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From: peppe@unipg.it (G. Vitillaro)
Newsgroups: comp.os.linux.hardware,comp.unix.bsd.freebsd.misc,comp.sys.intel
Subject: Intel Plato Premiere PCI/II and edge/level triggered IRQs
Date: 6 May 1995 13:41:15 +0200
Organization: Centro di Calcolo - Universita' di Perugia
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Sender: peppe@egeo.unipg.it
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I have problem with SCSI timeouts under FreeBSD 2.0
SNAP950412 in a system composed basically of an
Intel Plato P90 Premier PCI II (Neptune chipset)
and a PCI Adaptec 2940.
For what I read until now under freebsd,linux groups
seems that the MB I'm testing use edge-triggered IRQ
rather than level-sensitive on the PCI bus.
This is confirmed too from an online manual for
this board I found on gatekeeper.dec.com. It claims
that the version of BIOS I use now setup the card for edge-triggerd IRQ.
This was not true evidentily for previous versions.
This seems confirmed too from the fact that using
FreeBSD-current aix7xxxx drivers (that use by default
edge-trigger IRQS) the system behave correctly.
Questions:
(1) Anyone may confirm this is correct for this
particular MB?
(2) Are there any way to setup the MB for use
level-sensitive IRQS?
(3) In the case answer to question (2) is "impossible"
it would be "safe" to buy a mother in this conditions?
E-mail answers are preferred, Thanks, Peppe.
--
Giuseppe Vitillaro - IBM SEMEA | E-Mail : peppe@unipg.it
University of Perugia Italy | 06124 Perugia Phone:+39.75.585-2799
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All comments/opinions are mine and don't represent those of IBM