From owner-freebsd-mobile@FreeBSD.ORG Tue Jun 10 23:13:04 2003 Return-Path: Delivered-To: freebsd-mobile@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 11FBE37B401 for ; Tue, 10 Jun 2003 23:13:04 -0700 (PDT) Received: from smtp-out.comcast.net (smtp-out.comcast.net [24.153.64.115]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7925B43FAF for ; Tue, 10 Jun 2003 23:13:03 -0700 (PDT) (envelope-from garycor@comcast.net) Received: from comcast.net (pcp04279996pcs.union01.nj.comcast.net [68.39.103.49]) by mtaout02.icomcast.net (iPlanet Messaging Server 5.2 HotFix 1.16 (built May 14 2003)) with ESMTP id <0HGA00FYPZXQP4@mtaout02.icomcast.net> for freebsd-mobile@freebsd.org; Wed, 11 Jun 2003 02:13:02 -0400 (EDT) Date: Wed, 11 Jun 2003 02:13:04 -0400 From: Gary Corcoran To: Andy Sparrow Message-id: <3EE6C870.FB1A7FE7@comcast.net> MIME-version: 1.0 X-Mailer: Mozilla 4.79 [en] (Windows NT 5.0; U) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT X-Accept-Language: en References: <20030611035011.54DBF1E0@CRWdog.demon.co.uk> cc: culley@fastmail.fm cc: freebsd-mobile@freebsd.org Subject: Re: FreeBSD laptop with: 56k modem, ethernet, Xfree86 X-BeenThere: freebsd-mobile@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Mobile computing with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Jun 2003 06:13:04 -0000 Andy Sparrow wrote: > > Ironically enough, although they no longer ship a Lucent modem, IBM used > to, ... > and the ltmdm port works fine[0]. > [0] This superb piece of work is actually a loader that loads a software > image into the modem and then "talks" to it for you, if I understand > correctly - it's more like a "softmodem" than a "winmodem". CPU load is > not noticably increased at all with a PIII-600. You have your terminology backwards. A "softmodem" is when the realtime DSP functions are performed on your CPU, taking a good chunk of it. The "ltmodems" are so-called "winmodems", where the CPU just takes the place of the "controller", which handles things like interpreting the "AT" commands, and was typically something like a little Z-80 microprocessor (remember those? :) on-chip. So you can see that it takes next-to-nothing of a modern Pentium CPU to handle that, which is why you don't notice any increase in load with a "ltmodem"... Gary