[sdiy] Identification of an unknown MIDI CV interface

grant musictechnologiesgroup.com grant at musictechnologiesgroup.com
Tue Sep 27 00:50:46 CEST 2022

Was there any such thing as open source in the 80's?

That's probably a Ferranti DAC chip. I think I have a few if anyone 
wants to get reacquainted.

Definitely looking forward to the EPROM dump, but this would be pretty 
easy to recreate in a jiffy.


------ Original Message ------
From: "brianw" <brianw at audiobanshee.com>
To: "synth-diy at synth-diy.org" <synth-diy at synth-diy.org>
Sent: 9/26/2022 3:29:26 PM
Subject: Re: [sdiy] Identification of an unknown MIDI CV interface

>My first impression is that the perf-board says this was a one-off (not to mention the flying wires).
>However, the sticker on the EPROM hints that it might have been from an open source project, although it could just be that the homebrew designer had a label printer and it was 100% DIY.
>Disassembling the EPROM could prove quite useful, assuming that P80C32 has a known instruction set. What is this Ferranti that you mention, Mike? Google says power grid, defense.
>On Sep 26, 2022, at 1:36 PM, Mike Bryant <mbryant at futurehorizons.com> wrote:
>>  I haven’t seen a Ferranti chip since the early 80s
>>  From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Florian Anwander
>>  Sent: 26 September 2022 21:21
>>  To: synth-diy at synth-diy.org
>>  Subject: [sdiy] Identification of an unknown MIDI CV interface
>>  Hello
>>  Does anyone of you know this MIDI-CV interface? It is built into a Prodigy. You can see a logo "B E" and a board name "HPG110". Must be quite old, because I doubt someone has developed anything seriously on an Intel P80C32 from 1996 within the recent 20 years...
>>  Regards
>>  Florian
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