DESCRIPTIVE TECHNIQUES FOR DIGITAL SYSTEM CONTAINING COMPLEX HARDWARE COMPONENTS

DTMS (Descriptive Technique for Modules and Systems) is a Hardware Description Language that has been developed for the description of modern digital modules, and systems consisting of interconnected modules. Descriptions at different levels of abstraction are possible. Descriptions can be organized into a procedural framework to represent behavior or they can be organized into a nonprocedural framework to represent hardware parallelism. Descriptions organized in a procedural framework include one or more concurrently executing processes. Type declarations and instantiation makes it possible to reduce the size of system descriptions. With constructs for detailed timing specification, the language can be used for the description of systems with synchronous, asynchronous or mixed timing modes.;HS Net (Hardware Specification Net) is similar to HD Net and has been developed for graphical representation of conceptual designs. The model is suitable for the specification of concurrent systems where interlocks can be defined either abstractly or explicitly. A procedure has been developed for the realization of control hardware for synchronous systems from HS Net specifications. The control hardware can be used in conjunction with timing signals for data operations.;HD Net (Hardware Description Net) is a model that can be used for alternative graphical representation of the processes in DTMS module descriptions. Control and data operations are shown in the same graphs. Control operations are represented through the nodes and the data operation are shown in text.