*BSD News Article 29672


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Newsgroups: comp.os.386bsd.questions
Path: sserve!newshost.anu.edu.au!munnari.oz.au!bunyip.cc.uq.oz.au!harbinger.cc.monash.edu.au!msuinfo!agate!dog.ee.lbl.gov!newshub.nosc.mil!nosc!pegasus!richard
From: richard@pegasus.com (Richard Foulk)
Subject: Re: AHA1542 hanging with FreeBSD 1.1beta
References: <Co3MBA.s3@pegasus.com>
Organization: Pegasus Information Systems
Date: Fri, 15 Apr 1994 11:20:35 GMT
Message-ID: <CoAsut.8K@pegasus.com>
Lines: 27

>I have a 486/66 with an AHA1542CF SCSI card that locks up about
>once a day with the disk activity light on.
>
>Does this sound familiar to anyone?
>
>The system sees a lot of disk activity and the lockups don't seem
>to be caused by any one particular program.  I've tried various
>speed settings, etc., too no avail.
>
>Do I need to buy some other type of card?  A new motherboard?
>

I got a helpful email response explaining that this controller
allocates a buffer at the top of 16Megs which gets in the way if
you have 16Megs of RAM, and consequently causes lockups.

My systems has 16Megs.  Telling the BIOS that you have 15Megs is
supposed to fix the problem.  Problem is my BIOS (AMI) doesn't
seem to want to let me change that parameter.

What's the proper way to tell FreeBSD not to use the last meg?


Thanks

Richard