# PU\-7 PsNee modchip installation diagram \- William Quade Canonical: Language: `en-US` ![PU\-7 PsNee installation](https://quade.co/wp-content/uploads/2018/11/IMG_20181115_230555.jpg) The PU\-7 was the very first PlayStation 1 board that was released\. It is found on all Japanese SCPH\-1000’s, along with some SCPH\-1001’s, SCPH\-1002’s, SCPH\-3000’s, and SCPH\-3500’s\. This board is unique because it has the pins for S\-Video video output along with the RCA video output ports\. The S\-Video port was only available on the Japanese SCPH\-1000, but the pins are still on other systems with the PU\-7 board\. For more information about [PsNee chips click here](https://quade.co/ps1-modchip-guide/psnee/) , for more information about [PS1 modchips click here](https://quade.co/ps1-modchip-guide/) \. # PU\-7 PsNee modchip installation diagram [![PsNee ATtiny45 pinout](https://quade.co/wp-content/uploads/2018/11/psnee-attiny45-1024x705.jpg)](https://quade.co/wp-content/uploads/2018/11/psnee-attiny45.jpg) 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\-8 PsNee installation diagram](https://quade.co/wp-content/uploads/2018/11/PU-8b-1024x923.jpg)](https://quade.co/wp-content/uploads/2018/11/PU-8b.jpg) Above is the diagram for the PU\-7\. All of the points being soldered to are pretty straightforward pads\. They are all located on the bottom side of the board\. The PsNee is a great chip for the PU\-7 because it supports anti\-modchip games\. The Mayumi V4 isn’t compatible with the PU\-7 at all, and the MM3 doesn’t support stealth mode with the PU\-7\. # Installation tips Here are some tips I have for you when you are soldering your chip into the PU\-7\. - **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\. - Use a multimeter to probe around for alternative VCC and GND points closer to where you position your chip for a cleaner installation\. - Try to position your chip towards the middle of where all the wires need to go, to minimize wire length\. # 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\. This is an installation I did on an SCPH\-1000: [![PU\-7 PsNee installation](https://quade.co/wp-content/uploads/2018/11/IMG_20181115_230555-1024x768.jpg)](https://quade.co/wp-content/uploads/2018/11/IMG_20181115_230555.jpg) 1 Comment Most Voted Newest Oldest ![ELijah](https://secure.gravatar.com/avatar/edf4069c1c4e0c15798773119f0c3f7d51d72551d5f7733e4741e81f04a6ccb7?s=64&d=mm&r=g) ELijah October 10, 2020 11:20 PM can this play pal games with the 1 or the other crystal? 0