SHUTTLE 71R-A14HV6-T810 A14HV02 REV. A Schematic Circuit Diagram
SHUTTLE 71R-A14HV6-T810 A14HV02 REV. A Schematic Circuit Diagram
IA-32e 64-Bit Extension Mode (x64, AMD64, x86-64, EM64T)
The IA-32 architecture, which was invented by AMD and later adopted by Intel, now has a 64-bit extension mode.
The Athlon 64, AMD's first 64-bit processor for x86-compatible desktop PCs, was released in 2003, followed by the Opteron, AMD's first 64-bit server CPU. In 2004, Intel released a line of Pentium 4 desktop processors with 64-bit support. In the years that followed, both companies released an increasing number of CPUs with 64-bit capability. Processors with 64-bit extension technology can run in three modes: genuine (8086), IA32, and IA-32e. In IA-32 mode, the CPU may run in both protected and virtual reality modes. IA-32e mode allows the CPU to function in both 64-bit and 32-bit modes, allowing you to execute both 64-bit and 32-bit applications at the same time. The IA-32e mode has two sub-modes:
- 64-bit mode-Allows a 64-bit operating system to execute 64-bit programs.
- Compatibility mode-Most existing 32-bit applications can be run on a 64-bit OS.
64-bit programs use the IA-32e 64-bit mode, which is enabled by loading a 64-bit OS. The following new features are available in the 64-bit sub-mode:
- Memory addressing in 64-bit lines
- Support for physical memory in excess of 4GB (limited by the specific processor)
- Eight new general-purpose registers have been added (GPRs)
- For streaming SIMD extensions, there are eight new registers (MMX, SSE, SSE2, and SSE3)
- GPRs and instruction addresses with a 64-bit width
