The First Microprocessor: F-14 Central Air Data Computer [video]
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The instruction bits and 20 bit input numbers were set by hand. Can you fathom the amount of deliberation that went into programming such a system? Here I am gluing API calls together that process a bunch of arrays in cloud storage. I'm working four layers above HTTP serialization.
There's a ton of fluff & setup to the video that did nothing for me. If you actually want to hear about the computer, skip to 29m mark.
That is a bit unkind, anyway, there are chapters in the video description including the one titled "System architecture"
The background on what the F-14 Tomcat was, the comparison to the 4004 cpu: those didn't have a ton of value to me personally. I was vaguely aware of a lot of that.
The mp944 was an insane, complex, gorgeous system. Getting into how it worked was fantastically engrossing to me.