At 10:22 �� 19/2/2002 -0500, you wrote: > >>> Well, there is just no way to avoid flickering. On fast machines the > >>> possibility that flicker appears gets smaller but it's never zero. > > >> I slightly disagree. Not much, just a little bit. > >> simply make the program aware of that interrupt... > >No interrupt. Well, actually, yes - only on original QL. And two screen >areas to do double buffering. > > >(SCR0 and SCR1) and Auroras have 3 > >Actually, they don't. They only have the same two. The third area is really >a collective area which holds SCR0, SCR1 and the rest of the bitmap up to >1024x960 in mode 4. In it, SCR0 and SCR1 are actually side by side at the >top! I originally thought of using the screen flip bit to implement >swapping of the two screen halves (top and bottom) in the Aurora high-res >mode. That way, any MODE 4 or 8 resolution below 480 vertical could become >two screens but I disabled that option in the production version, because >it does not have much use unless it does something for 256 and 16 colors, >and it doesn't - in those two modes the screen would be limited to 240 >vertically, and there is no such mode on the QL. In theory, this could >actually be extended to 256 and the flip function could be reintroduced but >it would hardly be usefull without a retrace interrupt.
My bad... however that's what happens when you DON'T HAVE THE MANUAAAALLLLL (hehehe get the hint???? ';-))) > >(You hear that Nasta? Put it in the pipeline for Aurora II). > >It's already there. Along with on-fly 24 to 16 bit color conversion, and >maybe some other goodies. With masking out the excessive bits I presume??? BTW: Which bit organization will you maintain? QPC or Qx0 style (or PC style?) (Or something else?) > >> I don't know how easy it is to move the start of screen > >> memory on the QL and derivitives (on the vanilla QL it's prolly > >> impossible) but hey, no problem - we'll find a way ;) > >Actually, it is ONLY possible on the original and Aurora (and possibly >Q40/60) when emulating original QL mode, but you only have a choice between >$20000 and $28000. >By the looks of it, Aurora II will get 4M of video RAM so a movable screen >start address for multiple buffers could be a benefit. Still, do not expect >it to be moved completely freely, but we'll see. Well how about some extra logic (kinda of a graphics co-pro) to allow for 3D and other goodies (Hey it's not in production yet and I am allowed to dream am I not? :-))) Phoebus P.S. Nasta I will be sending you an email soon re: the hot-swap adapters
