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¡§1-21 64-Bit Extension Technology Software Developer¡¦s Guide, Volume 1 of ...
1.6.5.2. PAGING DATA STRUCTURES
The 64-bit extensions architecture expands physical address extension (PAE) paging structures to potentially support mapping a 64-bit linear address into a 52-bit physical address. In the first implementation of the 64-bit extension technology, PAE paging structures are extended to support translation of a 48-bit linear address into a 40-bit physical address.¡¨
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