You talk about old apps that make hardware calls.  Also would be
interesting a standar sound library for new DOS apps.


2009/5/18, Christian Masloch <c...@bttr-software.de>:
>> Linux has supported ac97 soundcards for years, why can't dos have
>> a .sys driver that can be loaded at boot time to do the same thing?
>> there's a *lot* of motherboards that have ac97 support these days,
>> well over 50%, and having a .sys driver to handle these kinds of
>> boards would add a great deal of usability to dos apps, especially
>> ones that already work directly with sb compatible cards.
>
> The problem is that apps working with SB cards usually do this by
> accessing hardware ports directly (in/out instructions). You can't "hook"
> ports as easily as interrupts, so a driver which would provide other sound
> cards to work as SB would require protected mode. It has been suggested to
> write the driver as Jemm Loadable Module (JLM) to do this. This could only
> be loaded by the Jemm386 memory manager.
>
> Regards,
> Christian
>
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