Front panel switches - what did they do?

Bill Sudbrink wh.sudbrink at
Tue May 24 11:48:24 CDT 2016

Swift Griggs wrote:
> Machine Language Using a Program Listing Using Toggle Switches". That's
> pretty hard core. I'm surprised they didn't at least use component
> displays with LEDs to show the values rather than reading it straight
> off some blinkenlights.

It's much easier to tell if you have a stuck bit
(data or address) with simple LEDs.  This was (and is)
a real possibility in old machines.  Trying to watch
for patterns of HEX or OCT digits to provide the same
info would be really tough.

Bill S.

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