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A concrete example of special-purpose microprocessor development demonstrates how this simulation and analysis package facilitates the early stages of design. Simulation data enable the designer to improve performance quickly and easily with less probability of error. MARIO ZAGAR DANKO BASCHUniversity of Zagreb . JULY-SEPTEMBER 1997 105 LAS performs behavioral simulation at the chip and register-transfer levels. That means that the ATLAS user can describe a microprocessor's behavior in terms of its instruction set, execution times, and instruction functionality. As a result, ATLAS is suitable primarily for the first stages of the design process: global selection of the architecture, instruction set, and problem-solving algorithms.The ATLAS package consists of several tools. The most important is Compas (Configurable Microprocessor Architecture Simulator). Another important tool is the metaassembler Conas (Configurable Assembler). A third tool, Pean (Performance Analyzer), graphically displays and analyzes results obtained from the Compas simulator.Here, we present an example of special-purpose microprocessor design using the ATLAS tools. Our approach to obtaining performance improvements is not to use better technology and a faster clock. Instead, we focus on architectural modification and firmware improvement.

ABSTRACT

A novel derivative-free algorithm for solving quasilinear systems is presented. It resembles "classical" optimization approach but greatly simplifies computation, resulting in fast execution and numerical stability. Though the global convergence cannot be guaranteed, it turns out that the presented algorithm finds a solution as successfully as other commonly accepted methods. The algorithm is clearly developed and mathematically founded, and its properties are examined by comparisons with other methods.