This course is pretty well known: http://pdos.csail.mit.edu/6.828/2014/xv6.html http://pdos.csail.mit.edu/6.828/2014/xv6.html It comes with a 100 page book tha

This course is pretty well known: http://pdos.csail.mit.edu/6.828/2014/xv6.html http://pdos.csail.mit.edu/6.828/2014/xv6.html It comes with a 100 page book that explains a simple UNIX-like OS.