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Re: DECstation I/O adresses

To: linux-mips
Subject: Re: DECstation I/O adresses
From: Michael Engel <>
Date: Tue, 25 Feb 1997 12:25:55 +0100 (MET)
In-reply-to: <> from "" at Feb 25, 97 12:12:32 pm
> > Nope, try it. We may not reuse code from NetBSD because of some silly
> > copyright restrictions (but we could always use code from OpenBSD or
> > 4.4BSD Lite, I think). If you find out information on the 5000/1xx and
> > Maxine (a list of I/O adresses etc.), that'd be great !
> Is tomorrow ok? ;-)
Yes, fine :-)

> A list of I/O adresses should not be that much of a problem, DMA 
> transfers are another story. Anyway, if you are interested, i'll 
> prepare a list from the NetBSD sources.
The DECstations don't use DMA, IIRC ... the SCSI and Ethernet controller
have their own little buffer RAM areas, the R3000 is responsible for all
memory transfers ...

        Michael Engel   (

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