Edited timing heavily to match Nintendulator exactly. I cannot find a way to pass both blargg's PPU test 6 and have Antarctic Adventure work. (I think a cycle accurate CPU is needed to have NMI occur exactly where it needs to. I'll get to it.)
Merge pull request #1 from andrew-hoffman/nintendulator-compat-timing

Edited timing heavily to match Nintendulator exactly. I cannot find a wa...