From owner-freebsd-multimedia  Sun Oct 18 16:12:30 1998
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From: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
Message-Id: <199810182110.WAA04131@labinfo.iet.unipi.it>
Subject: Re: ESS1868 in thinkpad 560e w/pcm
To: caj@lfn.org (Craig Johnston)
Date: Sun, 18 Oct 1998 22:10:25 +0100 (MET)
Cc: freebsd-multimedia@FreeBSD.ORG
In-Reply-To: <Pine.GSO.3.96.981018120035.11065A-100000@jane.lfn.org> from "Craig Johnston" at Oct 18, 98 12:09:51 pm
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> Ok, am I missing something in configuring this?  When I try to cat
...
> I was under the impression that this ESS was only half-duplex,
> or am I wrong and do I need to set 2 dma channels?

no, the ESS is full duplex but the "pcm" driver does not support it but
in SB3.1 mode.

> This chip is supposed to also emulate MSS, but I was under 
> the impression that MSS was full-duplex.  Am I mistaken?

i believe the ESS does _not_ emulate MSS at the register level.
It can do much the smae thing (i.e. 16-bit full duplex up to 48 KHz)
but needs a different driver.

	cheers
	luigi


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