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To: "Christoph P. Kukulies" <kuku@gilberto.physik.rwth-aachen.de>
cc: freebsd-hackers@freefall.freebsd.org
Subject: Re: dma beyond isa with a AH1542? 
In-reply-to: Your message of "Wed, 06 Dec 1995 15:09:32 +0100."
             <199512061409.PAA22744@gilberto.physik.rwth-aachen.de> 
Date: Wed, 06 Dec 1995 14:35:01 -0800
Message-ID: <20827.818289301@time.cdrom.com>
From: "Jordan K. Hubbard" <jkh@time.cdrom.com>
Sender: owner-hackers@FreeBSD.ORG
Precedence: bulk

Uh, Christoph, you should read the handbook sections about this.
*ANY* ISA card is DMA address space limited!  :-)

					Jordan

> 
> I built a new kernel for my non-IDE system running from a
> AH1542A. Is this board limited to 16MB? I have 20MB Ram,
> disabled option BOUNCE_BUFFERS since I thought this was not
> necessary when running a busmaster DMA controller
> but got a panic after the dma beyond ISA message during boot.
> 
> 
> --Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de