In reply to the silly replies to agostino:

Perhaps the guy has a genuine interest in PIC code protection (as I do), or
perhaps he doesent. In any event
I subscribe to the PIC list to LEARN. I write code for PICS but when anyone
mentions code protection then people
on the list go paranoid.

I dont really care if someone copies my code, I only set the code
protection fuses because they are there. I believe
the true art is not in writing the code - but in creating a product that
can be taken to market and generate plenty profit.
If someone copies my code then good luck to them. Now flame me to death!

In reply to agostino:

Yes and No. It depends on how much money you are prepared to pay in order
to utilise the facilities that you may
require in order to crack the code in the chip.

For example to extract the code from a 16C84 is a piece of cake. A
homebuilt PIC programer can be modded to read
the protected code, or look at souces for the UK satelite pirate cards.
There are many devices one can purchase very
cheaply to defeat the code protection on this device. Therefor a home
'hacker' could extract the code.

The 16C57 is a different story. I do not believe it is possible to extract
the code from the device when the code protection
fuse is set using similar methods to the 16C84 (Because the physics of the
devices are different). More costly and
specialised methods must therefore be used. Having just said this however,
recent software methods may be applicable
to an attack on these devices.

I suggest you monitor the newsgroup alt.2600.moderated for a few months.
You should get some ideas that will point
you in the correct direction.

Rgds

Paul Wright
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pauly@global.co.za