From owner-freebsd-questions Sun Oct 12 13:13:01 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id NAA12660 for questions-outgoing; Sun, 12 Oct 1997 13:13:01 -0700 (PDT) (envelope-from owner-freebsd-questions) Received: from michelle.esfm.ipn.mx (Michelle.esfm.ipn.mx [148.204.104.23]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id NAA12655 for ; Sun, 12 Oct 1997 13:12:58 -0700 (PDT) (envelope-from mrspock@esfm.ipn.mx) Received: from localhost (mrspock@localhost) by michelle.esfm.ipn.mx (8.8.5/8.8.5) with SMTP id PAA04914 for ; Sun, 12 Oct 1997 15:12:09 -0500 (CDT) X-Authentication-Warning: michelle.esfm.ipn.mx: mrspock owned process doing -bs Date: Sun, 12 Oct 1997 15:12:09 -0500 (CDT) From: Eduardo Viruena Silva To: freebsd-questions@FreeBSD.ORG Subject: Serial Ports' IRQ and ports. Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk 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 ? Do I have to specify a different IRQ level for each port ? Thank you in advance. ______ _ * / / \ / \ __ /\ /\ * / ./ \ * \__|_/ | | / \/ \ | b | * _ | __ | | __ = .. \____ \ \_\ / / \| / \ | | /\_\/ = \_| * \___\___/ * \_/\_/\__/\__\/_/\__/ = \______/ _ | |