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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. whitequark‏ @whitequark 30 Jul 2019
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      if this is the bar USB had to compete with, yes, USB is actually better, in spite of also being incredibly poorly designed

      3 replies 0 retweets 65 likes
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    2. Jon Roelofs‏ @jon_roelofs 30 Jul 2019
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      Replying to @whitequark

      how did those usb to ps2 adapters work?

      1 reply 0 retweets 0 likes
    3. whitequark‏ @whitequark 30 Jul 2019
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      Replying to @jon_roelofs

      either 1) mouse/keyboard that supports both protocols or 2) an active adapter that has an USB host/PS/2 device inside

      1 reply 0 retweets 1 like
    4. Hector Martin‏ @marcan42 30 Jul 2019
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      Replying to @whitequark @jon_roelofs

      I don't think the latter exist. Even today, USB mice/keyboards very often are still PS/2 compatible. Back in the day it would've been a hilarious waste of money to make active converters like that.

      3 replies 0 retweets 5 likes
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    6. Hector Martin‏ @marcan42 30 Jul 2019
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      Replying to @aptlyamphoteric @whitequark @jon_roelofs

      It's even the only way to get N-key rolllover on many modern keyboards, because it turns out the USB keyboard boot protocol was designed by idiots and limits you to 6 keys, while PS/2 doesn't.

      1 reply 0 retweets 5 likes
    7. Hector Martin‏ @marcan42 30 Jul 2019
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      Replying to @marcan42 @aptlyamphoteric and

      (it's possible to do NKRO over USB, if you break boot protocol compat, but noobdy wants to do that; you can get both with some clever hacks, but it's nontrivial and not documented as a standard)

      2 replies 0 retweets 3 likes
    8. non-standard nerd, ¬ 🆗‏ @brouhaha 30 Jul 2019
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      Replying to @marcan42 @aptlyamphoteric and

      I don't think anything prevented doing NKRO in non-boot mode and falling back to [2-6]KRO in boot mode.

      1 reply 0 retweets 0 likes
    9. Hector Martin‏ @marcan42 30 Jul 2019
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      Replying to @brouhaha @aptlyamphoteric and

      Boot mode only clients that don't actually switch to boot mode. Yes the default is non-boot. Galaxy brain design right there.

      2 replies 0 retweets 1 like
    10. non-standard nerd, ¬ 🆗‏ @brouhaha 30 Jul 2019
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      Replying to @marcan42 @aptlyamphoteric and

      Who gives a crap about boot-mode-only clients? NKRO is impossible for those, so there's no point in trying. However, that's not a good reason to not do NKRO in non-boot mode.

      2 replies 0 retweets 0 likes
      Hector Martin‏ @marcan42 30 Jul 2019
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      Replying to @brouhaha @aptlyamphoteric and

      The problem is if you have a non-boot mode *at all* then it won't work with the swathes of boot mode only clients that don't explicitly request boot mode.

      11:02 PM - 30 Jul 2019
      2 replies 0 retweets 0 likes
        1. non-standard nerd, ¬ 🆗‏ @brouhaha 30 Jul 2019
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          Replying to @marcan42 @aptlyamphoteric and

          Good.

          0 replies 0 retweets 0 likes
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        1. non-standard nerd, ¬ 🆗‏ @brouhaha 30 Jul 2019
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          Replying to @marcan42 @aptlyamphoteric and

          I found my old keyboard firmware. Almost 20 years later, I can't remember whether I did it deliberately or by accident, but I reset to boot mode, in violation of the HID spec.

          0 replies 0 retweets 0 likes
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