IBM 4020 Military Computer

The IBM 4020 Military Computer[1] were Cold War computers used in the two IBM AN/FSQ-31 SAC Data Processing Systems.

Details:[1]

The instruction format includes:[1]

Man-machine communications included a light-gun to indicate an area of interest on a visual display unit.[1]

Circuit logic packaging was based on 7 types of Q-pacs each holding 1 to 4 circuits. Transistors and semiconductor diodes were soldered to the outside of the Q-pac encapsulation for ease of cooling and replacement.[1]

References

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