XL_CMD_UP_STALL  1300 dev/ic/xl.c    		CSR_WRITE_2(sc, XL_COMMAND, XL_CMD_UP_STALL);
XL_CMD_UP_STALL  2059 dev/ic/xl.c    	CSR_WRITE_2(sc, XL_COMMAND, XL_CMD_UP_STALL);