1202 Alarm: The Code That Saved the Moon Landing
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1202 Alarm: The Code That Saved the Moon Landing
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ナレーター：
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著者：
(00:00:36) What the Program Was Actually For
(00:01:44) Margaret Hamilton at the MIT Instrumentation Lab
(00:03:12) The Problem of Priority
(00:04:05) The Alarms That Almost Stopped the Landing
(00:05:19) The Scale Behind the Code
(00:06:30) The Cold War Context That Made It Urgent
(00:07:51) From Weapons to Navigation
(00:08:54) What Hamilton Named and What It Became
(00:10:03) Earthrise Is Coming
(00:11:30) Nine Hundred Million Witnesses
(00:13:08) What the Software Left Behind
Four minutes from the lunar surface on July 20, 1969, a 1202 alarm flashed across Neil Armstrong's display. Nobody in the crew had seen it in training. Nobody at Mission Control had planned for it. In ninety seconds, a young flight controller named Steve Bales had to decide: abort or press on.
The answer depended entirely on software that Margaret Hamilton had spent years building from first principles at MIT's Instrumentation Laboratory. Hamilton didn't just write code for the Apollo Guidance Computer — she invented the discipline required to write it. She coined the term 'software engineering,' insisting that the instructions running inside a spacecraft deserved the same rigour as the steel and circuits around them. A software failure at 240,000 miles carried exactly the same consequence as a structural one.
The 1202 alarm wasn't a sign the computer was broken. It was Hamilton's priority-display system doing precisely what she designed it to do: recognise an overload, shed non-essential tasks, and protect the processes keeping the crew alive. The machine thought for itself under pressure no simulation had anticipated — and it held.
This episode traces Hamilton's path from a mathematician who stayed for the work, through the problem of building reliable software when no textbooks existed, to the moment her code proved itself in front of nine hundred million watching people. It also reckons with the scale behind her: 400,000 engineers, contractors, and mathematicians whose collective effort made those four minutes survivable.
The Apollo Guidance Computer was the first mission-critical software system in history. The 1202 alarm was its final exam.
This episode includes AI-generated content.
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