Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!ncar!oddjob!gargoyle!att!alberta!ubc-cs!fornax!bby-bc!john
From: john@bby-bc.UUCP (john)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Ethernet cards for an IBM PC
Summary: why not dma on ethernet cards for unix??
Message-ID: <291@bby-bc.UUCP>
Date: 12 Jul 88 06:39:54 GMT
References: <4424@sphinx.uchicago.edu> <239@belltec.UUCP>
Organization: Burnaby, British Columbia, Canada
Lines: 17

In article <239@belltec.UUCP>, jim@belltec.UUCP (Mr. Jim's Own Logon) writes:
> In article <4424@sphinx.uchicago.edu>, cjdb@sphinx.uchicago.edu (Charles Blair) writes:
> > 
.
.
>    Intelligent Ethernet boards can do all this and more. On incoming packets
> they can preprocess the information before alerting the host that it has
> information. It can have DMA logic with the AT bus so it can also transfer
> the packet to main system memory (but this is not a win for UNIX systems, stick
> with the dual port RAM). Outgoing packets can be assembled from various 

Why is dma not advisable for unix?

I would have thought the reverse - dma not being worthwhile for dos but
a real win for unix!?

john
  ...ubc-cs!fornax!bby-bc!john