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Groomschild (groomschild@poa.st)'s status on Thursday, 15-Aug-2024 04:07:18 JST Groomschild
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- waifu
- [Anonicus]
@waifu @anonicus Back to apollo computers where the coding has to be weaved into the memory with copper wires

In conversation about 3 months ago from poa.st permalink
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  翠星石 (suiseiseki@freesoftwareextremist.com)'s status on Thursday, 15-Aug-2024 04:07:18 JST 翠星石
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  - waifu
  - [Anonicus]
  @Groomschild @waifu @anonicus Although most of Apollo's Guidance computers was programmed with rope memory, they contained a small amount of magnetic-core memory, to allow software reconfiguration; https://en.wikipedia.org/wiki/Apollo_Guidance_Computer?useskin=monobook#Software
  
  This software reconfiguration was useful, as it allowed the Apollo 14 landing to work; https://en.wikipedia.org/wiki/Apollo_14?useskin=monobook#Lunar_orbit_and_descent
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    Apollo Guidance Computer
    
    The Apollo Guidance Computer (AGC) was a digital computer produced for the Apollo program that was installed on board each Apollo command module (CM) and Apollo Lunar Module (LM). The AGC provided computation and electronic interfaces for guidance, navigation, and control of the spacecraft. The AGC was the first computer based on silicon integrated circuits. The computer's performance was comparable to the first generation of home computers from the late 1970s, such as the Apple II, TRS-80, and Commodore PET. The AGC has a 16-bit word length, with 15 data bits and one parity bit. Most of the software on the AGC is stored in a special read-only memory known as core rope memory, fashioned by weaving wires through and around magnetic cores, though a small amount of read/write core memory is available. Astronauts communicated with the AGC using a numeric display and keyboard called the DSKY (for "display and keyboard", pronounced "DIS-kee"). The AGC and its DSKY user interface were developed in the early 1960s for the Apollo program by the MIT Instrumentation Laboratory and first flew in 1966. Operation Astronauts manually...
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    Apollo 14
    
    Apollo 14 (January 31 – February 9, 1971) was the eighth crewed mission in the United States Apollo program, the third to land on the Moon, and the first to land in the lunar highlands. It was the last of the "H missions", landings at specific sites of scientific interest on the Moon for two-day stays with two lunar extravehicular activities (EVAs or moonwalks). The mission was originally scheduled for 1970, but was postponed because of the investigation following the failure of Apollo 13 to reach the Moon's surface, and the need for modifications to the spacecraft as a result. Commander Alan Shepard, Command Module Pilot Stuart Roosa, and Lunar Module Pilot Edgar Mitchell launched on their nine-day mission on Sunday, January 31, 1971, at 4:03:02 p.m. EST. En route to the lunar landing, the crew overcame malfunctions that might have resulted in a second consecutive aborted mission, and possibly, the premature end of the Apollo program. Shepard and Mitchell made their lunar landing on February 5 in the Fra Mauro formation – originally the target of Apollo 13. During the two walks on the surface, they collected 94.35 pounds (42...
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  waifu (waifu@mai.waifuism.life)'s status on Thursday, 15-Aug-2024 04:07:19 JST waifu
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  - [Anonicus]
  @anonicus@shitposter.world free from the void
  
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  [Anonicus] (anonicus@shitposter.world)'s status on Thursday, 15-Aug-2024 04:07:20 JST [Anonicus]
  
  True software freedom resides in not using a computer at all.
  
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