Serial Keyboard Switches
Originally conceived to connect various users to one PC, in the days when PCs were few and expensive. These switches also work the other way, connecting several computers to one keyboard and mouse. At an early stage of my project, this is what I did. I even cascaded two 4-way switche (with the hepl of one 2-way switch) to gain access to 8 PCs through one single keyboard. For more details, see the Keyboard Selector Panel page.
The problem: Mechanical keyboard switches only work well with Win98. This OS happily recognizes keyboards at any time, even if they are connected after the PC has been booted. As time progressed, I upgraded most of the machines in my cockpit to Win XP, which “sees” a keyboard only if it is connected at boot time. In order to use one keyboard for all my machines, I had to set the keyboard selector switch to PC-1 and only then start PC-1. This process had to be repeated for all remaining machines. Tidious, time consuming and error-prone. Certainly NOT funny!
Lately a new type of auto-sensing switches has become available. They trick XP into believing that mouse and keyboard are connected even when they actually are not. A nice solution, but these devices are rather expensive. Also, because of their very nature, keyboard switches always require lots of cables.