Re: different versions of Mockingboards

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

macdog wrote:
> I have two Mockingboards.  The oldest one has a 1982 copyright on it
> and on the back side of it it has the letters MB1.  It also has a chip
> on it that i think is a speech chip.  That chip has the letters SC-01-A
> on it.

You are correct.  The SC-01 was the first speech chip used on the
Mockingboard, and was later replaced by the SC-02 (SSI-263).

The SC-01 actually has fewer articulation bugs, in my experience.
The SC-02 was never fully debugged, and generates "pops" when some
phonemes are combined.

> The newer of the two Mockingboards has a copyright date of 1985.  It
> has a model number of SSP2000, Rev D. It has a part number of D20137 B.
>
> They both work fine.  Is there any real difference between the two?  Is
> one better than the other?  Does one have more features than the other?
>  Thanks to anyone who can give me some info on these.

They are functionally identical, with the exception of the speech
chip differences.

The later board could accomodate two SC-02 chips, though very few were
actually configured that way.

-michael

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