Paul Evans <paule@shadowfax.martex.gen.oh.us> writes:
 
> ps - does anyone know the wiring for a ISDN Maxine port to "do" sound? 
> (what exactly is it anyway?)

I have pin assignment diagram.  If you want to know I'll send it.

Maxine has two MMJ ports; 4pin small one for headset, 8 pin large for
ISDN.  The hardware is the same some desktop SparcStation, and NetBSD
seems to have support SS audio hardware.  So, the project would be to
build IOASIC DMA attachment combinding MI am7990 code.  The similar
(same?) circuit exists in TurboChannel Alpha machine (DEC3000). 

Jonathan Stone follows:

> AFAIK it's an am7930; Same audio chip hardware as in old Sun4c boxes.
> 
> The ioasic has funky DMA support that has to be handled and integrated
> into an front-end ioasic.  Handling the DMA pointer-reload interrupts
> from the ioasic DMA means redoing the interrupt structure.  When that
> is done, it should be much simpler to add front-ends for the MI scsi
> *and* for the Maxine audio/ISDN *and* the Maxine floppy-disk
> controller.

Sure it is (beside ISDN).  NetBSD/sparc compatible audio support would
be fun, too .

Tohru Nishimura
Nara Institue of Science and Technology