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oe1cxw's profile
Claire Xen 🏳️‍⚧️🏳️‍🌈🧙🏻‍♀️ BLM 🏴🚩
Claire Xen 🏳️‍⚧️🏳️‍🌈🧙🏻‍♀️ BLM 🏴🚩
Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩
@oe1cxw

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Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩

@oe1cxw

Neurodiverse trans geek girl. Yosys, RISC-V, SAT/SMT.

She/her/hers
clairexen.net
Joined September 2014

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    Two-way (sending and receiving) short codes:

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    1. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 5 Jul 2016
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      I've just released PonyLink: A single-wire bi-directional chip-to-chip interface for FPGAs on GitHub:https://github.com/cliffordwolf/PonyLink …

      6 replies 24 retweets 33 likes
    2. Michael Field‏ @field_hamster 6 Jul 2016
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      Replying to @oe1cxw

      Why 8b/10 b, when it doesn't appear to preserve DC balance or run at constant bit rate? Might be scope for better coding scheme...

      1 reply 0 retweets 0 likes
    3. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 6 Jul 2016
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      Replying to @field_hamster

      DC balance is preserved well enough to use caps or magnetics in the link. But I haven't done a lot of testing with that.

      1 reply 1 retweet 0 likes
    4. Vertigo‏ @SamuelAFalvoII 6 Jul 2016
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      Replying to @oe1cxw

      @ico_TC @field_hamster A true 8b10b encodes to DC-biased codes. Change out the 8b10b encoder, and this should be fixed easily.

      1 reply 0 retweets 0 likes
    5. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 6 Jul 2016
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      Replying to @SamuelAFalvoII @ico_TC @field_hamster

      No. 8b10b is a dc-free code with running disparity.

      2 replies 0 retweets 0 likes
    6. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 6 Jul 2016
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      Replying to @oe1cxw @SamuelAFalvoII and

      Bc. of the pulse length encoding used in PonyLink, PonyLink is only statistically dc free.

      1 reply 0 retweets 0 likes
      Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 6 Jul 2016
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      Replying to @oe1cxw @SamuelAFalvoII and

      But its good enough for most link types that require dc free codes.

      10:10 AM - 6 Jul 2016
      1 reply 0 retweets 0 likes
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        1. Vertigo‏ @SamuelAFalvoII 6 Jul 2016
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          Replying to @oe1cxw @ico_TC @field_hamster

          You also scramble the 8b10b encoder output, yes? I seem to recall you had a scrambler in there somewhere.

          1 reply 0 retweets 0 likes
        2. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 6 Jul 2016
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          Replying to @SamuelAFalvoII @ico_TC @field_hamster

          scrambling happens before 8b10b encoder (after 8b10b decoder).

          3 replies 0 retweets 0 likes
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