GET_HEAP
mi = GET_HEAP(struct mode_info, 1);
video_bios.modes = GET_HEAP(struct mode_info, 0);
video_vesa.modes = GET_HEAP(struct mode_info, 0);
mi = GET_HEAP(struct mode_info, 1);
mi = GET_HEAP(struct mode_info, 1);
saved.data = GET_HEAP(u16, saved.x*saved.y);