Logical Vs Physical Address Space

The address generated by CPU is called logical (or virtual) address space. Processes are always uses virtual address space and they do not see physical address. Logical address space is set of logical addresses that generated by a program.

 

The physical address is address that seen by memory unit and used to access memory units. Virtual addresses are mapped with physical addresses by memory management unit.

 

                

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Memory management unit (MMU) is a hardware device that maps virtual addresses to physical addresses.

 

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