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An XDS Sigma 9 at the Living Computer Museum, Seattle, Washington, US, 2014. The Sigma 9 may hold the record for the longest lifetime of a machine selling near the original retail price [citation needed]. Sigma 9 computers were still in service in 1993. In 2011, the Living Computer Museum in Seattle, Washington acquired a Sigma 9 from a service ...
Front of the Xerox Sigma 9. On display at the Living Computer Museum in Seattle, Washington. The Xerox Sigma 9, also known as the XDS Sigma 9, is a high-speed, general purpose computer. Xerox first became interested in office automation through computers in 1969 and purchased Scientific Data Systems or SDS.
The Xerox Sigma 9 was a major re-design with instruction lookahead and other advanced features, while the Sigma 8 and Sigma 9 mod 3 were low-end machines offered as a migration path for the Sigma 5. The French company CII , as a licensee of SDS, sold about 60 Sigma 7 machines in Europe, and developed an upgrade with virtual memory and dual ...
The Xerox 530 system is a 16-bit computer aimed at upgrading the 16-bit Sigma 2 and 3 systems. The 530 was the first system of the line introduced in early 1973. [4] [5]The 530 supports memory sizes of 8 K to 64 K 16-bit words (16 KB to 128 KB) with a cycle time of 800 ns. [6]
SDS BASIC, also known as CP-V BASIC, Batch BASIC or Sigma BASIC depending on the version, is a BASIC programming language compiler for Scientific Data Systems's (SDS) Sigma series mainframe computers, originally released in 1967.
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 .