XL_CMD_INTR_ACK  1508 dev/ic/xl.c    		    XL_CMD_INTR_ACK|(status & XL_INTRS));
XL_CMD_INTR_ACK  2117 dev/ic/xl.c    	CSR_WRITE_2(sc, XL_COMMAND, XL_CMD_INTR_ACK|0xFF);
XL_CMD_INTR_ACK  2453 dev/ic/xl.c    	CSR_WRITE_2(sc, XL_COMMAND, XL_CMD_INTR_ACK|XL_STAT_INTLATCH);