André Pfeiffer (Ratte) developed a automatic monitor switch for the Amiga computer. The switch is a "Do It Yourself" project, but there is a very good tutorial on how to assemble the monitor switch. The monitor switch can be used with the Amiga 1200, 3000 and 4000 computers with a IndivisionAGA with CybervisionPPC or BVision. For all the details you can visit the a1k.org web page.