EM64T: Difference between revisions

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* [[X86-64]]
* [[X86-64]]
* [[Creating a 64-bit kernel]]
* [[Creating a 64-bit kernel]]
=== Wikipedia ===
* [[Wikipedia:EM64T|EM64T]]
=== External Links ===
=== External Links ===
* [[Wikipedia:EM64T|EM64T]] on Wikipedia.
* [ftp://download.intel.com/design/Pentium4/manuals/25366816.pdf XEON manual]
* [ftp://download.intel.com/design/Pentium4/manuals/25366816.pdf XEON manual]



Revision as of 02:18, 5 April 2009

Intel Extended Memory 64 Technology (Intel EM64T) enables 64-bit computing on the server/workstation and desktop platforms when combined with supporting software. Intel EM64T improves performance by allowing the system to address more than 4 GB of both virtual and physical memory.

Technically speaking, EM64T offers to Intel processors what x86-64 offers to AMD processors. Ancient disagreements such as 3Dnow-vs-SSE still holds, but the rest should be exactly the same. It is supported by latest XEON processors.

Intel EM64T provides support for:

  • 64-bit flat virtual address space
  • 64-bit pointers
  • 64-bit wide general purpose registers (16 - added R8-R15)
  • 64-bit integer support
  • Up to 1 tebibyte (TiB) of platform address space

Currently physical addresses are restricted to 40 bits, and linear addresses are restricted to 48 bits, sign-extended.

See Also

Articles

External Links