From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 28 Aug 2001 17:55:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 28 Aug 2001 17:55:32 -0400 Received: from neon-gw-l3.transmeta.com ([63.209.4.196]:47376 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id ; Tue, 28 Aug 2001 17:55:16 -0400 To: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Subject: Re: Treating parallel port as serial device Date: 28 Aug 2001 14:55:04 -0700 Organization: Transmeta Corporation, Santa Clara CA Message-ID: <9mh3vo$q9m$1@cesium.transmeta.com> In-Reply-To: <9mgtpb$mf4$1@sisko.my.home> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Disclaimer: Not speaking for Transmeta in any way, shape, or form. Copyright: Copyright 2001 H. Peter Anvin - All Rights Reserved Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Followup to: <9mgtpb$mf4$1@sisko.my.home> By author: "Tony Hoyle" In newsgroup: linux.dev.kernel > > I'm looking to attach a serial device to my box that has only TTL level > I/O. Since I'm more of a software than a hardware person making a > circuit board up with a max232 in is a bit risky... I want to connect > the I/O to the parallel port. > Most RS232 boards accept TTL level input, so your only problem is output. You may want to simply construct a level converter, such as a voltage divider or zener diode on your input. -hpa -- at work, in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt