This device was built as part of a DIY (Do-It-Yourself) project created by Jochen Koob and Markus Rupprecht. It adapts ZIP Chip RAM sockets, such as those on the A3000 motherboard to use 2 x 72pin SIMMs. The schematics for this device can be found on Aminet and is called PS2_Adapter.lha

Thanks to Erkan Orhun and Christophe Magnani