*Important Note 1* If your installing the MM3 chip into the SCPH-100X series, it will NOT be stealth due to way that model has been made. Be sure to leave a reply and i will try to guide you through it (I can make a guide for that programmer as well for people that dont know how). If you have a programmer and i dont have a guide on it. If you have any questions, comments and/or problems about my guides, leave a reply and ill get to it as soon as i can possible. I will make more guide's for more programmers as i go along.

I've been trying to make these guide's step by step and simple as possible. MM3 is the best hex for your PSX as it bypasses 90-99% of of the games with the newest piracy protection (Spyro 3 and Crash Bash have been tested and they work just fine). Pin 6 is also different but is connected to the same place.Recently, I have been making some guides on how to create your own PSX modchip using specific programmers and sometimes its original software and using MM3 hex. I used some alternative points for the power and ground connections (pins 1 and 8) for a cleaner installation. Here is an installation I have done on a PU-23 board. This section has photos of some successful installations which you can use to get a better understanding of how everything is wired and positioned. Placing the chip where the pin two circle is, or below it, seems to be the ideal location for placing the chip.Make sure the wire on pin 3 and 6 don't come into contact with both sides of the component (this is especially common if you run the wire directly on top of the component).You can use tweezers to carefully solder them back on one side at a time, the orientation doesn't matter. Don't push on the components with your soldering iron or they might get knocked off the board.

Pin 4 can either be connected to the pin 4 location in the diagram, or pulled high by connecting it to pin 1 on the chip.

Don't connect pin two of the chip to anything.

Cut your wires to be as short and direct as possible.

Here are some tips I have for you when you are soldering your chip into the PU-23. Since the diagram isn't the clearest I'd like to mention that pin three connects to the left contact on the middle resistor, and pin six connects to the top contact on the left capacitor. Pin four is located towards the top left side of the board. PU-23 MM3 modchip installation diagramĪbove is the diagram for the PU-23.

They also shrunk down the size of the board significantly.įor more information about MM3 chips click here, for more information about PS1 modchips click here. The most notable difference between the 9000 series and earlier consoles is that Sony removed the parallel IO port on the back. Most of these consoles have PU-23 boards inside. The last version of the original PlayStation 1 design was the SCPH-900x.

Mm3 modchip scph 5501 diagram