Re: KA630: how does console I/O actually work?

[Mouse <mouse%Rodents-Montreal.ORG@localhost>]

>> Hm, I think I see what you mean.  This is feeling unpleasantly
>> complex.
> I actually think it's rather simple.  What is feeling so complex
> about it?

It feels like a cross between edge-triggered and level-triggered.

I have now switched back to a pure DONE&IE (RX) or RDY&IE (TX)
criterion for SLU interrupts.  I find that the ROM selftest is happy
but that NetBSD falls into a livelock taking an apparently-endless
stream of TX interrupts.

I don't yet know more.

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