From arcadeshopper: I have a new supplier that is giving me a better price on these so I have marked them down to the current price!

From the designer:

I felt we needed a simple 32k expansion that slaps onto the side of the 4a, or side of the speech synthesizer... So I've been trying to build one.

There are a number of new cartridges that require the 32k memory expansion to function. And with the Flash ROM 99 EA5 conversion craze, a console with 32k on the side can suddenly play a much larger library of classic and new TI software titles.

My intent was to build and offer finished product. I envisioned a vertical board about 3" high by 4" deep, chips to the right, edge connector to the left. And a jumper for external or internal power.

Since the ti speech synthesizer blocks the 5v line from it's outgoing connector you will either need to extend the pin 1 line across the speech pcb or provide external power.

-M@