Subject: Re: Centris650 Video/NuBus Interrupts
To: John D. Smerdon <jds@smerdon.livonia.mi.us>
From: Scott Reynolds <scottr@edsi.org>
List: port-mac68k
Date: 04/25/1996 17:52:43
On Thu, 25 Apr 1996, John D. Smerdon wrote:

> If a Nubus interrupt occurs, and the source of the interrupt (i.e. video)
> is not serviced, then I will never get another Nubus interrupt (i.e. video
> or ethernet) again.  Is my understanding correct?

My experience would indicate that this is the case.  The reason you're
getting ae0 to work at all is because of the watchdog that periodically
checks to see if the kernel has missed an interrupt from the Ethernet
card.  That is, it's not using the normal Nubus interrupt mechanism.

> If it is, then I must service or disable the video interrupt before
> ethernet will ever work.

Correct.