Dan PortsThis is what pull requests used to look like.
(The last sentence is particularly remarkable!)
Irina@dan How was the lunar landing on July 20, 1969 jeopardized? I thought it went through without a glitch!
F4GRX Sébastien@irina @dan No, the 1201 and 1202 errors that happened during the last phase of the landing were unexpected. It took a quick and critical analysis from experts on the ground to determine that these errors were still GO.
In fact the spurious radar input (and Aldrin's computer display selections) overloaded the computer, which rebooted several times, but was programmed so cleverly by Margaret Hamilton and her team, that it recovered from the proper checkpoint and continued to provide guidance.
One other interesting detail is that none of the flight controllers had thought too hard about which computer alarms were safe to ignore until one of the last simulations before the launch, when the simulation supervisor hit them with a program alarm, and they needlessly called for an abort. They worked out a cheat sheet of alarm codes and what to do with them afterwards, so they were quickly able to recognize that it was OK and the real landing could continue.
LP🔸Light up the night