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Computing (FOLDOC) dictionary
Expanded Memory Specification
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storage (EMS) An IBM PC memory paging scheme enabling
access to memory other than conventional memory in realmode.
Expanded memory is provided through a page frame of at
least 64 kilobytes in the reserved memory address region.
Access to this memory is provided by an expanded memorymanager (EMM) software. The EMM functions are accessible
through interrupt 67H.
In 8086 or 8088 based systems this is the only way to use
memory beyond conventional memory. In systems based on
80286 or later, XMS and HMA provide alternative methods.