[OT] Para los entendidos en ADM64

"The real flexibility comes when the processor loads the
64-bit version of Windows; in that mode, called Long Mode,
the computer can run both 32-bit and 64-bit Windows
applications at full hardware speed. The backward
compatibility with 32-bit applications is provided by the
AMD64 processor on the hardware side; the operating system
handles 32-bit calls by using a special technology called
WoW64, for Windows-on-Windows 64, that translates 32-bit
pointers and arguments into 64 bits and back again."

http://www.devx.com/amd/Article/17783
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