I also thought of trying to get sound working on the PowerBooks. And there have been requests for a driver every once in a while on this list.
The sound CODEC chip that is used in the NuBus PowerBooks (500, 2300, 1400, 5300) is an ITT ASCO and I got the documentation for it. The same CODEC is used in PDS the PowerMacs (x100) but the interface is different. While the PDS PowerMacs use DMA the PowerBooks use something like a hardware buffer - at least that's what the Apple hardware notes say. I suppose well working sound drivers can be quite difficult to write - especially if one never has done something like that before. A DMA emulation driver could be the thing we need - we could use the PDM driver then. But porting to kernel 2.6 needs to be done before writing a sound driver I think. Tobias Am 28.09.2006 um 17:06 schrieb Overclocked Mind: > *** PREFACE: I attempted to post this from my GMail > account, and it never made it to the list. If it is > instead a double posting, my apologies. *** > > To the list: > > Watching the developments over the driver on the list > lately have prompted me to wonder, would it be > possible for the group to work on a sound driver for > the PowerBook 1400? > > In that mega-conglomerated thread, someone mentioned > that sound is the only thing keeping them from using > Linux and Linux alone on their 1400; I too am in this > scenario. I listen to streaming radio on my PowerBook > to wind down for the day, and I would do it while I > work, too... except that the Mac OS isn't reliable > enough for that. > > I have the following machines that might be of > assistance: > PowerBook 1400 (of course, hehe) > Power Mac "Beige" G3... which would need set up again, > if it would be of assistance > > Unfortunately, I dont have any of the older > NuBus-equipped Power Macs to use, so we can't compare > that with my PowerBook directly, but I'll do snooping > in MacsBug, etc on the 1400. > > Of course a search for dev notes and the like on the > IC in question didnt lead me far enough to know what > we would be looking at, and as far as experience goes, > I am decidedly not a C programmer. Wasn't it mentioned > that perhaps the workings of the 1400's sound might > be, or might not be identical to that of other NuBus > Power Macs? > > If nothing else, is there further interest from the > group to persue such a thing? I'm definitely > interested. > > -- Joshua > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > > ----------------------------------------------------------------------- > -- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to > share your > opinions on IT & business topics through brief surveys -- and earn cash > http://www.techsay.com/default.php? > page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Nubus-pmac-users mailing list > Nubus-pmac-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/nubus-pmac-users > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Nubus-pmac-users mailing list Nubus-pmac-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nubus-pmac-users
