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From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com>
Message-Id: <199505012251.PAA13044@gndrsh.aac.dev.com>
Subject: Re: NCR 53C700
To: se@MI.Uni-Koeln.DE (Stefan Esser)
Date: Mon, 1 May 1995 15:51:52 -0700 (PDT)
Cc: paul@isl.cf.ac.uk, current@FreeBSD.org
In-Reply-To: <199505012135.AA18437@FileServ1.MI.Uni-Koeln.DE> from "Stefan Esser" at May 1, 95 11:35:54 pm
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> On the other hand, there is only one motherboard
> that comes with oboard 53c700 chips (sold by 
> Siemens/Nixdorf). I know of no add on cards with
> that chip, and of no other system that has it
> on the motherboard.

Acculogic ISA and VLB cards use 53C7XX's of some type, I can't
find my product data sheet right now :-(.

> } Anyone planning to get it working?
> 
> It wouldn't be to hard to modify the NCR 53c8xx 
> driver for the 7xx. This would require patches
> to the program loop executed by the NCR (all the
> "interrupt on the fly" commands must be replaced 
> by standard interrupt commands, for example).
> 
> I'm not sure about the DMA engine or need of an
> external DMA controller, but I can check the 
> details in a 53c7xx data book.
> 
> But I don't have the hardware, and I don't think
> many others have, so I currently don't intend to 
> put any effort in support for the 7xx. (What kind
> of machine do you have this controller in ?) 
> 
> Trying to write a driver without physical access to 
> a machine to run it on would be a silly idea, IMHO :)

The LINUX driver supports both 53C7XX and 53C8XX, maybe some
arrangements can be made to get you some hardware.

-- 
Rod Grimes                                      rgrimes@gndrsh.aac.dev.com
Accurate Automation Company                   Custom computers for FreeBSD