PCI224_INTR_EXT
#define PCI224_INTR_EDGE_BITS (PCI224_INTR_EXT | PCI224_INTR_Z2CT1)
devpriv->intsce = PCI224_INTR_EXT | PCI224_INTR_DAC;
devpriv->intsce |= PCI224_INTR_EXT;
if (valid_intstat & PCI224_INTR_EXT) {
devpriv->intsce &= ~PCI224_INTR_EXT;