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Path: utzoo!watmath!clyde!rutgers!lll-lcc!unisoft!paul
From: paul@unisoft.UUCP
Newsgroups: comp.arch
Subject: Re: Using a DMA chip in strange ways
Message-ID: <282@unisoft.UUCP>
Date: Fri, 20-Feb-87 16:16:52 EST
Article-I.D.: unisoft.282
Posted: Fri Feb 20 16:16:52 1987
Date-Received: Sat, 21-Feb-87 07:44:09 EST
References: <4343@columbia.UUCP> <630@vu-vlsi.UUCP>
Reply-To: paul@unisoft.UUCP (Paul Campbell)
Organization: UniSoft Systems; Berkeley, CA
Lines: 27

In article <630@vu-vlsi.UUCP> elh@vu-vlsi.UUCP (Edward L. Hepler) writes:
>DMA controllers.  In particular, while I was working on the architecture/
>partitioning of some of the peripheral chips for the ATT WE32XXX family,

....

>This part also has a number of other interesting features including
>a *separate* byte wide bus which services commercially available
>byte wide peripherals (disk, lan, etc. controllers), byte to word
>packing, word buffering and burst mode bus transactions....  The 
>peripherals on the byte wide bus lie in the address space of the
>DMA peripheral which lies somewhere in the address space of the system
>(obviously...).
>
>Dr. Ed Hepler,  Adjunct Prof. Villanova University
>                Staff Engineer, GE Astro Space, Valley Forge
>                (Formally MTS, Bell Labs, Naperville, Ill.)

	Everyone doing serious peripheral design should look at this chip
(WE32106 I think). It must the the best DMA chip on the market ... only one
catch - the price $250 a piece in 100 quantities. Still, if you want to see
how to design a DMA chip right (esp. if you are going to design one), look
at this one.


		Paul Campbell
		..!ucbvax!unisoft!paul