This might be a bit of an odd question, but can anyone point me in the right direction to find info on theory of operation of a front panel? I have a z80 based computer which I built a few years ago (wire-wrapped) which uses an eprom for program storage. I would like to add a front panel (switches and lights) to it to get better aquainted with the old way of doing things. Unfortunatly, my knowledge of microprocessor-based systems post-dates the era of front panels. The eventual goal is to build a hands-on display to show how systems were bootstrapped. (without letting people abuse a 'priceless' altair or imsai) Thanks, srw