PsNee is an open source stealth modchip for the original Playstation.
It runs on modern microcontrollers like the Atmega32 and ATtiny. You will need some way of programming it. I used an Arduino Uno board with the ISP sketch.
Preparing the Arduino Uno board
Flash an Arduino Uno board with the ISP sketch:
File -> Examples -> 11. ArduinoISP -> Arduino ISP
// #define USE_OLD_STYLE_WIRING
Configure and compile the PsNee sketch into a hex file
Sketch -> Export compiled binary
Wire the ATTiny to the Arduino Uno ISP
Wire up your chip according to the Arduino ISP instructions
|Pin 10||Pin 1|
|Pin 13||Pin 7|
|Pin 12||Pin 6|
|Pin 11||Pin 5|
If you want a flash progress indicator, wire an LED + resistor from PIN 5 to ground.
Write the program
avrdude -C~/Library/Arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/etc/avrdude.conf \ -v \ -pattiny45 \ -cstk500v1 \ -P/dev/cu.wchusbserial1420 \ -b19200 \ -Uflash:w:./psnee.ino.hex:i \ -U hfuse:w:0xDF:m \ -U lfuse:w:0xE2:m
Of course, sub out your serial as appropriate. The same can be done for ATtiny85 by:
That’s the hard part over with! Crack out the soldering iron and follow the install diagrams. I recommend William Quade’s site.