Cannot get Interrupts on one card when two PCI cards of same type- loaded

NTDEV
1

I have two identical PCI cards. The problem I am having is that I can open
each card individually and have interrupts fire off fine. When I open them
both, I only get interrupts on the card that was opened first. Any advice?

  1. I use HalGetBusData() to figure out the Bus number, slot number.
  2. I create a device object for each PCI card(CARD001, CARD002) with
    IoCreateDevice().
  3. I issue the call HalAssignSlotResources() to retrieve the Port
    Address, IRQ and IRQ level.
  4. I issue HalTranslateBusAddress() to get bus specific address.
  5. I issue a HalGetInterruptVector() to get the MappedSystemVector.
  6. I issue the IoConnectInterrupt() call to connect the interrupt.

The above sequence is performed for each card. Whichever is the first card
that is opened generated interrupts fine. The other card is initialized
successfully but no generated interrupts get to my handler. Any ideas?’

Regards

WCSC(Willies Computer Software Co)
Web: http://www.wcscnet.com Email: xxxxx@wcscnet.com
Tel: (281)360-4232 Fax: (281)360-3231

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