Extended Memory Specification

Extended Memory Specification or XMS is the specification describing the use of IBM PC extended memory in real mode for storing data (but not executable code). Memory is made available by extended memory manager (XMM) software. The XMM functions are accessible through interrupt 2FH. XMS should not be confused with the somewhat similar Expanded Memory Specification.

This article is based on material taken from the Free On-line Dictionary of Computing prior to 1 November 2008 and incorporated under the "relicensing" terms of the GFDL, version 1.3 or later.

See also

• Conventional memory
• Upper Memory Area
• Extended memory
• Expanded Memory Specification
• High Memory Area

References

• Microsoft, Lotus, Intel, and AST Research (July 19, 1988). eXtended Memory Specification 2.0
• Microsoft, Lotus, Intel, and AST Research (January 1991). eXtended Memory Specification 3.0.