Maybe a stupid question, but how paranoid should I be when it comes to character maps? Is it safe to assume that if I want '\x41' to be sent to a UPS, that this equals sending the 'A' character? In other words, is it considered portable that (at least for the output of the serial functions) we use an ASCII character map? Otherwise, on (for example) an EBCDIC system (do these still exist?) you're in for a surprize, since sending an 'A' will transmit '\0xC1'. Or do the serial function handle this? Regards, Arjen -- Eindhoven - The Netherlands Key fingerprint - 66 4E 03 2C 9D B5 CB 9B 7A FE 7E C1 EE 88 BC 57