I think that AMD Developer Guides & Manuals [1] are very good resources for x86_64 System Programming (better than Intel Manuals). They are better explained and

I think that AMD Developer Guides & Manuals [1] are very good resources for x86_64 System Programming (better than Intel Manuals). They are better explained and focus on x86_64 arch. [1]: http://developer.amd.com/resources/documentation-articles/developer-guides-manuals/ http://developer.amd.com/resources/documentation-articles/de...