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Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!yeshua.marcam.com!MathWorks.Com!europa.eng.gtefsd.com!howland.reston.ans.net!math.ohio-state.edu!jussieu.fr!centre.univ-orleans.fr!univ-lyon1.fr!frmug.fr.net!renux.frmug.fr.net!keltia.frmug.fr.net!not-for-mail From: roberto@keltia.frmug.fr.net (Ollivier Robert) Newsgroups: comp.os.386bsd.questions Subject: Re: Buslogic 742A & >16M RAM Date: 3 Apr 1994 23:04:15 +0200 Organization: A Happy FreeBSD-current Usenet Site Lines: 21 Message-ID: <2nnb0t$1fh@keltia.frmug.fr.net> References: <QhbWmK600iM8Q0YJoE@andrew.cmu.edu> NNTP-Posting-Host: keltia.frmug.fr.net Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit In article <QhbWmK600iM8Q0YJoE@andrew.cmu.edu>, Timothy J Kniveton <tim+@CMU.EDU> wrote: >it seems that the buslogic emulates isa operation, which would mean >that it uses DMA address space of only 24 bits, right? which would >mean that it can only deal w/ 16M. is it true that buslogic 742A can >only deal with 16M memory? It depends on how you are using it. If you're using the Buslogic in 154x compatibility mode (with the AHA driver), then you're limited to ISA bus operations thus 16 MB. In a EISA system it is plain stupid. So use your BT742A with the BT driver which enable you to use all the memory of your EISA system. I'm using a 747S and I'm sure the day I'll put more than 16 MB it my computer it will work as ever. -- Ollivier ROBERT Ollivier.Robert@keltia.frmug.fr.net A FreeBSD & PERL addict... PGP 2.3a public key on key-servers Running FreeBSD-current and very happy to do so !