Date: Mon, 19 Jun 2000 14:50:16 +0200 From: Stefan Esser <se@freebsd.org> To: Graham Wheeler <gram@cequrux.com> Cc: freebsd-hackers@FreeBSD.ORG, Stefan Esser <se@freebsd.org> Subject: Re: PCI Plug 'n' Pray and old BIOSes Message-ID: <20000619145016.A2212@StefanEsser.FreeBSD.org> In-Reply-To: <fe7fe58677055b27cc45056533eeb115@cequrux.com>; from gram@cequrux.com on Mon, Jun 19, 2000 at 11:05:30AM %2B0200 References: <fe7fe58677055b27cc45056533eeb115@cequrux.com>
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On 2000-06-19 11:05 +0200, Graham Wheeler <gram@cequrux.com> wrote: > As I was under time pressure, I pulled the card out and put it in a > different machine, this one a P166 which works fine (with the same IRQ). > > Anyway, when I get a chance I would like to try it again in the 486. The > 486 has three PCI slots, and the BIOS has some additional settings which > may be the reason it wasn't working. I'm unfamiliar with what some of > these do, and am hoping that someone on the list may have experience > with early days of PCI and Plug 'n Play, and be able to help. > > These are the settings: > > Slot n IRQ Line (this is the only one I set on my first attempt, to 12) Is the PS/2 mouse interface enabled ? It will try to grab IRQ 12, and may do so in a way that the IRQ can't be delivered from ISA or PCI slots ... > Perhaps all I need to do is toggle the PnP BIOS setting, but before I > pull out the screwdrivers and tear the two machines apart again, I'm > hoping to draw on someone else's experience here. Depending on the time when the mainboard was built, this may be a board that needs jumpers configured accordingly (i.e. you have to enter the jumper settings in the BIOS, which will put the number in the appropriate config space register, but interrupt routing is implemented via jumper fields ...) The first ASUS 486 board, for example, (the 486-SP3, based on the Saturn 1, chip revision 2) used jumpers, while the SP3G used the Saturn II (chip rev. 4) and there was an IRQ routing matrix in the chipset, which allowed for BIOS-only IRQ assignment. Regards, STefan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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