Input Output processor | COA | Lec-58 | Bhanu Priya

Computer Organization and Architecture (COA)
input output processor

Class Notes ( pdf )

[oneshotloksewa]

An input-output processor (IOP) is a processor with direct memory access capability. In this, the computer system is divided into a memory unit and number of processors.

Each IOP controls and manage the input-output tasks. The IOP is similar to CPU except that it handles only the details of I/O processing. The IOP can fetch and execute its own instructions. These IOP instructions are designed to manage I/O transfers only.

Block Diagram Of I/O Processor
Below is a block diagram of a computer along with various I/O Processors. The memory unit occupies the central position and can communicate with each processor.

The CPU processes the data required for solving the computational tasks. The IOP provides a path for transfer of data between peripherals and memory. The CPU assigns the task of initiating the I/O program.

The IOP operates independent from CPU and transfer data between peripherals and memory.

Input/Output Processor


The communication between the IOP and the devices is similar to the program control method of transfer. And the communication with the memory is similar to the direct memory access method.

In large scale computers, each processor is independent of other processors and any processor can initiate the operation.

The CPU can act as master and the IOP act as slave processor. The CPU assigns the task of initiating operations but it is the IOP, who executes the instructions, and not the CPU. CPU instructions provide operations to start an I/O transfer. The IOP asks for CPU through interrupt.

Instructions that are read from memory by an IOP are also called commands to distinguish them from instructions that are read by CPU. Commands are prepared by programmers and are stored in memory. Command words make the program for IOP. CPU informs the IOP where to find the commands in memory.

[saurabhdhingraa]

Thank you for such an amazing playslist helped me complete my syllabus in time.

[Saikiran-pqno]

Tq madam .. your guidance for this lesson clss iam wrote my exam wonderfully 😊

[JaffarHussain]

Please solve this question
1- What is the computer system components?
2- Please give a few examples of Application programs, Hardware Computer System
Components.
3- Are following attributes true for I/O Structure?
A. Each device controller has a controller.
B. Each local buffer is in charge of a particular device type.
C. CPU moves data from/to main memory to/from local buffers
D. Each device controller is in charge of a particular device type
4- What is default unit of computer storage size that contain one of two values, 0 and
1?
A. One bit
B. One word
C. One byte
D. Gigabyte
5- What does the Caching exactly do?
6- List the Advantages of Multiprocessors systems?
7- What is Bootstrap program designed for?
A. bootstrap program is loaded at ROM or reboot
B. Initializes all firmwareof system
C. Loads operating system kernel and starts execution
8- What is the responsibility of Secondary storage, Symmetric Multiprocessing,
Asymmetric clustering, Timesharing?
9- Please give the parallel systems types for Computer-System Architecture?
10- What does the cluster system exactly do?
11- What is Operating System Definition?
12- What are the (CPU scheduling, swapping, Virtual memory, job scheduling) are
used for?
13- What is the kernel?
14- How a Modern Computer Works draw and explain?

[JyotiSharma-jxou]

Thnkyouuu man your lectures really very helpful 😇😇😇😇

[mohdshahil]

Please keep on writing notes simultaneously....it helps us to make Rest all is good👌👌👍👍

[sirishtadepalli]

Ma’am. I understand English is not your first language and appreciate you making a video for us English speakers. However, for future videos, please write down a script of everything you’re going to say in the video and just read it while pointing to stuff. You were repeating the same thing over and over and it was very hard to understand you.

[thedeepanshu]

mam aapne 5:13 pr jo bola system bus training vo smjh nhi aaya. kya bola aapna

[kaurnavjeet]

isn, t cpu time wasted in this also when it becomes a slave and i/o processor becomes master?

[mottatinarsimhareddy]

Mam plz explain the principle of interleaving in computer

[amanrathore]

pls can you use hindi somewhere in video to explain it in fluency ...regards

[YD]

maam can you please go step by step...!

[himanshudewan]

Then what's the difference between DMA and IOP?

[sriadityach]

Mam plz upload vedio on serial communication

[cbalireddy]

Madam serial communication video cheyadi mam

[anuragnaik]

She reads sentence from textbook and then explains!

Confusion!!!!

[oneshotloksewa]

maaam, eska acha voice over kar lete, kuch samaj naji aaya

[sachinbaghel]

this my humble request, don't polish ur nails bcz they distract nd one more thing, ,, u r a GREAT

[faheemahmadofficial]

please dont use coming to next topic!! it is not correct in English /