lkml.org 
[lkml]   [2004]   [Feb]   [27]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateSat, 28 Feb 2004 03:42:05 +0800
From"Michael Frank" <>
SubjectRe: Why no interrupt priorities?
On Fri, 27 Feb 2004 13:42:12 -0500 (EST), Richard B. Johnson <root@chaos.analogic.com> wrote:

>
> In the early IBM/AT, there was a port to which a user of
> a shared "edge" interrupt could write. If the interrupt
> line was still asserted, this would generate another edge.
>
> This meant that any ISR needed to know about other users
> of the same interrupt. This is probably why it didn't
> catch on.

Oops, never seen that in the circuit diagrams. Was that an internal prototype?

Regards
Michael

Ooops2 sorry for priv msg, time to have a nap....
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2005-03-22 14:01    [W:0.676 / U:0.020 seconds]
©2003-2008 Jasper Spaans