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From: phd_ivo@gsbacd.uchicago.edu
Newsgroups: comp.sys.next
Subject: Re: DMA Channels:  Where'd they go?
Message-ID: <1990Sep25.054941.5893@midway.uchicago.edu>
Date: 25 Sep 90 04:46:40 GMT
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Organization: University of Chicago Graduate School of Business
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>Good question. I guess the difference between the slab and the cube
>lies in the missing OD support for the slab. But what happened to the
>3 others I can't tell.

Good rumor has it that two of these were never used (i.e. they were for things
like memory-to-memory DMA), and two DMAs controlling serial ports were combined
into one (I believe they have redesigned the entire serial interface). As
stated, the slab does not need OD DMA support, so it has one DMA fewer.

/ivo welch	ivo@next.agsm.ucla.edu