PICdude wrote:

> Wow, I certainly remember that chip from waaaayyyy back.  Awesome
> device.  That also reminds me of the Votrax SC-01.
>
> I just found this... http://spatula-city.org/~im14u2c/sp0256-al2/
>
> Cheers,
> -Neil.
>
> Quoting John Gardner <goflo3@gmail.com>:
>
> > Was'nt the SPO256 originally a General Instruments chip?
> >
> > Getting to be a long time ago...

Part of General Instruments was bought by an investment group
that became Microchip.

I have some GI parts that were NMOS versions of 1654. I used
one in the design of a bathroom scales we did about 30 years ago

The Votrax core was potted in a some form of ceramic complete
with wires buried in the potting. It was remarkably good for its time.

w..



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