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

What is meant by latch, Latch is a D- type flip-flop used as a temporary st...

Latch is a D- type flip-flop used as a temporary storage device controlled by a timing signal, which can kept 0 or 1. The primary function of a Latch is data storage. It is used in

Explain the importance of computer architecture, Explain the importance of ...

Explain the importance of computer architecture Studying the architecture implies working on machine language programs. However, this isn't practical when we design a computer

Illustrate abstract class, What is an abstract class? Please, expand by exa...

What is an abstract class? Please, expand by examples of using both. Explain why?   Abstract classes are closely related to interfaces. They are classes that cannot be instanti

Boolean expression derived from this k-map, Let us see the pairs that can b...

Let us see the pairs that can be considered as adjacent in Karnaugh's here. The pairs are:  1)  The four corners  2)  The four 1's as in top and bottom in column 00 & 01

What are the special features of direct rdram, What are the special feature...

What are the special features of Direct RDRAM? It is a two channel Rambus It has 18 data lines intended to transfer two bytes of data at a time There are no divide

Bi polar junction transistor, draw input and output charectoristics of BJT ...

draw input and output charectoristics of BJT and justify CE configuration provides large current amplification

Explain busy tone in strowger telephony, Explain Busy tone in strowger tele...

Explain Busy tone in strowger telephony. Busy tone pattern is demonstrated in figure. This is a bursty 400 Hz signal with silence era in between. The burst and silence durati

State the term- use a define function, State the term- Use a define functio...

State the term- Use a define function This is almost exactly the same approach as #define and -D compiler arg that C programs use. In your  Verilog  code,  use  a  'define  to

Give the truth table of S-R and D-flipflops, Give the truth table of S-R an...

Give the truth table of S-R and D-flipflops. Ans: The Truth Table for S-R Flip-Flop is illustrated in Fig.(a) and truth table of D Flip-Flop is illustrated in Fig.(b)

Operating system., what is the minimum number of page faults for an optimal...

what is the minimum number of page faults for an optimal page replacement strategy?

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