Re: KA630: how does console I/O actually work?
Johnny Billquist <[email protected]>
| Newsgroups | gmane.os.netbsd.ports.vax |
|---|---|
| Message-ID | <[email protected]> |
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 is - or isn't - rescinded if DONE or IE is cleared before the interrupt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
|| on a psychedelic trip
email: [email protected] || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol