Date: Thu, 24 Sep 1998 15:55:01 +1000 From: Peter Jeremy <peter.jeremy@auss2.alcatel.com.au> To: tarkhil@asteroid.svib.ru Cc: freebsd-hardware@FreeBSD.ORG Subject: Re: PPP over LPT and EPP mode Message-ID: <98Sep24.155439est.40380@border.alcanet.com.au>
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Alex Povolotsky <tarkhil@asteroid.svib.ru> 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
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