wrote an I2C core, added some registers to access through it, plugged the bus in oh no it doesn't work after twenty minutes of headscratching i realize i didn't actually give the FPGA any clock to run on
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I've always liked Wireworld for this kind of thing. You have an implicit clock since it's a simulation, so serial data works great and you can just store bits in a loop of wire. It's beautifully simple. https://en.m.wikipedia.org/wiki/Wireworld
You can actually build a proper (not really too esoteric) computer in a reasonable amount of space. https://www.quinapalus.com/wi-index.html pic.twitter.com/MkXt53BexR
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... aaaand that reminds me of looped(?) repeater memory, implicitly clocked by the game's redstone ticks. Don't know anyone who used it, but... There was also something in the real world iirc! Vibrations down a coiled loop of wire? I think?
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there's a few of those. also density waves in mercury
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