Jim Granville
Guest
|
 Posted:
Sun Dec 19, 2004 1:59 am Post subject:
Re: GAL/PAL - Read the UES/AND-Array with burned Security Fu |
|
|
Uwe Mattheyer wrote:
| Quote: | Hi all,
Can someone help me?
|
If it is one of the smaller 20/24 pin ones, and you cannot
read the contents, you can reverse engineer.
Start with the circuit (which you wil have, right?), and
determine which are IPs and outputs, then get a good device
programmer that supports IC testing, and write a set of tests
for the PLD. 15-150 lines is typical, and when you have
all plausible IPs testing OK, write the boolean eqns in
something like ABEL/CUPL and compile, and re-test
a NEW programmed GAL against the vectors, and also in-circuit.
-jg |
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in