extended memory的意思|示意

Extended memory, also known as XMS (eXtended Memory Specification) is a type of memory used on IBM PC and compatible computers. It is an extension to the original IBM PC architecture and is used to address RAM beyond the first 640 kilobytes (KB).

Extended memory can be used to access extra RAM above 640 KB. This type of memory provides a way for a computer to access the standard 640 KB DOS memory area and still have access to additional memory that is available beyond the 640 KB limit. This type of memory is usually used for applications that need more than the 640 KB of memory allocated for use by the operating system. Extended memory is usually accessed through an application programming interface (API).

In modern PC operating systems, extended memory is usually managed by the operating system’s memory manager. This memory manager can be used to allocate memory to applications, as well as to manage virtual memory. The memory manager can also be used to set aside a certain amount of extended memory to be reserved for use by the operating system. This is done to ensure that the operating system has access to memory that is not used by applications.

In addition, extended memory can be used to run special applications that require a large amount of RAM. These applications can take advantage of the extra memory provided by extended memory to improve their performance. The extended memory can also be used to free up conventional memory for use by other applications.

Thus, extended memory is an important tool used by PC users to get the most out of their computers. It can be used to access more memory than the 640 KB limit, run memory hungry applications and free up conventional memory for other applications.