What is input - output commands, Computer Engineering

Assignment Help:

Q. What is Input - Output commands?

There are four kinds of I/O commands which an I/O interface can receive when it's addressed by a processor:

Control: This type of commands is device specific and is used to give specific instructions to device for example a magnetic tape requiring rewinding and moving forward by a block.
Test: This command checks status like if a device is ready or not or is in error condition.
Read: This command is helpful for input of data from input device.
Write: this command is employed for output of data to output device.

Related Discussions:- What is input - output commands

Control dependence, Control Dependence Segments or Instructions in a pr...

Control Dependence Segments or Instructions in a program may obtain control structures. Thus, dependency between the statements can also be in control structures. But the order

What are set up time and hold time constraints, What are set up time and ho...

What are set up time and hold time constraints? What do they mean? Which one is crucial for establishing maximum clock frequency of a circuit? Set up time is the amount of time

How do we call one script-fu script from another, he trick to calling scrip...

he trick to calling script-fu-scripts from any more script is to just reference the main define for the script and not to try to use the pdb call. All the scripts in script-fu shar

What do you mean by parallel virtual machine, Q.What do you mean by Paralle...

Q.What do you mean by Parallel virtual machine? PVM is essentially a simulation of a computer machine running parallel programs. It is a software package which allows a heterog

Advantages and drawbacks of mealy and moore machine, What are the advantage...

What are the advantages and drawbacks of mealy and moore machine? Advantages and drawbacks: Into Mealy as the output variable is a function both state and input, changes o

Number system, Number systems Consider a decimal number: ...

Number systems Consider a decimal number: 7654.32 Short hand for: 7 * 103 + 6*102 + 5* 101 + 4*100 + 3*10 -1 + 2*10 -2 Likewise

What is garbage collection and what is it used for, In computer science, ga...

In computer science, garbage collection (GC) is a form of automatic memory management. The garbage collector, or just collector, attempts to reclaim garbage, or memory occupied by

What are limitations of assembly language, What are limitations of assembly...

What are limitations of assembly language? i. It is changed to machine language using assembler which is time consuming when compared with machine language. ii. It is comple

Write a program to event advertised, A museum has a collection of old poste...

A museum has a collection of old posters advertising events of various kinds (theatre, sport, fairs, lectures etc.). It wishes to keep a record of these, containing, for each poste

What is a data class, What is a Data Class? The Data class verifies in ...

What is a Data Class? The Data class verifies in which table space the table is stored when it is formed in the database

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages