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رایانه راهنمایی آپولو بخش مهمی از تاریخچه رایانه است و این یك بخش اساسی برای ساختن آپولو برای ماه می باشد. و در جای دیگر در یوتیوب ، تیمی از جادوگران الکترونیک سعی کرده اند رایانه ای را که 50 سال پیش رها شده بود زنده کنند ، و من به اندازه کافی خوش شانس بودم که در همان لحظه دقیقاً موفق شدم که همه چیز را بر روی سخت افزار اصلی خود اجرا کند.

شما باید یک نکته را در تماشای سریال های چند قسمتی Curious Marc در تلاش خود برای بازگرداندن این رایانه – 50 سال پس از ساخت اولیه آن – بیان کنید.
  

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39 پاسخ به “راه اندازی مجدد یک رایانه 50 ساله – ساخت رایانه Apollo Guidance دوباره”

  2. from the schematic it shows that 90 percent of the transistors used were Jfet transistors ( there amplifier transistors so it makes sense) the numbered block in the middle of each square is the core memory for that set of transistors . all of the rope memory and the rope processors were all hand wrapped by dozens of women who had been trained to do the work because of there small hands and ability to do the close up work . out of all the memory they made very little of it ever had a mistake or a failure they were that good and it would be an absolute pain to repair so they did it right the first time

  3. Excellent work. My father and uncle were machinists at the space science lab at UC Berkeley. I remember them being involved in making a lot of stuff for the Mariner Mars probe , Viking ,and Apollo. Of course, the University treated them all like crap so the quit and went into business for themselves. It's a pity. They really liked the whole space field.

  7. @9:54 one of my teachers in college designed the some of those PCBs shown. They are 6 layer boards and he believed was the 1st of it's kind ever with that many layers and subsequent needed precision, so NASA had to invent the process to manufacture the board. He still had (circa early 2000s) the silkscreens used to mask the board, which were all done by hand of course.

  8. Core memory – consists of thousands of extremely small ferrite toroid cores. Each core is a bit for a part of a digital word which has several wires passing through each core. A single core is about one-half the size of this o. Some wires are X/Y read/write lines, sensing lines, etc… Core memory is always destructively read. A fast pulse is applied by circuitry on the core circuit board to the core through a read wire. This produces a small signal in a sensing wire through the core as to whether the core (which functions as a single bit in a digital word or byte) was set or reset. Reading data always erases a core.

    A set condition is detected by circuitry on the core module, which automatically sets the core back to the state it was in to restore the data.
    Women were the workers who made these, using sewing-needle like tools while working under a microscope. Core memory is woven into a fabric one tiny core at a time, to create a matrix that to the unaided human eye looks like a coarse fabric. NASA used these because cores are highly immune to radiation commonly present in space. Solid-state chips are not. For decades the Space Shuttle used core memory as well until about 25 years ago when it was upgraded to solid-state memory when data loss problems were solved.

  9. FranLab did a video of an accurate re-manufacturing of a functional reproduction DSKY module from the original design and components. I think a few others did the same. Look it up on YouTube. 03-07-2020.

  10. Great Video! How is the Pottting (?) removed? without damaging the underlying structures ? Thats the epoxy used to enclose everything ? I thought that was to prevent reverse engineering in addition to a protective role?

  18. This technology reminds me of the early HP calculators though not exactly. Back starting 1986 I worked for Litton Guidance and Controls in SLC in the final test area. I worked on the cruise missile inertial nav systems. These huge grey blocks fit directly in the cruise missile nose. It used the same tiny wired ferrite core memory system. It has to be ferrite core so it wouldn't be compromised while en-route to it's intended target. Thumb's up on this video. Thanks.

  23. The thing that really impressed me was that in a 50+ year old prototype machine the only things that were actually broken were the core memory and it’s associated amplifier circuits. The core logic all seemed to still work fine with no restoration required.

  24. 1:58 – the “fly by wire” aircraft mentioned was a NASA project intended to prove that the digital auto pilot/fly-by-wire functionality worked well enough to control a spacecraft.

    They had an AGC installed in this jet (an F-8, I think) before it ever flew in space. I don’t know anything about an AGC in a submersible but I believe it if you say it happened.

    So ASTP may have been the last time it was used operationally. I’ll have to research the submersible aspect but I know the use in the test jet was before Apollo, atleast the first time it flew on a test plane.

  26. My God man. I've got degrees in this stuff – at least from a 90's perspective. I repair 70's and 80's machines for fun.

    These guys are… ummm… I don't have a word to describe the peak nerd Jesusness (is that actually a word?) of these guys.

  28. Does it make sense that the US government would televise a mission to the moon live , a monumental endeavor that had so many things that could go terribly wrong and realistically had a very high percentage of something going wrong almost for sure! And considering that not only all Americans but the whole world could possibly watch American Astronauts suffer a horrible death and a monumental failure of our space program that if it failed and the world had watched our American Astronauts suffer a horrendous death on live TV it would most certainly have ended the space program for sure, not to mention the disgrace of having to accept that the Soviet Union had out done the USA and in our inability to accept that we couldn’t out do the Soviet Union in space has cost our Astronauts there lives.
    Do you honestly think that our government would have taken that chance? Especially in 1969 when the US would have done anything to out do the USSR and absolutely wouldn’t have taken any chance of things going horribly wrong and destroying our reputation and how the world looked at us as a nation, it was paramount to our government that we appeared as if we had the upper hand and we could out do the USSR at everything.
    THERE IS NO WAY THAT OUR GOVERNMENT WOULD HAVE TAKEN THAT CHANCE ! NO WAY ! If we did go to the moon , it wasn’t televised and I guarantee that ! What the world watched was a stage and a it was filmed here on earth ! Really think about it hard, they just couldn’t take that chance with so much at risk.

  29. Great piece. Really enjoyed this, especially after having the chance to visit the Computer History Museum in Mountain View last fall, and seeing various Apollo hardware …

  32. It's cool, of course, in a nerdy way… but it's a bit like historical reenactments… no matter how much you tinker around with the clothing, the weapons, horses or boats… you are not and never will be a Roman soldier, a Viking or Columbus. So now you got the Apollo guidance computer running… congrats… you are still sitting in a lab on the ground, tinkering with somebody else's historical achievement instead of making your own. You are not going to the moon. Neither does an astronaut's life depend on your skills… now or ever. Meanwhile the folks at SpaceX are going to Mars…

  36. I don't understand almost any tech behind this, but I'm just getting sentimental over here. They brought this funny old machine back out to light, they fixed the missing connections, they introduced themselves to it via its own ultrafast and super-miniaturized grandchildren… and then, after 50 years of dormancy, albeit in a simulation, let it do the one thing it was born to do and was born to do well.

  38. It was an awesome moment when that thing came back to life. It's a genuine credit to the team that worked on it.

    Indeed, it's like finding an old car or motor/engine of some kind that has been sitting for 50 years, getting it going and knowing you're the first to hear and see it run in that whole time.

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