Skip to content
  • Home Home Home, current page.
  • Moments Moments Moments, current page.

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

Tweets

Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

Tweets

  • © 2018 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    1. Rich Felker‏ @RichFelker Jul 9

      Supposedly the actual history of how Intel's hideous segmented design was invented and pushed as a "feature" by hardware engineers:https://retrocomputing.stackexchange.com/a/6989/2070 

      1 reply 6 retweets 7 likes
    2. William D. Jones‏ @cr1901 Jul 9
      Replying to @RichFelker

      This is a _fascinating_ answer- the OBJ format dictated the processor features. >The reason is that the only programs that exceed 64K bytes in size are coded in high level language I very much don't buy this tho.

      2 replies 0 retweets 0 likes
    3. brouhaha‏ @brouhaha Jul 9
      Replying to @cr1901 @RichFelker

      The answer quoting the report from the meeting attendee goes on to suggest that the meeting most likely defined software support for segmentation, at some point long after the use of segmentation by the hardware was already committed. That seems much more plausible to me.

      1 reply 0 retweets 2 likes
      Rich Felker‏ @RichFelker Jul 9
      Replying to @brouhaha @cr1901

      In any case, designing the whole memory architecture around an efficiency hack for a very specific size range of programs was a ridiculous idea.

      6:23 PM - 9 Jul 2018
      2 replies 0 retweets 0 likes
        1. New conversation
        2. brouhaha‏ @brouhaha Jul 9
          Replying to @RichFelker @cr1901

          I'd agree, but I still don't believe that's what happened. I'm pretty sure the segment/paragraph hardware was cast in silicon before anyone gave much thought to how programs larger than 64K should be structured for it.

          1 reply 0 retweets 0 likes
        3. brouhaha‏ @brouhaha Jul 9
          Replying to @brouhaha @RichFelker @cr1901

          The 8086 was intended to be an improvement over the 8080/8085, but it was primarily intended for embedded systems. It wasn't expected to dominate the general-purpose computer industry. The iAPX 432 was supposed to do that.

          2 replies 0 retweets 1 like
        4. William D. Jones‏ @cr1901 Jul 9
          Replying to @brouhaha @RichFelker

          There is _so_ little information online about iAPX 432 and spiritual successor Rekursiv. From the little I know about them, they both support hardware GC and hardware-OOP. With little information available about "how is this feasible?"...

          2 replies 1 retweet 0 likes
        5. brouhaha‏ @brouhaha Jul 9
          Replying to @cr1901 @RichFelker

          The 432 hardware provided relatively little support for OOP in the modern sense. In particular, there was no hardware support for inheritance (method dispatch, vtables).

          1 reply 0 retweets 0 likes
        6. brouhaha‏ @brouhaha Jul 9
          Replying to @brouhaha @cr1901 @RichFelker

          The 432 GC support was really just a matter of maintaining three possible colors for each object, to support a mark/sweep collector in software. By having three colors rather than two, it supported Dijlstra's parallel GC, so with at least two CPUs, ...

          1 reply 1 retweet 0 likes
        7. brouhaha‏ @brouhaha Jul 9
          Replying to @brouhaha @cr1901 @RichFelker

          ... doing a GC didn't have to stop the system.

          1 reply 1 retweet 0 likes
        8. brouhaha‏ @brouhaha Jul 9
          Replying to @brouhaha @cr1901 @RichFelker

          The major benefit of the 432 architecture, IMO, was that it was capability-based. A capability is basically an object pointer with embedded permissions. It was not possible to forge capabilities, or to access memory without a capability.

          1 reply 1 retweet 1 like
        9. brouhaha‏ @brouhaha Jul 9
          Replying to @brouhaha @cr1901 @RichFelker

          There was, eg., no way to access memory based on an address. To access anything in memory, you had to have an Access Descriptor (capability) referencing a memory segment, and the offset with the segment.

          2 replies 0 retweets 0 likes
        10. 10 more replies
        1. William D. Jones‏ @cr1901 Jul 9
          Replying to @RichFelker @brouhaha

          As an old IBM PC collector: segmentation bytes (pun intended).

          0 replies 0 retweets 0 likes
          Thanks. Twitter will use this to make your timeline better. Undo
          Undo

      Loading seems to be taking a while.

      Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

        Promoted Tweet

        false

        • © 2018 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Cookies
        • Ads info