From owner-freebsd-alpha Wed Jul 19 5:40:55 2000 Delivered-To: freebsd-alpha@freebsd.org Received: from lh2.rdc1.tx.home.com (ha2.rdc1.tx.home.com [24.4.0.67]) by hub.freebsd.org (Postfix) with ESMTP id D230237BF34; Wed, 19 Jul 2000 05:40:52 -0700 (PDT) (envelope-from miklic@attglobal.net) Received: from attglobal.net ([24.10.140.87]) by lh2.rdc1.tx.home.com (InterMail vM.4.01.02.00 201-229-116) with ESMTP id <20000719124052.URAT13510.lh2.rdc1.tx.home.com@attglobal.net>; Wed, 19 Jul 2000 05:40:52 -0700 Message-ID: <3975A28F.963347D5@attglobal.net> Date: Wed, 19 Jul 2000 06:43:59 -0600 From: "Andrew M. Miklic" X-Mailer: Mozilla 4.73 [en] (X11; U; FreeBSD 4.1-RC alpha) X-Accept-Language: en MIME-Version: 1.0 To: Mark Abene Cc: "Andrew M. Miklic" , wilko@FreeBSD.ORG, FreeBSD-alpha mailing list Subject: Re: parallel ports on alpha in 4.1? References: <20000718201356.C2427@freebie.demon.nl> <3974A0E1.D7723C01@ibm.net> <20000718184319.D18832@radicalmedia.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > I'm curious when you say more work was involved to use port 0x278 on the > NatSemi chip. Is it not like the SMSC chip where you can simply tell it > any i/o port you want? In short, no. Basically, there are 5 "modes" that you can put the PC873xx SuperI/O chips into, and these modes correspond to an address/irq combination. 2 of the 5 modes assume by default irq7, or can be told to assume for irq7 by default (corresponding to the address 0x3bc and 0x378), another assumes 0x278 but irq5, and the other 2 assume the defaults of irq7 with addresses of 0x278 and 0x378, but requires another bit to be twiddled, and I have not looked much at the functionality/implications of such a bit (and the current driver, as I found it, did not utilize the bit yet at all)... Andrew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message