Hi Jens On Sunday 03 December 2006 11:32, Jens Weichert wrote: > What exactly does vsync?? It synchronizes rendering of the emulated Amiga display to the refresh rate of your monitor. The point of this is to get flicker-free screen update. There are various problems in trying to do this, including broken support for doing this kind of thing in various graphics platforms and/or drivers, and the fact that virtually nobody has a monitor with 50Hz vertical refresh rate these days. Cheers, Rich