You guys might know. I've hunted around online, only thing I can find is how to run two monitors on one computer...already knew that. But, can you run two computers on one monitor? Some kind of adapter maybe?
Many monitors have multiple inputs, like one HDMI, one Displayport, one DVI... connect one computer to each (there are adapters) and change from monitor menu. That's it. You will need two sets of mouse and keyboard tho, unless you use KVM or use a special software to share mouse/kb between computers.
I want to share a monitor so that on occasion I can use an XP computer that has a scanner interfaced with it that won't work with Win 8.1. I was ready to purchase what I thought was a simple $7.99 mechanical A/B switch but some reviewers are reporting resolution resetting problems. I don't understand why a computer would recognize a manual switch instead of the monitor.
I don't switch it very often so I may just get an additional monitor cable and a female to female VGA connector for easier access and just switch cables manually.
I used to use Synergy as a software KVM back when I was space limited. Not sure if they have a free version anymore. But now that I have the desk space, I don't bother. It and a few other software KVM's work over the network. So if you do have your PC's networked, search the google for "free software KVM". Sharemouse & LiteManager are two that I can think of off the top of my head.
I've tried several KVM switches over the years. IMHO, the mechanical switches work better than the electronic switches that use a hotkey combination to switch devices. All the electronic versions I tried failed in two to four years.
I have one set up with two PCs sharing a single keyboard, video, and mouse (KVM).
VGA simply refers to the connection. You are not limited to VGA resolution. The only issue I've seen is that you may have to set the monitor's resolution manually in Windows because Windows tends to see the KVM device, rather than the monitor.