Hi, > > Syncing has nothing to do with blitting. These are seperate > > 'functions' > > Although GF256 and higher can do this explicitly inside the blit > > operations as well (but I don't use that, yet (maybe later if not > > much > > speed penalty)) > > Looks like I will never understand this 'retrace' thing. :-)) > > If one wants to _copy_ a surface from main mem to the visible frame > buffer, how can he do that if the PCI/AGP bus is so slow. How would > that > image/surface would appear at once and not in pieces? > > I can understand why _blitting_ can be done during a retrace, > because > video memory is very fast. Well, if you are going to software-copy during retrace: you might be right. You cannot guarantee you will finish before the screen starts to redraw. IT depends on resolution (timing wise), refreshrate, colordepth, CPU speed, busspeed... > Where am I wrong? You just have to differentiate between practice and theory ;-) Rudolf.