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DOS PCI and Interrupts

Hello all,

I am developing a DOS based PCI device driver for a communications card. I
am a little confused as to how to handle the interrupt. Since PCI interrupts
may be shared, how do I get my ISR to work properly?

Do I need to chain the interrupt?

Since PCI interrupts are level triggered, how will I know if there is
another device driver for a different device that is also sharing the

Any help will be greatly appreciated.

Best regards,

Michael H. Berkowitz
Senior Systems Engineer
Jones Futurex, Inc.
3715 Atherton Road
Suite 1000
Rocklin, CA 95765
(916) 632-9450 x1340
(916) 632-9456