[timf]

If you want to get into architecture in its own right, Hennessy/Patterson. But I think a far better book on the subject for programmers is "Computer Systems: A Programmer's Perspective."

This is a textbook out of Carnegie Mellon that I was exposed to in grad school. It goes into all kinds of details of processor architecture, memory, I/O, assembly programming, etc. while staying focused on its audience of a systems programmer in C. It's wonderful.

http://www.amazon.com/Computer-Systems-Programmers-Perspecti...

[alexgartrell]

Corresponding Lectures: http://www.cs.cmu.edu/~213/schedule.html