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Flat memory model
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===Paged memory model=== {{Main|Paging}} *Suitable for multitasking, general operating system design, resource protection and allocation *Suitable for virtual memory implementation *More CPU real estate, somewhat lower speed *More complex to program *Rigid page boundaries, not always the most memory efficient *This memory model is required when using [[Physical Address Extension]] (PAE) in [[Pentium Pro]] and later x86 CPUs to support 36-bit physical addresses to address more than 4GB of physical memory.
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