More details
I'm working with the OP on this project, and want to provide some more information.
Back in the DOS/PC era, a KVM had a mechanical selector switch to toggle between two PCs. What we had hoped to find was a panel-mountable version of that (NEMA 4x); or at least something that we could solder an AB 800T switch where the desktop switch is/was.
Unfortunately, modern KVMs seem to monitor their keyboard input for the "switch" command -- something like "hold down the <CAP LOCK> while simultaneously pressing <CTRL>."
Unfortunately, our monitor is a touchscreen and there is no physical keyboard, so we can't do multiple simultaneous keypresses.
The two thin clients are on different networks, running different ArchestrA galaxies, so the have no way to pass data to each other (well, without more of an effort than the bosses will allow (validation)). But the two systems each control independent vessels that both feed into the same filling line (at different times), and the desire is to monitor/control the one that is feeding the filler at a common station.
Due to space constraints, a second monitor is out. We could possibly get a NEMA keyboard, just to give the KVM something tangible to switch by.
Another option would be to add a button to the two systems' ArchestrA screens that could send the proper signal to the KVM, but I believe the InTouch scripting language is limited as to being able to do that.
The ideal would be to find a KVM that has a physical selector rather than a logical one.
Any ideas?