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But I'm posing a pretty open question: how can someone begin contributing to RISC-V? (compilers, toolchains, documentation, testing, etc)
EDIT: There's this article, but its over 2 years old: https://www.sifive.com/blog/all-aboard-part-10-how-to-contribute-to-the-risc-v-software-ecosystem
A pure markdown based solution isn't really ideal. I like the rich text formatting of OneNote and the ability to insert media, draw over it, etc.