So I've been planning a new build, I found one of those single-board computers that is meant as an upgrade to an original system, and was thinking of doing a 1989/1999 build. The SBC will take up to any socket 7 cpu up to a K6-3 500. I was thinking of doing a high-end 286 with this dropped in one of the ISA slots. My question is: do you think there is any good way to run both at the same time, and be able to switch back and forth between the two systems? My guess is that at a minimum I'd need a power supply beefy enough to handle both a 286 mainboard and the K6 on the SBC, and 2 ATX power supply headers (with an AT adapter on one). My idea is either have both active at the same time and use a KVM to switch between the 2, or have it so that flipping an external switch will make one or the other active. Sound cool? I just don't know what would be a good way to do the wiring so that I don't fry one or both of the systems.

The thinking behind this build is to showcase the huge progress in that 10 year period, and also to have a nicely consolidated system where I could drop multiple socket 7 cpus in very easily, if I wanted to swap them out (say, maybe keep a pentium 120, 233 and the K6-500 on hand to be able to "shift gears" so to speak ---- or maybe this will be more of a pain than it is worth).