Mike Stewart recently acquired an original source code listing of Apollo 12, that he had been working on for years. In this longish video, he gives us a glimpse of what's inside, including the software fix for the infamous 1202 errors that had plagued the Apollo 11 landing.

0:00 How we got the Apollo listings
2:45 How to read the assembly listings
16:50 Landing on the Moon with the P66 program
18:15 1202 error fix code added after Apollo 11
24:27 Version control in the 1960's

The scan of the listing has been made available to all right here, thanks to Mike's dedication and the Internet Archive:
https://archive.org/details/luminary1...

The clean, hand-recovered, checked and known-to-recompile code derived from this listing is available here, also the master work of Mike Stewart:
https://www.ibiblio.org/apollo/listin...

Here is a link to the installation instructions of the unmodified Orbiter/NASSP software, which flies with the original code:
https://www.orbiter-forum.com/showthr...

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