James Corbin wrote:
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The logic ICs seems like a good possibility...do you guys know of any example schematics that use this technique?

Here's a small sample circuit. It using a 74139 as an address decoder, and can be expanded to 4 input ports and 4 output ports by adding extra 574/541 chips.



The circuit has of course not been tested, but if I made any errors, I'm sure someone will report it :-)

Best regards,

Mikkel C. Simonsen