How do I add PlayStation bios to retroarch?

playstation bios  Having said that, the PS1 BIOS exposes routines such as: Commands for the CD-ROM drive Filesystem operations Multithreading For the best PlayStation experience, make sure your PlayStation®5 console system software is always updated to the latest version

PlayStation - System BIOS - SCPH-1001 Sony - PlayStation - BIOS Images, Link Sony - PlayStation 2

When I play PlayStation games on my 2ds using retroarch it gives a message : no bios detected add bios for better compatibility  Download Playstation Bios from Retrostic and emulate your favorite games for any console and platform