Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!ucsd!ucbvax!pro-generic.cts.com!ericmcg
From: ericmcg@pro-generic.cts.com (Eric Mcgillicuddy)
Newsgroups: comp.sys.apple
Subject: Re: Really small question
Message-ID: <8916.infoapple.net@pro-generic>
Date: 21 Dec 89 05:46:36 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
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In-Reply-To: message from nicholaA@batman.moravian.EDU

DMA controllers take 3 cycles/word (8bits, 16, whatever), plus 7+ cycles for
setup. This surprised me, maybe newer controllers are faster. 
BTW I didn't know the GS used DMA for Memory access. How do you access it?
i.e. where are the control registers Mapped?