From owner-freebsd-stable@FreeBSD.ORG  Sat Sep 20 12:10:31 2003
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 1718216A4C0
	for <freebsd-stable@freebsd.org>;
	Sat, 20 Sep 2003 12:10:31 -0700 (PDT)
Received: from arg1.demon.co.uk (arg1.demon.co.uk [62.49.12.213])
	by mx1.FreeBSD.org (Postfix) with ESMTP id ABC3143FCB
	for <freebsd-stable@freebsd.org>;
	Sat, 20 Sep 2003 12:10:29 -0700 (PDT)
	(envelope-from arg-bsd@arg.me.uk)
Received: by arg1.demon.co.uk (Postfix, from userid 1002)
	id 82FCE9B32; Sat, 20 Sep 2003 20:10:26 +0100 (BST)
Received: from localhost (localhost [127.0.0.1])
	by arg1.demon.co.uk (Postfix) with ESMTP
	id 7EB0D5D0D; Sat, 20 Sep 2003 20:10:26 +0100 (BST)
Date: Sat, 20 Sep 2003 20:10:26 +0100 (BST)
From: Andrew Gordon <arg-bsd@arg.me.uk>
X-X-Sender: freebsd@server.arg.sj.co.uk
To: Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?= <des@des.no>
In-Reply-To: <xzpn0czec43.fsf@dwp.des.no>
Message-ID: <20030920200224.B33574@server.arg.sj.co.uk>
References: <87fzisoi53.fsf@strauser.com>
	<200309201340.02453.ianjhart@ntlworld.com>
	<200309201551.19467.ianjhart@ntlworld.com>
	<xzpn0czec43.fsf@dwp.des.no>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=iso-8859-1
Content-Transfer-Encoding: 8BIT
cc: freebsd-stable@freebsd.org
Subject: Re: HP Laserjet 1200 on USB
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Production branch of FreeBSD source code
	<freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 20 Sep 2003 19:10:31 -0000



On Sat, 20 Sep 2003, Dag-Erling [iso-8859-1] Smørgrav wrote:
>
> 20 MB in five minutes is very close to the maximum transfer rate
> across a paralell port (~80 kBps).

You can do much better than that in ECP mode - I use it to transfer
2Mbit/sec video to a piece of custom hardware hung of the parallel port
(standard drivers at the FreeBSD end), so I'm getting over 250KByte/sec.

However, the GENERIC kernel isn't configured for this - you need to add
the DRQ setting:

device          ppc0    at isa? irq 7 drq 3

and make sure that the BIOS is configured to match.  After that,
lptcontrol -e engages DMA-driven printing, with much greater speed and
lower CPU utilisation.