SlideShare a Scribd company logo

Memory segmentations

•Download as PPTX, PDF•
•
maamir farooq
maamir farooq

Memory segmentation divides memory into separate segments of 64KB each to allow access to more than 64KB of memory using 16-bit registers. The 8086 processor uses memory segmentation across 16 segments totaling 1MB of memory. Segment registers store the starting address of each type of segment, including code, stack, data, and extra segments. Each segment is used for a specific purpose like storing instructions, return addresses, or user data.

1 of 11
Presented By: Majid Mehmood 2014-UETR-CS-15
 What is memory segmentation  Different memory segments  Segment Registers
“Memory segmentation is division of entire memory into different memory parts or segmentations.”
Memory segmentations
 Size of each segment is 64KB As in 8086 are registers are of 16-Bits , which can access only 64-KB  There are total 16 memory segments 8086 processor have 1-MB memory 16 * 64 = 1024 KB = 1 MB
 There can be any number of any segment depending upon user program  A segment may be located anywhere in memory  Each of the segment is used for a specific task or function
 Code Segment: is used for storing program instructions  Stack Segment: is used to store the return addresses e.g. Function call or interrupt  Data & Extra Segments: are used for storing data entered by user
 In 8086 4 segment registers are present named as 1- Code segment register 2- Data segment register 3- Stack segment register 4- Extra segment register
 All registers are 16-Bit registers  All registers are used for storing the starting address of their corresponding memory segment.
Any Question … ?
Thank You Thank You

More Related Content

Memory segmentations

  • 1. Presented By: Majid Mehmood 2014-UETR-CS-15
  • 2.  What is memory segmentation  Different memory segments  Segment Registers
  • 3. “Memory segmentation is division of entire memory into different memory parts or segmentations.”
  • 5.  Size of each segment is 64KB As in 8086 are registers are of 16-Bits , which can access only 64-KB  There are total 16 memory segments 8086 processor have 1-MB memory 16 * 64 = 1024 KB = 1 MB
  • 6.  There can be any number of any segment depending upon user program  A segment may be located anywhere in memory  Each of the segment is used for a specific task or function
  • 7.  Code Segment: is used for storing program instructions  Stack Segment: is used to store the return addresses e.g. Function call or interrupt  Data & Extra Segments: are used for storing data entered by user
  • 8.  In 8086 4 segment registers are present named as 1- Code segment register 2- Data segment register 3- Stack segment register 4- Extra segment register
  • 9.  All registers are 16-Bit registers  All registers are used for storing the starting address of their corresponding memory segment.