On Mon, 27 Mar 2000, Robert Alexander Stragies wrote:

hi all,

On Mon, 27 Mar 2000, Jon Pennington wrote:

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Robert Alexander Stragies said:

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hi all, and jon

Are you sure, that all bioses would assign a new irq if i just moved the card?

I am not a hardware technician, so my knowlege is by no means comprehensive. On most motherboards, PCI slots share IRQs in pairs, i.e. slots 0 and 1 share an IRQ, slot 2 may or may not, slots 3 and 4 share an IRQ, and slots 5 and 6 may or may not share. The fast way to find out is to move one card two slots ;).

but i have 4 devices sharing irq 11. usbcontroller, tvcard, Ati mach64 (AGP), and matrox pci. i have 3 or 4 pcislots, 2 ocupied. thought's?

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-- -=|JP|=- Jon Pennington | Atipa Linux Solutions jpennington@atipa.com | http://www.atipa.com Kansas City, MO, USA | 816-241-2641 x121

It's pretty dependent on the BIOS of the machine, the higher quality boards will sometimes even tell you which slots share which IRQ's to help you route around the problem. However, I've also noticed certain types of cards (SB-Live in specific) that seem to take the same IRQ or share with the same other cards (strange, I know) no matter where you put them or what order you put them in. Some BIOS versions even allow you to bind IRQ's to specific slots in the config (my personal preference :). Plus, the perpheral cards vary according to how nice they'll play. Some share well and others don't play nice at all and hog the resources. The only way to be sure is to mess around with the machine and see how it reacts for you. -- Ray Schwamberger Linux Technician Atipa Linux Solutions -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/Support/Doku/FAQ/

hi ben, jon , and all On Mon, 27 Mar 2000, Ben Rosenberg wrote:

Hello all, Well, most motherboards I have worked with and there have been 100's of them..in most cases if you tell it to specify the settings instead of auto then you can assign IRQ's specifically to each PCI slot. In my K6-3 box I have it like this.. PCI Slot 1 = IRQ 9 2 = IRQ 10 3 = IRQ 11 4 = IRQ 12 I usually set most computers I build like this..I even built an AMD Athlon box for my friend lastnight and put Win98 on hda and SuSE on hdc..I setup his PCI slots with specific IRQ's and even Windows didn't bitch :) Hope this helps ...

i know this procedure, i also use it on all motherboards i lay my hands on , but this is a compaq presario 4840, where extended setup , where above can be done, is stored on the system partition, which i removed 2.5 years ago, and have not needed since. Now, the downloaded bootdisk from compaq to solve these kind of problems appears to not want to boot. They say, they have made enhancements to it for the newer presario and armada models and that it supersedes Service pack 9879, which is not available anymore... So, i dont have a simple way to influence irq settings. i have looked at setpci and it says it can do something with the irq_pin and irq_line settings, but i did nto understand what. Thought's? thx, Alex

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Are you sure, that all bioses would assign a new irq if i just moved the card?

I am not a hardware technician, so my knowlege is by no means comprehensive. On most motherboards, PCI slots share IRQs in pairs, i.e. slots 0 and 1 share an IRQ, slot 2 may or may not, slots 3 and 4 share an IRQ, and slots 5 and 6 may or may not share. The fast way to find out is to move one card two slots ;).

but i have 4 devices sharing irq 11. usbcontroller, tvcard, Ati mach64 (AGP), and matrox pci. i have 3 or 4 pcislots, 2 ocupied. thought's?

-- Ben Rosenberg mailto:ben@whack.org SuSE Linux 6.3 (2.2.14) ICQ UIN:49268667 ------------------------------------------------------------ " Success is how high you bounce when you hit bottom " --Gen. George Patton

-- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/Support/Doku/FAQ/