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

Explain vector processing issues in pipelining, Vector Processing   A...

Vector Processing   A vector is an ordered set of similar type of scalar data items. The scalar tem may be a logical value, an integer or a floating point number. Vector proce

Difference between a null pointer and a void pointer, A NULL pointer is a p...

A NULL pointer is a pointer of any type whose value is zero. A void pointer is a pointer to an object of an unknown type, and is guaranteed to have sufficient bits to hold a pointe

Why did some plug-ins disappear for 0.99.19, Some of the plug-ins have prov...

Some of the plug-ins have proven unstable. These have been moved into a split download, which should be available anywhere you got the GIMP, in the file gimp-plugins-unstable-VERSI

Linux, Explain about unix file system architecture

Explain about unix file system architecture

Determine the boolean expression using k-map, Reduce the following equation...

Reduce the following equation using k-map Y = BC‾D‾ + A‾BC‾D + ABC‾D + A‾BCD + ABCD Ans. Multiplying the first term with (A+A') Y = A'BC'D' + ABC'D' + A'BC'D + ABC'D + A'BCD +

What are the counters, What are the Counters? 1. The Counter is a seque...

What are the Counters? 1. The Counter is a sequential circuit which consists of a set of flip flops connected in a appropriate manner to count the sequence of input pulses.

Explain region, What is a Region? A Region is a continuous area of a p...

What is a Region? A Region is a continuous area of a process's address space (like text, data and stack). The kernel in a "Region Table" that is local to the process mainta

Explain a multiprocessing operating system, Explain a multiprocessing opera...

Explain a multiprocessing operating system? A multiprocessing system is a computer hardware configuration which contains more than one independent processing unit. Multiprocess

Ring, Ring This is a easy linear array where the end nodes are connecte...

Ring This is a easy linear array where the end nodes are connected.  It is equivalent to a engage with wrap around connections. The data transmit in a ring is normally one dire

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