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koalahedron

HN member
Joined
Sat, Feb 27, 2021, 7:58 PM UTC
HN karma
24
Public activity
30 items

About koalahedron

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Recent public activity

  1. comment
    Comment #26359219

    Even greater is someone understanding my own sardonic sense of humor and putting it to good use. I did have a nice half round of golf today with my wife. What a beautiful day to sp…

  2. comment
    Comment #26352479

    20 years later, looks like they are taking RFPs for re-engining: [PDF] https://crsreports.congress.gov/product/pdf/IN/IN11413 I guess he was right about the engines.

  3. comment
    Comment #26349064

    > I know that jokes aren't really welcome on HN IMO, while I really don't come to HN to find dial-a-joke, or joke-of-the-day, I think some humor is essential in modern life. Since …

  4. comment
    Comment #26346909

    I know Matt too, primarily from him rejecting my Libfive PRs for being " too 1337". But seriously, Matt, I might have a project for an in-person event regarding printing robots. St…

  5. comment
    Comment #26346624

    Thanks! I noticed "PAiA" electronics sold kits of these--I remember that name from back then. Did they sell parts or other kits? Looks like they are still in business. Also noticed…

  6. comment
    Comment #26346150

    I worked at Boeing Wichita (which is no more), and an engineer told me that the B-52 was getting heavier over time because the old wires weren't removed for avionics upgrades. Of c…

  7. comment
    Comment #26338575

    My wife sent me these that she has read and recommends: Textbooks: Cephalopod Cognition by Anne-Sophie Darmaillacq (Editor), Ludovic Dickel (Editor), Jennifer Mather (Editor) Cepha…

  8. comment
    Comment #26332905

    Taken further, you might argue that there might be condemnation eventually of the whole concept of pets and work animals too. I'm not sure I "condemn" these ideas, but I don't have…

  9. comment
    Comment #26331335

    Thanks all, for these references! My wife is into cephalopod intelligence. I'll forward this to her and ask if she has any other recommendations. I do know there are a couple of we…

  10. comment
    Comment #26330925

    I've never heard of Rick and Morty, but take my advice, don't try to shop your screenplay to VCs. They took a dim view of my "Adult Stewie" concept last year (think "Young Sheldon"…

  11. comment
  12. comment
    Comment #26328703

    > Nevertheless simultaneous invention happens all the time. Try telling that to Isaac Newton. :) Or better yet Edison or the USPTO.

  13. comment
    Comment #26323400

    I had that book too, I just recognized it when I looked it up. I don't remember it as well, but apparently it was the display circuitry only.

  14. comment
    Comment #26323320

    > delicious recipes Ha ha He also did the TV typewriter: https://en.wikipedia.org/wiki/TV_Typewriter which allowed people to have something to hook their bare board micro to. I had…

  15. comment
  16. comment
    Comment #26317638

    I think I even discovered "intentional O(random)" complexity with this gem from Acey-Deucy: 270 A=INT(14\*RND(1))+2 280 IF A 14 THEN 270

  17. comment
    Comment #26317357

    By the way, back to the original topic, a bare-bones machine like the KIM-1 also required a lot of hand assembly. I guess everybody is gone from this post too, but I wonder if ther…

  18. comment
    Comment #26311494

    Thanks again. Like you said it is fun to dream (ask the "Scheme Machine" guys sometime about how they would go about it now), but practically with technology like Julia's Zygote: h…

  19. comment
    Comment #26311370

    Everyone's probably way past reading this by now, but for the record I ported the first example to Common Lisp: https://github.com/koalahedron/lisp-computer-games Man that brought …

  20. comment
    Comment #26309879

    Thanks for your thoughtful comment. I'm afraid my DEC assembly language study ended at the PDP-11, but it is edifying to know the VAX had such an instruction. In some domains like …

  21. comment
    Comment #26306159

    I was thinking an interesting (probably not feasible) opcode would be a derivative op for automatic differentiation at the machine level.

  22. comment
    Comment #26305815

    I wanted a KIM-1 or a COSMAC Elf in the '70s, but I couldn't afford one as a kid. I eventually built a ZX81 kit from the proceeds of a summer job as my first computer. The KIM-1 ha…

  23. comment
    Comment #26300078

    I recommend this MIT OCW for people interested in the math behind origami and folding problems: https://ocw.mit.edu/courses/electrical-engineering-and-compu...

  24. comment
    Comment #26299898

    It really seems like it should.

  25. comment
    Comment #26299896

    Furthermore, to get an Emacs-like REPL (Edwin) 1 ]=> (edit) ;Loading "/usr/lib/x86_64-linux-gnu/mit- scheme/lib/prx11.so"... done