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Re: DECstation I/O adresses

To: linux-mips
Subject: Re: DECstation I/O adresses
From: Ralf Baechle <ralf@Julia.DE>
Date: Wed, 26 Feb 1997 15:01:00 +0100 (MET)
In-reply-to: <199702260849.AA25355@internet-mail2.ford.com> from "hkoerfg1@ford.com" at Feb 26, 97 09:49:23 am
Hi,

> Michael, i'm afraid that is not fully correct. AFAIK all Turbochannel 
> DECstations except the 5000/200 have an IO-ASIC on board which 
> supports DMA-Channels for the SCSI, Ethernet and even the serial 
> ports. These machines have no RAM buffers. But remember, this is 
> second if not third hand information, so take it with a grain of 
> salt. 

In case of doubt take a look at the motherboard.  The extra RAM for the
DMA buffer should be easy to recognize.  This concept is also being used
in the Desktstation Tyne.

  Ralf

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