I (loganmc10) have decided to focus my future efforts on a new N64 emulator (https://github.com/gopher64/gopher64). Please try it out! This project has been archived and development has stopped. If Gopher64 doesn't have a feature that you are interested in, RMG is another very good emulator based on mupen64plus.
https://github.com/simple64/simple64/wiki
Check the Wiki page Simple64 FAQ for CPU and GPU requirements. Do this before asking for help!