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Abstract

Two major Forth extensions provide high-level support for building rapid prototypes for systems. These extensions form distinct language vocabularies available in the Forth environment. One is a Finite State Machine Language, named FSML, and the other is an object oriented language, named 200L. Using these extension and the inherent expandability of the Forth language, a prototype can be rapidly created. The modeling method requires four steps. First, using 200L, the system is described as a set of objects. At least one of the objects must be a controlling object and so identified. Second, using FSML, the controlling object is described as a finite state machine. Third, the system's operation is expressed as a collection of one or more finite state machines. Each finite state machine type is defined with a unique machine type name. Any number of instances of a finite state machine type can be dynamically created at execution time. Fourth, communication is allowed between the finite state machines.

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