From owner-freebsd-hardware  Wed Apr 19 00:19:01 1995
Return-Path: hardware-owner
Received: (from majordom@localhost)
          by freefall.cdrom.com (8.6.10/8.6.6) id AAA09141
          for hardware-outgoing; Wed, 19 Apr 1995 00:19:01 -0700
Received: from alpha.xerox.com (alpha.Xerox.COM [13.1.64.93])
          by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id AAA09135
          for <freebsd-hardware@freebsd.org>; Wed, 19 Apr 1995 00:19:00 -0700
Received: from crevenia.parc.xerox.com ([13.2.116.11]) by alpha.xerox.com with SMTP id <14511(5)>; Wed, 19 Apr 1995 00:18:22 PDT
Received: by crevenia.parc.xerox.com id <49864>; Wed, 19 Apr 1995 00:18:12 -0700
From: Bill Fenner <fenner@parc.xerox.com>
To: freebsd-hardware@FreeBSD.org
Subject: PCI plug-n-play on Intel Premiere Baby II?
Cc: fenner@parc.xerox.com
Message-Id: <95Apr19.001812pdt.49864@crevenia.parc.xerox.com>
Date: Wed, 19 Apr 1995 00:18:05 PDT
Sender: hardware-owner@FreeBSD.org
Precedence: bulk

I just bought joe random PCI ethernet card, with a DEC 21040 chip on it.
I already had an NCR 53810 with a "PCI interrupt jumper" on it, which
allows the selection of PCI interrupt A through D.

The NCR was jumpered to PCI interrupt A.  When I plugged the ethernet card
in, they got probed as follows:

de0 <Digital DC21040 Ethernet> int a irq 9 on pci0:6
        reg20: virtual=0xf2925000 physical=0xc0000000
ncr0 <ncr 53c810 scsi> int a irq 9 on pci0:14
        reg20: virtual=0xf2926000 physical=0xc0001000

The SCSI probe hung while trying to scan the bus.  Not horribly surprising.

I changed the jumper on the NCR card to its interrupt B position.  When I
rebooted with this configuration, the probes looked *the*same* but the
SCSI probe no longer hung.

Any ideas what might be going on, or what I can do to make sure that these
cards aren't going to interfere with each other when I start using the
machine more heavily?

Thanks,
  Bill