[_Donny]

I used BareMetal and Pure64 as a source of inspiration and knowledge while writing an OS as a student. It is simple and well written.

I miss the days of reading AMD64 manuals and directly interacting with my hardware through assembly, and I want to get back to it.

What would be a good entry-point to OS development nowadays? I have the "FYSOS: The System Core" by Benjamin David Lunt. While I love the series, I wonder what other alternatives there are, perhaps supporting ARM?

[anta40]

I still stick with xv6: https://github.com/mit-pdos/xv6-public

- It's not only a kernel, but also have user space

- Code is pretty compact and well documented, in general can be understood in a few days

- No need to spend hours to custom build gcc. Just use the one provided by the distro package manager

The x86 version isn't mantained anymore. They switched to RISC-V.

[notorandit]

I would give Minix3 a try.

[anta40]

No doubt it's more feature complete than xv6. Probably will try it on weekend.

[notorandit]

Don't forget to contact AST in case you get some interest.

[xd]

I used https://wiki.osdev.org/Resources back it the day and it looks like it's still alive and well!

[sunday_serif]

I particularly like the mit 6.S081 operating systems course [1].

The course has you make useful extensions to a reimplementation of the XV6 kernel in RISC-V.

This course really helped me start to understand how an OS works and what the hardware software interface really is.

[1] https://pdos.csail.mit.edu/6.828/2020/ — linking to the 2020 class because all of the lectures were uploaded to YouTube to accommodate remote work during the thick of Covid.