Core Rope Memory, which contained the programs that landed man on the Moon in the 1960s, is insanely complicated. But that won't stop Mike from making a custom reader for it, so he can recover Apollo Guidance Computer programs lost to history. Mike Stewart's Core Rope Visualizer: http://apolloguidance.computer/rope/ Apollo Guidance Computer Restoration Playlist:    • Apollo Guidance Computer Restoration   Core Memory Videos: https://www.youtube.com/watch?v=AwsInQLmjXc https://www.youtube.com/watch?v=7ozNMgx7WtQ https://www.youtube.com/watch?v=e9ih93tuH1k Look Mum No Computer Core Rope Drum Machine: https://www.youtube.com/watch?v=zytjONYkU94 Mike's Electric Stuff Soviet Dialer: https://www.youtube.com/watch?v=tPT6nIRFI_I Stuff that supports the channel: - Amazon links for the tools I use in the lab (supports the channel if you buy from there) https://www.curiousmarc.com/amazon-links - Channel merch on Teespring: https://teespring.com/stores/curiousmarcs-store - Support us on Patreon: https://www.patreon.com/curiousmarc Our lovely sponsors - PCBWay: fast turn PCBs, https://www.pcbway.com/ - Electro-Rent: https://www.electrorent.com/ - Keysight: test instruments: https://www.keysight.com/ - Samtec: connectors: https://www.samtec.com/ - R&D Microwaves: https://rdmicrowaves.com/ Get more technical info on the companion site: https://www.curiousmarc.com/ Contact info: null 00:00 Intro: Apollo Guidance Computer restoration 02:21 What is core rope memory? 05:16 Previous core rope recoveries with our AGC 06:44 Our AGC is sold at auction 07:36 Mike's core rope reader prototype 11:09 Last minute core rope "hack" for Apollo 11 14:04 Software recovered so far 14:48 Trying the reader for the first time and error 17:56 Core rope explanation: data encoding 20:13 Transformer rope is not core rope 21:24 Core rope explanation: reading using bistable cores 26:09 Core rope explanation: molybdenum permalloy cores 28:22 Experimental demo of moly cores 31:49 Core rope explanation: addressing with inhibits 33:59 Apollo core rope simulator, inhibit wires 35:56 Set and reset wires 37:45 Parity wires and the design error 45:02 Mike fixes the reader and tries again 47:38 Success! Congrats Mike!