Front panel switches - what did they do?
swiftgriggs at gmail.com
Tue May 24 11:56:54 CDT 2016
On Tue, 24 May 2016, Jon Elson wrote:
> The early PDP-11s had a diode matrix ROM for the boot memory. You could
> change the boot code with a wire cutter and soldering iron.
Is that similar to "wire wrap" ? I remember my grandmother talking about
having to snip wires connected to diodes. I think this was in the 50's but
it might have been the 60's, too. She mentioned something like that.
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