Return to BSD News archive
Xref: sserve comp.unix.bsd.freebsd.misc:2882 comp.periphs.scsi:34032
Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!simtel!news.sprintlink.net!howland.reston.ans.net!Germany.EU.net!nntp.gmd.de!nntp.darmstadt.gmd.de!news.th-darmstadt.de!fauern!news.tu-chemnitz.de!irz401!uriah.heep!bonnie.heep!not-for-mail
From: j@bonnie.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc,comp.periphs.scsi
Subject: Re: Adaptec 1542C for $125CDN -- comments?
Date: 5 Jul 1995 09:10:15 +0200
Organization: Private U**x site, Dresden.
Lines: 23
Message-ID: <3tddsn$dsc@bonnie.tcd-dresden.de>
References: <rrwood-2106951636420001@bpci.net3.io.org> <3t01b9$m0i@panix.com> <3t87g5$2ro@bonnie.tcd-dresden.de> <3t9rft$g9o@panix.com>
Reply-To: joerg_wunsch@uriah.heep.sax.de
NNTP-Posting-Host: 192.109.108.139
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
John Brock <jbrock@panix.com> wrote:
>I'm not sure whether you are disagreeing with my point, which is that
>there is no problem here. PCI may indeed work better, but the
>busmastering ISA SCSI adapters made by Adaptec and others WILL work on
>PCs with more than 16MB of RAM. ALL drivers for these cards will
>routinely use the bounce buffer trick whenever necessary, and to write
>a driver any other way would be incompetent. At least this is what I
>gathered from the responses to my query.
I'm only disagreeing in that it seems to be silly to me these days for
someone who is going to buy a machine with 32 or more Megs of RAM, to
stick with such an ancient ISA board.
ALL drivers? I think NetBSD still doesn't do bounce-buffering, and i
don't know the status of Linux. OS/2 (AFAIK) uses all memory above 16
MB only as disk cache and not as application memory, to work around
such problems.
--
cheers, J"org private: joerg_wunsch@uriah.heep.sax.de
http://www.sax.de/~joerg/
Never trust an operating system you don't have sources for. ;-)