Dma controllers - computer architecture, Computer Engineering

Assignment Help:

DMA controllers in computer system:

  •   DMA Controller
  •   Part of the I/O device interface
  •   DMA Channels
  •   Performs functions that in general would be performed by the processor
  •   Bus signals that control transfer
  •   Provides memory address
  •   Keeps track of number of transfers
  •   Under control of the processor

INTERFACE CIRCUITS

o   Provides a storage buffer for at least one word of data.

o   Circuitry required connecting an I/O device to a computer bus

o   Contains address-decoding circuitry

o   Contains status flag that can be accessed by the processor.

o   Generates the appropriate timing signals required by the bus control scheme.

o   Performs format conversions

o   Ports

o  Parallel port

o  Serial port

Keyboard to processor connection

8_DMA controllers.png

 


Related Discussions:- Dma controllers - computer architecture

Provision for data buffering, Data buffering is quite helpful for purpose o...

Data buffering is quite helpful for purpose of smoothing out gaps in speed of processor and I/O devices. Data buffers are registers that hold I/O information temporarily. I/O is pe

How can data and instructions are put into the computers, Q. How can data a...

Q. How can data and instructions are put into the computers? The data and instructions to a computer are provided by external environment. It determines that input devices are

What is full trust, What is Full Trust? Your code is permitted to do an...

What is Full Trust? Your code is permitted to do anything in the framework, meaning that all (.Net) permissions are granted. The GAC has Full Trust because it's on the local HD

Define situation as transmitter & receiver, The situation when both transmi...

The situation when both transmitter and receiver have to work in tandem is referred to as? The situation while both transmitter and receiver have to work into tandem is termed

Padovan string , A Padovan string P(n) for a natural number n is defined as...

A Padovan string P(n) for a natural number n is defined as: P(0) = ‘X’ P(1) = ‘Y’ P(2) = ‘Z’ P(n) = P(n-2) + P(n-3), n>2 where + denotes string concatenation. For a string of t

How to transmits data in the active message buffer, Q. How to Transmits dat...

Q. How to Transmits data in the active message buffer? int pvm_bcast( char *group, int msgtag ) Transmits data in the active message buffer to a group of processes. msgt

Common functions of interrupts - computer architecture, Common Functions of...

Common Functions of Interrupts: An Interrupt transfers control to the interrupt service routine, generally through the interrupt vector table, which contains the addresses

Properties of e-cash, Properties: 1.  Monetary Value: Monetary value mu...

Properties: 1.  Monetary Value: Monetary value must be backed by either cash, bank - authorized credit cards or bank certified cashier's cheque. 2.  Interoperability: E-cash

Reading decision trees, Reading Decision Trees: However we can justifi...

Reading Decision Trees: However we can justified by see that a link between decision tree representations and logical representations that can be exploited to make it easier t

Explain the matlab language, This is a high-level matrix/array language wit...

This is a high-level matrix/array language with control flow statements, functions, data structures, input/output, and object-oriented programming features. It permits both "progra

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