PsNee Region Free Installation (PS1)

the psnee is a mod chip for the playstation 1 to bypass the cd protection to play any region games use an arduino nano/mini or attiny85 you can source these chips on digikey, ebay or aliexpress i recommend an arduino pro mini so will show how to use that you program the chips using the arduino ide i will show you how to configure several boards such as the attiny85, arduino nano and arduino pro mini (my personal choice) note i do not recommend the attiny85 as i have had issues where it just doesn't work for example, in a scph 7502 pu 22 even though it should, it doesn't swapping it out for an arduino nano / pro mini worked immediately start by installing arduino ide open psnee project download the psnee arduino code open up this file in arduino ide program arduino uno as isp we are going to use an arduino uno as the programmer to program the attiny85/nano/pro mini connect an uno to the pc and open the ardiono ide select file > examples > 11 arduino isp > arduinoisp upload sketch this will turn your uno into a programmer now in arduino select this uno as the programmer tools > programmer > arduino as isp selecting pro mini board if using arduino pro mini, in arduino ide tools > board > arduino avr boards > arduino pro or pro mini for the voltage option if you are unsure apply 6v to the raw pin, and measure the vcc pin output to see if it is 3 3v or 5v most clones and aliexpress versions are 5v connecting arduino to uno connect up the pro mini to the uno programming pins as follows program with psnee with all the settings done, scroll down in the psnee code until you see the defines for selecting your board as we are using arduino nano/pro mini , uncomment the #define atmega328 168 if the console has a bios check like most japanese consoles, uncomment the exact model version so the bios check can be bypassed otherwise it will not work now simply compile and upload the sketch using sketch > upload using programmer do not upload it using the upload button this will program the uno not the nano/pro mini/attiny use sketch > upload using programmer make sure you see it writing, as it will finish even if it fails observe that you see the erase and write along with success message installation once you have your pro mini programmed and ready to go, i would follow the official github guide for the steps follow the install pdf here you only need to solder vcc to vcc gnd to gnd psnee data, subq, sqck and gate wfck bios a18 and d2 (if using bios patch)