DEC PDP-11 CPU(left half). "The Control Chip (DC335) implements the microword access and sequencing functions of the J-11 chip set." (http://www.cpu-collection.de/?l0=co&l1=DEC&l2=PDP-11)
Map: http://siliconpr0n.org/map/dec/57-19400-04/left/top_metal_mit20x/
Wiki: http://siliconpr0n.org/archive/doku.php?id=mcmaster:dec:57-19400-04
