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Date:      Sun, 03 Jun 2001 06:14:28 +0200
From:      Tor.Egge@fast.no
To:        lars@odin-corporation.com
Cc:        smp@FreeBSD.ORG
Subject:   Re: shared interrupt handling
Message-ID:  <200106030414.GAA30030@midten.fast.no>
In-Reply-To: Your message of "Sat, 02 Jun 2001 13:22:34 -0500"
References:  <3B192EEA.68CE9AF1@odin-corporation.com>

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> Hi,
> 
> I have noticed that my mptable (ASUS bios 1013) on my p2b-ds always
> indicate that the interrupt source bus is ISA, even  for the PCI device.
> This happens also when one reserves a couple of irqs for ISA in the
> bios. When you do this, a couple of the PCI cards end up sharing
> interrupt, which typically doesn't seem to work.

Enable the MPS 1.4 support in your BIOS.  I do that on my development
machine (Asus P2B-DS, bios 1012B).  When the MPS 1.4 support is
disabled, the BIOS presents an MPS 1.1 table that overloads all PCI
interrupts onto the ISA bus.

- Tor Egge

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