From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 5 Jun 2001 05:28:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 5 Jun 2001 05:27:59 -0400 Received: from cisco7500-mainGW.gts.cz ([194.213.32.131]:33029 "EHLO bug.ucw.cz") by vger.kernel.org with ESMTP id ; Tue, 5 Jun 2001 05:27:43 -0400 Date: Mon, 4 Jun 2001 12:27:11 +0000 From: Pavel Machek To: Pete Zaitcev Cc: green@linuxhacker.ru, Alan Cox , linux-kernel@vger.kernel.org Subject: Re: Linux 2.4.5-ac7 Message-ID: <20010604122708.B33@toy.ucw.cz> In-Reply-To: <200106032051.f53Kpgg10681@devserv.devel.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0.1i In-Reply-To: <200106032051.f53Kpgg10681@devserv.devel.redhat.com>; from zaitcev@redhat.com on Sun, Jun 03, 2001 at 04:51:42PM -0400 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > > How about ISA USB host controllers? > > Those, unfortunately, do not exist. I was shopping for one > in vain for a long time. One formiddable difficulty is that > USB bandwidth is larger than ISA, so the only feasible way > to make a HC is to have all TD's in its onboard memory, > as in VGA. USB is 1.2MB/sec while 8-bit ISA is 4MB/sec (memory-mapped). ...and OHCI does use board memory, anyway. Pavel -- Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt, details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.