What is input-output processors, Computer Engineering

Assignment Help:

Q. What is Input-output processors?

let's briefly summarize the development in area of input/output functions. These can be briefed as below:

1. CPU directly controls a peripheral device.

2. Addition of I/O controller or I/O interface: CPU employs programmed I/O with no interrupts. CPU was separated from details of external I/O interfaces.

3. Contained use of I/O controllers however with interrupts: CPU need not spend time waiting for an I/O operation to be executed, increasing efficiency.

4. Direct access of I/O interface to memory through DMA: CPU involvement decreased to at beginning and at end of DMA operation.

5. CPU directs I/O processors to execute an I/O program in memory. I/O processor fetches as well as executes these instructions with no CPU intervention. This permits CPU to specify a series of I/O activities and to be interrupted only when complete sequence has been performed. With this architecture a large set of I/O devices can be managed with minimum CPU involvement.

With last two steps (4 and 5) a main change takes place with introduction of concept of an I/O interface capable of executing a program. For steps 5 the I/O interface is frequently referred to as an I/O processor and I/O channel.


Related Discussions:- What is input-output processors

How reassembling of ip fragments is advantageous, Reassembling of IP fragme...

Reassembling of IP fragments at the ultimate destination is advantageous. Give reasons. Needing the ultimate destination to reassemble the fragments has two major advantages. F

Define the firewall design policy, Define the Firewall Design Policy ...

Define the Firewall Design Policy A lower-level policy that describes how the firewall will handle prevention of access and filtering of services as defined in the above net

What is the advantages for linux, What is the advantages for Linux? ...

What is the advantages for Linux? Runs on old Hardware Low-Cost Linux is fully customizable in all its components Powerful Linux runs on low-end, cheap hardware

Define the node of object oriented modeling, Define the node of object orie...

Define the node of object oriented modeling A node is a physical element which exists at runtime and represents a computational resource usually having a large memory and often

How do you traverse a btree in backward in-order, Put the node in the right...

Put the node in the right subtree Then, Put the root  Put the node in the left subtree

Explain communications and synchronization, Communications Parallel t...

Communications Parallel tasks normally have to exchange data. There are various manners in which this can be achieved like over a network or through a shared memory bus. The

Important steps of the boot process, Question: Computer forensic examin...

Question: Computer forensic examiners should be concerned with at least two important settings stored in RTC/NVRAM, which is accessed by the BIOS software most often called Set

Baic electrical, Ask question #Minimumstate and explain thevenins theorem a...

Ask question #Minimumstate and explain thevenins theorem as applicable to electrical circuits 100 words accepted#

Define syntax of mpi_scan function, Q. Define syntax of MPI_Scan  function...

Q. Define syntax of MPI_Scan  function? MPI_Scan (Sendaddr,, Receiveaddr , count, datatype, op, comm): It merges the partial values in p final results that are received in

What is a linker program, What is a linker program? Ans. links the prog...

What is a linker program? Ans. links the program with other programs required for its execution is called a linker program.

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