PU-18 PsNee modchip installation diagram

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

PsNee ATtiny45 pinout

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

PU-18 PsNee installation diagram

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.

  • You don’t need to connect pins one and two of the ATtiny45 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.

  • Nobody yet.

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Jon Stoll

This diagram worked perfectly. Only took about a half hour maybe 45 minutes and I was playing some Pepsi Man and all my 100% legal backups. Thank you.