With Stella 6.1 we introduced a new kind of filtering (QIS). This became necessary because we corrected the way Stella emulates different vertical resolutions (e.g. NTSC vs PAL). There is no integer vertical scaling anymore, a scanline's height has become variable now. Unfortunately it turned out, that the R77 is too slow to handle TV effects combined with QIS.    We also removed the independent NTSC and PAL aspect ration settings and replaced them with V-Size. This allows you to fine