Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!ut-sally!utah-cs!utah-gr!stride!tahoe!unsvax!jimi!otto!rex From: rex@otto.COM (Rex Jolliff) Newsgroups: comp.sys.m6809 Subject: RS-232 port: hardware or sotfware? Message-ID: <500@otto.COM> Date: Sat, 18-Jul-87 08:34:07 EDT Article-I.D.: otto.500 Posted: Sat Jul 18 08:34:07 1987 Date-Received: Sun, 19-Jul-87 19:54:45 EDT References:Reply-To: rex@otto.UUCP (Rex Jolliff) Organization: Las Vegas Sun Lines: 21 Summary: Expires: Sender: Followup-To: Distribution: Keywords: I was thinking of buying a coco (2 or 3) and I was wondering if the rs-232 port is all hardware or if any of it is implemented in software. Let me clarify this. I own a Commodore-64, and it's rs-232 port is set up as follows: an 8-bit parellel port is used, and each of the rs-232 pins, including the TxD and RxD, are driven by a line coming off the parellel port. A piece of software is tied to the NMI vector and the timer is loaded with a value that comes as close as they could to the actual baud rate. This doesn't really work at all past 1200 baud, and not even that good at 1200 baud. I would rather not buy another computer with a kludge like this, and if coco's have a HARDWARE UART, I would like to know. This probably is'nt in everybodies interest, so E-mail replies. Rex. -- Rex Jolliff (rex@otto.UUCP, {akgua,ihnp4,mirror,sdcrdcf}!otto!rex) The Sun Newspaper - |Disclaimer: The opinions and comments in Nevada's Largest Daily Morning | this article are my own and in no way Newspaper | reflect the opinions of my employers. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - What happened to our superior space program?