Play Station 1 - PSX

Today, I am back to my all hobby from years ago. That is PlayStation, 1 of my first consoles I played. As described on wikipedia, You guys would know that Sony has release hardware for all regions but locked other regions so you can only use CD from regions u bought. I got this ps from my friend, seem case not original from Sony. AT back of this PS give me SCPH-9001, but after open the case it gaive me PU-20 board. This PU-20 board as show in wiki is SCPH-700x model, haha how they put SCPH-700x board in a 900x case? So this is modified version. Lets take more photo after open iron case: Oh here is the mod chip as I searched before: 12C508, this psone is hacked version. But it look undocument when searching on web, darn! So I wipe them out and try another opensource solution: PSnee How to connect diagram: Pin assignments PSNee psxdev PlayStation Arduino Atinny name ps pin...