Oops. Meant the code snippet to read as follows. (Comments have changed). #define CFLOW_EXT (08000000) #define CFLOW (CLOCAL | CRTSCTS | CFLOW_EXT) #define CRTSADC (CFLOW_EXT) /*RTS auto direction control*/ #define CDTRADC (CFLOW_EXT | CLOCAL) /*DTR auto direction control*/ -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html