IBM LPFK reverse engineering

[Dave McGuire]

On Aug 17, 2008, at 3:26 PM, Philip Pemberton wrote:
>>   CRAP.  I was about to dig out mine and yank the 8051.
>
> I'm not 100% sure if my programmer is even following the spec, it's  
> basically a PIC18F452 micro, a 74HC4040 counter and a bunch of  
> resistors. If you've got a proper 8051 programmer, then it might be  
> worth trying it...

   I've got DataIO Unisite and 2900 programmers here.  Right now,  
though, I'm preparing for a hurricane, then a cross-country drive  
(from Florida to Wisconsin and back) immediately thereafter, so I  
won't be able to spend any time on this until afterwards.

> Meanwhile, I'm buzzing out the PCB, then I'm going to pull some of  
> the larger components and take pictures. If I can get a bit of  
> spare time, I'll see about borrowing the inspection scope and  
> camera at work for a couple of hours to get some decent PCB pics.  
> Scanning isn't going to work, not with the LEDs as tall as they are...

   If you put the time into figuring out what's where on the board,  
I'll write new firmware.

   Speaking of the LPFK units...Someone, Paxton I think, was  
arranging a bulk buy of them at one point earlier this year.  I  
thought I had gotten in on that deal, but I haven't heard anything.   
Whatever happened with that?  I'd like to get a few, especially if  
I'll be writing new firmware for them.

            -Dave

--
Dave McGuire
Port Charlotte, FL