From owner-freebsd-hardware Wed Sep 23 22:55:25 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id WAA04415 for freebsd-hardware-outgoing; Wed, 23 Sep 1998 22:55:25 -0700 (PDT) (envelope-from owner-freebsd-hardware@FreeBSD.ORG) Received: from alcanet.com.au (border.alcanet.com.au [203.62.196.10]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id WAA04404 for ; Wed, 23 Sep 1998 22:55:18 -0700 (PDT) (envelope-from peter.jeremy@auss2.alcatel.com.au) Received: by border.alcanet.com.au id <40380>; Thu, 24 Sep 1998 15:54:39 +1000 Date: Thu, 24 Sep 1998 15:55:01 +1000 From: Peter Jeremy Subject: Re: PPP over LPT and EPP mode To: tarkhil@asteroid.svib.ru Cc: freebsd-hardware@FreeBSD.ORG Message-Id: <98Sep24.155439est.40380@border.alcanet.com.au> Sender: owner-freebsd-hardware@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Alex Povolotsky wrote: >Does PPP over LPT utilize byte-oriented exchange with FIFO, possible with >parralel port in EPP mode? Definitely no in -stable. It uses nybble mode transfers with a laplink-style cable. I'm not sure if anyone has implemented it in the ppbus device in -current (last time I brought up the subject in -hackers, no-one seemed to be working on it). The major problem with byte-wide transfers is that the port becomes half-duplex (it can't simultaneously read and write). This means that you need to add appropriate hand-shaking to resolve (or prevent) contention. This probably means a changing the driver to master- slave. Peter -- Peter Jeremy (VK2PJ) peter.jeremy@alcatel.com.au Alcatel Australia Limited 41 Mandible St Phone: +61 2 9690 5019 ALEXANDRIA NSW 2015 Fax: +61 2 9690 5247 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message