Yeah I believe Minix is actually a complete rewrite intended to be more useful in the real world than just a teaching toy (and at that it has been successful).

Yeah I believe Minix is actually a complete rewrite intended to be more useful in the real world than just a teaching toy (and at that it has been successful). I can't imagine enjoying reading the source code apendix from a book as much as you seemed to have done :D But I did learn a lot from the main text of the book. Pretty hard for me to dive into even a simple hobbyist OS and figure things out from scratch.