ZXIO V2 Card with LED Expansion BoardPreviously I built a simple Input / Output board for the ZX81, tested it, identified some self induced errors then hinted that it may be worth changing designs completely. Way back in Part 1 I'd already come to the conclusion that I really shouldn't make this a simple project, so of course I went back and stared things again.Why Change Now?Didn't the last design work and only really...
