Re: Echo II sound cards

[mjmahon@aol.com (Michael J. Mahon)]

Bill Garber wrote:

>"Exegete" <millers@noneofyourbusiness.com> wrote in message
>news:406454e9$1_5@corp.newsgroups.com...
>: They use a 6522 to address two AY-3-8913 chips.
>: If memory serves, that chip has three "voices" and a "white
>noise"
>: generator.
>
>Really?, I thought that was the Mockingboard.
>I'm looking at an Echo IIb and it has none of
>those chips. Of course I don't have a straight
>Echo II so I can't really disagree.

The Echo II has only the TI "Spean'n'Spell" synthesis chip,
but can be used to play digitized sound and to make non-speech
sounds, within limits.

The Echo II+ has both the TI chip and two AY-3-8910's for
Mockingboard capability.  (I don't know whether it was actually
software compatible with the Mockingboard.)

-michael

Check out amazing quality sound for 8-bit Apples on my
Home page:  http://members.aol.com/MJMahon/