linux-insides VS Bochs

Linux kernel and its insides https://0xax.gitbooks.io/linux-insides/content/index.html

I liked this: https://0xax.gitbooks.io/linux-insides/content/index.html

It explains the boot process from the cpu initialization to a the end of the linux kernel initialization.

Are you talking about that - https://github.com/0xAX/linux-insides ? The link you added doe not work for me. I think there is a connection between the two. I don't mind contributing to that.

Linux kernel and its insides — kernel insides, and other low-level subject matter

https://github.com/0xAX/linux-insides and https://linux-kernel-labs.github.io/refs/heads/master/labs/introduction.html are also good places to start. Do check them out.

I am referencing the book https://github.com/0xAX/linux-insides/blob/master/Booting/linux-bootstrap-1.md

The following is a pretty decent historical page about the pre-(U)EFI MBR (Master Boot Record) boot process:

https://thestarman.pcministry.com/asm/mbr/STDMBR.htm

Note that EFI/UEFI -- occurred much later in time than MBR...

Related: https://en.wikipedia.org/wiki/Master_boot_record

You might also wish to check out some emulators, most notably Bochs (https://bochs.sourceforge.io/) and QEMU (https://www.qemu.org/) because they simulate the boot process, and if you're in their debuggers, you should be able to inspect that process step by step -- but also more generally emulators for other machines/platforms/architectures (https://en.wikipedia.org/wiki/List_of_computer_system_emulat...) -- because in general, most of those emulators should simulate the given machine/platform/architecture's boot process...

With both of those you can make some really nice DOS programs. Which you can then run in bochs (not virtualized, but an emulator. Close enough :) ).

Just took a look myself, check this out: