PsNee

This listing for an PsNee Modchip for the Playstation 1 (Psone, PS1)

When installed properly, These chips will allow for Region Free Disc playback as well as Backup support.

This modchip is a 6 wire install and will work on any Ps1 revision and on any Region Ps1

Japanese Ps1s also have extra protections in the bios, in order to make it region free you will also need to swap the bios with a use bios or the custom nocash bios. I have bios chips available here

PS1 Bios Mod

Keep in mind that Pal games will likely have display issues to the 50htz to 60htz differences.  

For install Diagrams I'd recommend checking out Quade's Page Here!

Check out the github if you'd like to learn more or make one yourself!

https://github.com/kalymos/PsNee