HP-IB Census

[Vintage Computer Festival]

On Mon, 16 May 2005, Jim Battle wrote:

> (4) I recently wanted to capture the contents of a ROM that was soldered
> into a board.  I didn't want to unsolder it, so I used by HP 1631D logic
> analyzer to monitor all the pins while the computer was driving it with
> a test program that made sure every address was getting hit.  I used my
> hp87 to drive the logic analyzer via HPIB and repeatedly sampled the
> pins, analyzed what was captured and repeated until I had seen all
> addresses.  Finally I dumped the final ROM image to my PC via the serial
> adapter.  It took me about four hours to figure out how to program
> everything, having never done it before.  it would have been very useful
> for me to have seen other such code before I tried mine.  I'd be happy
> to give you my program in case somebody else finds such a thing useful.

Wow, cool technique!  Would definitely like to see this in the KB.

-- 

Sellam Ismail                                        Vintage Computer Festival
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International Man of Intrigue and Danger                http://www.vintage.org

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