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

Determine the binary equivalent of hexadecimal FA, The binary equivalent of...

The binary equivalent of (FA) 16   is ? Ans. (FA) 16 = (11111010) 10

Convert, haw to convert context free grammar to regular grammar

haw to convert context free grammar to regular grammar

Determine the object oriented features, Object Oriented Analysis  T h...

Object Oriented Analysis  T he basics of object oriented analysis with the help of object oriented features. Analysis  Analysis is not a solution of the problem. We w

Salient features of a parallel programmable interface-8255, Determine the s...

Determine the salient features of a parallel programmable interface, 8255. 24 I/O lines in 3 8-bit port groups - A, B, C A, B can be 8-bit input or output ports C

The method(s) of payment for online consumers, The method(s) of payment for...

The method(s) of payment for online consumers are A) Electronic cash    (B) Credit/debit C) Electronic checks

Explain about shared features of olap, Shared executes most of the security...

Shared executes most of the security features into OLAP. If multiple accesses are needed admin can make essential changes. The default security level for all OLAP products is read

What is pattern, What is pattern? A pattern is a proven solution to a g...

What is pattern? A pattern is a proven solution to a general problem. Lots of patterns are used. There are patterns for analysis, architecture, design and execution. Patterns c

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

Explain the term - instruction execution, Explain the term - Instruction ex...

Explain the term - Instruction execution We  know  that  the  fundamental  function  performed  by  a  computer  is  the  execution  of  program. The program that is to be exec

What is secondary list, What is secondary list? It permits you to enha...

What is secondary list? It permits you to enhance the information presented in the basic list.  The user can, for example, select a line of the basic list for which he require

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