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

[Johnny Billquist <bqt%softjar.se@localhost>]

On 2023-12-26 17:15, Mouse wrote:
> >        interrupt enable  <6>     Read/write.     Cleared     by     processor
> [...]
> >                                  at IPL 14 (hex).  That is, an  interrupt  is
> >                                  requested  whenever  the function {interrupt
> >                                  enable AND ready} changes from 0 to 1.
>
> I don't, however, see any language implying that the interrupt request
> is - or isn't - rescinded if DONE or IE is cleared before the interrupt
> is taken.  I don't rescind them.  simh does.  NetBSD seems to tolerate
> either (not surprising).

Well, this whole thread started because you noted that NetBSD does in 
fact not tolerate your implementation under some circumstances...

  Johnny

--
Johnny Billquist                  || "I'm on a bus
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