Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Interrupt - Driven Input-output?
Problem with programmed I/O is that processor has to wait a long time for I/O interface to see whether a device is free or waits until completion of I/O. Result is that the performance of processor goes down extremely. What is the solution? What about processor going back to do other useful work without waiting for I/O device to finish or get freed up? However how will processor be intimated about completion of I/O or a device is ready for I/O? A well-organized mechanism was considered for this which is referred to as interrupt-driven I/O. In this mechanism provision of interruption of processor work once device has completed I/O or when it's ready for I/O has been provided.
Interrupt-driven I/O mechanism for transferring a block of data is displayed in Figure 5(b). Please note after issuing a read command (for input) CPU goes off to do some other useful work whereas I/O interface proceeds to read data from connected device. On completion of an instruction cycle CPU checks for interrupts (that will happen when data is in data register of I/O interface and it now requires CPU's attention). Now CPU saves important register and processor status of executing program in a stack and requests I/O device to provide its data that is placed on data bus by I/O device. After taking needed action with data CPU can go back to program it was executing before interrupt.
The extra key inserted at the end of the array is called a Sentinel is the extra key inserted at the end of the array
Stata about the Magnetic stripes These comprise information/data stored on magnetic material often on the back of a credit/debit card; the information is automatically read b
nfa significance
Differentiate between program translation and program interpretation. The program translation model makes the execution gap through translating a program written in a program
What are the advantages and drawbacks of mealy and moore machine? Advantages and drawbacks: Into Mealy as the output variable is a function both state and input, changes o
, an HTML 4.0 element supported by Netscape6 and MSIE, defines a set of text which is associated with a specific form element. For illustration, code belo
What is use case and use case diagram? A use case is a coherent piece of functionality that a system can give by interacting with actors. Use case includes one or more actors a
Building on their knowledge of research methods and their interest in a particular aspect of information technology this assessment enables students to put this knowledge into prac
Within micro controller's software, it is very useful to be able to manipulate binary bits i.e. from ports etc. The ALU has command to shift data, rotate data, compare data, set/cl
What is associative search? The cost of an associative cache is higher that the cost of a direct mapped cache due to the need to search all 128 bit tag patterns to verify wheth
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd