Reply to post: Re: GPS is not this day and age

Fun fact: GPS uses 10 bits to store the week. That means it runs out... oh heck – April 6, 2019


Re: GPS is not this day and age

The ZX80 was a miracle of cost reduction. I was working in the labs of an electronics firm. One of the teams pulled one apart and "obtained" a circuit diagram. There was some head scratching understanding how it managed to work. I recall that rather than there being a couple of chips to scan the keyboard switches they used the processors upper address lines, presumably by having a bit of code that jumped to "funny" addresses that would light up the upper address lines.

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