Programmed input - output technique for computers, Computer Engineering

Assignment Help:

Q. Programmed input - output technique for computers?

Programmed input/output is a useful I/O technique for computers where hardware costs need to be minimised. Input or output operation in these cases may involve:

a)  Transfer of data from I/O device to processor registers.

b)  Transfer of data from processor registers to memory.

With programmed I/O method responsibility of processor is to constantly check status of I/O device to check whether it's free or it has completed inputting data. So this method is quite time consuming where processor wastes so much time in checking and verifying status of an I/O device. Figure (a) gives an illustration of use of programmed I/O to read in a block of data from a peripheral device into memory.


Related Discussions:- Programmed input - output technique for computers

Show packing and unpacking data, Q. Show Packing and Unpacking Data? P...

Q. Show Packing and Unpacking Data? Packing and Unpacking Data  pvm_packs - Pack active message buffer with arrays of prescribed data type: int info = pvm_pac

Find the average of two values, Q. Find the average of two values? Find...

Q. Find the average of two values? Find the average of two values which are stored in  ; Memory locations named FIRST and SECOND  ; And puts result in memory location AVG

Shared memory model, In the shared-memory programming model, tasks share a ...

In the shared-memory programming model, tasks share a common address space, which they read and write asynchronously. Several mechanisms such as locks / semaphores may be used to c

Minimum and maximum algorithm, For this assignment, you will need to create...

For this assignment, you will need to create an ARM assembly language code routine that implements an algorithm to search through an array and find BOTH the minimum and maximum val

Overflow or underflow for floating point numbers, In floating point numbers...

In floating point numbers when so you say that an overflow or underflow has occurred? Ans: A) In single precision numbers when an exponent is less than +127 then we say that

Explain the matlab language, This is a high-level matrix/array language wit...

This is a high-level matrix/array language with control flow statements, functions, data structures, input/output, and object-oriented programming features. It permits both "progra

Define a formal system, Q. Define a Formal System? A Formal System is o...

Q. Define a Formal System? A Formal System is one which is planned in advance and is used according to schedule. In this system procedures and policies are documented well in a

Explain the term granularity, Granularity In 'Parallel computing', Gran...

Granularity In 'Parallel computing', Granularity can be defined as a qualitative assess of the ratio of computation to communication. 1) Coarse Granularity - relatively hug

How many words can be acquired by the word universal, How many words can be...

How many words can be acquired by arranging the letters of the word 'UNIVERSAL' in different way? In how many of them  (i)  E, R, S takes place together (ii)  No two of the

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