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Chilton Atlas Downstairs

Engineer in front of console with bays 12b and 12c behind. Lift is at far end of room

Engineer in front of console with bays 12b and 12c behind. Lift is at far end of room
Large View

The downstairs part of Atlas was situated behind the engineers' workshops and was normally only accessible to the engineers and senior operations staff. The diagram below shows the layout of the bays and which bays still exist.

Air Conditioning Plant Room G48 G47 G46 Workshop Post Room Lift Atlas Processor 12c 12b 12a 8 5b 5a 3 2 1 E D C B A 10 11 7 6 4 9 Smaller Units A: PTR B: Teleprinter C: Console D: CCTV E: Filing Cabinet Cabinets now at the National Museum of Scotland Main Logic Cabinets (cb = cooling bay at one end of cabinet) 1: Fixed Store 2: CPU (3 bays + cb) 3: Core Store co-ord, PARs (3 bays + cb) 4: Drums(4), electronics (3 bays) 5a: Core store, stacks 0-5 (3 bays + 2 cbs) 5b: Core Store, stacks 6-11 (3 bays + 2 cbs) 6: Peripheral and drum coordinators, 1K working store (3 bays + cb) 7: Mag tape Coordinator (3 bays + cb) 8: IBM tape controller 9: Plessey 4K word core store (added 1968) 10: Mag Tape Exchange (2 bays) 11: Hard Disk (added 1968) 12a,b,c: Switching, power supply, monitoring etc

Looking towards the console area from the lift. Bays 5a and 5b containing the core store are on the left

Looking towards the console area from the lift. Bays 5a and 5b containing the core store are on the left
Large View

This shows part of the downstairs area at Chilton. The operators console is shown to the left. The arithmetic unit and B-Registers are shown behind. Normally the doors would be closed on the cabinets.

Engineers at Work

Engineers at Work
Large View