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Sat Nov 3 10:12:20 CET 2018

Tradeoff: blocking read vs. exiplicit bit wait

Either reserve a address for every bit, or add a new instruction to
wait for a specific bit.  This is just a multiplexer.

Return value is wasted, but does it matter?  Otherwise 2-op is needed,
which adds more wires.

Not worth it.






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