IBM LPFK reverse engineering

Philip Pemberton classiccmp at
Sun Aug 17 07:08:57 CDT 2008

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?

classiccmp at

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