I would recommend the CS 61C course videos from Berkeley: http://www.youtube.com/playlist?list=PL01C2A0DE46A54CA9 http://www.youtube.com/playlist?list=PL01C2A0D

I would recommend the CS 61C course videos from Berkeley: http://www.youtube.com/playlist?list=PL01C2A0DE46A54CA9 http://www.youtube.com/playlist?list=PL01C2A0DE46A54CA9 It uses MIPS assembly, which you can run on a simulator. I don't think many machine architecture classes teach x86 because it's more complex. The MIPS knowledge from that course has translated easily to x86 in my tiny experience of peering into my compiler's assembly output.