Tech Support > Microsoft Windows > Drivers > MSI IRQ is negative in device manager
MSI IRQ is negative in device manager
Posted by Gabe on January 30th, 2008


Running on Vista32, I have a PCIe device that supports MSI. The
CM_PARTIAL_RESOURCE_DESCRIPTOR has a value of 0x8 for the
MessageInterrupt.Translated.Level member, but device manager shows
that the IRQ is 0xFFFFFFFC ( -4?). There is a KB that describes this
situation but does not indicate whether this is expected behavior or
anything of that nature. It merely says it is aware of it.

http://support.microsoft.com/kb/940394

Can anyone shed some light on this?

Posted by Maxim S. Shatskih on January 31st, 2008


For me, this looks like insignificant implementation detail of MSIs in
Windows. Is this bad? is the device OK?

--
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
maxim@storagecraft.com
http://www.storagecraft.com

"Gabe" <gabe.black@ni.com> wrote in message
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