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The BiProcessor consists of an IBM System/370™ and a Personal System/2® and merges these two IBM architectures into a synergistic relationship. The two processing environments are connected by an internal high-speed pipe that allows each system to take advantage of the other's strengths as well as developed products, both hardware and software. This paper describes this closely coupled heterogeneous multiprocessor and its capability of concurrent coprocessing. Also discussed are the implementation, coupling architecture, and design considerations of the BiProcessor and its development objectives. Some of the intended applications are host off-loading of communications protocol processing, use as an applications coprocessor, and service as a platform for future clustering technology.
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