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Don Eyles Walks Us Through the Lunar Module Source Code
Hack A Day ^ | Jul 5, 2016 | Gregory L. Charvat

Posted on 07/06/2016 4:30:59 PM PDT by Ray76

A couple weeks ago I was at a party where out of the corner of my eye I noticed what looked like a giant phone book sitting open on a table. It was printed with perforated green and white paper bound in a binder who’s cover looked a little worse for the wear. I had closer look with my friend James Kinsey. What we read was astonishing; Program 63, 64, 65, lunar descent and landing. Error codes 1201, 1202. Comments printed in the code, code segments hastily circled with pen. Was this what we thought we were looking at? And who brings this to a party?

We were looking at what is rumored to be the only remaining paper copy of the Lunar Module’s source code.

(Excerpt) Read more at hackaday.com ...


TOPICS: Science
KEYWORDS: apollo; jameskinsey; lunarmodule; moon; nasa; servicemodule

1 posted on 07/06/2016 4:30:59 PM PDT by Ray76
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To: Ray76

What still blows my mind about the code in the Lunar Module was that it tracked the location of the Service Module and AUTONOMOUSLY knew when to launch and what trajectory to fly to rendezvous with the orbiting Command Module. I guess they were worried about not having communication. I’m still amazed that it could do that, given the state of computing back then.


2 posted on 07/06/2016 4:36:14 PM PDT by BobL
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To: Ray76
Jim Lovell: Freddo, how long does it take to power up the LEM?

Fred Haise, Sr.: Three hours by the checklist.

Jim Lovell: We don't have that much time.

3 posted on 07/06/2016 4:39:14 PM PDT by colorado tanker
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To: Ray76

Saved link.


4 posted on 07/06/2016 5:19:43 PM PDT by libertylover (The problem with Obama is not that his skin is too black, it's that his ideas are too RED.)
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To: Ray76
This stuff is online:

Virtual Apollo Guidance Computer (AGC)

5 posted on 07/06/2016 5:19:56 PM PDT by justlurking
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To: Ray76

WOW! Great stuff and great site. Thanks


6 posted on 07/06/2016 5:20:50 PM PDT by rey
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To: Ray76

What CPU did they use?


7 posted on 07/06/2016 5:40:21 PM PDT by libertylover (The problem with Obama is not that his skin is too black, it's that his ideas are too RED.)
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To: libertylover

Not sure of the CPU, but the memory was woven like a quilt! Amazing!

https://www.bing.com/videos/search?q=youtube+apollo+11+woven+memory&qpvt=youtube+apollo+11+woven+memory&view=detail&mid=78DD509F03E0E0D544CD78DD509F03E0E0D544CD&FORM=VRDGARv


8 posted on 07/06/2016 5:46:27 PM PDT by bigtoona (The media, GOPe, dems, commie Pope, hate Trump. He is the destroyer we've been waiting for!)
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To: Ray76

Did anybody find any Easter Eggs?


9 posted on 07/06/2016 6:54:57 PM PDT by Paladin2 (auto spelchk? BWAhaha2haaa.....I aint't likely fixin' nuttin'. Blame it on the Bossa Nova...)
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To: Ray76

Ah, the old green bar printouts, spit out by line printers. You had plenty of room to make notes and scribble in new code, in contrast to the letter size pages that come out of laser printers today. You had stacks of the stuff on the top of the desk representing the programs you were currently working on, and stacks on the floor in the corner of old programs you might have to revisit some day.


10 posted on 07/06/2016 7:12:43 PM PDT by Stevenc131
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To: Nailbiter

ping


11 posted on 07/06/2016 7:49:19 PM PDT by IncPen (Hey Media: Bias = Layoffs)
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To: Ray76

Thanks, btt.


12 posted on 07/07/2016 5:23:24 AM PDT by 2001convSVT (Going Galt as fast as I can.)
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To: brytlea; cripplecreek; decimon; disndat; KoRn; Grammy; steelyourfaith; Mmogamer; dayglored; ...
Wow, excellent story. Y'know, on Apollo 11 Buzz almost shut the hatch just out of habit, then noticed in time that there was no way to reopen it from the outside, and just left it open. This was reported, and future LMs had a 'latchkey'. Thanks Ray76.

13 posted on 07/07/2016 10:01:53 PM PDT by SunkenCiv (I'll tell you what's wrong with society -- no one drinks from the skulls of their enemies anymore.)
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To: SunkenCiv
there was no way to reopen it from the outside

That would have been a disaster! What were they thinking???....................

14 posted on 07/08/2016 6:18:20 AM PDT by Red Badger (Make America AMERICA again!.........................)
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To: Red Badger

It was a training error I suspect — closing the hatch was a natural thing to do.

However, the skin of the LM was so thin, they could have sliced an arm-sized hole to reach the inside latch, and flown back in suits. Would have been inconvenient, but relative to hanging around until the air ran out, not too bad.


15 posted on 07/08/2016 9:19:11 AM PDT by SunkenCiv (I'll tell you what's wrong with society -- no one drinks from the skulls of their enemies anymore.)
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To: SunkenCiv
And the moral of the story?

-Never-ever- under any circumstances leave home without a roll of quality duck tape.

16 posted on 07/08/2016 9:22:29 AM PDT by 7MMmag ( ...itty-bitty hole goin' in, big hole goin' out. bullets that spin and explode sold separately)
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To: Jeremiah Jr
I thought you might be interested in some more detail about the 1201 and 1202 program alarms that occurred during the Apollo 11 lunar landing.

Apollo 11 Program Alarms

Revelation

12:1 And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars:
12:2 And she being with child cried, travailing in birth, and pained to be delivered.

One small step for man; one giant leap for mankind.

That - the lack of the indefinite article - was no mistake or transmission blip.

Nothing is by accident.

"The Eagle has landed."

•bring (a fish) to land, especially with a net or hook:

• informal

succeed in obtaining or achieving (something desirable), especially in the face of strong competition:

17 posted on 08/01/2016 12:14:17 PM PDT by Ezekiel (All who mourn the destruction of America merit the celebration of her rebirth.)
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To: Ezekiel

Leaving out the indefinite article before “man” makes no sense, since “man” in that case is synonymous with “mankind.” The sentence would contradict itself.


18 posted on 10/30/2020 7:22:27 AM PDT by IronJack
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To: IronJack

Leaving out the indefinite article before “man” makes no sense, since “man” in that case is synonymous with “mankind.” The sentence would contradict itself.

Talk about [Divinely orchestrated] timing with this "blast" from the past (thread and post from Jul/Aug 2016). Out of nowhere.

The first Moon landing is one of my favorite subjects. The entire planet had its eyes to the sky in order to hear the first words from a man standing on the Moon. Big big message in it. Go big or go home. Big like, "In the beginning Go.."

The theme of my post is one of the main themes of Purim, which is that nothing is by accident. Perfect. Thanks.

19 posted on 10/30/2020 11:47:41 AM PDT by Ezekiel (The pun is mightier than the s-word. Goy to the World!)
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To: Phinneous

succeed in obtaining or achieving (something desirable), especially in the face of strong competition: <<<

Check the resurrected thread, with the last few comments. It is from 2016. Pinged to me out of nowhere from IronJack, in reply to a post.

The message is all in the timing.

Come on up to the Moon for a great view.


20 posted on 10/30/2020 12:08:44 PM PDT by Ezekiel (The pun is mightier than the s-word. Goy to the World!)
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