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