From owner-freebsd-doc@FreeBSD.ORG Tue Oct 28 02:34:43 2003 Return-Path: Delivered-To: freebsd-doc@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 69D8616A4CE for ; Tue, 28 Oct 2003 02:34:43 -0800 (PST) Received: from gandalf.online.bg (gandalf.online.bg [217.75.128.9]) by mx1.FreeBSD.org (Postfix) with SMTP id 9480543F75 for ; Tue, 28 Oct 2003 02:34:41 -0800 (PST) (envelope-from roam@ringlet.net) Received: (qmail 24916 invoked from network); 28 Oct 2003 10:33:51 -0000 Received: from office.sbnd.net (HELO straylight.ringlet.net) (217.75.140.130) by gandalf.online.bg with SMTP; 28 Oct 2003 10:33:50 -0000 Received: (qmail 4697 invoked by uid 1000); 28 Oct 2003 10:34:25 -0000 Date: Tue, 28 Oct 2003 12:34:25 +0200 From: Peter Pentchev To: Marc Fonvieille Message-ID: <20031028103425.GV430@straylight.oblivion.bg> Mail-Followup-To: Marc Fonvieille , "Devon H. O'Dell" , freebsd-doc@freebsd.org References: <3F9DF133.3000104@sitetronics.com> <20031028082305.GA583@nosferatu.blackend.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="FwyhczKCDPOVeYh6" Content-Disposition: inline In-Reply-To: <20031028082305.GA583@nosferatu.blackend.org> User-Agent: Mutt/1.5.4i cc: freebsd-doc@freebsd.org Subject: Re: Printer Setup (11.3.1.1.1) X-BeenThere: freebsd-doc@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Documentation project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 28 Oct 2003 10:34:43 -0000 --FwyhczKCDPOVeYh6 Content-Type: text/plain; charset=windows-1251 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Oct 28, 2003 at 09:23:05AM +0100, Marc Fonvieille wrote: > On Tue, Oct 28, 2003 at 05:31:47AM +0100, Devon H. O'Dell wrote: > > In this section there's the text: > > In general, serial interfaces are slower than parallel interfaces.=20 > > Parallel interfaces usually offer just one-way communication (computer= =20 > > to printer) while serial gives you two-way. Many newer parallel ports= =20 > > and printers can communicate in both directions under FreeBSD when a=20 > > IEEE1284 compliant cable is used. > >=20 > > Shouldn't the second sentence s/serial/parallel/ s/Parallel/serial/ ? > > >=20 > Ok, I fixed it in revision 1.79 of the chapter, Thanks! Errrr... I'm not sure it needed fixing :) Rather, IMHO rev. 1.79 might need to be reverted. Historically, parallel ports did indeed offer only one-way communication: the computer sent data to the printer, and that was it. Then things like EPP (the extended printer port) interface and friends were developed, and the parallel port grew two-way communication, too - this is exactly what the *last* sentence is talking about (EPP and ECP were standardized in IEEE 1284, http://www.fapo.com/ieee1284.htm for more info). Serial port communications have always been two-way, AFAIK, albeit some of them were just half-duplex, so only one side could talk at a time. Thus, I think the text was correct as it was, before rev. 1.79 - parallel ports were once only capable of one-way communication, but with IEEE 1284 (EPP, ECP) they can do two-way now, while serial ports have always been capable of two-way communication. G'luck, Peter --=20 Peter Pentchev roam@ringlet.net roam@sbnd.net roam@FreeBSD.org PGP key: http://people.FreeBSD.org/~roam/roam.key.asc Key fingerprint FDBA FD79 C26F 3C51 C95E DF9E ED18 B68D 1619 4553 "yields falsehood, when appended to its quotation." yields falsehood, when = appended to its quotation. --FwyhczKCDPOVeYh6 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (FreeBSD) iD8DBQE/nkYx7Ri2jRYZRVMRAtClAJ90m01XT8l20CULxIASXny32/YTUACfRI2q gmLdEs9+ALXnJ7l0hsgkIRM= =QbVY -----END PGP SIGNATURE----- --FwyhczKCDPOVeYh6--