Microcomputer
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United States of America Patent
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Nov 26, 2002
Issued Date -
N/A
app pub date -
Sep 13, 1999
filing date -
Mar 11, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
In a microcomputer intended for executing a multiplicity of user programs, a memory management unit ensures that none of the user programs can access other programs. However, in order to be able to use common library programs, and at the same time to prevent unchecked access to them, a vector memory area is provided which contains the start addresses of library programs as jump destinations. A library program is called by specifying the vector number, from which the memory management units determines he corresponding address in the vector memory area.
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