I wrote: > 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.
By the way, that's why most front panel implementations have a "light check" function. Bill S.