From owner-freebsd-current Thu Apr 16 09:45:54 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id JAA14018 for freebsd-current-outgoing; Thu, 16 Apr 1998 09:45:54 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from jumping-spider.aracnet.com (root@jumping-spider.aracnet.com [205.159.88.14]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA13970 for ; Thu, 16 Apr 1998 16:45:37 GMT (envelope-from beattie@aracnet.com) Received: from shell2.aracnet.com (shell2.aracnet.com [205.159.88.20]) by jumping-spider.aracnet.com (8.8.5/8.8.5) with ESMTP id JAA03143; Thu, 16 Apr 1998 09:45:20 -0700 Received: from localhost by shell2.aracnet.com (8.8.7) id JAA04647; Thu, 16 Apr 1998 09:45:20 -0700 Date: Thu, 16 Apr 1998 09:45:20 -0700 (PDT) From: Brian Beattie To: Tom cc: Kerry Morse , "'freebsd-current@FreeBSD.ORG'" Subject: Re: Help - please... Adaptec 1542 and Exabyte tape problem... In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wed, 15 Apr 1998, Tom wrote: > > On Thu, 16 Apr 1998, Kerry Morse wrote: > > > Apr 16 13:35:05 proxy /kernel: aha0: DMA beyond end Of ISA: 0x357cd10 > > Bounce buffers are required to DMA above the 16MB for ISA devices. > However, bounce buffers do not work for the aha driver (it is unclear > whether the driver or the bounce buffers are broken). > > This is any old problem. See the archives. It seems that any developer > who has more than 16MB of RAM has also decided to upgrade to non-ISA > controllers. > I am planning to implement the aha1542 controller under the new CAM interface. I have more than 16MB and plan to ensure bounce buffers work. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message