Why the heck would someone build a computer using obsolete technology when you got computers that are hundreds of millions times faster? Firstly because I always wanted to know how computers work. In the past, I have built simple adding machines, clocks and even tried to build a Z80 computer from scratch (which was a failure only because I got the schematics from 1979~1985 “Nuova Elettronica” magazines, and I couldn’t find many of the parts for sale, mostly because they were no longer fabricated). And secondly, for fun. Having such a monumental task in my hands, something to work for a lot of time and “keep my mind from wandering”. Also, having the experience of listening what a computer is thinking, is something really amazing.