Goal: There must be a 1 MHz clock.
I’ve got a half-can TTL oscillator. Normally I manage to install them improperly because the dots are weird, so I had to look for the edge that’s not rounded off and use that as a reference.
A lot of people start off with a crystal oscillator. The problem with that is that you then wonder “Hey, did I do the oscillator right?” and goink with a capacitor somewhere in the 20 pF range and it sucks. I went for a oscillator because those are dead-simple by comparison.