From the ground up? Well, there's always the source: http://www.intel.com/content/www/us/en/processors/architectures-software-developer-manuals.html http://www

From the ground up? Well, there's always the source: http://www.intel.com/content/www/us/en/processors/architectures-software-developer-manuals.html http://www.intel.com/content/www/us/en/processors/architectu... For learning assembly? For MASM I enjoyed this book years ago: http://www.amazon.com/Assembly-Language-Intel-Based-Computers-5th/dp/0132383101/ http://www.amazon.com/Assembly-Language-Intel-Based-Computer... For GAS something like this might be more appropriate: http://www.amazon.com/Professional-Assembly-Language-Richard-Blum/dp/0764579010/ref=sr_1_4?s=books&ie=UTF8&qid=1381333909&sr=1-4&keywords=assembly+language http://www.amazon.com/Professional-Assembly-Language-Richard... Patterson & Hennessy is used a lot in colleges to teach low-level architecture and assembly: http://www.amazon.com/Computer-Architecture-Fifth-Quantitative-Approach/dp/012383872X/ http://www.amazon.com/Computer-Architecture-Fifth-Quantitati...