers:
Understanding the PlayStation SCPH5502 BIOS for Emulation When setting up a PlayStation 1 (PS1) emulator like DuckStation or RetroArch , you will often encounter a requirement for a specific firmware file: . This file is the digital "soul" of the European (PAL) PlayStation console, acting as the bridge between software and hardware emulation. What is the SCPH5502 BIOS?
It initializes hardware, manages memory card saves, and provides the iconic Sony startup sequence. Technical Specifications
