This reminds me of this short piece about debugging a live Saturn V (<a href="http://www.zamiang.com/post/debugging-a-live-saturn-v" rel="nofollow">http://www.zamiang.com/post/debugging-a-live-saturn-v</a>), and also a detailed video about the Saturn V's Launch Vehicle Digital Computer (<a href="https://www.youtube.com/watch?v=6mMK6iSZsAs" rel="nofollow">https://www.youtube.com/watch?v=6mMK6iSZsAs</a>) — it had 112 KB of dual-redundant hand-woven magnetic core memory.<p>(Links borrowed from my weekly newsletter about the space industry called Orbital Index <a href="https://orbitalindex.com" rel="nofollow">https://orbitalindex.com</a> — check it out if you like this kind of nerdery.)
This guy's blog is ridiculous(ly good). Browse the rest of it, you'll be glad you did. I'm glad I did.<p><a href="http://www.righto.com/2014/10/how-z80s-registers-are-implemented-down.html" rel="nofollow">http://www.righto.com/2014/10/how-z80s-registers-are-impleme...</a><p><a href="http://www.righto.com/2020/03/inside-titan-missile-guidance-computer.html" rel="nofollow">http://www.righto.com/2020/03/inside-titan-missile-guidance-...</a><p><a href="http://www.righto.com/2016/10/simulating-xerox-alto-with-contralto.html" rel="nofollow">http://www.righto.com/2016/10/simulating-xerox-alto-with-con...</a>
My new favorite YouTuber, CuriousMarc, has a whole series of videos about restoring the Apollo Guidance Computer (AGC).<p>His AGC Playlist:
<a href="https://www.youtube.com/watch?v=2KSahAoOLdU&list=PL-_93BVApb59FWrLZfdlisi_x7-Ut_-w7" rel="nofollow">https://www.youtube.com/watch?v=2KSahAoOLdU&list=PL-_93BVApb...</a><p>His channel is full of fascinating retro-computing and EE videos.