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- Path: sparky!uunet!gatech!usenet.ins.cwru.edu!agate!doc.ic.ac.uk!uknet!cf-cm!myrddin.isl.cf.ac.uk!paul
- From: paul@isl.cf.ac.uk (Paul Richards)
- Newsgroups: comp.unix.pc-clone.32bit
- Subject: Re: Shared Memory or DMA ethercards for UNIX on a PC
- Keywords: Ethernet Adapters
- Message-ID: <1993Jan7.142902.2235@cm.cf.ac.uk>
- Date: 7 Jan 93 14:29:01 GMT
- References: <1993Jan6.201525.24636@nisc.psi.net> <C0GFw7.C7u@flatlin.ka.sub.org>
- Sender: news@cm.cf.ac.uk (Network News System)
- Organization: Intelligent Systems Lab, ELSYM, Universiity of Wales, College of
- Cardiff.
- Lines: 25
-
- In article <C0GFw7.C7u@flatlin.ka.sub.org> bad@flatlin.ka.sub.org (Christoph Badura) writes:
- >In <1993Jan6.201525.24636@nisc.psi.net> adams@nisc.psi.net (Mark Adams) writes:
- >>I have a chance to purchase an ethernet adapter which supports
- >>10BaseT and 10Base2 for about $100. Two models are available,
- >>one uses 32k shared memory, the other DMA.
- >>For a multitasking system, which would be a wiser choice?
- >
- >The best choice would be a card that is supported with a driver by your
- >UNIX. That said, I know of no ethernet card driver for UNIX that does
- >DMA (if someone knows better please correct me).
-
- Well actually, 386BSD has one for isolan cards. I'm pretty certain about
- this because I wrote it :-)
-
- I'm not a hardware expert but from what I've heard go for the shared
- memory. There are various problems with DMA on ISA buses in
- performance and it's 16Mb limit.
-
- However as I said I'm not a hardware expert and I'd be interested in
- some definite information.
- --
- Paul Richards, University of Wales, College Cardiff
-
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