Ignore the doomsayers.
I have only ever owned 1 KVM switch.
It works perfectly sharing my 1 NEC MultiSync 75 Monitor + 1 PS/2 laser mouse + 1 PS/2 keyboard between my A1200T + BGCPC.
My A1200T in Elbox PowerTower came with PS/2 Keyboard support when I bought it. I then added a Mr. Mysza PS/2 -> Amiga mouse adapter.
KVM switch is one of the best pieces of hardware I ever bought for my Amiga! I wish somone had told me about them before!
