Date: Tue, 07 Feb 2006 22:01:59 -0800 From: Nate Lawson <nate@root.org> To: Warner Losh <imp@bsdimp.com> Cc: freebsd-acpi@freebsd.org Subject: Re: Kernel panic with ACPI enabled Message-ID: <43E98957.9000207@root.org> In-Reply-To: <20060207.205201.74679845.imp@bsdimp.com> References: <200602071237.31791.duncan.fbsd@gmail.com> <200602071404.44314.jhb@freebsd.org> <200602071413.07109.duncan.fbsd@gmail.com> <20060207.205201.74679845.imp@bsdimp.com>
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Warner Losh wrote: >>Actually most modern computers don't physically have a slot for either >>isa or eisa. Quite possibly either one would work. I have 'device eisa' >>in my conf, it's also 'device eisa' in the GENERIC conf which is why I >>mentioned it. > > The ISA bus still exists in most every machine today, although it is > electrically incompatible with the original ISA bus and isn't an > expansion bus for cards. It lives on as LPC. However, FreeBSD still > treats LPC and ISA as the same thing since from a software perspective > they basically are the same. Just to clarify something wrong in a previous reply. The southbridge (ICH in Intel-language) doesn't contain the keyboard or mouse controller, floppy, or other low speed devices. Instead, those are on a Super I/O chip that is attached via the LPC bus to the ICH. The ICH contains medium speed things like sound, ATA, USB, ethernet, etc. > Adding device eisa can cause problems. It causes reads to registers > that many really don't implement anymore. Since windows doesn't look > at these registers, many motherboards have them broken. Justin Gibbs and I fixed one hanging problem with the EISA probe a few years back. I'm not sure if there are others. -- Nate
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