Okay, I've tried compiling the two demos that come with NESASM (COLOR and JUNKDEMO) using NESASM 2.51. Whenever I run COLOR in FCE Ultra, Nintendulator, or Nestopia, I get the infamous "grey screen." Whenever I run JUNKDEMO, I also get the grey screen, but I do get some music with it to varying degrees. FCE Ultra plays it perfectly, Nintendulator does a good job except when a frame is skipped (there's a short buzz) and Nestopia screws it up a lot. So what's going on? How can I compile my own programs with NESASM if it can't compile the ones that are included with it?