My Dad had one of those calculators he built from a kit. I remember it had a great bug if you divided by 0. It would go mad for a moment then start counting ve

My Dad had one of those calculators he built from a kit. I remember it had a great bug if you divided by 0. It would go mad for a moment then start counting very quickly on the screen. My time spent with the calculator was doing that, and trying to make sums which came up with rude words when held upside down! (I was too young to appreciate the trig features!) The old man build lots of Sinclair kits including the watch, and it was the ZX80 that got me into computing. That took a long time for him to make it work as the PCB had a cracked track. Happy days and thanks for all the good memories Mr Sinclair (as we always used to call him in our house!).