From owner-freebsd-multimedia  Sun Jan 17 13:54:28 1999
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From: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
Message-Id: <199901171938.UAA04912@labinfo.iet.unipi.it>
Subject: Re: technical requirements to run 2 soundcards in one PC
To: andreas@klemm.gtn.com (Andreas Klemm)
Date: Sun, 17 Jan 1999 20:38:08 +0100 (MET)
Cc: freebsd-multimedia@FreeBSD.ORG
In-Reply-To: <19990117220625.A26582@titan.klemm.gtn.com> from "Andreas Klemm" at Jan 17, 99 10:06:06 pm
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> Hi !
> 
> This is a general, not necessaryly FreeBSD related question.
...
> ourselves, if we got perhaps out of DMA channels.
...
> Both cards run in full duplex mode ... So, do they need 2 or 4
> DMA channels ?
> 
> Well, just need some technical background, how it would be
> possible to drive 2 ISA soundcards in one PeeCee.

it all depends on how good is your driver etc. etc. -- yes, you might
run out of DMA channels in some cases.

Me, i have had 3 ISA cards working together, two using full duplex and
one half duplex (the latter using only one channel). This was with the
"pcm" driver on FreeBSD.

	cheers
	luigi
> 
> Thanks
> 
> 	Andreas ///
> 
> -- 
> Andreas Klemm                                http://www.FreeBSD.ORG/~andreas
>      What gives you 90% more speed, for example, in kernel compilation ?
>           http://www.FreeBSD.ORG/~fsmp/SMP/akgraph-a/graph1.html
>              "NT = Not Today" (Maggie Biggs)      ``powered by FreeBSD SMP''
> 
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