Date: Wed, 19 Mar 1997 22:53:14 -0800 From: David Greenman <dg@root.com> To: Jaye Mathisen <mrcpu@cdsnet.net> Cc: Tom Samplonius <tom@uniserve.com>, freebsd-current@FreeBSD.ORG, "Justin T. Gibbs" <gibbs@freefall.freebsd.org> Subject: Re: ahc problems with 2.2+ Message-ID: <199703200653.WAA00973@root.com> In-Reply-To: Your message of "Wed, 19 Mar 1997 21:53:39 PST." <Pine.NEB.3.95.970319215218.29913H-100000@mail.cdsnet.net>
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>I don't know specifically about your case, but on one motherboard I had, >turning off the allow_memio fixed my problems completely. Apparently on >the 3940, some MB BIOS's don't initialize the PCI bridge correctly. Or >ast least, I think that was a simplification of what Justin once told me. > >In any case, since I stopped using MEMIO for this particular MB, it's >worked fine. ...and if I _don't_ turn on AHC_ALLOW_MEMIO on wcarchive, the machine dies regularly with a PCI bus parity error during the PIO instruction. This seems to happen on some (especially P6) machines. With Justin's latest stuff, wcarchive has been quite stable. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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