From owner-cvs-src@FreeBSD.ORG Sun Oct 10 03:33:08 2004 Return-Path: Delivered-To: cvs-src@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1140116A4CE; Sun, 10 Oct 2004 03:33:08 +0000 (GMT) Received: from ylpvm43.prodigy.net (ylpvm43-ext.prodigy.net [207.115.57.74]) by mx1.FreeBSD.org (Postfix) with ESMTP id AAF8A43D31; Sun, 10 Oct 2004 03:33:07 +0000 (GMT) (envelope-from nate@root.org) Received: from [10.0.5.52] (adsl-64-171-187-209.dsl.snfc21.pacbell.net [64.171.187.209])i9A3XA9p018493; Sat, 9 Oct 2004 23:33:10 -0400 Message-ID: <4168AD6D.1000105@root.org> Date: Sat, 09 Oct 2004 20:33:01 -0700 From: Nate Lawson User-Agent: Mozilla Thunderbird 0.7.3 (X11/20040901) X-Accept-Language: en-us, en MIME-Version: 1.0 To: "M. Warner Losh" References: <4167178E.3050303@root.org> <20041009.205301.93208213.imp@bsdimp.com> <4168A67A.2090805@root.org> <20041009.211615.109981313.imp@bsdimp.com> In-Reply-To: <20041009.211615.109981313.imp@bsdimp.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: cvs-src@freebsd.org cc: src-committers@freebsd.org cc: cvs-all@freebsd.org cc: jhb@freebsd.org cc: oberman@es.net Subject: Re: cvs commit: src/sys/dev/acpica acpi_quirks acpi_timer.c acpivar.h X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 10 Oct 2004 03:33:08 -0000 M. Warner Losh wrote: > In message: <4168A67A.2090805@root.org> > Nate Lawson writes: > : M. Warner Losh wrote: > : > : > In message: <4167178E.3050303@root.org> > : > Nate Lawson writes: > : > : Some slots force irq sharing but if you have devices that can't handle > : > : that irq, they fail. This is especially on older systems that have an > : > : ISA and PCI slot that share an irq line. > : > > : > Are there such systems like this that actually work? We've been > : > telling people that they can't share PCI and ISA interrupts because > : > ISA is edge triggered and PCI is level triggered. > : > : My Abit BP6 has such a configuration for the last slot. You can only > : put a PCI card OR ISA card in, not both. > > And you MUST use an IRQ that is used by PCI for that ISA slot? The > ISA slots don't share an IRQ with PCI at all. They might share the > slot, but they don't share interrupts because the ISA card dispatches > the interrupts directly through the IRQ lines on the ISA bus, and the > PCI dispatches it through #INT[A-D] through the bridges between the > device and CPU. I think I'm confusing two different things. For the shared slot, you can't put more than one card in at a time. The IRQ conflict was between AGP and PCI slot 1 and had nothing to do with ISA. -Nate