INTIO_DEV_3xx_STAT
*statusp = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT);
while (bus_space_read_1(bst,bsh,INTIO_DEV_3xx_STAT) \
while (!(bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT) \
status = bus_space_read_1(bst, bsh, INTIO_DEV_3xx_STAT);