Return to BSD News archive
Path: sserve!newshost.anu.edu.au!munnari.oz.au!bruce.cs.monash.edu.au!merlin!mel.dit.csiro.au!its.csiro.au!dmssyd.syd.dms.CSIRO.AU!metro!news.cs.su.oz.au!harbinger.cc.monash.edu.au!yeshua.marcam.com!usc!howland.reston.ans.net!vixen.cso.uiuc.edu!newsrelay.iastate.edu!news.iastate.edu!ponderous.cc.iastate.edu!michaelv
From: michaelv@iastate.edu (Michael L. VanLoon)
Newsgroups: comp.os.386bsd.questions
Subject: Re: What SCSI card for 32meg P560?
Date: 19 Mar 94 07:33:47 GMT
Organization: Iowa State University, Ames, Iowa
Lines: 34
Message-ID: <michaelv.764062427@ponderous.cc.iastate.edu>
References: <MARK.878.2D88ABD9@novell.business.uwo.ca> <1994Mar18.040251.23335@resonex.com>
NNTP-Posting-Host: ponderous.cc.iastate.edu
In <1994Mar18.040251.23335@resonex.com> zenon@resonex.com (Zenon Fortuna) writes:
>In article <MARK.878.2D88ABD9@novell.business.uwo.ca> MARK@novell.business.uwo.ca (Mark_Bramwell) writes:
>>Since everyone thinks my problem with a P5-60 and 32megs of ram is the scsi
>>board -> adaptec 1540.
>>
>>What scsi boards are supported now with 32megs of ram?
>>
>>I don't mind buying another scsi card. The 'install.notes' have a few boards
>>listed but I was wondering if they all work without and strange bugs/features.
>>
>In other words it may happen, that you have somewhere *imbalance* on your
>slots which cause problems on SCSI or your memory.
No, this is not his problem. (I assume, posting here, that he is
running one of the free BSD's.) The ISA bus does not address anything
above 16meg (only 24 address lines). You need to have a EISA, PCI, or
VLB bus card to access anything higher (32 address lines).
Linux uses bounce buffers where it copies stuff above 16meg to a lower
address for the ISA DMA. While this allows ISA cards to work in more
memory, both the copying, and ISA itself are significantly slower than
just running a 32-bit card that does addressing properly and runs
faster than 8MHz, the speed of the ISA bus. Most people I know prefer
to spend just that little extra and get hardware that works right.
--
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Michael L. VanLoon Iowa State University Computation Center
michaelv@iastate.edu Project Vincent Systems Staff
Free your mind and your machine -- NetBSD free Un*x for PC/Mac/Amiga/etc.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -