This was one of the earlier PlayStation 1 board designs that included RCA composite video output ports on the back. Most SCPH-1001's here in the United States had this board inside.
I sell PsNee modchips in my store.
Additionally many Japanese systems had this board including many SCPH-3000, SCPH-3500, and SCPH-5000's.
PU-8 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 are two installation diagrams for two different versions of the PU-8. The easiest way to know which you have is to look at the size of the Mechacon controller chip (next to SUBQ and SCLK/SQCK). If it's large, use the bottom diagram, if it's small, use the top diagram.
Here are some tips I have for you when you are soldering your chip into the PU-8.
- 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.
This section has photos of some successful installations which you can use to get a better understanding of how everything is wired and positioned.
- William Quade (me)
Ignore the larger board in the diagram, it's a PSIO switchboard.