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jstraa
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« on: August 19, 2009, 02:29:13 PM »
Hi I'm trying to read an SP 1271 for my backups.
I did it on 2 different chips but not working.
My batronix device isn't telling me what kind of chips it are but I know it are
27C512 eproms. Does anyone have a clue which manufacturer it's from  so I can
enter that in the software?

Thanks,

Jeroen
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idesign
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« Reply #1 on: August 19, 2009, 03:13:05 PM »
Try National
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jay
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« Reply #2 on: August 19, 2009, 09:48:10 PM »
also check your chip direction.
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jstraa
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« Reply #3 on: August 19, 2009, 10:00:26 PM »
Chip direction is good. I still get errors, also with National.
I think both SP chips might be bad. (there originals)
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jstraa
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« Reply #4 on: August 19, 2009, 10:13:59 PM »
It says the signature is 1Ch 1Ch ... is that right?
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StatFreak
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« Reply #5 on: August 20, 2009, 11:43:19 AM »
Quote from: jstraa on August 19, 2009, 10:13:59 PM
It says the signature is 1Ch 1Ch ... is that right?

Nope. The checksum should be 92E7h. It is extremely unlikely that both chips would be damaged in such a way as to have the same incorrect checksum. If they are both reading 1C1Ch then I suspect the chip reader, its software, or the user settings.

It's a 28pin chip. Are you placing it in your reader with the base (the pins on the opposite side of the notch) at the bottom of the ZIF socket (the empty ZIF holes should be above the chip, above the notch)?
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jstraa
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« Reply #6 on: August 20, 2009, 11:54:38 AM »
Your the best stat!
I was very sure I put it in correctly, aligned the chip to the other side of the reader and that
did the job, it was auto detected and I can read data.
I always use to read the WMS550 eproms, and thos have 32 pins, so that cannot be wrong,
but this can!

Thanks again
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StatFreak
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« Reply #7 on: August 20, 2009, 01:03:15 PM »
Glad to hear that the chips are okay. propeller
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stayouttadabunker
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« Reply #8 on: August 20, 2009, 11:24:57 PM »
Amazing how just moving the chip in the reader gives ya different results huh? arrow
I'm glad you didn't fry it!  yes
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