Describe real and protected mode, Computer Engineering

Assignment Help:

Describe Real and protected mode:

Operation of Real mode interrupt:  When microprocessor completes executing the current instruction, it concludes 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 or more of these interrupt conditions are present, following sequence of events takes place:

1.  Contents of the flag register are pushed onto the stack

2.  Both the interrupt (IF) and trap (TF) 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 the subsequent instruction executes at the interrupt service procedure addressed by the vector.

 


Related Discussions:- Describe real and protected mode

Assignment help on Operating System and JQuery, I need help on my assignmen...

I need help on my assignments that i need to submit in 10 days. There are total 3-4 assignments on two different subjects: 1) 2-3 assignments in Operating Systems and 2) 1-2 assign

Full resolution rule - artificial intelligence, Full Resolution Rule - Arti...

Full Resolution Rule - Artificial intelligence: Now that we know about unification, we can correctly describe the complete edition of resolution: p1  ∨ ...  ∨ pj  ∨ ...  ∨ p

Explain folded network, Explain Folded network. Folded network: While...

Explain Folded network. Folded network: While all the inlets/outlets are connected to the subscriber lines, the logical connection shows as demonstrated in figure. When, the

What are the restrictions on subscreens, What are the restrictions on Subsc...

What are the restrictions on Subscreens? Subscreens have various restrictions.  They cannot: Set their own GUI status Have a named OK code Call another screen

Design a alarm system - microprocessor system, A burglar alarm system is co...

A burglar alarm system is controlled by a microprocessor system. The system has three independent circuit each consisting of 7 passive infra red sensors. The controller can be prog

Python implementation of a solver for the desert cro, Python implementation...

Python implementation of a solver for the desert crossing, Python Programming #Minimum 100 words accepted#

What is page-stealer process, What is Page-Stealer process? This is the...

What is Page-Stealer process? This is the Kernel process that makes rooms for the incoming pages, by swapping the memory pages that are not the part of the working set of a pro

Determine the input and output devices, I/O devices need to be matched up t...

I/O devices need to be matched up to computer application. -  Computer-aided design (graph plotters, large screens, etc.) -  Virtual reality (data gloves, data goggles, etc.)

Define atomic directive in fortan, Q. Define Atomic Directive in FORTAN? ...

Q. Define Atomic Directive in FORTAN? Atomic directive guarantees a specific storage location is updated atomically rather than exposing it to odds of multiple simultaneous wri

Perform on occurrence of an interrupt, Q. Perform on occurrence of an inter...

Q. Perform on occurrence of an interrupt? Determining these requirements let's work out steps that CPU should perform on occurrence of an interrupt. The CPU should find

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