Using the cyber 205

Abstract The CYBER 205 is a new computer systems produced by Control Data Corporation at Arden Hills, Minnesota. The CYBER 205 is a large scale vector processor with substantial capabilities in scaler processing, one-to-four million words of main memory and concurrent I/O facilities. The CYBER 205 is available to potential users now in the last half of 1981. These facilities are found in Control Data CYBERNET Centers as well as in several installations throughout the world. The technology employed in the construction of the CYBER 205 emphasizes the latest advances in large scale integration of both logic and memory. The CYBER 205 system concept exploits the CDC Loosely Coupled Network (LCN). Standard FORTRAN is supplemented by various extensions imbedded with the provided FORTRAN compiler. Arithmetic properties of the computer are designed to support the functional requirements of FORTRAN in 32-bit and 128-bit formats. A multiprogramming operating system based on the CYBER 205 virtual memory isalso provided by Control Data Corporation. A variety of programs have now been run on the CYBER 205. The results of some of these runs are shown in tabular form for parametric study purposes. Analysis of these tables is converted to (tentative) timing formulas applicable to the specific algorithms described. The net effect of the algorithm development, the language support, the CYBER 200 libraries, the input/output support system and the CYBER 200 operational system is to extend the utility of supercomputers in a user environment. This system is now operational (in 1981).