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physical address

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A physical address is a binarynumber in the form of logical high and low states on an address busthat corresponds to a particular cell of primary storage(also called main memory), or to a particular register in a memory-mapped I/O(input/output) device.

 

In a computer with virtual memorythat incorporates memory management, the physical address differs from the virtual address so a memory management unit (MMU) translates the virtual address into a physical address, enabling each running process to "think" that it has all the primary storage to itself.

 

This was last updated in September 2012
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