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600e EEPROM dumped but can't find password

 
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Mister_Og
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Joined: 06 Oct 2009
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PostPosted: Tue Oct 06, 2009 11:54 pm    Post subject: 600e EEPROM dumped but can't find password Reply with quote

Hi, I've built the simple circuit and for zeners I used 1N5231B and not C5V1.
I read the EEPROM and everything was OK, I got a 1KB file.

but when I look at 0x330 I see only 0xFF, here's an image:



Please help me Crying or Very sad
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victor
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PostPosted: Wed Oct 07, 2009 1:37 am    Post subject: Reply with quote

Hi,

Run patcher.exe prior reading, seems like the block is read protected.
>patcher
>r24rf08 dump.bin
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Victor Voinea
ALLservice HQ, Romania.
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Mister_Og
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PostPosted: Wed Oct 07, 2009 7:13 am    Post subject: Reply with quote

victor wrote:
Hi,

Run patcher.exe prior reading, seems like the block is read protected.
>patcher
>r24rf08 dump.bin


Hi Victor, thank you for the quick reply.

I forgot to say that I already tried to run the patcher prior to the reader, the patcher said that patching was successful but I get exactly the same dump file (same CRC32).

By the way, my Atmel chip has 14 pins. If you need any more information, please ask.
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Mister_Og
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PostPosted: Wed Oct 07, 2009 9:53 am    Post subject: Reply with quote

Here is a picture of my wiring, red is SDA, yellow is SCL (ground is connected elsewhere) :



I tried to read the EEPROM with another computer - a Pentium 166, got the same file (same CRC32). Again, with or without patcher
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victor
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PostPosted: Wed Oct 07, 2009 10:41 am    Post subject: Reply with quote

Then I can only assume that this is the real content and somebody tried a wrong program to FF the eeprom. I've seen this a few times.
The laptop has CRC errors of course.

We can fix that but W24RF08 license is required.
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Victor Voinea
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Mister_Og
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PostPosted: Wed Oct 07, 2009 11:27 am    Post subject: Reply with quote

Success!!

I found the problem, I will explain soon.
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Mister_Og
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PostPosted: Wed Oct 07, 2009 12:28 pm    Post subject: Reply with quote

OK, up untill now I only read the AT24RF08BT when I got to this screen:



Because I wanted to wait until all activity stops.

But now I tried again but this time I read the EEPROM while in the password screen, I.E:



And I saw I got a different CRC32 so I looked at that file and presto! Got the password.

But I was curious so I tried to read the chip twice more to be sure, now I have no doubt - you must do the reading ONLY when you are being asked for a password ( at least on an IBM ThinkPad 600E ).

By the way, the chip is located under the CPU heatsink in 600E, here is a picture:



To read it I had to transfer wires through the battery connector, it's very easy and I'd recommend it for everyone. It looks like this:






Thanks again Victor!
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victor
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PostPosted: Wed Oct 07, 2009 4:01 pm    Post subject: Reply with quote

But of course, you have to do that when the laptop is idle, if you do it too soon, the SMBus is busy. Just wait a bit until HDD led is off and the pass prompt is on screen.

Well done and thanks for the nice pics.
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Victor Voinea
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