Apollo Guidance Computer Part 4 ½: Bonus material, full Logic Analyzer trace explanation uncut

Some inquisitive minds requested a non-edited version of the hard core read-back of the LA trace we obtained in episode 4. Your wish is hereby granted. It's actually quite interesting, provided you are a curious minded enginerd and dedicated follower of this restoration. Normal folks, move right along. Oh, wait, are there any of these left on my channel? Anyhow, I am curious (it's in my name) to see how popular this video is going to be.
Frequent comment answers:
Some relevant links:

[whitslack]

Low-level software enginerd here. I understood 100% of this video and surely appreciate your posting it! I love that you're bringing this old AGC back to life. The AGC is truly a masterpiece in computing history.

[blenderbuch]

Skipped all the middle part to see the gratulation, now feeling very empowered ;-)

[TimoNoko]

Did I miss something, because I thought I understood it immediately. In older machines the CPU registers were visible in memory addresses just for this reason: you can boot without any memory. Usually you could use the front switches and blinkenlights to program instructions to registers. Of course this is also a meta-programming tool, because accessing instructions from core memory is much slower.

[sidewinder]

Be damned, I actually understood most of that. What a nice stroll down memory lane! I was 14 when the family watched Apollo 11 on our Black & White TV in the family room. It wasn't until junior high school that I got to actually interface with computers and accomplish a task, using acoustic couplers to call into the T.I.E.S. HP2000C system, with paper-tape-capable teletypes to run our programs written in BASIC. Our first "computer science" class project was to write a program in BASIC that emulated a race between 4 animals of our choice. I was the only person in the class who used a small-chance random variable that sent the lead animal back several positions if it triggered, which netted me an A+ from the teacher. Been a computer geek ever since, and am still working in the field as I near retirement.

[matthewwilkes]

Thanks for the parity bit! This is great, thank you so much for posting the unedited footage.

[jeremiefaucher-goulet]

I use a Logic Analyser way to often at work... So why do I enjoy these videos so much? I sure don't know why but I do!

[Administrator_O-]

I'm a Network Engineer, not an Electrical Engineer so this was way over my head...but still incredibly fascinating! Technology is technology & history is history, both are immensely important as is the work of this team!

[lwilton]

A lot fancier than the logic analyzers I was running back in the 1970s. And of course fancier than whatever special-purpose test harness they had to build this machine and get it running.

[michaelpeterson]

I have to say this is the smartest bunch of guys ever to put a video on YouTube ! I hope these computers just don’t sit in a garage somewhere you guys should make a working Apollo capsule board that is all lit up like the original people could see it would be a great thing for the air and space Museum

[Carstuff]

This, is, just, BEYOND EPIC!! I love seeing old hardware being brought back to life!!!

[SuprSi]

Wow, this was amazing! Would be cool to see if you could write a simple program to run on it. Mind blowing that it still works after all this time :o

[donmoore]

Brings back memories of using a predecessor logic analyzer to this one in the early 1980's. Very cool project.

[whizzo]

Is there any chance at all that you will be able to find memory modules for your AGM? Or would that be like finding the Holy Grail?

[cpufreak]

you know, I'm high enough to enjoy this but I'm eating a potato

[williefleete]

I'm in the process of re-building my 8 bit discrete logic CPU based on the video series by Ben Eater. slowly getting some PCB cards made for each section of the machine. and adding some of my own mods, such as a few extra registers. That might make me the biggest enginerd here

[mm-hlgh]

thanks for making and sharing these projects ! its far beyond my horizon, but it gives me an idea of what is going on in the computer. And despite your great explaining, its hard to follow.. but still understandable enough to be mindblowing.

[graemedavidson]

Excellent analysis - I suspect few get to watch a computer stepping through the fetch-execute cycle on a logic analyser nowadays let alone an AGC! Great stuff!

[xephon]

I have a question, how come the second time the computer hits location 0000 it doesn't read the register memory again? I rewatched that part a few times but I don't see what makes it actually get stuck looping. Is it the effect of the mask command? Is it because the final command was to actually go to location 0000?

[markwatson]

A Parity Bit!!! I got a Parity Bit!!! Hot damn I'm so bleeping happy I could just $__t!

[tony-jrvr]

can't wait to see the next video!