Front panel switches - what did they do?

Bill Sudbrink wh.sudbrink at verizon.net
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.






More information about the cctech mailing list