.Towards the end of the PlayStation 1’s life Sony released a slim model called the PSone, or SCPH-10x. Many of these systems have PM-41 boards inside, which is what this page covers. Some of the boards are PM-41 (2) and require you to use a different diagram. The model is printed on your board if you take apart your console.
PM-41 PsNee modchip installation diagram
- 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 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.
Here are some tips I have for you when you are soldering your chip into the PM-41.
- 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.
- If you are using an ATtinyX5, 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.
- For the wires that go into the holes, or vias, of the board: it’s easiest to stick a small 30 AWG wire through the hole, then heat the wire and hole while adding solder.
- For DATA, be careful not to bridge solder to a nearby component, or 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.
- Nobody yet.
This section has photos of some successful installations which you can use to get a better understanding of how everything is wired and positioned.
- Nobody yet.