In article ,
Al Arduengo wrote:

Does anyone have the specs for the communication protocol used on the
909? I am itching to play with the inputs on the bottom. I suspect
these are used to set the presets from the factory but there could be
some use for them otherwise. Are "Data In A/B" I2C? Is it some sort
of proprietary protocol?

I2C is pronounced "I", "squared", "C" and is a standard serial
communications port. Two lines clock and data. Fairly low speed up to a
few 10's of MHz. Try a google search.

--
Telamon
Ventura, California