From owner-freebsd-current Wed Feb 19 23:56:50 2003 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 CE6A237B401; Wed, 19 Feb 2003 23:56:48 -0800 (PST) Received: from watery.cc.kogakuin.ac.jp (watery.cc.kogakuin.ac.jp [133.80.152.80]) by mx1.FreeBSD.org (Postfix) with ESMTP id B9EB043F85; Wed, 19 Feb 2003 23:56:47 -0800 (PST) (envelope-from nyan@jp.FreeBSD.org) Received: from localhost (localhost [IPv6:::1]) by watery.cc.kogakuin.ac.jp (8.12.6/8.12.6) with ESMTP id h1K7uZxR077839; Thu, 20 Feb 2003 16:56:35 +0900 (JST) (envelope-from nyan@jp.FreeBSD.org) Date: Thu, 20 Feb 2003 16:55:55 +0900 (JST) Message-Id: <20030220.165555.112582534.nyan@jp.FreeBSD.org> To: imp@bsdimp.com Cc: peter@wemm.org, sos@FreeBSD.ORG, current@FreeBSD.ORG, mdodd@FreeBSD.ORG Subject: Re: The cbus driver for pc98 From: Takahashi Yoshihiro In-Reply-To: <20030217.103016.58455672.imp@bsdimp.com> References: <20030217070601.78E612A89E@canning.wemm.org> <20030217.173114.85351300.nyan@jp.FreeBSD.org> <20030217.103016.58455672.imp@bsdimp.com> X-Mailer: Mew version 3.1 on Emacs 21.2 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In article <20030217.103016.58455672.imp@bsdimp.com> "M. Warner Losh" writes: > Cbus is to ISA as CardBus is to PCI in many ways. Cbus is very much > like ISA in all but a few details. CardBus is pci with a few twists > and turns that differ. If you look at how we've implemented cardbus, > you'll see that we've tried to do it as a 'subclass' of the pci bus. > We implement the PCI interfaces in the cardbus bus code, even though > it is not really a pci bus. I'd propose that cbus implements the ISA > interfaces in a similar manner. If my understanding is not a mistake, the CardBus specifications is derived from the PCI. Therefore, I can understand that the cardbus driver depend on the pci driver. But, the Cbus is NOT derived from the ISA. So, I think that the cbus driver should not depend on the isa driver. --- TAKAHASHI Yoshihiro To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message