> 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 ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
