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#PICKIT 3 VS PICKIT 4 MOD#

This causes the PS1 to believe that whatever disc is inside is legitimate and proceed to boot up. PSX modchips work by electrically stifling the output originally generated by whatever CD is inside the drive and then injecting a new, faked signal into the CD microcontroller. If you want a real in-depth discussion you can read the original posts by The Old Crow or the No$PSX documentation page or this Modchip FAQ

Because region ( A for America, I for Japan, E for Europe, and W for Net Yaroze) as well as authenticity are rolled into one string, Sony kills two birds with one stone here and achieves region locking as well as copy protection.

However, because the PS1 needs to account for disc read errors, there's a good amount of leeway in what passes the authenticity check.

If the string can't be found or is garbled, the PS1 knows the disc isn't an authentic PS1 game.

Once the controller decides that the disc is/isn't official, the main CPU reads this decision and acts accordingly.

The CD drive controller looks for those strings to identify a disc as official.

This video and this post discuss it reasonably well. SCEA, SCEI, SCEE, or in rare cases SCEW) into official PS1 games in locations which cannot be replicated by a regular reader.

Sony baked (not the technical term) strings (i.e.

Very simply, the principles behind PS1 DRM work as follows:

If you are looking for them I am selling flashed, prewired modchips.

#PICKIT 3 VS PICKIT 4 MOD#

And so then the journey begins, how do I mod this thing? So why keep an old console? Turns out the answer is nostalgia and memories. I remember some games wouldn't load anymore and I had gotten a PS2. They say the apple doesn't fall far from the tree.įast-forward to today and I no longer have my original PS1. He modded my PS1 to have a little switch in the back that would allow it to play burnt games. While I wasn't smart enough to mod game consoles when I was young, my dad wasn't bad at it. I can trace the history of how I got involved in computers back to playing and modding video games. It was one of the first, if not the first, game consoles I owned and it had a profound effect on my future. When I was young I owned a PlayStation 1 (PS1).