Large version of the Acorn 32016 2nd Processor board, because of the number of memory chips (8*16).

This is the Acorn National Semiconductor 32016 2nd processor, the "Large" refers to the memory size which is 4 MB. The card almost certainly comes from an Acorn Cambridge Workstation, as it would not fit into the standard Acorn "cheese wedge" box.

The CPU is in the top right hand corner with an empty socket for a floating point co-processor next to it. The processor and other gold labelled chips are missing their heat sinks. The socket with the Ferranti ULA next to it is the Tube connector to connect to a BBC Micro. Most of the rest of the board is taken up with memory chips.