Short
for Upper
Memory Area, UMA is the area of RAM between 640KB and 1,024KB (1MB) that
has been made into usable RAM. In DOS based systems, memory is split
into five areas: conventional memory; upper memory; high memory;
extended memory; and expanded memory. The UMA consists of upper memory
blocks, and users can access this area through a special memory
manager, such as EMM386.exe
See Memory diagram for
complete memory layout.
Also see: Memory definitions
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