From owner-freebsd-questions Wed Dec 4 09:57:19 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id JAA11663 for questions-outgoing; Wed, 4 Dec 1996 09:57:19 -0800 (PST) Received: from mail11.digital.com (mail11.digital.com [192.208.46.10]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id JAA11657 for ; Wed, 4 Dec 1996 09:57:17 -0800 (PST) From: garyj@frt.dec.com Received: from cssmuc.frt.dec.com by mail11.digital.com (8.7.5/UNX 1.5/1.0/WV) id MAA01819; Wed, 4 Dec 1996 12:47:26 -0500 (EST) Received: from localhost by cssmuc.frt.dec.com; (5.65v3.2/1.1.8.2/14Nov95-0232PM) id AA10824; Wed, 4 Dec 1996 18:47:07 +0100 Message-Id: <9612041747.AA10824@cssmuc.frt.dec.com> X-Mailer: exmh version 1.6.4 10/10/95 To: mikebo@tellabs.com Cc: questions@freebsd.org In-Reply-To: Message from mikebo@tellabs.com of Wed, 04 Dec 96 10:57:29 CST. Reply-To: gjennejohn@frt.dec.com Subject: Re: 2.1.5R: aha0: DMA beyond end of ISA ? Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 04 Dec 96 18:47:07 +0100 X-Mts: smtp Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk mikebo@tellabs.com writes: [delete] > Anyway, now every time I try to access the tape drives, I get: > aha0: DMA beyond end of ISA: 0x19cc0a0 > st1: bad request, must be between 0 and 0 > tar: read error on /dev/rst1: Input/Output error > [delete] > -------------------------------------------------------------------------- > FreeBSD 2.1.5-RELEASE #0: Sat Nov 30 19:19:25 CST 1996 > kroot@timesink.ttl.com:/usr/src/sys/compile/TIMESINK > CPU: 132-MHz Pentium 735\\90 or 815\\100 (Pentium-class CPU) > Origin = "GenuineIntel" Id = 0x52c Stepping=12 > Features=0x1bf > real memory = 67108864 (65536K bytes) > avail memory = 63885312 (62388K bytes) [delete] you need to enable bounce buffers, the ISA bus has only 24 bits and can only address 16MB. You have 64 MB. Add options BOUNCE_BUFFERS to your kernel coniguration file and make a new kernel. --- Gary Jennejohn (work) gjennejohn@frt.dec.com (home) Gary.Jennejohn@munich.netsurf.de (play) gj@freebsd.org