This video at 20:20 has an Amstrad PDS interface. Has anyone seen or got one?
https://youtu.be/5lKs5jlB5n8?si=CQR7xQTCt6ocMqla
You have the answer right here: https://www.cpcwiki.eu/index.php/PDS_development_system
Including the PDS picture you mentioned which is the one from yours truly... 8)
That's cool that they had them in the 80s
Bought this one a couple of years ago as a 'rainy day' project. Hoping to find an Amstrad DOS PC to connect to it sometime. Lurking under all the bits and pieces is an incomplete 6128plus.