The art of computer programming, volume 2 (3rd ed.): seminumerical algorithms
The art of computer programming, volume 2 (3rd ed.): seminumerical algorithms
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XDS has developed the General Purpose Discrete Simulator (GPDS) System which runs on its Sigma computing systems in either a time-shared or batch environment. GPDS is an extension of GPSS. Enhancements include a matrix library feature and the capability of automatically segmenting a model into overlay sections and storing these sections on a direct-access device. Other improvements to GPSS include the ability to use indirect addressing with any entity instead of just parameters, two new blocks that can locate other transactions and access data from them, and the ability to terminate a simulation when a steady-state condition is reached. This paper briefly discusses the design philosophy behind GPDS and then examines the enhancements incorporated in the language. The discussion includes some examples that illustrate the use of these new features and suggests some new modeling techniques which are now available to the user.