M-AUDIO DIO2448 - Manual (Page 19)

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see another device showing up on the same IRQ as the DiO 2448 (such as a
video card, SCSI adapter, or USB Host Controller), then it is possible that this
is the source of the conflict. Typically, if you move one of the conflicting
cards to another PCI slot, an IRQ conflict will disappear.
Address conflicts are rare amongst PCI devices, but if there is no obvious
IRQ conflict, why not check for I/O Address conflicts while in the Device
Manager? You may view the list of assigned I/O addresses by selecting the
“Input/output (I/O)” radio button below the “Interrupt Request (IRQ)”
radio button at the top of the Device Manager page. I/O addresses are
displayed as 16-bit hexadecimal numbers, therefore one might note that an
address of 300 hex will read “0300” in this list.
If scanning all the resource lists in the Device Manager does not provide an
answer or clue to the resource conflict, you might want to exit Windows and
do a final inspection of your computer’s BIOS setup. Some newer BIOS’s
(see your computer manual) allow the reservation of an IRQ for each PCI slot
on the motherboard. This may be very handy in resolving IRQ assignments
for PCI devices.
Also, sometimes a BIOS is configured to direct a particular IRQ to an ISA
legacy device (non-PnP ISA card), and needs to be told to look for a PCI/ISA
PnP device (some systems default to this, especially with IRQs 3 and 4).
Consult your computer or motherboard manual for advice on how to do
this.
Finally, with some systems you will reach the dead-end realization that you
have no available IRQ’s — every one of them is assigned to some device in
the system. This most typically occurs with pre-packaged computers made
by the big-name O.E.M. computer companies. These computers have so
many features packed into them that every IRQ is consumed. In this type of
situation, some kind of reconfiguring or reprioritizing your system is in
order. Optionally, Windows may allow you to create a second “hardware
configuration” which disables some of the installed devices and makes their
resources available for general use. See your Windows documentation for
information on this subject.