Extended Storage Feature Modifications to the 9020A System.

In order to meet the future demands of the Air Traffic Control Upgraded Third Generation System, hardware/software architectural design changes were developed to provide additional core storage and processing capability. These changes, known as the Extended Storage Feature, were implemented in the 9020A System. This report discusses the hardware/software modifications, acceptance tests, and cost considerations involved in implementing this feature. Implementation of the Extended Storage Feature will increase the storage capacity of a 9020A System by 64K words per storage element converted without requiring additional floor space and can be installed without impacting operational activity.