Author Topic: The Computer Hack That Saved Apollo 14  (Read 1098 times)

Offline catdlr

  • Member
  • Senior Member
  • *****
  • Posts: 4647
  • Marina del Rey, California, USA
  • Liked: 1472
  • Likes Given: 901
The Computer Hack That Saved Apollo 14
« on: 09/01/2017 03:39 AM »
The Computer Hack That Saved Apollo 14

Scott Manley
Published on Aug 31, 2017

Apollo 14 almost never made it to the lunar surface thanks to a hardware failure which caused a short circuit in the abort switch. With the computer seeing the abort switch enabled the software team back on earth had a limited amount of time to figure out how to make the computer ignore the erroneous signal while still performing the landing. This required tweaking program state in memory while the program was running, a delicate operation with dire consequences for failure. No pressure guys.

https://www.youtube.com/watch?v=wSSmNUl9Snw?t=001

Tony De La Rosa

Offline Michel Van

  • Full Member
  • *
  • Posts: 113
  • Liege, Belgium
  • Liked: 32
  • Likes Given: 69
Re: The Computer Hack That Saved Apollo 14
« Reply #1 on: 09/01/2017 08:44 PM »
and next to that
The landing protocol in audio and video

« Last Edit: 09/06/2017 04:23 PM by Michel Van »

Offline Sam Ho

  • Full Member
  • ****
  • Posts: 497
  • Liked: 182
  • Likes Given: 2
Re: The Computer Hack That Saved Apollo 14
« Reply #2 on: 09/01/2017 09:47 PM »
Transcripts are here.  The ABORT button issue makes up about half of this page.  Discussion of the situation and the edits runs from 104:29 to 107:28, and the actual commanding is from 108:02 to 108:03.

https://www.hq.nasa.gov/alsj/a14/a14.landing.html

Tags: