Monkey64 is an n64 emulator started from scratch that takes the psp limitations into consideration. The ultimate goal is solid n64 emulation at 30-60fps on the psp. This will not come instantly but maybe 6 months now it will be a reality. At the current time Monkey64 supports a large array of n64 homebrew / PD roms that draw to the framebuffer & commercial roms. While not all commercial roms run & the ones that do are a bit glitchy, things are improving on a daily basis.