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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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    1. andreasdotorg‏ @andreasdotorg 1 Jan 2018
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      @oe1cxw Can you recommend an FPGA dev board that can run a RISC-V CPU with end-to-end Open Source synthesis?

      1 reply 0 retweets 2 likes
    2. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 1 Jan 2018
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      Replying to @andreasdotorg

      Any iCE40 8K (or 4K) board, such as the lattice hx8k breakout board, the icoboard, or icezero. Ice40 Up5k boards also work (we recently added support for ice40 UltraPlus to icestorm).

      2 replies 0 retweets 1 like
    3. andreasdotorg‏ @andreasdotorg 1 Jan 2018
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      Replying to @oe1cxw

      Excellent, thanks! I assume this implies picoRV32 fits in an iCE40?

      2 replies 0 retweets 1 like
    4. Bruce Hoult‏ @BruceHoult 1 Jan 2018
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      Replying to @andreasdotorg @oe1cxw

      Doesn’t that one only need 300 or so LUTs? A fully featured RV32IMAC is maybe 2000 or so LUTs I think.

      1 reply 0 retweets 1 like
    5. Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 2 Jan 2018
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      Replying to @BruceHoult @andreasdotorg

      s/300/750/. And that is on Xilinx 7 series. On Lattice iCE40 it is closer to 1500 minimum size.

      1 reply 0 retweets 1 like
    6. Bruce Hoult‏ @BruceHoult 2 Jan 2018
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      Replying to @oe1cxw @andreasdotorg

      Hmm I’m sure something uses 300. @jangray’s cores?

      1 reply 0 retweets 0 likes
      Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 2 Jan 2018
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      Replying to @BruceHoult @andreasdotorg @jangray

      I think the last number for GRVI that I have seen was 350 LUTs. So that would at least be in the right neighborhood.

      6:32 AM - 2 Jan 2018
      1 reply 0 retweets 0 likes
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        1. Bruce Hoult‏ @BruceHoult 2 Jan 2018
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          Replying to @oe1cxw @andreasdotorg @jangray

          That’s clearly a very minimal processor. Just RV32I. No atomics, no multiply, no compressed.

          1 reply 0 retweets 0 likes
        2. Jan Gray‏ @jangray 2 Jan 2018
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          Replying to @BruceHoult @oe1cxw @andreasdotorg

          GRVI does MUL* and LR/SC. No compressed.

          1 reply 0 retweets 1 like
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