I recently came across an article that mentioned something about Unios, an extremely simple OS that just displays Hello! or something of the sort. That's it. Ok, so it's not much of an OS, but it's a start. That's what I'd like to do as well. Just an extremely simple, boring OS that displays some text. I have no idea of how I would go about this, so this is my question:
Where can I find out more about the basics of OS design? Like I said, nothing fancy, just the very beginnings of making a PC boot with my 'OS'.