Archive for April, 2013

Segementing how a microprocessor manages more than 64K of memory

April 25, 2013

Segmenting is a memory management technique which microprocessors use to address more than 64kilobytes memory.In this example I will demonstrate how
Intel 8086 accomplishes addressing more than 65K memory.

A memory word is addressed by addressing by  adding a segment pointer and a word address as shown
in the picture.

The possibility of addressing one megabyte doesn’t necessary mean that the processor has a physical memory of 1MB.
You can make a program as if the processor had 1MB of memory and the
processor can fetch the segment that is being addressed from the computers hard drive.

moreThan64KAdressing

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Writen by: Rikard Grossman-Nielsen
Technorati token: F6U8ZD2JJGDG

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