about flag instructions, Basic Computer Science

Assignment Help:
They straightforwardly affect the content of the flags.
CLC
CLD
CLI
CMC
STC
STD
STI
CLC INSTRUCTION
Reason: To uncontaminated the cartage flag.
Syntax:
CLC
This instruction turning the bit corresponding to the cartage flag, or in extra words it puts it on zero.
CLD INSTRUCTION
Reason: To uncontaminated the address flag.
Syntax:
CLD
This instruction exits the corresponding bit to the address flag.
CLI INSTRUCTION
Reason: To uncontaminated the interruption flag.
Syntax:
CLI
This instruction exits the interruptions flag, disabling this way those maskarable interruptions.
A maskarable interruptions is that one whose functions are disabled when IF=0.
CMC INSTRUCTION
Reason: To balance the cartage flag.
Syntax:
CMC
This instruction goes together the state of the CF flag, if CF = 0 the instructions equals it to 1, and if the instruction is 1 it equals it to 0.
We might say that it only "inverts" the value of the flag.
STC INSTRUCTION
Reason: To make active the cartage flag.
Syntax:
STC
This instruction locates the CF flag in 1.
STD INSTRUCTION
Reason: To make active the address flag.
Syntax:
STD
The STD instruction puts the DF flag in 1.
STI INSTRUCTION
Reason: To set in motion the interruption flag.
Syntax:
STI
The instruction sets off the IF flag, and this enables the maskarable external interruptions ( the ones which only function when IF = 1).

Related Discussions:- about flag instructions

Differentiate Preemptive and Nonpreemptive Scheduling?, The Scheduling algo...

The Scheduling algorithms can be divided into two parts with respect to how they deal with clock interrupts. 1) Nonpreemptive Scheduling: A scheduling

Perform a mail merge to send invitation, Question Elaborate the various...

Question Elaborate the various steps in performing a Mail Merge. Perform one mail merge operation for sending invitation for a conference which is being conducted in your organ

Artificial intelligence-general considerations for search, General Consider...

General Considerations for Search If we can specify the first state, the operators and the goal check for a look for difficulty, then we know where to create, how to move and w

Operating system services, Operating system services: In this section ...

Operating system services: In this section we consider basic services supported by an operating system. There are many building blocks to be considered, not all of which will

What is a stateless and and a stateful server, StatefulServer, maintains so...

StatefulServer, maintains some information between requests. Requires smaller messages, since some information is kept between contacts, example: FTP, telnet. Stateless Server req

What is vpn? explain the vpn protocols, Question 1 What is IT auditing? Di...

Question 1 What is IT auditing? Discuss the three phases involved in the IT auditing Question 2 List and explain the two types of load balancing methods Question 3

Internal storage, Internal Storage: Internal storage is also known as ...

Internal Storage: Internal storage is also known as main, primary, or (for historical reasons) core storage, or, memory. It is used to hold those instructions and data require

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