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It's clear that RISC-V started as an academic exercise (albeit from a group with esteemed credentials) and they had to bolt on these hacks to make it work in in

• bigyabai 2mo ago
  ARM was also rooted in an academic exercise. A lot of the drawbacks for modern ARM PC platforms stem from the aversion to actually advanced features like SVE/SVE2 and UEFI. It's sad, but it was also wildly successful. RISC-V has already replaced ARM in highly-custom embedded spaces like Nvidia's GPU controllers, and it likely won't stop unless ARM finally changes their tune vis-a-vis licensing.
  • fidotron 2mo ago
    > ARM was also rooted in an academic exercise. Where do people get ideas like this from? Just nonsense.
    • bigyabai 2mo ago
      ARM, the ISA, is wholly rooted in academic exercises like Berkeley RISC. What do you think happened? RISC-I and RISC-II never existed, ARM means "Automated Reasoning Mechanism" and the ISA was never RISC whatsoever? Talk about nonsense, damn...
      • sehansen 2mo ago
        No, ARM means "Acorn RISC Machine" and was developed by Acorn Computers, a British computer manufacturer, because the 8-bit MOS 6502 they had based their previous designs on was obsolete, available 16-bit processors "a bit crap"[0] and available 32-bit designs too expensive. So the ARM ISA was developed by a computer manufacturer for use in their own chips in their own products, quite far from an "academic exercise". 0: https://www.youtube.com/watch?v=Hf67JYkUCHQ https://www.youtube.com/watch?v=Hf67JYkUCHQ at 7:35