From owner-freebsd-current@FreeBSD.ORG Mon Sep 1 17:13:33 2003 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6FA0016A4BF; Mon, 1 Sep 2003 17:13:33 -0700 (PDT) Received: from cimlogic.com.au (cimlog.lnk.telstra.net [139.130.51.31]) by mx1.FreeBSD.org (Postfix) with ESMTP id 83C5643F85; Mon, 1 Sep 2003 17:13:30 -0700 (PDT) (envelope-from jb@cimlogic.com.au) Received: from freebsd1.cimlogic.com.au (localhost.cimlogic.com.au [127.0.0.1]) by cimlogic.com.au (8.12.9/8.12.9) with ESMTP id h820EqvD008974; Tue, 2 Sep 2003 10:14:52 +1000 (EST) (envelope-from jb@cimlogic.com.au) Received: (from jb@localhost) by freebsd1.cimlogic.com.au (8.12.9/8.12.9/Submit) id h820EqHB008973; Tue, 2 Sep 2003 10:14:52 +1000 (EST) Date: Tue, 2 Sep 2003 10:14:51 +1000 From: John Birrell To: Scott Long Message-ID: <20030902101451.F1311@freebsd1.cimlogic.com.au> References: <1062445674.59251.1.camel@acheron.livid.de> <3F53CF00.6020304@freebsd.org> <20030901232227.5F1D23A4C3@www.fastmail.fm> <3F53D645.2040501@freebsd.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <3F53D645.2040501@freebsd.org>; from scottl@freebsd.org on Mon, Sep 01, 2003 at 05:29:09PM -0600 cc: current@freebsd.org cc: "Scott M. Likens" Subject: Re: Question related to FreeBSD Serial Console... X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 02 Sep 2003 00:13:33 -0000 On Mon, Sep 01, 2003 at 05:29:09PM -0600, Scott Long wrote: > At one time I was working on patches to the loader to make the console > speed configurable. At the time, at least, I didn't see any evidence > that the settings were stored in the boot0 block, but maybe I was wrong. AFAIK, the boot0 block uses bios int 0x16 to get a key-press and bios int 0x10 to display a character, so in a situation where you *want* a serial console, the F1 etc stuff can't be used unless the bios supports console re-direction. And you have to live with whatever baud rate the bios sets. Once you get to boot2, then the serial console can work if set in /boot.config. It would be nice to have a boot.config setting for the baud rate. I have a board here that allows bios re-direction to either the first or second serial port at a fixed baud rate of 38400. I have to build boot2 with BOOT_COMCONSOLE_SPEED=38400, and then the kernel with CONSPEED=38400 to get all the ducks in a row. But it would be even nicer if both boot2 and the kernel would just work with whatever baud rate the bios set. -- John Birrell