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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. Pepijn de Vos‏ @pepijndevos 16 Jun 2019
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      Replying to @ravenslofty @oe1cxw

      Yea, besides basic logic it seems a lot of muxes, registers, counters, adders are useful. Looking at some BOM: https://gigatron.io/?page_id=482  https://github.com/DutchMaker/TTL-computer/blob/master/Circuits/Schematics-PDF/TTL-Computer.pdf … For myself I'm thinking towards a stack machine, so 74161 is great I think.

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    3. Pepijn de Vos‏ @pepijndevos 16 Jun 2019
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      Replying to @ravenslofty @oe1cxw @fpga_dave

      Amazing. So you're actually modifying the compiler now? I'm going to have to revise my holiday plans maybe...

      0 replies 0 retweets 0 likes
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    8. Pepijn de Vos‏ @pepijndevos 17 Jun 2019
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      Replying to @ravenslofty @oe1cxw @fpga_dave

      I saw liberty does includes, so I think for now AC is great, and you can always expand to other sub architectures later. Really itching to play with this, but first some exams to pass.

      0 replies 0 retweets 1 like
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      Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩‏ @oe1cxw 20 Jun 2019
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      Replying to @ravenslofty @pepijndevos @fpga_dave

      Have a look at memory_bram and how it's used in the FPGA synth_* commands.

      9:21 AM - 20 Jun 2019
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        2. Pepijn de Vos‏ @pepijndevos 20 Jun 2019
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          Replying to @ravenslofty @oe1cxw @fpga_dave

          Can you elaborate? Does yosys only support two port ram? What do you mean with stall on collision and what does yosys do? I was thinking 1 port ram + 2:1 mux ~= two port ram

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        2. Pepijn de Vos‏ @pepijndevos 20 Jun 2019
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          Replying to @ravenslofty @oe1cxw @fpga_dave

          I have in my mind a picture of the Quartus bram, which has an extra flipflop or mux around the ram iirc Maybe a very basic combination of actual chips could perform the correct behaviour?

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