🚀 go-pugleaf

I was working at another company back in 1984 and if it wasn't us that
brought this problem to Intel's attention, I'm fairly certain we were the
first non-Intel folks to know about it.  I'd have to go back and look at
my notes for details, but it involved the NMI and INTR signals.  I seem to
recall that there is(was?) a window of time during the NMI acknowledgement
phase where, if INTR wiggles it is not noticed and gets lost.  Or maybe
it's the other way around.  Anyway, Intel provided a very simple (two
gates) circuit diagram as a hardware fix and also some suggestions for
software fixes, both of which seemed to do the trick.  I don't know if the
later steppings of the 80286 incorporate a real fix, but I presume that
they do.



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   Michael O'Donnell
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  DISCLAIMER: My opinions only coincidentally resemble those of my employer.
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