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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. Richard "mtfnpy" Harman‏ @xabean 22 Dec 2020
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      Holy shit, the @whitequark+@marcan42+others glasglow is out: https://www.crowdsupply.com/1bitsquared/glasgow … GO GET YOU SOME

      7 replies 28 retweets 68 likes
      Show this thread
    2. Jon‏ @JonathanWHendry 22 Dec 2020
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      Replying to @xabean @whitequark @marcan42

      If I connect that to an RS-232-ish interface, would it be able to safely figure out what wire is doing what? (I have a treadmill control panel I need to connect to a treadmill with a seemingly identical control panel but apparently a different interface. Same DB9 plug)

      1 reply 0 retweets 0 likes
    3. whitequark‏ @whitequark 22 Dec 2020
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      Replying to @JonathanWHendry @xabean @marcan42

      for RS-232 you would need a voltage translator; Glasgow only does 0..5V, and RS-232 is usually somewhere between -5..+5 and -12..+12

      1 reply 0 retweets 2 likes
    4. Jon‏ @JonathanWHendry 22 Dec 2020
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      Replying to @whitequark @xabean @marcan42

      Thanks!

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 22 Dec 2020
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      Replying to @JonathanWHendry @whitequark @xabean

      (but since it has diode clamps you might be able to get away with a 1K resistor in series, for RX). Come to think of it, we tested dead 5V shorts, but we never tested that. I should hook up 12V and -12V via a resistor and see if it survives.

      10:12 PM - 22 Dec 2020
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      • hell writes memory initialization code for fun whitequark Piotr Esden-Tempski @esden@chaos.social Jon
      0 replies 0 retweets 4 likes

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