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Z80 Computer Free-Run

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Uploaded on Apr 11, 2015

First tests with a Z80 microprocessor. Here I have all the data pins pulled low, so it's in free-run counting up addresses from 0x00 on start-up.

The Arduino is driving the 7-segment displays by way of a pair of '164 shift registers because the decoders I had on hand don't really support hexadecimal.

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