From owner-freebsd-hackers Fri Feb 23 18:10:45 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id SAA03313 for hackers-outgoing; Fri, 23 Feb 1996 18:10:45 -0800 (PST) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id SAA03293 for ; Fri, 23 Feb 1996 18:10:40 -0800 (PST) Received: from msmith@localhost by genesis.atrad.adelaide.edu.au (8.6.12/8.6.9) id MAA25642; Sat, 24 Feb 1996 12:39:15 +1030 From: Michael Smith Message-Id: <199602240209.MAA25642@genesis.atrad.adelaide.edu.au> Subject: Re: 230.400 bps on serial port To: petzi@zit.th-darmstadt.de (Michael Beckmann) Date: Sat, 24 Feb 1996 12:39:14 +1030 (CST) Cc: hackers@FreeBSD.ORG In-Reply-To: from "Michael Beckmann" at Feb 23, 96 11:49:56 am MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.ORG Precedence: bulk Michael Beckmann stands accused of saying: > > I need a reliable data transfer rate of 230.400 bps on the serial port for > PPP. Can that be done ? getty only has a setting for 115.200 bps. I have a > Gigabyte 586 ATEP mainboard with FIFOs. Can I use them for 230.400 bps, and > how ? Or should I buy a special serial card for that ? You will have to buy a special serial card; the standard serial ports on a PC can only be configured for 115200. Note that at the speed you suggest a 16550 UART will be generating around 15,000 interrupts per second. This will place a _serious_ load on your system, and if you're using IDE disk, may cause you to suffer communications problems. Unless you're building a dedicated router, I'd suggest looking for an alternative solution. > Michael -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] Collector of old Unix hardware. "Where are your PEZ?" The Tick [[