> Unfortunately I wasn't as lucky. We spent quite a bit of time before > figuring out that the NS1645 UART on the original IBM serial and Maybe you had an eralier PC than I ever used, IIRC my documentation referred to a 8250. Is there any NS1645 datasheet on the web? Google did not give me one. > [Ironically, I believe > the "RS" in > "RS-232" stands for "Recommended Standard" -- makes one > wonder what the > official one is...] Those documents at least pretend to be a step towards a standard, the internet depends on just 'Requests For Comment' :) Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist