What is memory segmentation?

Memory Segmentation

Memory segmentation is the division of computer's primary memory into segments or sections. In a computer system using segmentation, a reference to a memory location includes a value that identifies a segment and an offset within that segment. Segments or sections are also used in object files of compiled programs when they are linked together into a program image and when the image is loaded into memory.

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Some articles on memory segmentation:

Intel Memory Model - Memory Segmentation
... are used to refer to four segments on the 16-bit x86 segmented memory architecture ... mode, in order to calculate the physical address of a byte of memory, one left-shifts the contents of the appropriate register 4 bits, and then adds the offset ... F139 = 84359 Note that this process leads to aliasing of memory, such that any given physical address may have multiple logical representations ...
Memory Segmentation - Object Files
... Conventions exist for segments shared between object files for instance, in DOS there are different memory models that specify the names of special segments and whether or not they may be combined ...

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