Thats exactly what I was thinking. There would be no point in making an xor to run previously xored program roms run in a different region. But on the other hand, I'd imagine some knowledge of the encryption is needed to run unxored program roms with a hacked xor. It would be nice if someone in the know would comment with a little more than just "nope".


>
> This line makes me think other wise.
>
> "these new XOR's contain incorrect information in relation to what the real
> encryption would return for many addresses when compared to real hardware."
>
> If they were just changing code to alter the region it wouldn't affect the game.
> Other than the normal problems of using region codes with some games. I think
> what he's getting at is some clone games may use the same encryption key. And
> since the code would be similar too the XOR works. But different revs. or
> regions will still have code changes that would be incorrect when you apply an
> XOR not made for it.
>
> If this is true it leads me to speculate that the key could be quite small if
> there's a lot of games that work like this. The remaining games could be brute
> forced easily if the algorithm was known.
>
> Consider this why would someone bother hacking XOR's to do a region switch when
> most CPS2 emu's support region switching. And why would Raz comment on something
> that pathetic? Really no one would care.
>