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ACLTechnologySC 4020
ACLTechnologySC 4020
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Further reading

Overview
History
Charactron Tube
Fonts
SC4020 Speed
Architecture
Tube
16mm Camera
Hardcopy
Vought Camera
Order Code
Printing
Drawing
Film Production
UAIDE 1970
UAIDE Contents 1964-1973
UAIDE Papers
1968: Honey
1968: Sarno
1968: Yarbrough
SC4020 Manuals
Engineers Training
Information Manual
Programmers' Reference Manual
Other
Diagrams drawn by computer

SC4020 Architecture

Atlas SC4020 with Gill Weedon (later Dancey)

Atlas SC4020 with Gill Weedon (later Dancey)
View in detail ⇗
© UKRI Science and Technology Facilities Council

The SC4020 was a valve-based system that generated output based on a set of commands that it received on an IBM 7-track magnetic tape. Probably the major use of the two IBM decks on Atlas was the generation of output tapes destined for the SC4020.

In this picture, the operator is mounting a magnetic tape for processing. In operation, the second bay would be closed. In the photograph, the charactron tube is rotated forward in its maintenance position. Normally it would be flush underneath the camera above.

SC4020 commands included:

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