As I mentioned last week, I acquired a joblot of AMI S10430 chips (untested), and the seller (not eBay, before you look it up) threw in a couple of these vintage organ chips.

They are SGS M259EB1A, if that means anything to you?

I don’t think they are of any use to me, so I’ve put them up for sale on eBay. There are a couple of other sellers, but they are in Italy, so not really competing with them.

The only info I could find was right here on this site, on the Vintage Chips pages! Here’s the link..

Granted it’s not much, but it does name the organs they were used in. No schematics or pinouts though. Here’s the link to that..

M259 EB 1A (SGS , ST Integrated Circuit M259EB1A)
Chip Name: M259 EB 1A (SGS , ST Integrated Circuit M259EB1A)
Description: M259 EB1A – 16 Rhythm Generator (DIP40)

Associated Instruments:
ELKA Elka 18
ELKA , ORLA RX-81
EMINENT F220 , F225
SOLINA F220 , F225
EMINENT P 240
EMINENT P 275
SOLINA P 275
HOHNER Symphonic 82
HOHNER Symphonie 76 , 78 , 80
HOHNER Caravelle 610 De Luxe
LOGAN Caravelle 610 De Luxe
ORLA Sonatina , Sonatina-L
VISCOUNT Broadway Music Maker
VISCOUNT Hollywood

Here’s the link..