DLCR_RX_STAT
bus_space_write_1(bst, bsh, DLCR_RX_STAT, 0xff);
while (!(bus_space_read_1(bst, bsh, DLCR_RX_STAT) & RX_BUS_RD_ERR))
bus_space_write_1(bst, bsh, DLCR_RX_STAT, RX_BUS_RD_ERR);
rstat = bus_space_read_1(bst, bsh, DLCR_RX_STAT);
bus_space_write_1(bst, bsh, DLCR_RX_STAT, rstat);
bus_space_read_1(bst, bsh, DLCR_RX_STAT),