Date: Fri, 15 Aug 1997 11:06:03 +0200 (MET DST) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: hlew@www2.shoppersnet.com (Howard Lew) Cc: multimedia@FreeBSD.ORG Subject: Re: snd970814.tgz Message-ID: <199708150906.LAA07353@labinfo.iet.unipi.it> In-Reply-To: <Pine.BSF.3.91.970814163211.9555A-100000@www2.shoppersnet.com> from "Howard Lew" at Aug 14, 97 04:43:25 pm
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> Okay, I just had a chance to throw this in for a compile. I have to say
> it is looking much better. There is a hang though... dunno if it has to
> do with the dma stuff.
no, it has to do with me not having had a chance to look at the opti925
specs :) but I have them now, and your output is very helpful since I
can see now that your board only supports a soundblaster.
> Luigi, is there a way to choose between MSS or SB emulation on these Opti
> chipsets? I was looking at the Opti 925 spec sheet and there is even
> mention about SB 4.4 mode operation on the chip (Is that SB 16
> emulation?) and OPL4...
if you look at the code in opti931_attach, there is a if (0) { ...
block which enables sb emulation. I'll hadd specific support for the
925 i in the next snap. Right now I am fighting with the opti
chipsets, thoug, since the 931 behaves much differently from what the
data sheets say, and I hope the 931 is not as different.
> It would be nice if MSS (16 bit) was chosen as the default for these
> compatibles or have an option to set it because SB Pro is only 8 bit sound.
the 931 has a MSS codec inside; the 925, on the other hand, seems to
have only a SB codec, so you cannot have MSS but only SBpro/SB16.
However it is not true that the SB is 8bit; it is half duplex (or messy
full-duplex, with one 8-bit chan and the other using 16-bit(.
Cheers
Luigi
-----------------------------+--------------------------------------
Luigi Rizzo | Dip. di Ingegneria dell'Informazione
email: luigi@iet.unipi.it | Universita' di Pisa
tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy)
fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/
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