Ken Shirriff has restored an Apollo Guidance Computer (AGC), used in the Saturn V spacecraft. He recently published an article on how the power supplies still worked flawlessly after 50 years. Recently, two embedded computers that I work with burned up their power supplies, so this is really impressive to me! Ken has also written articles on creating a core rope simulator (the way software was programmed), writing software on the AGC to do bitcoin mining, and a more detailed discussion of core rope memory. Finally, he has references to a virtual AGC simulator, and to a great summary page on simulated AGC projects. Wow!