Sony PlayStation Modchip Installation Guides

PIC microchips 12C508, 12C508A, 12C509, 12C509A, 12F508, and 12F629 are all cross-compatible as they have the same pinout as each other.

Mayumi 4
– SCPH-7502 / PU-22

MultiMode3 (MM3)
– SCPH-750X

Am I missing any models? Send me a message via the contact page and I’ll put a guide together for the particular model and chip you have! 🙂

References
https://web.archive.org/web/20191109112030/https://assemblergames.com/threads/tutorial-making-your-own-ps1-modchips.55904/