IBM LPFK reverse engineering
mcguire at neurotica.com
Sun Aug 17 13:12:47 CDT 2008
8051s cannot execute code out of RAM; they are Harvard-
On Aug 17, 2008, at 1:00 PM, Scanning wrote:
> Could you execute a small loop in RAM that iterates the flash and
> pukes the
> code byte by byte onto the serial bus ?
> / steven
>> Philip Pemberton wrote:
>>> I don't think there's much that can be done with the LPFK without
>>> desoldering the 8051 chip and reading out the program. Catch is, the
>>> chip has probably had its encryption table programmed, and
>>> probably the
>>> lock bits as well...
>> I was right.
>> The 8051 has both lock bits programmed. Zero activity in program
>> mode, all
>> outputs Hi-Z.
>> Any experienced reverse engineers in the audience, or IBM
>> collectors with
>> information / drivers / docs for the LPFK?
Port Charlotte, FL
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