Looks like there's a work-in-progress NES emulator based on cl-6502 in there as well: https://github.com/redline6561/famiclom
Related (with screenshot!): http://blog.redlinernotes.com/posts/So-Close-and-Yet-So-Far....
If I can wind up with a NES emulator that is "fast enough" and 2500 lines of code instead of 75,000 (Fceux) or 150,000 (Nestopia) then I'll be happy.