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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. hedge.txt | Mostly Inactive, except when not‏ @hedgeberg 19 Feb 2019
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      Replying to @AbeSnowman

      ...uh, tb3 is also frustrating iirc, largely because all the existing infrastructure for it is polluted with usb-c/usb-pd stuff. Also, pcie has the same security issues as usb, which would be good to solve. @whitequark has some thoughts on tb3 etc iirc.

      2 replies 0 retweets 4 likes
    2.  ☃️‏ @AbeSnowman 19 Feb 2019
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      Replying to @hedgeberg @whitequark

      "some" thoughts... LOL I will concede ignorance in these matters; to my uneducated mind, the external GPU card I purchased for $7 was simplistic and _appeared_ to map traces directly from the port to the card slot. It was a painless install (until I accidentally froze the CPU).

      2 replies 0 retweets 1 like
    3. whitequark‏ @whitequark 19 Feb 2019
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      Replying to @AbeSnowman @hedgeberg

      That's not Thunderbolt then. Model name or PCB photos?

      1 reply 0 retweets 2 likes
    4.  ☃️‏ @AbeSnowman 19 Feb 2019
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      Replying to @whitequark @hedgeberg

      Yeah, I can get those to you, just a mo'

      1 reply 0 retweets 1 like
    5.  ☃️‏ @AbeSnowman 19 Feb 2019
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      Replying to @AbeSnowman @whitequark @hedgeberg

      Ok, having to hit my Archive - this was the project before I drowned the Skull Canyon.pic.twitter.com/5gbMwiD8Bb

      1 reply 0 retweets 1 like
    6.  ☃️‏ @AbeSnowman 19 Feb 2019
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      Replying to @AbeSnowman @whitequark @hedgeberg

      But I do remember a detail that eliminated my confusion - it was an NVMe adapter which used a proprietary cable to connect to the card slot - Thunderbolt was the _other_ option on the platform for eGPU. I went what I thought was the harder road.

      3 replies 0 retweets 1 like
    7.  ☃️‏ @AbeSnowman 19 Feb 2019
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      Replying to @AbeSnowman @whitequark

      pic.twitter.com/CpxGwmlykf

      1 reply 0 retweets 1 like
    8. whitequark‏ @whitequark 19 Feb 2019
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      Replying to @AbeSnowman @hedgeberg

      Yeah it's a hacky piece of shit. Thunderbolt doesn't run over normal USB 3 A/B connections at all. Neither does PCIe; they abuse the GND and VCC pins for sideband signals, and use cable shield for ground.

      1 reply 0 retweets 4 likes
    9. whitequark‏ @whitequark 19 Feb 2019
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      Replying to @whitequark @AbeSnowman @hedgeberg

      But this all works well for you because PCIe is actually brilliant on every level. You could probably run it over barbed wire. The same cannot be said about Thunderbolt in the slightest.

      3 replies 0 retweets 9 likes
    10. hedge.txt | Mostly Inactive, except when not‏ @hedgeberg 19 Feb 2019
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      Replying to @whitequark @AbeSnowman

      To paraphrase @marcan42, iirc: "you could run pcie over different lengths of wet string"

      1 reply 0 retweets 7 likes
      Hector Martin‏ @marcan42 19 Feb 2019
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      Replying to @hedgeberg @whitequark @AbeSnowman

      I don't think I went as far as *different* lengths of wet string... but yeah :-)

      2:39 AM - 19 Feb 2019
      • 8 Likes
      • alex Graham Sutherland (Polynomial^DSS) ohzee Attila Török k4m1 X41 Day Vee Boi ☃️
      2 replies 0 retweets 8 likes
        1. hedge.txt | Mostly Inactive, except when not‏ @hedgeberg 19 Feb 2019
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          Replying to @marcan42 @whitequark @AbeSnowman

          Hence why I said paraphrase and not direct quote. My memory is pretty good for some things, but my memory of spoken word and my image recollection? Pretty bad!

          0 replies 0 retweets 2 likes
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        1.  ☃️‏ @AbeSnowman 19 Feb 2019
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          Replying to @marcan42 @hedgeberg @whitequark

          Conductivity aside, that would create Hopper-like delays in the signal lines, yes?

          1 reply 0 retweets 0 likes
        2. hedge.txt | Mostly Inactive, except when not‏ @hedgeberg 19 Feb 2019
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          Replying to @AbeSnowman @marcan42 @whitequark

          Pcie spec involves relatively robust link training so that it's safely independent of the physical medium. As a result, it's capable of running over just about anything that's conductive.

          1 reply 0 retweets 1 like
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