On Tue, 23 Nov 1999, Darren King wrote:

> Really its not so much the code, but how the device works in certain
> situations can really give away certain keys to everything.  Who needs the
> code when you could write code to make it do that anyhow...  Inside a box
> its not so obvious but reverse engineering is about 90% just figuring out
> HOW it pulls of what it does.

  When I reverse-engineered a little PIC that later was to become known as
the "Playstation Mod Chip", this is precisely how I did it.  I did not
care what code was inside the PIC, I just stuck my logic analyzer on the
I/O pins and observed the timing tables the part generated.  My first try
at duplicating the function wasn't even written in PIC assembly, it was
written in Z8 assembly.  What then followed has long since passed into
folklore...

  "What one man can invent, another man can discover."  --Sherlock Holmes

   --Crow

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