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User: leighklotz

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  1. Re: Got my start with Terrapin Logo on an Apple ][ on Seymour Papert, Creator of the Logo Language, Dies At 88 (mit.edu) · · Score: 2

    Did you try the .OPTION commands that replaced the pokes?

    The C64 port took a long time because of the reduced number of page zero registers available. The biggest problem was that location 0 and 1 were used for the parallel bus port, and there were lots of places where we assumed the CAR of NIL was NIL but instead it was random dat. I had a kernel ROM listing to help with the register usage, and later a 6510 Andy Finkel had fabbed for me to use with a logic analyzer to disassemble and set breakpoints on memory access for the 0 problem.

    I never got the interrupts right for doing setspeed with the sprites... sorry about that.

  2. Re: Got my start with Terrapin Logo on an Apple ][ on Seymour Papert, Creator of the Logo Language, Dies At 88 (mit.edu) · · Score: 2

    Did you ever try the 6502 assembler I put on the MIT (Terrapin) utilities disk?

  3. Re: wine on Wine 1.8 Released (winehq.org) · · Score: 2

    EINE is Not EMACS from the late 1970's followed by ZWEI Was EINE Initially in about 1978, for the MIT Lisp Machines.

  4. The hangers are the adult stage, and if you open your closet very quickly sometimes you can catch them mating.

    I told this joke in Japan once and got a polite explanation that (1) socks don't go missing because Japanese people usually hang up their laundry to dry (2) they don't keep other people's pens because they are other people's property and besides they have their own pens (3) hangers don't accumulate because they return them to the cleaners.

  5. Raiders of the Lost Ark on Why US Gov't Retirement Involves a Hole in the Ground Near Pittsburgh · · Score: 1

    Probably looks like this.

  6. Other QRSS modulation projects on Juno Needs Radio Amateurs! · · Score: 3, Informative

    This modulation scheme is called QRSS and can also be used to send very low power (milliwatt and microwatt) signals around the world ionospherically, and on bands such as VLF (very low frequency). Here the open source from a couple of projects by Hans Summers from a book I edited for the ARRL on the Arduino: http://hamradioprojects.com/authors/g0upl/+qrss-attiny/ http://hamradioprojects.com/authors/g0upl/+mm-shield/ and plenty of links about QRSS from there.

  7. Re:Smart move on After a User Dies, Apple Warns Against Counterfeit Chargers · · Score: 2

    Voltage? Not 5V? I took a quick look through the USB Power Delivery docs and didn't see that.
    Wikipedia doesn't mention it either, though it does discuss the raising of the pre-negotiation current limit from 0.5A to 1.5A, and the max negotiated limit at 5A, which would be 25W.

    http://en.wikipedia.org/wiki/USB#Power

    Do you have any links on the higher voltages?

    You probably already understand, but many do not, that you cannot push or provide current at 5V that the device doesn't want. If your device will draw only 500mA due to its internal design, attaching it to a 2A or 5A port won't do anything.

  8. Find ROT13 Extensions for browsers on A New Benefit For Logged-In Readers: Meet Slashdot's ROT13 Initiative · · Score: 1
  9. Re:Symbolics, Lisp Machines, RMS, GNU EMACS on A Glimpse of a Truly Elastic Cloud · · Score: 1

    Carl Hewitt's "Actor" model, which is the basis for Erlang, was first implemented on multi-server systems on Symbolics Lisp Machines at the MIT-AI lab. The CADR machines could not be produced fast enough to dedicate enough to the project but when commercial ones were available Carl got a grant and bought 6 of them and they called it the Apiary. They didn't use it all the time so i thought of it mostly as a source of free machines, and we are now only just getting to the point where the multi-CPU network based shared nothing architecture begins to be a mainstream approach.

  10. Careful setting dates on Adobe and Apple Didn't Unit Test For "Forward Date" Bugs. Do You? · · Score: 1

    In late 1999, we tested a product by rolling the date forward to 2000-01-01 and it worked fine. Then we rolled the date back to the normal date, and files that got touched during the test period caused trouble, because their modification date was "IN THE FUTURE!?!?!?" as one piece of code put it. The most broken was the timestamp data for a time-based UID generator, which flat out refused to run, saying that it was in danger of generating collisions.

  11. Try quixey on Ask Slashdot: Math and Science iOS Apps For Young Kids? · · Score: 1

    Try Quixey app search (where I work):

    https://www.quixey.com/search?q=science+games+for+3+year+olds

    Or search for sciency things you might want to do with a three-year old:

    https://www.quixey.com/search?q=identify+flowers
    https://www.quixey.com/search?q=name+animals

  12. Re:The Internet Archive already has a good design on Google Engineers Open Source Book Scanner Design · · Score: 1

    See archive.org...

