Editing Memory address (section)

===Memory models in x86 architecture===
{{main|x86 memory models}}
Early x86 processors use the [[memory segmentation|segmented memory model]] addresses based on a combination of two numbers: a [[x86 memory segmentation|memory segment]], and an [[offset (computer science)|offset]] within that segment.

Some segments are implicitly treated as ''code segments'', dedicated for [[instruction (computer science)|instruction]]s, ''[[call stack|stack]] segments'', or normal ''[[data (computing)|data]] segments''. Although the usages are different, the segments do not have different [[memory protection]]s reflecting this.
In the [[flat memory model]] all segments (segment registers) are generally set to zero, and only offsets are variable.
{{see also|Long mode}}