Re: Mockingboard D (IIc Version)

["Michael J. Mahon" <mjmahon@aol.com>]

Henry wrote:
> Hello all.
>
> Just a quick update.  The Mockingboard D (for the IIc) manual is now 
> available: 
> http://reactivecomputers.gotdns.com/Mockingboard%20D/Mockingboard%20D%20Manual.pdf
>
> I've also included some pictures of the unit studied: 
> http://reactivecomputers.gotdns.com/Mockingboard%20D/
>
> Thanks go to Christopher Ryan for this one.  Since the Mockingboard v1 is 
> just about sold out it's time to start redesigning it.  v2 coming up!  Since 
> the D version is relatively similar to the card version, one design will 
> probably lend parts of itself to the other.

This is very unlikely.  There is nothing "relatively similar" about
the two designs.

The Mockingboard D is a separate computer (controller) that drives
the AY-3-89xx sound-generating chip(s).  It even has its own power
supply.  There is practically nothing in common with bus-based
Mockingboards except the sound-generating chip.

-michael

New, faster SUDOKU v2.0 solver for Apple II's!
Home page:  http://members.aol.com/MJMahon/

"The wastebasket is our most important design
tool--and it's seriously underused."