*BSD News Article 41484


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From: explorer@iastate.edu (Michael Graff)
Newsgroups: comp.os.386bsd.questions
Subject: Re: drivers for NCR53c810 and 3com 509...
Date: 23 Jan 95 02:28:28 GMT
Organization: Iowa State University, Ames, Iowa
Lines: 16
Message-ID: <explorer.790828108@wallaby.cc.iastate.edu>
References: <ccs.790159245@ctdnet> <3fb5g5$7dd@ici-paris.ensta.fr>
NNTP-Posting-Host: wallaby.cc.iastate.edu

In <3fb5g5$7dd@ici-paris.ensta.fr> bouyer@ensta.fr (Manuel Bouyer) writes:

>NetBSD doesn't implement bounce buffers, but the problem of more than 16
>meg of ram is only (i think) for isa scsi adapters. I have 32 meg of ram
>on my pentium, an i use a NE2000 and a 3c509 (both isa) whithout
> any problems.

I don't know if the 509 uses DMA, but even if it does, unless it
bypasses the on-board DMA controllers (i.e, bus-mastering) it doesn't
matter.  NetBSD supports bounce buffers for things which use the
system board DMA controllers.
-- 
Michael Graff                 <explorer@iastate.edu>   Speaking for myself, not
Project Vincent               Voice: (515)294-4994     for ISU or the ISUCC
Iowa State Univ Comp Center   Fax:   (515)294-1717
Ames, IA  50011               http://www.public.iastate.edu/~explorer