Date: Sat, 20 Sep 2003 20:10:26 +0100 (BST) From: Andrew Gordon <arg-bsd@arg.me.uk> To: Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?= <des@des.no> Cc: freebsd-stable@freebsd.org Subject: Re: HP Laserjet 1200 on USB Message-ID: <20030920200224.B33574@server.arg.sj.co.uk> In-Reply-To: <xzpn0czec43.fsf@dwp.des.no> References: <87fzisoi53.fsf@strauser.com> <200309201340.02453.ianjhart@ntlworld.com> <200309201551.19467.ianjhart@ntlworld.com> <xzpn0czec43.fsf@dwp.des.no>
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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.
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