I used to use MacOS 7.5.3 on ShapeShifter 3.10 on the bvision.
It was much faster than AGA, but I got the impression there was no actual hardware graphics acceleration of any kind (blits etc.) and that only the chunky framebuffer sped things up over AGA. For example, moving a window still had visible redraw, just a lt quicker than AGA. If the blitter were used I wouldn't expect to see it at all.
Can anybody confirm this? Or ist it a 7.5.3 problem?
