Btw, it`s no problem for me to read english. I feel that I understand 
everything. =) Just writing correct grammar is hard for me.

What is SNAP audio 
(http://www.unet.univie.ac.at/~a0503736/php/drdoswiki/?n=Main.SoundCardChip#toc5)?
 
I did look into it but I don`t get wise. It looks like it isn`t useful 
for endusers to turn *any* card into soundblaster compatible?

Eric Auer wrote:
>> I have onboard sound. In Windows I am using a driver called
>> C-Media AC97  Audio device.
> 
> Only a few new games and software like MPXPLAY media player for DOS
> can use AC97 directly, but as you see, it can be done :-).
> 
>> In DOS it`s called SiS 7012 Sound Codec. MidiPort 330, Compatibility
>> n/a, Roland MPU-401, everything else (dma, irq...) n/a.
>>
>> The old sb16 drivers, the one from via and one from SiS
>> with another  number (SiS 7018) are not working.
> 
> You might be able to trick the other driver into working
> for your chip, but you should do some research first. For
> example try to compare chip data sheets on the internet.
> No need to check the deep details, just get an impression.
> Only after that, check here or on bttr-software.de forum
> whether somebody can help you to play with the driver.

SiS 7012 (onboard) (there are no dos drivers): 
http://www.alsa-project.org/main/index.php/Matrix:Module-intel8x0

SiS 7018 (there are dos drivers): 
http://www.alsa-project.org/main/index.php/Matrix:Module-trident
http://en.wikipedia.org/wiki/SiS_630/730 says it`s SoundBlaster Pro/16 
Compliant
looks like pci, but unsure if exclusively used for pci

Don`t think this could work. Them seam to be very different. But I play 
to create a set of screenshots and then ask in that forum.

>> Therefore I guess I have no way to get this onboard soundchip
>> to work in DOS with also no way to get sb16 compatibility?
> 
> There is one generic solution: A driver which traps all
> attempts to access SB16 soundblaster hardware and forwards
> the collected sound data to a driver for AC97. This is
> how the drivers for SBLive and SBPCI work - those two PCI
> soundcards do not actually have SB16 hardware, they are
> AC97 and come with a "trap style" DOS driver. Problem is
> that only EMM386 compatible games work with it, as the
> "hardware trap" needs protected mode, as does EMM386...

Sounds nice, not perfect, but promising. :) In theory possible. :)

In theory also extensible firmware interface could be deliverance from 
any incompatibly problems - if someone writes the needed extensions.

> You should check the BTTR forum mentioned above: A while
> ago there was some talk about collecting donations for
> funding for writing a free open source "SB16 to AC97"
> driver, for example based on the virtual soundcard code
> of DOSEMU or Bochs combined with the AC97 driver of the
> MPXPLAY player or another OS, e.g. Alsa-project drivers.

Well, I searched the forums for ac97 but did not found anything about 
SB16 to AC97 founding.

Greetings
Michael Reichenbach

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