Path: utzoo!attcan!uunet!seismo!sundc!pitstop!sun!amdcad!ames!mailrus!tut.cis.ohio-state.edu!bloom-beacon!arwall@athena.mit.edu
From: arwall@athena.mit.edu (Chumley Wood)
Newsgroups: comp.sys.ibm.pc
Subject: Re: IBM PS/2 70 vs MAC II
Message-ID: <7057@bloom-beacon.MIT.EDU>
Date: 13 Sep 88 23:10:28 GMT
References: <8X7VPiyS2k-0M0m1wg@andrew.cmu.edu> <12292@cisunx.UUCP> <5489@pasteur.Berkeley.EDU> <342@apexepa.UUCP>
Sender: daemon@bloom-beacon.MIT.EDU
Reply-To: arwall@athena.mit.edu (Chumley Wood)
Organization: Massatech Instichusetts of Tutenology
Lines: 14
In-reply-to: gary@apexepa.UUCP (Gary Wisniewski)

In article <342@apexepa.UUCP>, gary@apexepa (Gary Wisniewski) writes:
>
>Walter is correct---the Mac (even Mac II) is slower at I-O.  Although the
>SCSI interface and drives are faster, all Macs lack DMA capability.  Thus,
>any PC with a fast MFM drive will beat the Mac.  This problem extends to
>high-bandwidth network products as well.  Ethernet boards have bandwidth
>limitations on the Mac since they can't do DMA.

Well, that's almost true.  The Mac does have the DMA chip; Apple just
neglected to use it...
-- 
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| Anders Wallgren           Back by popular demand:			|
| arwall@athena.mit.edu           Bush-Noriega '88 - A Crack Team!      |