From owner-freebsd-hackers Fri Feb 23 09:33:10 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id JAA23853 for hackers-outgoing; Fri, 23 Feb 1996 09:33:10 -0800 (PST) Received: from phaeton.artisoft.com (phaeton.Artisoft.COM [198.17.250.211]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id JAA23848 for ; Fri, 23 Feb 1996 09:33:08 -0800 (PST) Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id KAA23715; Fri, 23 Feb 1996 10:27:50 -0700 From: Terry Lambert Message-Id: <199602231727.KAA23715@phaeton.artisoft.com> Subject: Re: 230.400 bps on serial port To: petzi@zit.th-darmstadt.de (Michael Beckmann) Date: Fri, 23 Feb 1996 10:27:49 -0700 (MST) Cc: hackers@FreeBSD.ORG In-Reply-To: from "Michael Beckmann" at Feb 23, 96 11:49:56 am X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.ORG Precedence: bulk > 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 ? That is MIDI speed. I wonder what you are doing? 8-). The Intel UART parts, as much as Dennis loves them, use a clock divider and the standard frequency for the crystal makes it impossible to get that data rate out of the serial hardware (I assume you have an Amiga or similar current loop converter for RS232?). My personal opinion is that the Intel parts are utter crap. You will have to go with a part that has the ability to go to baud rates not limited by a clock divider. The easiest of these to get your hands on is a Zilog part. The Zilog part is used on most Appletalk cards for the PC, or for the TOPS network. Check your Amiga manual for what it uses. 8-). Writing a driver is up to you; it should be oe of the easier drivers to write. Or you could get a sound card that the sound driver supports MIDI for; see the sound driver comments/documentation for details. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.