From owner-freebsd-current@FreeBSD.ORG Sat Feb 9 10:28:52 2008 Return-Path: Delivered-To: current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id B088816A417 for ; Sat, 9 Feb 2008 10:28:52 +0000 (UTC) (envelope-from uspoerlein@gmail.com) Received: from acme.spoerlein.net (acme.spoerlein.net [217.172.44.86]) by mx1.freebsd.org (Postfix) with ESMTP id 2742313C459 for ; Sat, 9 Feb 2008 10:28:51 +0000 (UTC) (envelope-from uspoerlein@gmail.com) Received: from roadrunner.spoerlein.net (e180151104.adsl.alicedsl.de [85.180.151.104]) by acme.spoerlein.net (8.14.1/8.14.1) with ESMTP id m19ASnRL017095 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sat, 9 Feb 2008 11:28:51 +0100 (CET) (envelope-from uspoerlein@gmail.com) Received: from roadrunner.spoerlein.net (localhost [127.0.0.1]) by roadrunner.spoerlein.net (8.14.2/8.14.2) with ESMTP id m19AOGX5003032 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 9 Feb 2008 11:24:16 +0100 (CET) (envelope-from uspoerlein@gmail.com) Received: (from uqs@localhost) by roadrunner.spoerlein.net (8.14.2/8.14.2/Submit) id m19AOF94003031; Sat, 9 Feb 2008 11:24:15 +0100 (CET) (envelope-from uspoerlein@gmail.com) X-Authentication-Warning: roadrunner.spoerlein.net: uqs set sender to uspoerlein@gmail.com using -f Date: Sat, 9 Feb 2008 11:24:15 +0100 From: Ulrich Spoerlein To: Scott Long Message-ID: <20080209102415.GC1584@roadrunner.spoerlein.net> Mail-Followup-To: Scott Long , "Bruce M. Simpson" , current@freebsd.org References: <20080208185405.GA1479@roadrunner.spoerlein.net> <47ACAE62.2060706@FreeBSD.org> <47ACB7BB.7090305@samsco.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <47ACB7BB.7090305@samsco.org> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: "Bruce M. Simpson" , current@freebsd.org Subject: Re: boot0sio working for anyone? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 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: Sat, 09 Feb 2008 10:28:52 -0000 On Fri, 08.02.2008 at 13:12:43 -0700, Scott Long wrote: > Bruce M. Simpson wrote: > > Ulrich Spoerlein wrote: > >> So, is boot0sio supposed to just work with a cheap USB->RS232 dongle at > >> the other end? I don't know how this paragraph from boot0cfg(8) is > >> affecting me. > >> > > boot0sio is wholly dependent upon BIOS support for addressing the on-board > > COM1 port. It is not intended (read: very unlikely) to work with USB > > dongles. > > > > If your BIOS does not support the call that it uses, then the symptoms will > > be similar to what you've seen. Unfortunately there is just not enough > > space in the MBR to implement any workarounds for this. > > > > Yeah, unless the BIOS provides traditional SIO emulation via USB (similar > idea to providing tradition AT keyboard emulation via USB) > then boot0sio won't work. It's not very feasible to put a USB > stack into the early boot loader anyways. It's somewhat possible > (at least, using a chained boot loader), but not very feasible. Erm, you guys got that one wrong. boot0sio is running on a machine without USB! It is the *other end* of the line (my laptop) where I'm using tip(1) on /dev/cuaU0. And I'm not sure if this provides the necessary signals to boot0sio to start working. So, to recap the question: Is boot0sio working with 9600 or 115200 baud for anyone on 8-CURRENT (and built with gcc 4.x)? Cheers, Ulrich Spoerlein -- It is better to remain silent and be thought a fool, than to speak, and remove all doubt.