Recovering the ROM of an IBM 5100 using OCR (among other things)

[Chuck Guzis]

On 6/27/19 7:30 AM, Noel Chiappa via cctalk wrote:
>     > From: Liam Proven
> 
>     > This is *epic*.
> 
> Indeed. I was blown away by the complexity of his technique for reading
> the digits.
> 
> I can't believe there wasn't a much easier technique, though, e.g. using a
> logic analyzer and a small program to read through the ROS!
> 
> Perhaps the challenge of doing it his way entertained him, though, like
> George Mallory's famous line about climbing Everest.

Even if one didn't want to get into the innards of the 5100 too deeply,
one could avoid the ambiguity of reading the screen photographically by
intercepting the sweep and video signals.

Lots of ways to skin this cat.

--Chuck