the alpha syntauri system
  a ancient synthisizer concept for the Apple II		    Page No.:H212-2
 
          the Apple II interface card of the alpha syntauri  
      The interface of the alpha syntauri in the Apple II is rather simple due to the fact that it only passes over the information fron the internal decoder interface inside of the keyboard. Up to the moment it seems that one part of the information is a parallel set of the 8 Databits. And it seems that
at the other hand some part of the information might be some kind of handshaking and probably some kind of Interrupt-handling.
Unfortunatly this part of the information is not complete because the alpha syntauri system i have purchased from ebay did not
have this interface card. The only information availiable at the moment yet, is taken from only 2 pictures that i have at the moment.

At the beginning just a important remark:
During the time of distribution of the alpha syntauri system, the system has changed several times with several revisions. The informations
provided here cover the most common more later ( but not last ) revision of the system I try to research also informations on later and earlier
revisions at the moment.
The moment such information gets accessable, i will add such informations to the currently blank page 6 of this series of pages.


Anyhow - lets proceed with the information availiable - at least at the moment - to the point, that might be claimed to be sure.
 		  
  Here is the picture of the top of the interface:



and now the picture of the solderingside of that interface card:




The following picture displays the traces fron the soldering side which are safe identified:



and here the part of the component side of the interface card that is also detected for sure as red layer:


 
 and here is a picture of the current circuitplan with the information availiable up to this moment...:




 and here is the pinout of the cable from this Apple II interfacecard to the alpha syntauri keyboard:



there is also another kind of interface that was distributed along with the alpha syntauri system,
but the picture of that card is unfortunatly that bad,
that there is not the slightest chance to reverse engineer it by that picture
( even more because also a picture of the rearside / soldering side
of that card is missing/ not availiable ):




 

 

 


 
         
         
         
         
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