Differentiate between protected and real modes of an intel, Computer Engineering

Assignment Help:

Differentiate between protected and real modes of an Intel microprocessor

Operation of Real mode interrupt: When microprocessor completes executing the current instruction, it determines whether an interrupt is active by checking (1) instruction execution, (2) single -step (3) NMI (4) co-processor segment overrun (5) INTR and (6) INT instruction in the order presented. If one ormore of these interrupt conditions are present, following sequence of events takes place:

1.  The contents of flag register are pushed onto the stack

2.  Both the trap (TF) and interrupt (IF) flags are cleared. This disables INTR pin and trap or single-step feature.

3.  Contents of the code segment register (CS) are pushed onto the stack.

4.  Contents of the instruction pointer (IP) are pushed onto the stack.

5.  The interrupt vector contents are fetched and then placed into both CS and IP so that next instruction executes at the interrupt service procedure addressed by the vector.

 


Related Discussions:- Differentiate between protected and real modes of an intel

What is shift operation, Q. What is Shift operation? Shift: Shift ope...

Q. What is Shift operation? Shift: Shift operation is employed for transfer of bits either to left or to right. It can be used to comprehend simple arithmetic operation or da

What is electronic cash, What is electronic cash? E-cash is cash which ...

What is electronic cash? E-cash is cash which is shown by two models. One is the on-line form of e-cash which permits for the completion of all types of internet transactions.

What are addressing modes, What are Addressing Modes Many of instructio...

What are Addressing Modes Many of instructions that a computer actually executes during running of a program concern movement of data to and from memory. It is not possible sim

Processor technology , Processor Technology: Computers consist of elec...

Processor Technology: Computers consist of electronic components assembled in a design or "architecture" that will perform necessary functions of input, output, computation an

Hlt instruction is implemented in processor, What happens when HLT instruct...

What happens when HLT instruction is implemented in processor? Ans) The Micro Processor go into the Halt-State and the buses are tri-stated.

Intel architecture, INTEL ARCHITECTURE - 64 ( IA-64) IA-64 (Intel Archit...

INTEL ARCHITECTURE - 64 ( IA-64) IA-64 (Intel Architecture-64) is a 64-bit processor architecture developed in cooperation by Intel and Hewlett-Packard, executed by processors s

How to develop an object model, How to develop an object model To deve...

How to develop an object model To develop an object model firstly identify classes and their associations, as they affect overall problem structure and approach. Then prepare

Attributes of a field can be activated during runtime, What are the attribu...

What are the attributes of a field that can be activated or deactivated during runtime? Input, Output, Mandatory, Active, Highlighted, Invisible.

Grapgh, representation of the adjacency matrix and adjacency list

representation of the adjacency matrix and adjacency list

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd