Table of Contents
Advertisement
If PnP has chosen an IRQ for the DMAN PCI that is being shared with another
device, there might be a device conflict. If the DMAN PCI is sharing an IRQ
with an entry named "IRQ Holder for PCI Steering," that is normal and should
function properly. If the DMAN PCI is sharing an IRQ with another PCI
device (such as a USB Host Controller), it might also do so without problems
since the DMAN PCI is capable of sharing an IRQ with many other PCI prod-
ucts. However, IRQ's are rarely shareable between ISA devices that are not
PnP-compliant and other cards. If this is the case one of the devices will have
to be manually adjusted to use another IRQ.
NOTE: When resolving conflicts between PnP and non-PnP devices, it is
usually easier to readjust the resource settings of the non-PnP device.
Windows is only aware of the resource settings of the installed PnP devices
and has no information available to it for adjusting the PnP devices around
the non-PnP devices. The exception to this is when a non-PnP device has a
true Windows 98/95 driver written for it, or if the BIOS allows instructions
for an IRQ to receive a legacy device as opposed to a PnP device. In that case
Windows is aware of the non-PnP device's resource requirements.
If you ever need to change the DMAN PCI card's IRQ, the easiest way is to
move the DMAN PCI to another available PCI slot. This will cause the system
to recognize it again as new hardware and establish it with another IRQ. Some
newer BIOS's (see your computer manual) allow the selection of an IRQ for
each PCI slot on the motherboard. This can be very handy in resolving IRQ
assignments for PCI devices. However, if there are no IRQs available, some
kind of reconfiguring or reprioritizing your system may be required. See the
"Troubleshooting" guide for more info. Also, a second hardware configuration
can be created for running two sets of hardware profiles. See your Windows
documentation for help in this area.
As mentioned earlier, the Computer Properties list is the best source of infor-
mation to establish availability of resources. Clicking the Input/Output (I/O)
button at the top of the box will give you a list of Addresses in use (as well as
DMA channels, although none are used by the DMAN PCI). Usually, there are
not address conflicts between PnP devices, but one might note that an address
of 300h (the default address of the WINMAN 4x4/S, for instance), will read
"0300" in this list (it is a 16-bit hexadecimal representation).
16
Advertisement
Table of Contents
