From owner-freebsd-questions Sun Oct 12 16:31:56 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id QAA27723 for questions-outgoing; Sun, 12 Oct 1997 16:31:56 -0700 (PDT) (envelope-from owner-freebsd-questions) Received: from freebie.lemis.com (gregl1.lnk.telstra.net [139.130.136.133]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id QAA27718 for ; Sun, 12 Oct 1997 16:31:51 -0700 (PDT) (envelope-from grog@freebie.lemis.com) Received: (from grog@localhost) by freebie.lemis.com (8.8.7/8.8.5) id JAA13273; Mon, 13 Oct 1997 09:01:42 +0930 (CST) Message-ID: <19971013090141.09693@lemis.com> Date: Mon, 13 Oct 1997 09:01:41 +0930 From: Greg Lehey To: Eduardo Viruena Silva Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Serial Ports' IRQ and ports. References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.84e In-Reply-To: ; from Eduardo Viruena Silva on Sun, Oct 12, 1997 at 03:12:09PM -0500 Organisation: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8250 Fax: +61-8-8388-8250 Mobile: +61-41-739-7062 WWW-Home-Page: http://www.lemis.com/~grog Fight-Spam-Now: http://www.cauce.org Sender: owner-freebsd-questions@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Sun, Oct 12, 1997 at 03:12:09PM -0500, Eduardo Viruena Silva wrote: > > Hello there. > > I have a doubt about serial ports IRQs. > > Serial Ports are configurated according to the following table: > > FreeBSD MS-DOS io-address MS-DOS's IRQ > sio0 com1 0x3f8 4 > sio1 com2 0x2f8 3 > sio2 com3 0x3e8 4 > sio3 com4 0x2e8 3 > > But using the same IRQ for ports 0 & 2 or 2 & 3 causes kernel > configuration utility displays: "CONF" warning. > > Can the interrupt service routines distinguish which port is requiring > attention if I give the configuration in the table to the serial > ports ? No. > Do I have to specify a different IRQ level for each port ? Yes. It's not just a question of specifying an IRQ, you also have to set the boards accordingly. Greg