Subject: Re: How do I fix "siop0: couldn't map interrupt" on AlphaServer 1000A?
To: Paul Mather <>
From: Manuel Bouyer <>
List: port-alpha
Date: 05/27/2003 15:12:14
On Mon, May 26, 2003 at 02:43:38PM -0400, Paul Mather wrote:
> Well, I finally got some time to power down and open up the
> AlphaServer 1000A.  The non-working SCSI card was, indeed, plugged
> into a slot on PCI bus 2 (as it is designated on the motherboard).
> Because PCI bus 1 was full, I ended up having to swap the SCSI card
> with one of the two network cards.
> So, now I have two working siop devices (hooray!:), but now only one
> working network device (boo:), and so lose the ability to NAT I was
> providing for an ailing DEC 3000/500S.  Anyway, I can live with that.
> One odd side-effect of switching the cards is that tlp0 and tlp1
> switched around.  I guess anything populating PCI bus 2 gets probed
> before anything on PCI bus 1.  However, it seems that anything plugged
> into PCI bus 2 won't work (at least in this 1000A), because of the
> "unable to map interrupt" problem. :-(
> Does anyone have an AlphaServer 1000A in which cards plugged into PCI
> bus 2 work under NetBSD?  The devices in the one here show up and test
> okay under SRM, BTW.

Well, I guess some alpha-specific code needs to be fixed.
Can you please fill in a PR about this ?

Manuel Bouyer, LIP6, Universite Paris VI. 
     NetBSD: 24 ans d'experience feront toujours la difference