Klunky Nibble to Hex 7-Segment Display Logic

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I've been learning about proper low level stuff like how to build CPU's and simple computers from the ground up using logic gates. This evenings playtime was a naive - ie without any boolean simplification - implementation of a nibble (4-bit number) to hex display using a 7 segment display.

It's pretty klunky as it's completely un-optimised, but it does work...

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