Explain the following in the context of 8086 Microprocessor with the h

Question

Explain the following in the context of 8086 Microprocessor with the help of an example or a
diagram:
(i) Use of code segment and stack segment registers for computing the respective 20-bit
addresses.
(ii) Any 4 flags of the flag register of 8086 micro-processor
(iii) Any four shift instructions of 8086 micro-processor

07 Aug 2023

Answer :

Word Count : 646

Sure, let's dive into each of these topics in the context of the 8086 microprocessor:

## (i) Use of Code Segment and Stack Segment Registers

The 8086 microprocessor uses segment registers along with an offset to compute 20-bit physical addresses in real mode. Two of these segment registers are the Code Segment (CS) and Stack Segment (SS) registers. The CS register points to the segment containing the program code, while the SS register points to the segment containing the stack.

In the 8086 memory model, each segment is 64 KB in size. To compute the physical address of a memory location, you use the following formula:

Physical Address = (Segment * 16) + Offset

Let's illustrate this with an example:

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