Yeah on the c64, the vic2 video chip could gen an interrupt at a configurable vertical line. So many people used different graphics modes for each band of the

Yeah on the c64, the vic2 video chip could gen an interrupt at a configurable vertical line. So many people used different graphics modes for each band of the screen, Amiga went further and facilitated it. It was fun mixing interlaced (and therefore shaky on a bad monitor) modes with stable modes.