How to Use and Setup Bios Files in Retroarch! Bios File Setup in Retroarch! - YouTube
PSX Bios - Playstation PS1 Bios (SCPH1001.bin) - Download
How to load PS1 BIOs. : r/retroid
News: RetroArch FINALLY gets released on PlayStation 4 with 25 cores including PS1, MAME and experimental Nintendo 64 emulators & VitaGrafix 5.0.0 released for the PSVita with re-written parser and more - Wololo.net