From owner-freebsd-mobile Fri Oct 24 08:11:53 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id IAA25926 for mobile-outgoing; Fri, 24 Oct 1997 08:11:53 -0700 (PDT) (envelope-from owner-freebsd-mobile) Received: from coconut.itojun.org (root@coconut.itojun.org [210.160.95.97]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id IAA25921 for ; Fri, 24 Oct 1997 08:11:49 -0700 (PDT) (envelope-from itojun@itojun.org) Received: from localhost (itojun@localhost.itojun.org [127.0.0.1]) by coconut.itojun.org (8.8.5/3.6Wbeta6) with ESMTP id AAA22064; Sat, 25 Oct 1997 00:11:34 +0900 (JST) To: William Bulley cc: mobile@FreeBSD.ORG In-reply-to: web's message of Fri, 24 Oct 1997 10:18:46 -0400. <199710241418.KAA04444@ohm.merit.edu> X-Template-Reply-To: itojun@itojun.org X-Template-Return-Receipt-To: itojun@itojun.org X-PGP-Fingerprint: F8 24 B4 2C 8C 98 57 FD 90 5F B4 60 79 54 16 E2 Subject: Re: new topic! IR support From: Jun-ichiro itojun Itoh Date: Sat, 25 Oct 1997 00:11:34 +0900 Message-ID: <22060.877705894@coconut.itojun.org> Sender: owner-freebsd-mobile@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk >Does FreeBSD have any support for the IR hardware found on several >(most?) modern laptop units? I will admit publicly to not having >RTFM'd for this answer and I apologize in advance for wasting the >bandwidth if this turns out to be a simple RTFM issue... :-) If you configure BIOS setup and kernel config file properly, you can use IR port port as half-duplex serial port, on most machines (NOTE: baudrate for the IR port must be <= 1Mbps). However, the IR port has very strange behavior if we see it as a serial port: if the both party transmit a character at the same time, the character will be lost due to the shared medium nature. (yes, the air) Using IR port as over-1Mbps device (such as 4Mbps) requires some hack. In that case IR port must be used as HDLC device (varies by chipset, I believe). itojun