> The only one which is critical is E.  RS and R/W can flail
> away with reckless abandon all day long, so long is E isn't
> strobed

True, with the proviso that you don't want any interference
to RS and/or R/W from an unpredictable key press at the
time E is strobed, so you'd have to be careful that the i/o
conditions are checked, eg disabling as much as possible
the s/w's k/b functions, before doing so.

But we agree that a h/w solution is probably more sensible
than what could turn out to be a fruitless academic exercise

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