8051 Locks, Was; IBM LPFK reverse engr

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Let us not lose our sense of humor on re-directs shall we ? If you think
this will waste your time, please don't read any further....

I have a PDF ( about 1.3 MBytes ) that supposedly came out of Stanford
University on how to read data from an 8051 with the locks set. They say it
only works on the older parts ( I do not know what was changed or when ) but
it isn't that hard to try it out. If you want a copy of the PDF please
contact me offline so we don't piss anybody else off.

Warmest regards, Steven

> On Sun, Aug 17, 2008 at 01:08:57PM +0100, Philip Pemberton wrote:
> > 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.
> >
> > :(
>
> Bummer, but thanks for checking that.
>
> > Any experienced reverse engineers in the audience, or IBM collectors
with
> > information / drivers / docs for the LPFK?
>
> No, I wish I did, though.  I have two LPFKs waiting for me at home when I
> get back in a few months, and I had been expecting that codeninja's stuff
> was going to work.
>
> I suspect that if PC drivers are unearthed, it will be a simple matter
> to throw a serial analyzer on the line and look for traffic - I'd do that
> myself with an HP4951, but, again, that will months from now.
>
> I wish I could provide help, but without hardware, I'm reduced reading
> this thread and hoping to learn from it.
>
> Thanks,
>
> -ethan