[sdiy] presets on a modular

[Lewis Bupp]

On Keith Emerson's Moog, there was a very primative way of saving patches. I 
think there was 5 or 6 presets that he could call up at the push of a button 
or two. If anyone has a pic of his moog, they were located on the top row, 
all the way to the left, if my memory is correct. Anyhow... does anyone know 
how this was accomplished using 1960's/70's technology?

Lew