Chapter 3 of volume 1, ctrl+f for "64-bit mode", has a lot of the essentials including e.g. the stuff about zeroing out the top half of the register. https://w

Chapter 3 of volume 1, ctrl+f for "64-bit mode", has a lot of the essentials including e.g. the stuff about zeroing out the top half of the register. https://www.intel.com/content/www/us/en/developer/articles/technical/intel-sdm.html https://www.intel.com/content/www/us/en/developer/articles/t...