IM_ALLOC_INT
if (bus_space_read_1(bst, bsh, INTR_STAT_REG_B) & IM_ALLOC_INT)
bus_space_read_1(bst, bsh, INTR_MASK_REG_B) | IM_ALLOC_INT);
if (status & IM_ALLOC_INT) {
mask &= ~IM_ALLOC_INT;