    Yes, that's in the original submission, as you see above. For the record, Brewster Kahle (who founded Archive.org), Jeff and Danny (who did this project), and I are all MIT alums, and the "Internet Archive scanning robot" is from a company called Kirtas, which also has ties to Xerox.

  13. Re:slashdot in the good old days on Google Engineers Open Source Book Scanner Design · · Score: 1

    I remember thinking the same thing then.

  14. Re:The missing link on Google Engineers Open Source Book Scanner Design · · Score: 1

    Yes, it was in my submission but apparently edited for brevity. TL;DW?

  15. Re:Having looked at the design... on Google Engineers Open Source Book Scanner Design · · Score: 1

    In point of fact, for individual scanning, the video even mentions that this linear scanner is SLOWER than a manual scanner such as the diybookscanner. The gains come in that since its automatic, a single person could keep 8 or 10 of them running at at time.

    Yup. Progress in clock speeds has pretty much slowed down, and Google appears to expect future performance enhancements to come in the form of parallelism

  16. Cultural Bias on D&D Monster Study Proves Eyes Have It · · Score: 1

    I'm sure this study is testing cultural bias, not human propensity. In Japan, for example, it's considered rude and direct to look into someone's eyes, and many people look at the mouth, or even slightly away.

  17. Email theft on Court Rules Website Terms of Service Agreement Completely Invalid · · Score: 2

    Email lists are regularly stolen from ecommerce and info sites, as anybody who owns their own domain for email and can give out single-use email addresses knows. I report it every time it happens, and I've only gotten a positive response once, from Walgreen's Photo. Everybody else either fails to answer or points me to their privacy policy (as if that somehow prevented them from having data stolen). My suspicion is that there is a back-door or two in popular mailing-list software that ecommerce sites use; it can't be *that* many corrupt insiders stealing and selling email addresses to have actual human inside involvement.

  18. Re:Enlighten me please on UK's 'Unallocated' IPv4 Block Actually In Use, Not For Sale · · Score: 1

    How many bits for a IPv6 IP vs a IPv4 IP?

    Yes of course they should of thought about this before designing the hardware with a maximum ability to comprehend a ipv4 IP...

    I remember having this discussion with people close to the principles about the NCP to TCP/IP transition when the 32-bit (four octet) address size was picked.
    The sound bite was that it's bigger than the biggest European phone number, so they planned ahead for a time when there would be as many computers as phones, which seemed way enough. (Remember, NCP had a hosts.txt file that listed all the hosts.)

    For DNS, they designed an hierarchical system, but events overtook the hierarchy and people got fetishistic about names, leading to most names being in ".com" and being public-facing. The original theory was that the hierarchy would be more important, with more hosts in organizations and so on.

    But on the IP side, the segmentation with subnetting (and later, classless subnetting) made things more complicated, so it became possible to run out of IP addresses even though there were still plenty available, but fragmented. Along the way with all the subnetting routing got more complicated and there were a few routing table crises that required new algorithms and lots of new designs, and that pretty much works miraculously now, but doesn't solve the walled-off inaccessible IP address problems.

    If you can figure out a way to transparently change who firewalled-off Class A subnet over to a non-routable private net and then release the class A net, you could reset the clock back to the problem IPv4 thought it was solving and become a zillionaire in the process.

  19. Re:Give them away on Ask Slashdot: What To Do With Found Calculators? · · Score: 2

    nobody gets it anymore...you have to say hadoop cluster now.

  20. Moving apps to Lumina on First Impressions of Windows 8 Powered Nokia Lumia 920 and 820 · · Score: 1

    You can get help migrating your apps to the Lumina using a program from Mark/Space that helps you move your data as well.
    http://www.engadget.com/2012/08/31/mark-space-welcome-home-eases-us-into-new-nokia-lumias/

    Disclaimer: I work for Quixey, a company not mentioned in the Engadget article, but which provides part of the back-end service.

  21. Re:Why bother? on FCC Asked To Reassess Cell Phone Radiation Guidelines · · Score: 1

    Or you could use Skype, not pay minutes to t-mobile for using your own wifi, and not have to hang up when you leave the house.

  22. Re:Uh, 1980? on MIT Lecturer Defends His Standing As Email Inventor · · Score: 1

    We called it "mail" and "netmail."

  23. Uh, 1980? on MIT Lecturer Defends His Standing As Email Inventor · · Score: 5, Interesting

    When I got to MIT in 1979 email had been in use for a long time. Both " at " and "@" were in equal use on ITS to send mail over ARPAnet via NCP. I'm not sure what this guy is claiming about having invented email in 1980.

  24. Step 1 on Ask Slashdot: Smartest Way To Transfer an Old Domain/Site? · · Score: 3, Insightful

    I'd create a new domain for yourself first...you need to get off the old one.