Input - output devices using device controller, Computer Engineering

Assignment Help:

Q. Input - output Devices using Device Controller?

A device controller needs not to necessarily control a single device. It can typically control multiple I/O devices. It comes in form of an electronic circuit board which plugs directly in the system bus and there is a cable from controller to every device it controls. Cables coming out of controller are typically terminated at back panel of main computer box in form of connectors called as ports. 

The Figure below explains how I/O devices are associated to a computer system through device controllers. Please note the subsequent points in figure:

  • Every I/O device is linked through a hardware interface known as I/O Port.
  • Single and Multi-port device manages single or multi-devices.
  • Communication between Memory and I/O controller is through bus only in case of Direct Memory Access (DMA) whereas path passes through CPU for these kind of communications in case of non-DMA.

690_Devices using Device Controller.png

Figure: Connecting I/O Devices using Device Controller


Related Discussions:- Input - output devices using device controller

How many bits require in TCP protocol header checksum, In TCP protocol head...

In TCP protocol header "checksum" is of___________? In protocol header of Transfer Control Protocol checksum is of 16 bits.

How to select valid lines for secondary list, How to select valid lines for...

How to select valid lines for secondary list? To stop the user from selecting invalid lines, ABAP/4 offers various possibilities.  At the end of the processing block END-OF-SEL

Explain the stack storage allocation model, Explain the stack storage alloc...

Explain the stack storage allocation model. In a stack-based allocation, all objects are allocated in last-in, first-out data structure and a stack. For example: Recursive subr

Define in detail about the architecture, Define in detail about the Archite...

Define in detail about the Architecture Architecture is the set of resources visible to machine language programmer: Registers, the memory, data representations, instructions

Dos function calls, INT 21H supports about 100 different functions. A funct...

INT 21H supports about 100 different functions. A function is recognised by putting the function number in AH register. For illustration if we want to call function number 01 then

The goal of hashing, The goal of hashing is to produce a search that takes ...

The goal of hashing is to produce a search that takes   O(1) time

Device drivers in ms-dos, In MS-DOS device drivers are installed and loaded...

In MS-DOS device drivers are installed and loaded dynamically it implies that they are loaded into memory when computer is started or re-booted and accessed by operating system as

Why does microprocessor contain rom chips?, Microprocessor have ROM chip be...

Microprocessor have ROM chip because it have instructions to implement data. It have the monitor program which not only include implementation instruction but also interfacing

How do you find out the flaw, How do you find out the flaw, which of the ad...

How do you find out the flaw, which of the address getting written wrongly. Fill the full memory once with either random data or sequential data then after filling totally rea

Explain transport layer of osi model, Explain Transport Layer of OSI Mode...

Explain Transport Layer of OSI Model. The transport layer utilizes the services provided through the network layer, as best path selection and logical addressing, to give end

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