First computer I played with was Siemans R330 64k core memory, 1.5M 18inch disk drives, and on bad days loaded from paper tape. Operating system was in German, and the PSU produced 60 amps at 5 volts. CPU electonics over 9 boards - not exactly a home computer but my thanks to the RAF for the introduction. Next up was the DEC PDP 11 series 2M Memory, CPU on one card (but a big one ) allowed fault finding to a bit in a regisiter. Still looking at a later model PDP 11/84 18MHz clock still providing a service with a well known ATC service provider. they were the days when you could replace a chip. never did understand how windows worked. now feeling a bit old.
Rickity