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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
      Show this thread
    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
    5. This Tweet is unavailable.
    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

      I don't care about those either. They're broken and there's no way to support them properly, so if my keyboard that adheres to the standard makes them burst into flames, I'm fine with that.

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

      People care about keyboards working with their BIOS. Anyway it turns out if you prefix your non-boot mode report with 8 "don't care" bytes that juuuust so happen to be a valid boot mode report, it works with more of those broken BIOSes.

      11:06 PM - 30 Jul 2019
      0 replies 0 retweets 0 likes

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