Unfortunately even VisualNES experiences some inaccuracies compared to real hardware. I've only personally found an issue caused by it in one game (Who Framed R

Unfortunately even VisualNES experiences some inaccuracies compared to real hardware. I've only personally found an issue caused by it in one game (Who Framed Roger Rabbit,) and the effect isn't noticeable if you're not looking for it. But it is there.