PM-41 (2) PsNee modchip installation diagram

Towards the end of the SCPH-10x PSone production Sony revised the board slightly and released the PM-41 (2) board. This page covers the installation diagram for installing a PsNee chip into the PM-41 (2).

If your board has PM-41 printed on it then you should follow the PM-41 guide instead.

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

PM-41 (2) 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

PM-41 (2) PsNee installation diagram

Above is the installation diagram. Just match each colored pin label in the diagram with any matching colored point on the board. There is a second image of the chip in the diagram showing a good place to position the chip.

If you have a PAL PSone system then you’ll need to use an Arduino board and connect A18 and D2. Otherwise just ignore A18 and D2.

Installation tips

Here are some tips I have for you when you are soldering your chip into the PM-41 (2).

  • You don’t need to connect pins one and two of the ATtiny45 chip. Just desolder the wire.
  • If you are using an ATtiny45, or have a SCPH-101, then ignore pins A18 and D2.
  • Use a multimeter to probe around for alternative VCC and GND points closer to where you position your chip for a cleaner installation.
  • There may also be easier to solder to points for SQCT and SUBQ.
  • Be super careful when soldering SQCT and SUBQ. It’s easy to bridge pins if you aren’t careful.
  • Be careful with the DATA connection, it’s easy to accidentally knock the capacitor off the board.

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 has photos of some successful installations which you can use to get a better understanding of how everything is wired and positioned.

Here are some sample installations I have done in SCPH-101’s:

  • Nobody yet.

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Duncan
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Duncan

I am no expert but was able to install properly on the first try! Having options for most of the connection points makes it much less intimidating, good luck to anyone else doing this mod

Charles
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Charles

Hi. Do you have a diagram with photo for an installation with arduino? Thanks! I’m looking for this PM 41(2) NTSC model but I can’t find anyone…