lucifer

Hi,
A friend of mine wants to read code from locked philips chip P87LPC764 , it is OTP means one time programmable. ie it's code is locked. He needs advice regarding how to break its code or is it even possible to do this .
plz help

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"You're good... but me, I'm magic"

DaWei

First of all, discussions of cracking are against the rules of this forum.

That said, let me clear up some terminology misuse. One time programmable does not mean code is locked. It merely means the device may not be reprogrammed. The bits have been recorded in some irreversible manner. The device may be read, however. If not, it would be of little use.

It's possible that you mean the readability is constrained by some second mechanism. If that's the case, you won't be getting the answer here.

You might try some of your magic .

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lucifer

Alas had i any knowledge of assembly or any thing related feild i would have used the "magic" .And we are not cracking any thing this is an exercise in her (mine friends)grad course so i posted the problem here .

__________________
"You're good... but me, I'm magic"

DaWei

Read the chip from beginning to end as you would any memory and run the code through a disassembler. An ICE would make the task trivial.

__________________
Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code.
Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

lucifer

thanks for the advice dawei

__________________
"You're good... but me, I'm magic"

PhilBon

@DaWei: Whenever I've been in this situation, I've used magic and it works great