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

Show the divide and conquer approach, Q. Show the Divide and Conquer approa...

Q. Show the Divide and Conquer approach? Divide and Conquer approach is the way of making a complicated problem easier.  In this approach larger problem (System) is divided int

Listening sockets, a) What command do you use to list all listening sockets...

a) What command do you use to list all listening sockets? The output should also contain the name of the program to which the socket belongs.   b) Write the command to use to

Which scheduler select process from secondary storage device, Which schedu...

Which scheduler selects processes from secondary storage device? Ans. Medium term scheduler selects processes from secondary storage device.

Explain synchronous dram, What is synchronous DRAM? Synchronous DRAM's ...

What is synchronous DRAM? Synchronous DRAM's are those whose operation is directly synchronized with a clock signal.

Which datatype cannot be used to define parameters, Which datatype cannot b...

Which datatype cannot be used to define parameters. Type F datatype is not used to explain parameters.

Design a BCD to excess 3 code converter using NAND gates, Design a BCD to e...

Design a BCD to excess 3 code converter using minimum number of NAND gates. Hint: use k map techniques. Ans. Firstly we make the truth table: BCD no

Example of the horizon problem, Example of the horizon problem: It is ...

Example of the horizon problem: It is also worth bearing in mind the horizon problem, however a game-playing agent cannot see much far satisfactory into the search space. Now

Implementing recursive function the data structure, For executing recursive...

For executing recursive function the data structure used is: For executing recursive function, stack is used as a data structure.

Define electronic data interchange, Define Electronic Data Interchange. ...

Define Electronic Data Interchange. An EDI stand for Electronic Data Interchange is used by organizations for transactions which occur on regular basis to a pre-determined for

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