Line scrolling up

[Avinitlarge]

I have had a problem with mame ever since I started back in 2001.

On Horizontal scrolling games, I get a line that scrolls up the screen every few seconds. It has happened with every version of mame, Computer and that I have used. I have started building my cab and it still does it with that. It is more noticable on Pacland. It has been doing my head in for 8 years now, I need to get to the bottom of it. Any ideas??

[u_rebelscum]

You are seeing "tearing".  The game originally refreshed at a rate that doesn't match your monitor's.  The line you're seeing is where the game starts drawing the next screen.

Enable triple buffering (-triplebuffer in mame.ini).  You can instead enable videosync (-waitvsync in mame.ini).  Note that both of these could effect sound, and the latter can slow down emunlation a lot (depending on game * computer, of course.