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The SDS Sigma series is a series of third generation computers [1] [2] [3] that were introduced by Scientific Data Systems of the United States in 1966. [4] The first machines in the series are the 16-bit Sigma 2 and the 32-bit Sigma 7; the Sigma 7 was the first 32-bit computer released by 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 ...
SDS 930 at Swissair, 1966. The SDS 9 Series computers are a backward compatible line of transistorized computers produced by Scientific Data Systems in the 1960s and 1970s. This line includes the SDS 910, SDS 920, SDS 925, SDS 930, SDS 940, and the SDS 945.
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.
The Universal Time-Sharing System (UTS) is a discontinued operating system for the XDS Sigma series of computers, succeeding Batch Processing Monitor (BPM)/Batch Time-Sharing Monitor (BTM). UTS was announced in 1966, but because of delays did not actually ship until 1971.
There were 3 models built, the Sigma 9, the Sigma 9 Model 2 and the Sigma 9 Model 3. The original was the most powerful and was universally applicable to all data processing applications at the time. The Model 2 was able to process in multi-programmed batch, remote batch, conversational time-sharing, real-time, and transaction processing modes.
The Mitra 15 is the successor to the CII 10010, [1] also called Iris 10, a 16-bit minicomputer released in July 1967. [2] At the time, CII also produced another 16-bit minicomputer, the CII 10020 (actually a licensed Sigma 3 from SDS) and wanted to replace them both with a new, more powerful design compatible with the latest offering of the company.