|''PCB Top'' ||''PCB Bottom'' || Description
|-
|[[File:Gerald DDI-1 MF0004B.jpg|80px]] || [[File:Gerald DDI-1 MF0004B-Back with ABBA switch mod.jpg|80px]] || '''Board: MF0004B, ISS3, (C) Amstrad 1984'''<br>[[Amstrad Disk Drive|(more pictures)]]<br>20pin FDC Data Separator
|-
|}