Have you looked at http://www.nand2tetris.org/ http://www.nand2tetris.org/ and the book The Elements of Computing Systems, MIT Press, By Noam Nisan and Shimon S

Have you looked at http://www.nand2tetris.org/ http://www.nand2tetris.org/ and the book The Elements of Computing Systems, MIT Press, By Noam Nisan and Shimon Schocken? "The site contains all the software tools and project materials necessary to build a general-purpose computer system from the ground up. We also provide a set of lectures designed to support a typical course on the subject."