M-Audio Delta 410 Manual page 49

Sometimes it is possible that a resource problem is not showing up in the
conflicting resource list or as a yellow exclamation point in the Device Manager.
If you have any doubt about the configuration of your device (or just want to
double-check), you can view all of the devices and their assigned resources by
highlighting "Computer" at the top of the Device Manager list and clicking the
Properties button. This will allow you to view a list of assigned IRQ numbers on
the left, and the associated devices on the right. If a number does not show up in
this list, it means that it is available for use. Look also for IRQs that are shared by
more than one device. While the Delta 410 may share an IRQ with some devices,
not all devices are capable of sharing IRQs. An entry that reads "IRQ Holder for
PCI Steering" along with an installed PCI device (such as the Delta 410) is
normal. If you see another device showing up on the same IRQ as the Delta 410
(such as a video card, SCSI adapter, USB Host Controller or hard disk 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 300h (the default address
of the Midiman Midisport 8x8/s, for instance), 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' (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.
With some systems you will reach the dead-end realization that you have no
available IRQs – 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.
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