# This contains information about non Openpower machines The purpose is to provide comparisons with other processors - others may have done things before that are similar to what they are doing; we want to learn from them. * [x86_64 NASM Assembly Quick Reference](https://www.cs.uaf.edu/2017/fall/cs301/reference/x86_64.html) * [Wikipedia on x86_64](https://en.wikipedia.org/wiki/X86-64) * [X86-64 registers](https://blog.yossarian.net/2020/11/30/How-many-registers-does-an-x86-64-cpu-have) * [X86-64 registers](https://wiki.osdev.org/CPU_Registers_x86-64) * [X86 64 Register and Instruction Quick Start](https://wiki.cdot.senecacollege.ca/wiki/X86_64_Register_and_Instruction_Quick_Start) * [Four-Volume Set of Intel® 64 and IA-32 Architectures Software Developer’s Manuals](https://software.intel.com/content/www/us/en/develop/articles/intel-sdm.html)