From owner-freebsd-hackers Mon Nov 18 18:38:27 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id SAA07520 for hackers-outgoing; Mon, 18 Nov 1996 18:38:27 -0800 (PST) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id SAA07490; Mon, 18 Nov 1996 18:38:05 -0800 (PST) Received: (from msmith@localhost) by genesis.atrad.adelaide.edu.au (8.8.2/8.7.3) id NAA25979; Tue, 19 Nov 1996 13:07:43 +1030 (CST) From: Michael Smith Message-Id: <199611190237.NAA25979@genesis.atrad.adelaide.edu.au> Subject: Re: split speed sio port? In-Reply-To: <199611190117.BAA02796@veda.is> from Adam David at "Nov 19, 96 01:17:03 am" To: adam@veda.is (Adam David) Date: Tue, 19 Nov 1996 13:07:41 +1030 (CST) Cc: freebsd-hackers@freebsd.org, freebsd-questions@freebsd.org X-Mailer: ELM [version 2.4ME+ PL28 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Adam David stands accused of saying: > Is it possible with the sio driver to set a serial port to receive at > 38,4 kb/s and transmit at 115,2 kb/s simultaneously? How would this be > achieved? As a last resort, I could crosswire 2 ports into a single > serial-port connector, but how is it done using only the one port? It isn't. The 8250 has a single baudrate generator, and doesn't support an external clock in the configuration normally used in PCs. You either need a card with a UART that handles split speeds (eg. ESCC), or as you suggested use two ports. > Adam David -- ]] Mike Smith, Software Engineer msmith@gsoft.com.au [[ ]] Genesis Software genesis@gsoft.com.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control. (ph) +61-8-8267-3493 [[ ]] Unix hardware collector. "Where are your PEZ?" The Tick [[