ULONG
McaAdapterPresent(
  IN  PHW_DEVICE_EXTENSION HwDeviceExtension,
  IN OUT PPORT_CONFIGURATION_INFORMATION ConfigInfo,
  IN OUT PULONG AdapterCount,
  OUT PBOOLEAN Again
  );

Routine Description:

    Determine if Spock adapter present in sytem by reading
    interrupt status register.

Arguments:

    HwDeviceExtension - miniport device extension

    ConfigInfo - Supplies the known configuraiton information.

    AdapterCount - Supplies the count of adapter slots which have been tested.

    Again - Returns whether the  OS-specific driver should call again.

Return Value:

    Returns TRUE if adapter exists