10 comments

  • oldnetguy 2 hours ago
    EAC-1101 In March 1958, NEC finished its first digital computer, the NEAC-1101. This machine used parametrons, invented by Eiichi Goto in 1954, and was perfected by using a single-turn transformer coupling system independently devised by NEC. This computer was designed for scientific and engineering calculations, and was Japan's first computer to use floating point operations. It was capable of decimal 7-digit floating point operations. It used 3,600 parametrons, 29 types of instructions, and had average performance of 3.5ms for addition/subtraction and 8.0ms for multiplication/division. The memory employed ferrite cores (magnetic core matrix system using the 2 ACs with different frequency), and memory capacity was 256 words (32-digit configuration). The NEAC-1101 was enhanced via improvements like expanding the memory capacity to 512 words, and was used for about 8 years for scientific and engineering calculations at NEC's research laboratory. The results from developing this computer contributed greatly to the development of subsequent parametron computers at NEC.

    https://museum.ipsj.or.jp/en/computer/dawn/0017.html

    • taneq 2 hours ago
      Interesting additional info, IMO this doesn’t deserve the downvotes.
  • sixtyj 3 hours ago
    > In 1954, Eiichi Goto invented the parametron, a logic device leveraging nonlinear parametric oscillation with two ferrite cores. Unlike the vacuum tube and early transistor circuits prevalent at the time, the parametron offered remarkable stability, requiring minimal maintenance compared to vacuum tubes with short lifetime and costing significantly less than both vacuum tubes and nascent transistors. Its simplicity and reliability made it an ideal foundation for computer design. Early applications showcased its superior fault tolerance over competing technologies, such as vacuum tubes with relatively short-lifetime, slow electromechanical relays, and unstable point-contact transistors.
  • mikewarot 1 hour ago
    Meanwhile, in the US, the Univac Solid State computer[1] used similar principles in its patented[3] "Solid State Logic"[2], and was also released in 1958.

    My understanding is that the magnetic amplifiers used in the V2 rocket kicked off a lot of interesting uses of magnetic cores.

    [1] https://en.wikipedia.org/wiki/UNIVAC_Solid_State

    [2] https://en.wikipedia.org/wiki/Magnetic_logic

    [3] https://patents.google.com/patent/US2709798A/en

    • adrian_b 8 minutes ago
      During WWII, Germany used magnetic amplifiers in many different kinds of military equipment, because they had the advantage of being much more rugged and reliable than the electronic devices available at that time.

      After WWII, the technology of magnetic amplifiers was one of many technologies that USA took from Germany and provided to US companies (like also the Soviet Union did with their part of Germany, but while USA took the technical documentation and samples of the products, the Soviet Union moved entire factories to Russia, piece by piece).

  • tiazumdove 2 hours ago
    The quantum flux parametron is a really fascinating design and I always wondered why no one talks about it. You can get to GHz range easily and computing will be adiabatic. Its based on Josephson-junctions so you need to provide very low temperatures. I always thought it was a more promising next gen compute technology than the current quantum computers. Especially when you get to write your own SQUIDs in a SEM. Its like two long rectangles with pads at the end+thin insulator on top+two wires for the contacts for a SQUID sandwich and suddenly you can do complex quantum circuits.
    • chuckadams 13 minutes ago
      "Quantum Flux Parametron" is also the most awesomest sci-fi sounding name, straight out of Buck Rogers.
  • trebligdivad 1 hour ago
    The Elliott 803 computer (a little later) also used magnetic core logic; https://en.wikipedia.org/wiki/Elliott_803

    Not sure if the principal is similar or not. (There was one down at the Bletchley computing museum many years ago when I went down)

  • purplemoonx 1 hour ago
    A link halfway down the page is causing the whole thing to have wide horizontal scroll.

        [that links selector] {
            text-overflow: ellipsis;
            overflow: hidden;
            white-space: nowrap;
            max-width: 100%;
            display: inline-block;
        }
    
    Fixes it but seems overkill - why isn't white-space nowrap; ever enough?

    Or break-word - feel like nobody uses that one even though it has the best name for what I want to do.

    Anyway

  • mamcx 2 hours ago
    As seen in Dr. Stone!
  • iammjm 1 hour ago
    It’s stays fascinating to me how ubiquitous computation is! Seems like almost anything could “run Doom”
  • hnvd8v0o2d 1 hour ago
    Adding my upvote to the pile
  • benj111 2 hours ago
    >Eiichi Goto

    Is it nominative determinism if it's 2 years before the introduction of Goto (1956, Fortran apparently)

    Or maybe it was named in his honour?

    • binaryturtle 2 hours ago
      Goto (as in "Go to") and Goto (as in the romaji version of one of 後藤, 五藤, 五島, …) is simple two things that sound/look the same when written in ASCII w/o spaces. :)
      • cwmoore 2 hours ago
        Please see: “nominative determinism”
        • ranger_danger 2 hours ago
          The last name "Goto" in this case is actually read Gotou (ごとう), but romanization methods are their own flamewar. There's much less emphasis put on the "go" part than the "tou", so pronunciation doesn't actually sound anything like the English word "goto" at all.

          Imagine the spanish word gato. Now elongate the "to", and change the ga to go, and you're close.

          • benj111 1 hour ago
            TBF, do we actually know how goto the statement was intended to be pronounced?

            It's like saying Bob Gif is pronounced with a J so sounds nothing like the file format.....

    • HPsquared 2 hours ago
      There's also GotoBLAS, developed by Kazushige Goto. I wonder if they have any relation or if it's a relatively common name.
    • techaqua 1 hour ago
      pronounced `go toe`