In the 8086 microprocessor, segment override prefixes are used to specify a segment other than the default segment for memory access. For instance, the CS, DS, SS, or ES prefixes can be used to direct the instruction to fetch data or code from a specific segment. This is particularly useful when accessing data stored in different segments, allowing for more flexible memory management. By placing the appropriate prefix before an instruction, you can override the default segment registers and control where the CPU looks for operands.
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