Time scales of a PDP-11/34
Take a journey into a running PDP-11/34!
A logic analyzer is connected to various CPU signals, and the '34 is powered on.
Then we zoom into different time scales between 100 millisconds and 10 nanosconds and watch what the CPU is doing.
Of course this article is influenced by the famous video "Powers of Ten", which was created only a few years after the PDP-11/34. (Must link to the xkcd version here!