Date: Sat, 18 Jan 1997 04:33:02 -0500 (EST) From: Kenneth Merry <ken@housing1.stucen.gatech.edu> To: ken@housing1.stucen.gatech.edu (Kenneth Merry) Cc: smp@csn.net, cbrown@aracnet.com, smp@FreeBSD.ORG Subject: Re: Adaptec 3940UW and SMP Message-ID: <199701180933.EAA10357@housing1.stucen.gatech.edu> In-Reply-To: <199701180728.CAA07347@housing1.stucen.gatech.edu> from Kenneth Merry at "Jan 18, 97 02:28:43 am"
next in thread | previous in thread | raw e-mail | index | archive | help
Kenneth Merry wrote... > > Well, with all the talk of interrupts, I got a bit curious and did > a few tests with my system to see how things would work. In summary, the > way slots go on my system, according to the manual is that PCI slots 1-3 > have unique interrupts, and slots 4 and 5 share the same interrupt. (Steve > gave a much more detailed assessment of how things work...) > > Before I started these tests, my original, working (i.e. for > Uniprocessor, APIC_IO and non-APIC_IO kernels) configuration looked like > this: > > Slot 1: Adaptec 3940UW (IRQ 11) > Slot 2: Matrox Millenium (IRQ 10) > Slot 3: no card (IRQ 9) > Slot 4: SMC 10/100 (IRQ 14) > Slot 5: no card (shares IRQ 14 w/ slot 4) > > I hard-coded each of the above IRQ values in the BIOS for each > slot. > > I then changed things around so that all of the interrupt assignments > were autoconfigured by the BIOS. > > On boot, the BIOS prints out the interrupt assignments and class > names of the various PCI boards. Here's the way it assigned the > interrupts: > > Slot 1: SMC 10/100 (IRQ 5) > Slot 4: Adaptec 3940UW (IRQ 14 for channel 1, IRQ 3 for channel 2) > Slot 5: Matrox Millenium (IRQ 3) I made a mistake here, it should actually be: Slot 1: Adaptec 3940UW (IRQ 14 for channel 1, IRQ 3 for channel 2) Slot 2: Matrox Millenium (IRQ 3) Slot 4: SMC 10/100 (IRQ 5) Steve gets credit for pointing out the brain-o. :) Ken -- Kenneth Merry ken@ulc199.residence.gatech.edu Disclaimer: I don't speak for GTRI, GT, or Elvis.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199701180933.EAA10357>