unfortunately there’s no way to detect vertical blanking Oh, but there are ways ... https://web.archive.org/web/20151021120320/http://hoop-la.ca/apple2/2015/v

unfortunately there’s no way to detect vertical blanking Oh, but there are ways ... https://web.archive.org/web/20151021120320/http://hoop-la.ca/apple2/2015/vbl/ https://web.archive.org/web/20151021120320/http://hoop-la.ca...