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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 14 Nov 2017
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      Cargo cult electronics frustrate me to no end. I'm looking into retro upscaling with an XRGB-mini Framemeister and everyone is throwing around terms like composite sync and sync cleaners and random schematics I've yet to see a single damn scope trace.

      1 reply 3 retweets 15 likes
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    2. Hector Martin‏ @marcan42 14 Nov 2017
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      "You need a sync cleaner!" "You don't with this firmware!" "But maybe you do!" "Here use an LM1881 as a sync cleaner and you definitely need the CSET R-C network even though that's only used for VSync and we aren't even using that feature!"

      2 replies 1 retweet 3 likes
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    3. Hector Martin‏ @marcan42 14 Nov 2017
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      Best part is where someone says where you solder the capacitor matters. Solder the capacitor to the resistor, then the resistor to the LM1881. Not both to the LM1881. Because somehow doubling up 5mm of wiring matters. For a sync separator.

      1 reply 0 retweets 3 likes
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      Hector Martin‏ @marcan42 14 Nov 2017
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      Then there's the people hooking up Dreamcasts to VGA to a sync combiner to the Framemeister. The Dreamcast has a composite sync output pin already. Apparently noone has tried it to see if it works in VGA mode?

      11:38 AM - 14 Nov 2017
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      • D.A.R.Y.L. mr. waddlesplash Kyle Howells
      2 replies 0 retweets 4 likes
        1. Hector Martin‏ @marcan42 14 Nov 2017
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          All I want are, you know, waveforms and voltages. Pretty please? T_T

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        2. maximum clee‏ @slashclee 14 Nov 2017
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          Replying to @marcan42

          You know, I still really want to make a device like the Framemeister, but using a modern ARM SoC with a beefy-enough GPU to approximate the CRT-Royale shaders in realtime.

          1 reply 0 retweets 0 likes
        3. Hector Martin‏ @marcan42 14 Nov 2017
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          Replying to @slashclee

          Getting low latency with something like that would be really hard, though :(

          2 replies 0 retweets 0 likes
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