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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. Hector Martin‏ @marcan42 20 Mar 2020
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      Docs: https://docs.google.com/document/d/1gn6oaT5Ib7CytvlZHacmrSbVBJsD9t_-kmvjd7nUR6o/edit# … Apparently current sample silicon runs at up to 390MHz, because that's where the PLL craps out before the logic does. Oh yeah and the Verilog is open source.

      1 reply 2 retweets 28 likes
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    2. Hector Martin‏ @marcan42 20 Mar 2020
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      "but it can also be used as a general-purpose RF modulator"pic.twitter.com/zyWz2yQGrV

      1 reply 2 retweets 16 likes
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    3. Hector Martin‏ @marcan42 20 Mar 2020
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      "This mode calculates an 8-bit ADC sample and checks for hysteretic triggering on every clock, providing the basis of oscilloscope functionality."pic.twitter.com/dgZY45UGUL

      1 reply 0 retweets 16 likes
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    4. Hector Martin‏ @marcan42 20 Mar 2020
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      People did fake single-ended USB on Propeller 1? Yeah, this one does it properly. At the bit level, of course.pic.twitter.com/AOtMaif7sa

      1 reply 1 retweet 13 likes
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    5. Hector Martin‏ @marcan42 20 Mar 2020
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      You thought that Thumb-2 IT instruction stuff was cute? Try this version. It even handles subroutines atomically.pic.twitter.com/rEt4NSjBEp

      1 reply 1 retweet 10 likes
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    6. Hector Martin‏ @marcan42 20 Mar 2020
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      Look, you need to learn to stop calling this a "pixel mixer" and start calling it 4x8b SIMD.pic.twitter.com/eE4rc5e3dR

      1 reply 1 retweet 16 likes
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    7. Hector Martin‏ @marcan42 20 Mar 2020
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      Like I/O DMA, but with crazy modes. Goer-what?pic.twitter.com/bMGgwVxIbV

      2 replies 1 retweet 10 likes
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    8. Hector Martin‏ @marcan42 20 Mar 2020
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      Native DVI/HDMI. Yes, really. Don't worry, it does NTSC/PAL modulation too, you retro folks.pic.twitter.com/vOl4ORSzXQ

      1 reply 2 retweets 21 likes
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    9. Hector Martin‏ @marcan42 20 Mar 2020
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      These are the things that EVERY SINGLE PIN CAN DO. "PWM switch-mode power supply with voltage and current feedback"pic.twitter.com/Oy962jVDdm

      4 replies 2 retweets 23 likes
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    10. Hector Martin‏ @marcan42 20 Mar 2020
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      It has Forth in the boot ROM. https://docs.google.com/document/d/e/2PACX-1vQKKl_A9gQ8VooCfrLOqw6a_rp9ddyAqiFeo1RopL2AtnHTaWIfvojYq-yfNlqoPD81a2EU1EJsQpRG/pub …

      2 replies 1 retweet 26 likes
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      Hector Martin‏ @marcan42 20 Mar 2020
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      Correction: I don't think the Verilog is open source (though they have bitstreams up for running it on some FPGA boards, misnomered as "verilog"). The Propeller 1 verilog is GPL'ed; I'm not sure if they plan on opening Propeller 2, but I'm guessing they eventually will?

      11:44 AM - 20 Mar 2020
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      • hell writes memory initialization code for fun Keith Gable 🌻 🐊 Chloride Cull 🏳️‍🌈 Schrödin̨ger's Trölł NullMind Ryan Hamel 2ftg _L9NFerdinand8NBachmannL1I0
      1 reply 0 retweets 16 likes
        1. New conversation
        2. Matthew Petry‏ @fire219_SIMPL 20 Mar 2020
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          Replying to @marcan42

          I've been waiting for the P2 to release since almost the beginning. A P1 Demo Board was the first embedded platform I ever used. Even the P1 was an impressive little uC, especially at the time. Mine met its end when I learned the life lesson that "Vcc" and "DCin" are not equal.

          1 reply 0 retweets 1 like
        3. Matthew Petry‏ @fire219_SIMPL 20 Mar 2020
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          Replying to @fire219_SIMPL @marcan42

          We almost had the P2 several years earlier, but they had to change chip fab at the last second -- the chips didn't work at all, despite supposedly being at the same manufacturing node.

          0 replies 0 retweets 1 like
        4. End of conversation

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