Writing an operating system kernel from scratch

nice!

i love how accessible riscv isa is, the docs are amazing, there are tons of examples, and tons of emulators, the uncompressed machine code is quite readable.

i am writing a book for my daughter and am also working on a small os with forth and timesharing https://punkx.org/projekt0/book/part1/os.html and i dont think i could've done it on x86, learning both forth and riscv assembly on the way, its super fun.

honestly if you ever wanted to make a toy os from scratch there is no better time to start than now (besides maybe 1980), get a cheap riscv like rp2350 and just upload the relevant sections of the docs to claude and it will help you if you get stuck.

I just checked the prices for my country and I’m surprised how cheap this is. I’m 90% sure I’m buying one just to play around with.

and the datasheet is amazing https://datasheets.raspberrypi.com/rp2350/rp2350-datasheet.p...

there is an issue that language models have seen enormous amounts of rp2040 code and docs, and it they get properly confused a lot, so you should just pdf print relevant pages and use them in-context.