dec_2100_a500_eisa_intr_disestablish
ec->ec_intr_disestablish = dec_2100_a500_eisa_intr_disestablish;
ic->ic_intr_disestablish = dec_2100_a500_eisa_intr_disestablish;
static void dec_2100_a500_eisa_intr_disestablish(void *, void *);