Barcode Scanner ROM Dump

[Brian Bulson]

Hello, I am trying to dump the ROM of a barcode scanner that has a
decoding algorithm most likely located on an EPROM inside the scanner.
I would like to try and dump the ROM to my computer to more closely
examine the decoding algorithm. Are there any resources that might
explain how to do this or what hardware I would need? I figure I
might have to tap into the internal bus and somehow. Any help would
be greatly appreciated.

Thanks,
Brian Bulson

 

[Wade Hassler]

Hello, I am trying to dump the ROM of a barcode scanner that has a
decoding algorithm most likely located on an EPROM inside the scanner.
I would like to try and dump the ROM to my computer to more closely
examine the decoding algorithm. Are there any resources that might
explain how to do this or what hardware I would need? I figure I
might have to tap into the internal bus and somehow. Any help would
be greatly appreciated.

Thanks,
Brian Bulson

You need
1 A disassembler program for the microprocessor used. The Net knows.
2 Some knowledge of uP's operation (esp. vector addresses)
3 Some knowledge of the scanner's hardware
4 Lotsa luck & lotsa time

Additionally, the ROM must be *accessible* -- this might be tricky if
the processor is 'secure.'

Again, good luck. It's an interesting task, but you may be overwhelmed
by details: do you have a friend who knows even a little about the
scanner? If so, talk to him/her.
Wade Hassler