[OT] IRQs above 15 in Linux

Adam Myrow myrow at eskimo.com
Thu Sep 19 18:26:12 EDT 2002


I know this is off topic a little, but I can't find anything on it.  As I
reported previously, when I installed my Linksys NIC, Windows 95 disabled
my sound card and said it has a resource conflict.  Linux has had no
trouble with it.  Now, I know why.  Windows uses IRQs from 1 to 15, while
Linux uses IRQs above 15.  For example, my modem is on IRQ 17 and my NIC
is on IRQ 19.  It only seems to do this with PCI devices, so I assume it's
a PCI-specific feature.  What I'm trying to find out is if any version of
Windows can be made to use high IRQs like that, or where the feature is
explained on a more technical level.  I've done searches on various search
engines, but can't seem to find anything.  If anybody has a clue on this,
let me know.  Thanks.






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