IT. Expert System.

EMS) An IBM PC memory paging scheme enabling access to memory other than conventional memory in real mode.
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 memory manager (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.
EMS was developed jointly by Lotus, Intel, and Microsoft prior to 1988. Accordingly, this specification is sometimes referred to as LIM EMS.

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