Which part troubles you? A project like this encompasses many areas of computer science from compiler design to kernel programming. If you want to get started

Which part troubles you? A project like this encompasses many areas of computer science from compiler design to kernel programming. If you want to get started with doing bare metal stuff, I quite like this article: http://balau82.wordpress.com/2010/02/28/hello-world-for-bare-metal-arm-using-qemu/ http://balau82.wordpress.com/2010/02/28/hello-world-for-bare... It uses ARM so you don't have to worry about all the x86 legacy cruft.