VirtuaNES inverted colors?

[Jakobud]

I made a cabinet for a friend several years ago. I had MAME on it and a bunch of console emulators. For Nintendo I had VirtuaNES installed and setup. Recently he contacted me and said that when he started up a NES game, the colors of the game were inverted. Like I guess the entire color palette is inverted.

I'm looking through the VirtuaNES options and config and everything I can't find any settings or hotkeys for inverting colors. I have no idea what he did or how he did it or how to fix it. He lives in a different state so I have to try to solve this problem remotely.

Has anyone else seen this before for VirtuaNES?

[Howard_Casto]

I'm not sure what the problem is as it pertains to virtuanes specifically, but it sounds like he's playing the games in arcade mode.   The nes and pc10/vs arcade games used different PPUs and therefore had totally different color palettes. 

Of course this may not be the problem at all, I'm just guessing, but I know if you try to run a NES game on a vs emulator the colors are inverted.