Input output techniques - computer architecture, Computer Engineering

Assignment Help:

Input Output Techniques:

o   Interrupt driven

o   Direct Memory Access (DMA)

o   Programmed

Programmed I/O

  •   CPU has control over I/O directly
  •   Read/write commands
  •   Sensing status
  •   Transferring data
  •   Wastes CPU time
  •   CPU waits for I/O module to finish operation
  •   I/O module performs operation
  •   I/O module sets status bits
  •   CPU requests I/O operation
  •   CPU checks status bits periodically
  •   I/O module doesn't inform CPU directly
  •   I/O module does not interrupt CPU
  •   Under programmed I/O data transfer is similar memory access (CPU viewpoint)
  •   Each device given unique identifier
  •   CPU may wait or come back later
  •   CPU commands have identifier (address)

I/O Mapping

  •   Large selection of the memory access commands available
  •   Memory mapped I/O

o   memory and Devices share an address space

o   I/O looks like memory read/write

o   No special commands for I/O

  •   Restricted set
  •   Isolated I/O

o   Separate address spaces

o   Need I/O or memory select lines

o   Special commands for I/O

 


Related Discussions:- Input output techniques - computer architecture

Give an example of problem statement, Give an example of Problem Statem...

Give an example of Problem Statement You should understand here that you are looking for a statement of requirements, not a proposal for the solution. OOA specifies structu

Coding advantages of casex or casez, Coding advantages of casex or casez ...

Coding advantages of casex or casez By using casex or casez has the following coding advantages: -  It reduces number of lines, especially if the number of bits had been m

Write an assembly function which hides the cursor, Q. Write an assembly fun...

Q. Write an assembly function which hides the cursor? Write an assembly function which hides the cursor. Call it from a C program.             . PUBLIC CUROFF

Define the firewall design policy, Define the Firewall Design Policy ...

Define the Firewall Design Policy A lower-level policy that describes how the firewall will handle prevention of access and filtering of services as defined in the above net

Define grid computing, GRID COMPUTING Grid Computing signifies applying...

GRID COMPUTING Grid Computing signifies applying resources of different computers in a network concurrently to a single problem for solving a scientific or technical problem wh

Block-level distributed parity, Given a RAID 5 (block-level distributed par...

Given a RAID 5 (block-level distributed parity) with k disks, how well will large block trnsmitted work? How well will it handle a high I/O request rate? Evaluate the performance t

Determine Boolean identities using Boolean algebra, Prove the following ide...

Prove the following identities   a. A ‾B ‾C‾ + A ‾BC ‾ + AB ‾C ‾ + ABC ‾ = C ‾ b. AB + ABC + A ‾ B + AB ‾C = B + AC Ans. a. LHS = A'B'C' + A'BC' + AB'C' + ABC' =

What is a session in php, A session is a logical object formed by the PHP e...

A session is a logical object formed by the PHP engine to permit you to preserve data across subsequent HTTP requests. There is only one session object available to your PHP scr

What is a mutable member, One that can be modified by the class even when t...

One that can be modified by the class even when the object of the class or the member function doing the modification is const.

Grid computing, Grid Computing means applying the resources of a lot of com...

Grid Computing means applying the resources of a lot of computers in a network simultaneously to a one problem for solving a scientific or a technical problem that needs a large nu

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