Board blank number etched near front on top of board
Scratched in front corner on top of board
Revision number Etched in front corner on top of board
Stamped in front corner on top of board
overall: 1/2 in x 8 in x 8 3/4 in
This is a 4 layer PCB with double sided edge connectors at the front and rear. The top is populated with DIP integrated circuits and a variety of discrete components including many metal can transistors. The left card extractor has "ID(16K)" stamped on it. This board is part of the memory controller for an HP2100 minicomputer.