lilith

I always plug this when given the chance: https://github.com/ffwff/lilith Full multi tasking, POSIX compliant yadda-yadda actual OS written in Crystal. The author was also apparently in high school at the time.

Pascal, Zig, V and possibly Crystal. Or Das C although arguably that is a subset of D. V isn't anywhere near finish. The closest thing should be Zig. But that is far from finish as well. Crystal is more like Go than C. But I mean someone wrote a OS [1] using Crystal in her spare time. Or just plan old Pascal. I mean if you are looking for simplicity like C and compiled to machine code you virtually ruled out 95% of all programming languages. Other languages like Lua is simple. But certainly dont fit the bill. [1] https://github.com/ffwff/lilith

Lilith: x86-64 OS written in Crystal https://github.com/ffwff/lilith

I'm really quite enchanted with Crystal. There are some amazing projects written in it including an alternate youtube frontend https://github.com/iv-org/invidious and an OS written in Crystal https://github.com/ffwff/lilith

I don't know of any specifically made for teaching, but there is biscuit made in Go[0] and Lilith made in Crystal[1]. [0] https://pdos.csail.mit.edu/projects/biscuit.html [1] https://github.com/ffwff/lilith

I sort of felt compelled to post this. An OS written in Crystal. [1] Which got quite a bit of discussion last time it was on HN [2] . I know this may sounds strange but I would not be surprised once Crystal reached 1.0 there will be a Ruby implementation written in Crystal. [1] https://github.com/ffwff/lilith [2] https://news.ycombinator.com/item?id=21860713

+1 For crystal. I always post this project, an OS written in it from scratch, as it is one of the most impressive things I’ve seen on HN https://github.com/ffwff/lilith

Indeed. I don't know much about this language, but the x86-64 OS written from scratch in crystal was one of the most impressive things I've seen during my time on HN [1]. In the thread about it [2], it was mentioned that the author was in high school. [1] https://github.com/ffwff/lilith [2] https://news.ycombinator.com/item?id=21860713

Crystal is really nice! Cloning Ruby syntax but making it prettier is probably one of the smartest language design decisions that have happened in a long time. It's definitely gotten further on my radar in the past year or so, though I remember reading this a few years ago and finding it pretty cool then, too: https://blog.codeship.com/an-introduction-to-crystal-fast-as... Relevant HN thread: https://news.ycombinator.com/item?id=12223395 Seeing Lilith in (what was, I think) December was what really alerted me to the fact that it had come along so far, I had mostly thought it was dead before. Lilith: https://github.com/ffwff/lilith Relevant HN thread on Lilith: https://news.ycombinator.com/item?id=21860713

Interesting choice of syscalls: https://github.com/ffwff/lilith/blob/master/userspace/librar.... No fork; instead it seems to implement spawnv.

Wow. Preemptive multitasking, graphical window management, POSIX-like, in a programming language that to my knowledge it hasn't yet been done in... and in just several months of work. There's no smoke and mirrors as far as I can tell. I dug back to the initial commit: https://github.com/ffwff/lilith/commit/c9fa1053dc6a22d630ee6... - and it's just bootstrapping to VGA. Very well done, and inspiring. Makes me want to try OS dev again.