In the vein of learning how computers work, osdev has got to be pretty high up there. It’s so much fun - it has become my hobby. I’m surprised no one else seems

In the vein of learning how computers work, osdev has got to be pretty high up there. It’s so much fun - it has become my hobby. I’m surprised no one else seems to have mentioned it. I just finished implementing a really basic network stack for my x86 kernel, including a (crappy) driver for the RTL 8139 network card. I just learned a ton about how the internet works. I learned it all in college, but there’s something different about grappling with it directly. And I’ve gotten pretty good at C in the meantime. I’ve also learned a ton about virtual memory, page tables, system calls, various hardware, how data is stored on disk, the ELF file format, how processes are loaded and executed, the x86 calling convention, a little bit of assembly code, just to name a few. Check out https://wiki.osdev.org https://wiki.osdev.org for where to start. I’m hoping to start writing some blog posts about all of this soon, to provide a resource to complement the osdev wiki. A lot of info on this is surprisingly hard to dig up.