Peter,  There is a member of the Microwave list that retired from ADEMCO I
will see if I can find out from him.

Derward


----- Original Message ----- 
From: "Peter Todd" <pete@petertodd.ca>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Saturday, February 04, 2006 10:20 AM
Subject: [EE] MPROM


 <snip>
> Actually the IC's on the board are a bit of a puzzle, none of the part
> numbers are familiar, ADEMCO 525 anyone? Pretty sure it's digital logic,
> there just aren't enough components other than the IC's for it to really
> be anything else. The date codes suggest it's all from 1972-74

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