CAC_INTR_ENABLE
cac_outb(sc, CAC_EISAREG_INTR_MASK, CAC_INTR_ENABLE);
cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_ENABLE);
state ? CAC_INTR_ENABLE : CAC_INTR_DISABLE);