Cool, I worked on the same quiz bowl apparatus as a pet project around 20 years later. I remember the available commercial options ca. 1998, generally made by

Cool, I worked on the same quiz bowl apparatus as a pet project around 20 years later. I remember the available commercial options ca. 1998, generally made by small shops. One popular one must have been a similar S-R latch design, and another was probably based on a microcontroller, as it tested the lights and buzzer when it was turned on. I am impressed with arbitrary daisy chaining. Mine was limited to 4 per side, but had a shared cable.