Have they considered rewriting it in rust?
Well, considering that the program was "written" into the ROM by winding wire around ferrite cores, I'd say it was literally written in rust.
Apollo 11 Guidance Computer source code
51–60 of 150 posts
Re: Apollo 11 Guidance Computer source code
#52Is this what I think it is? PINBALL_GAME_BUTTONS_AND_LIGHTS.s
Unfortunately no. https://news.ycombinator.com/item?id=8063357 "A set of interrupt-driven user interface routines called Pinball provided keyboard and display services for the jobs and tasks running on the AGC. A rich set of user-accessible routines were provided to let the operator (astronaut) display the contents of various memory locations in octal or decimal in groups of 1, 2, or 3 registers at a time. Monitor ro…
The DSKY and PINBALL (something flashy with buttons) was a demo.
And that demo got us to the moon.
"Apparently, nobody had yet arrived at any kind of software requirements for the AGC's user interface when the desire arose within the Instrumentation Laboratory to set up a demo guidance-computer unit with which to impress visitors to the lab. Of course, this demo would have to do something, if it was going to be at all impressive, and to do something it would need some software. In short order, some of the coders threw together a demo program, inventing and using the verb/noun user-interface concept, but without any idea that the verb/noun concept would somehow survive into the flight software. As time passed, and more and more people became familiar with the demo, nobody got around to inventing an improvement for the user interface, so the coders simply built it into the flight software without any specific requirements to do so."
Re: Apollo 11 Guidance Computer source code
#53BURN_BABY_BURN--MASTER_IGNITION_ROUTINE.s - https://github.com/chrislgarry/Apollo-11/blob/dc4ea6735c4646...
I learned a new word: ULLAGE (the amount by which a container falls short of being full)
Re: Apollo 11 Guidance Computer source code
#54No credit to Margaret Hamilton?
Re: Apollo 11 Guidance Computer source code
#55I often wonder about the electronics of 1969 and what was done to mitigate radiation problems.
For instance, the type of memory was called core rope memory https://en.wikipedia.org/wiki/Apollo_Guidance_Computer
For anyone interested, XPrize winner Karsten Becker talks to popular youtube blogger David Jones about radiation, extreme heat & cold in space and specifically talks about bit flip and how electronic parts are sourced for such endeavors.
https://www.youtube.com/watch?v=7JwNmdV2QPs
Interesting to me was the "paper work" cited in the interview for space harden components. In other words, people are concerned with stuff falling back to Earth (wouldn't it burn up?) or used for not so friendly purposes (war).
Re: Apollo 11 Guidance Computer source code
#56BURN_BABY_BURN--MASTER_IGNITION_ROUTINE.s - https://github.com/chrislgarry/Apollo-11/blob/dc4ea6735c4646...
I really wish we can do an AMA with these two, > # THE MASTER IGNITION ROUTINE WAS CONCEIVED AND EXECUTED, AND (NOTA BENE) IS MAINTAINED BY ADLER AND EYLES. I had to look this up, NOTA BENE is latin for, observe carefully or take special notice
I think I'm going to start using NOTA BENE in my source code comments just to be fancy.
[EDIT] On second thought "HONI SOIT QUI MAL Y PENSE" would be much better ("Shame on whosoever would think badly of it")
Re: Apollo 11 Guidance Computer source code
#57From the code comments:
"This source code has been transcribed or otherwise adapted from digitized images of a hardcopy from the MIT Museum. The digitization was performed by Paul Fjeld, and arranged for by Deborah Douglas of the Museum. Many thanks to both. The images (with suitable reduction in storage size and consequent reduction in image quality as well) are available online at www.ibiblio.org/apollo. "
I mean, I realise that this is the least of the amazing achievements we're talking about here, but yea.. respect :)
Re: Apollo 11 Guidance Computer source code
#58Alright, who wants to make a video game using this source code with me?
It's been done: http://nassp.sourceforge.net/wiki/Main_Page
Re: Apollo 11 Guidance Computer source code
#59BURN_BABY_BURN--MASTER_IGNITION_ROUTINE.s - https://github.com/chrislgarry/Apollo-11/blob/dc4ea6735c4646...
I really wish we can do an AMA with these two, > # THE MASTER IGNITION ROUTINE WAS CONCEIVED AND EXECUTED, AND (NOTA BENE) IS MAINTAINED BY ADLER AND EYLES. I had to look this up, NOTA BENE is latin for, observe carefully or take special notice
Also the "NOLI SE TANGERE" for "DO NOT TOUCH".
Re: Apollo 11 Guidance Computer source code
#60Love this line: TC BANKCALL # TEMPORARY, I HOPE HOPE HOPE CADR STOPRATE # TEMPORARY, I HOPE HOPE HOPE TC DOWNFLAG # PERMIT X-AXIS OVERRIDE https://github.com/chrislgarry/Apollo-11/blob/master/LUNAR_L...
I wonder if the Space Shuttle has a TODO left in there somewhere.
Now that's some source I'd love to take a look at