> 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".

Calling it a hacked XOR could mean anything even just a change to the rom checksum. Which would probably be required.

Understanding the encryption wouldn't be required just knowing how the xor's are applied to make changes to code.

>
>
> >
> > 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.
> >
>