From owner-cvs-src@FreeBSD.ORG Sat Dec 3 14:48:35 2005 Return-Path: X-Original-To: cvs-src@FreeBSD.org Delivered-To: cvs-src@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 305CF16A41F; Sat, 3 Dec 2005 14:48:35 +0000 (GMT) (envelope-from ticso@cicely12.cicely.de) Received: from ant.bwct.de (ant.bwct.de [85.159.14.68]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2723043D66; Sat, 3 Dec 2005 14:48:33 +0000 (GMT) (envelope-from ticso@cicely12.cicely.de) Received: from cicely5.cicely.de ([10.1.1.7]) by ant.bwct.de (8.12.11/8.12.11) with ESMTP id jB3EmVRE020115; Sat, 3 Dec 2005 15:48:31 +0100 (CET) Received: from cicely12.cicely.de (cicely12.cicely.de [10.1.1.14]) by cicely5.cicely.de (8.13.4/8.13.4) with ESMTP id jB3EmQ9A061891 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 3 Dec 2005 15:48:27 +0100 (CET) (envelope-from ticso@cicely12.cicely.de) Received: from cicely12.cicely.de (localhost [127.0.0.1]) by cicely12.cicely.de (8.13.4/8.13.3) with ESMTP id jB3EmQY4001318; Sat, 3 Dec 2005 15:48:26 +0100 (CET) (envelope-from ticso@cicely12.cicely.de) Received: (from ticso@localhost) by cicely12.cicely.de (8.13.4/8.13.3/Submit) id jB3EmPEw001317; Sat, 3 Dec 2005 15:48:25 +0100 (CET) (envelope-from ticso) Date: Sat, 3 Dec 2005 15:48:25 +0100 From: Bernd Walter To: Peter Jeremy Message-ID: <20051203144824.GB1040@cicely12.cicely.de> References: <200512022236.jB2MaEI8090052@repoman.freebsd.org> <20051202233249.GA1299@freebie.xs4all.nl> <20051202234929.GI44012@cicely12.cicely.de> <20051203060516.GM32006@cirb503493.alcatel.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051203060516.GM32006@cirb503493.alcatel.com.au> X-Operating-System: FreeBSD cicely12.cicely.de 5.4-STABLE alpha User-Agent: Mutt/1.5.9i X-Spam-Status: No, score=-5.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.0.4 X-Spam-Report: * -3.3 ALL_TRUSTED Did not pass through any untrusted hosts * -2.6 BAYES_00 BODY: Bayesian spam probability is 0 to 1% * [score: 0.0000] X-Spam-Checker-Version: SpamAssassin 3.0.4 (2005-06-05) on cicely12.cicely.de Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, ticso@cicely.de, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/ic via6522reg.h X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: ticso@cicely.de List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Dec 2005 14:48:35 -0000 On Sat, Dec 03, 2005 at 05:05:16PM +1100, Peter Jeremy wrote: > On Sat, 2005-Dec-03 00:49:30 +0100, Bernd Walter wrote: > >Mmmm - very interesting stuff - I used the 6522 as well as the 6821 > >on many self build 6502 and 68k based systems. > ... > >But honestly - I wasn't aware that a modern computer system still uses > >them. > > You means things like nec765, i8237, NS8250, i8259, MC146818? One of No - I especially mean the 6522. I grow up with C64 and C128 plus my first self build computers used them, so there's a special relation. > my work colleagues was surprised to discover that his brand new > computer still uses peripheral chips (embedded in ASICs) that were > designed before he was born... Isn't backward compatibility a > wonderful thing :-) Only sometimes, we all know the bad sides with e.g. 8259 in modern systems. > At least back then the IC vendors would publish programming details... And by moving them to ASICs also add more bugs... I'm always surprised if someone manages to write a nec765 driver that runs on all chips. PS: to complete your list you'll have to add the 6845, 8254 and 8042. Although I have to say that the 8042 lost it's feature as a general purpose IO controler many years ago. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de