Here's a basic, sub-$40 HDMI 2.1 switch, that's MiSTer compatible, as well as the OSSC, RetroTINK 4K & more. It's unfortunately not PS3-compatible, however it seemed to pass CEC control, which is a cool bonus. If you were looking for a cheap switch for both retro and modern devices up to 4K120, or 8K60, definitely consider this one. Here's an Amazon paid affiliate link to the exact one I purchased: https://retrorgb.link/rooful4x1hdmi21