Set of Atlas schematic and logic diagrams.

Green folder contains about 240 Atlas engineers’ diagrams, each approximately 40 cms by 20 cms. They have various dates (eg: 17/7/62, 17/8/62, 4/12/62, 22/5/63, etc.). The notation used for the title of each diagram is that ‘OD’ generally signifies ‘overall schematic’ and ‘ED’ generally signifies ‘logic diagram’. By examining diagrams of type ED one can deduce signal names, signal polarities, monitor points on packages, package types and physical package positions. The physical positions are specified in terms of bay/box/slot. Some indication of the level of detail may be gained from the numbers of diagrams covering each topic, for example: Distributor (17 drawings), Central control (18 drawings), Accumulator (19 drawings), core store co-ordinator (20 drawings), etc.

Currently unavailable for public consultation