| Author |
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Marco Torello
Guest
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 Posted:
Thu Mar 10, 2005 7:22 pm Post subject:
Read Protected PIC |
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Hello,
Can somebody tell me who can read rome PIC protected?
I pay good money for that.
Please, post me in pacofix@libero.it
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Guest
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| Posted:
Fri Mar 11, 2005 12:50 am Post subject:
Re: Read Protected PIC |
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pacofix@libero.it (Marco Torello) wrote:
| Quote: | Can somebody tell me who can read rome PIC protected?
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The whole point of write protecting them is that you can't recover the
ROM contents. Well, you can always strip off the plastic and image
the bits, but that's a whole lot more expensive than writing your own
code... |
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Eric Smith
Guest
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| Posted:
Sat Mar 12, 2005 6:10 am Post subject:
Re: Read Protected PIC |
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William P.N. Smith writes:
| Quote: | The whole point of write protecting them is that you can't recover the
ROM contents. Well, you can always strip off the plastic and image
the bits, but that's a whole lot more expensive than writing your own
code...
|
Won't work on most PICs, which use EPROM, EEPROM, or Flash memory
cells. There's no optically visible difference between cells storing
a 0 vs. a 1.
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Theo Markettos
Guest
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| Posted:
Sat Mar 12, 2005 11:26 am Post subject:
Re: Read Protected PIC |
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Eric Smith <eric@brouhaha.com> wrote:
| Quote: | William P.N. Smith writes:
The whole point of write protecting them is that you can't recover the
ROM contents. Well, you can always strip off the plastic and image
the bits, but that's a whole lot more expensive than writing your own
code...
Won't work on most PICs, which use EPROM, EEPROM, or Flash memory
cells. There's no optically visible difference between cells storing
a 0 vs. a 1.
|
Not by looking at them, but you can optically or eddy current probe them:
http://www.cl.cam.ac.uk/~sps32/
Theo
--
Theo Markettos theo@markettos.org.uk
Clare Hall, Cambridge atm26@cam.ac.uk
CB3 9AL, UK http://www.markettos.org.uk/ |
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Roger Hamlett
Guest
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| Posted:
Sat Mar 12, 2005 6:09 pm Post subject:
Re: Read Protected PIC |
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"Eric Smith" <eric@brouhaha.com> wrote in message
news:qhbr9pis7j.fsf@ruckus.brouhaha.com...
| Quote: | William P.N. Smith writes:
The whole point of write protecting them is that you can't recover the
ROM contents. Well, you can always strip off the plastic and image
the bits, but that's a whole lot more expensive than writing your own
code...
Won't work on most PICs, which use EPROM, EEPROM, or Flash memory
cells. There's no optically visible difference between cells storing
a 0 vs. a 1.
'Imaging', does not imply visual. |
You can get the data with a SEM, but the cost is typically perhaps
$20000+. You also then have to work out where each 'bit' resides in the
physical memory structure.
Best Wishes |
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