How to Install a Modchip in an Original PlayStation | MM3 PS1 Modchip Install Tutorial - YouTube
Darthsternie on Twitter: "Anybody who knows anything about PS1 Modchips able to help me tell what this modchip could be? I can't these solder points anywhere online. It's a PSOne with 12c508A
PlayStation 1 MM3 Multimode Chip For PS1 PSX PSOne | eBay