From owner-freebsd-hardware Wed May 21 07:47:56 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id HAA13816 for hardware-outgoing; Wed, 21 May 1997 07:47:56 -0700 (PDT) Received: from mccomm.nl (root@gateppp.mccomm.nl [193.67.87.1]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id HAA13811 for ; Wed, 21 May 1997 07:47:53 -0700 (PDT) Received: from hpserver.mccomm.nl (hpserver.mccomm.nl [193.67.87.13]) by mccomm.nl (8.7.5/8.7.3) with SMTP id QAA05321 for ; Wed, 21 May 1997 16:47:33 +0200 Message-Id: <199705211447.QAA05321@mccomm.nl> Received: by hpserver.mccomm.nl (1.38.193.5/16.2) id AA27964; Wed, 21 May 1997 16:47:33 +0200 From: Rob Schofield Subject: Re: isa bus and boca multiport boards To: freebsd-hardware@freebsd.org (Hardware list at FreeBSD) Date: Wed, 21 May 97 16:47:32 METDST In-Reply-To: <970521090243.22a1ce87@wofford.edu>; from "Dan Welch" at May 21, 97 9:02 am Mailer: Elm [revision: 70.85.2.1] Sender: owner-hardware@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > > >> > And, IRQ 12 is used for PS/2 mouse ports built into motherboards. > >> > >> I used the cmos setup to turn that off. Is that reliable? > > > > No. I've seen myself that disabling PS/2 mouse > > in BIOS doesn't leave IRQ12 for you -- last time > > that was on Packard Bell 486 box, with Phoenix BIOS, > > when we tried to install second AHA-1542 in it. > > > > Despite of disabling PS/2 in BIOS, 1542 did all kinds > > of strange and mysterious things ("going to polling > > mode", loosing interrupts, etc.) until we moved it > > from IRQ12 to some other one. > > Just as I feared ... thanks for sharing your experience. > Errr... I hate to say this, but isn't this just a teensy-weensy bit subjective? *One* problem on *one* system means that all systems react the same way? I have successfully operated the same ethernet and RAID cards on interrupt 12 in three seperate systems without any trouble. If you read the PS/2 documentation, it detaches the IRQ line from the built in bus-mouse hardware by disabling a buffer. This is how it works in *PS/2 SYSTEMS ONLY*. How it works in any other system is undefined unless you contact the manufacturer and confirm it... ;^) Rob -- Witticisms are hard to define on Monday mornings... schofiel@xs4all.nl http://www.xs4all.nl/~schofiel rschof@mccomm.nl