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Date: Tue, 15 May 2007 11:51:44 -0400
Message-Id: <200705151551.l4FFpix3017557@envy.delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: djgpp AT delorie DOT com
In-reply-to: <1179233938.968657.125170@q75g2000hsh.googlegroups.com>
	(pyzals AT gmail DOT com)
Subject: Re: DMA and Soundblaster with DJGPP
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   <4649645d$0$20296$9b4e6d93 AT newsspool3 DOT arcor-online DOT net> <1179233938 DOT 968657 DOT 125170 AT q75g2000hsh DOT googlegroups DOT com>
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> What DJ said makes perfect sense to me now, (Thanks DJ). What I still
> don't understand is that there seems to be code out there that is
> supposed to work with DJGPP, but doesn't take this into account.

I didn't look at the examples, but some programs may take advantage of
"near pointer" mode, where memory is linear mapped and locked down, so
you can do DMA on local memory with a little pointer math.  Note that
you have to provide an alternative if near pointers can't be enabled;
those sample programs may not be doing that.