Runtime selection of code variants in a multiprogram computer hardware emulation system
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United States of America Patent
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Jan 26, 2010
Grant Date -
Jul 5, 2007
app pub date -
Dec 29, 2005
filing date -
Dec 29, 2005
priority date (Note) -
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Abstract
As fast and powerful commodity processors have been developed, it has become practical to emulate the proprietary hardware systems of powerful older computers on platforms built using commodity processors. The systems being emulated are often large mainframe computers with large numbers of disks, communications systems and other attached hardware. Because of the size and expense, and also because databases involved must reside in only one location, it is difficult to replicate these systems for testing, development, debug or for providing alternative options to customers. A method for providing a single emulated computer system which provides for multiple views or options in control of the emulator is disclosed in which the options are dependent and selected based on job or user basis. The mechanism continues to provide for high performance and a single copy of the operating system with multiple processes, jobs and threads being emulated under user controlled parameters.
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