[shiroiushi]

>The Voyager had a custom-designed processor (well, several) that were basically computers made out of basic logic chips (74xx series);

This was not unusual at the time: many early arcade games were made exactly the same way. They've even been emulated by the MAME project.

[dekhn]

yep, I had fun watching the Ben Eater videos where he builds a retrocomputer out of them. I even bought some of the chips to build a simple 4-bit counter with up/down buttons. It was a real revelation to understand that concept, and I ended up looking at an Apple I motherboard (https://en.wikipedia.org/wiki/Apple_I#/media/File:CopsonAppl...) and noticed the regular array of 74xx chips connected by some elegantly laid-out wires.