Most monitors with KVM switches have a USB-B port that upstreams to one computer. This allows the other downstream USB-A ...
Today, KVM switchers are a bit more complicated than a simple rotary switch ... a keyboard, mouse, and monitor between boxes, it’s exactly what you need. First off, the HDMI switching.
That’s not a big deal since you can simply use a KVM to connect one Keyboard/Video/Mouse terminal up to all ... which was little more than an AV-style switch. The transition of keyboards to ...