This board was used with a wide range of consoles from the SCPH-5000’s, and SCPH-5500’s, to even some SCPH-7000’s and SCPH-7500’s.

For more information about PsNee chips click here, for more information about PS1 modchips click here.

PU-18 PsNee modchip installation diagram

Arduino pinout:

• Pin VCC – VCC
• Pin GND – GND
• Pin 3 – Debug TX
• Pin 4 – BIOS A18
• Pin 5 – BIOS D2
• Pin 6 – SQCK
• Pin 7 – SUBQ
• Pin 8 – DATA
• Pin 9 – GATE_WFCK

Above is the diagram for the PU-18.

All of the points are fairly easy to solder to.

Installation tips

Here are some tips I have for you when you are soldering your chip into the PU-18.

• Cut your wires to be as short and direct as possible.
• You don’t need to connect pins one and two of the ATtinyX5 chip. Just desolder the wire.
• A good place to put the chip is underneath where the legend is, towards the middle of everything.
• Use a multimeter to probe around for alternative VCC and GND points closer to where you position your chip for a cleaner installation.

Diagram success rate

Here’s a list of people who have successfully modded their console with this diagram. Leave a comment and I’ll add you to the list.

1. Nobody yet.

Example installations

This section displays example installations to help you get a better understanding what a successful installation looks like.

• Nall Wolf