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Windows XP. Microsoft Windows XP Professional x64 Edition is an edition of Windows XP for x86-64 personal computers. It was released by Microsoft on April 25, 2005, around the same time as with the x86-64 versions of Windows Server 2003. It is designed to use the expanded 64-bit memory address space provided by the x86-64 architecture.
Windows XP Professional x64 Edition uses a technology named Windows-on-Windows 64-bit (WOW64), which permits the execution of 32-bit x86 applications. It was first employed in Windows XP 64-Bit Edition (for the Itanium), but then reused for the "x64 Editions" of Windows XP and Windows Server 2003.
The first, Windows XP 64-Bit Edition, was intended for IA-64 systems; as IA-64 usage declined on workstations in favor of AMD's x86-64 architecture, the Itanium edition was discontinued in January 2005. [57] A new 64-bit edition supporting the x86-64 architecture, called Windows XP Professional x64 Edition, was released in April 2005. [58]
Comparison of Microsoft Windows versions. Microsoft Windows is the name of several families of computer software operating systems created by Microsoft. Microsoft first introduced an operating environment named Windows in November 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces (GUIs).
Windows 1.0, the first independent version of Microsoft Windows, released on November 20, 1985, achieved little popularity. The project was briefly codenamed "Interface Manager" before the windowing system was implemented—contrary to popular belief that it was the original name for Windows and Rowland Hanson, the head of marketing at Microsoft, convinced the company that the name Windows ...
WoW64. In computing on Microsoft platforms, WoW64 (W indows 32-bit o n W indows 64 -bit) is a subsystem of the Windows operating system capable of running 32-bit applications on 64-bit Windows. [1] It is included in all 64-bit versions of Windows, except in Windows Server Server Core where it is an optional component, and Windows Nano Server ...
A 64-bit word can be expressed as a sequence of 16 hexadecimal digits. In computer architecture, 64-bit integers, memory addresses, or other data units [a] are those that are 64 bits wide. Also, 64-bit central processing units (CPU) and arithmetic logic units (ALU) are those that are based on processor registers, address buses, or data buses of ...
The five-volume set of the x86-64 Architecture Programmer's Manual, as published and distributed by AMD in 2002. x86-64 (also known as x64, x86_64, AMD64, and Intel 64) [note 1] is a 64-bit version of the x86 instruction set, first announced in 1999. It introduced two new modes of operation, 64-bit mode and compatibility mode, along with a new ...