SDS 940

The SDS 940 was Scientific Data Systems' (SDS) first machine designed to support time-sharing directly, and was based on the SDS 930's 24-bit CPU built primarily of integrated circuits. It was announced in February 1966 and shipped in April, becoming a major part of Tymshare's expansion during the 1960s. The influential Stanford Research Institute "oN-Line System" (NLS) was demonstrated on the system.

After SDS was acquired by Xerox in 1969 and became Xerox Data Systems, the SDS 940 was renamed as the XDS 940.

History

The design was originally created by the University of California, Berkeley as part of their Project Genie that ran between 1964 and 1965. Genie added memory management and controller logic to an existing SDS 930 computer to give it page-mapped virtual memory, which would be heavily copied by other designs. The 940 was simply a commercialized version of the Genie design, and remained backwardly compatible with their earlier models (with the exception of the 12-bit SDS 92).

XDS

XDS could refer to: