@gbraad Thanks for sharing, we did learn about interfacing a MUX ic to the 8086 during CS course, but all theory not like this, he explains it very nicely.

@anjannath using a 8255 PPI or UART 8250/51 is close. I developed against the ISA and PCI bus when studying electronics ... but the 6502 is still simple and fun. got several WDC65C02s here (and the newer versions) and consider a breadboard setup for teaching my kids... although too young now.

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