'Direct memory access' diaporamas de présentation

Chapter 4

Chapter 4. MICROPROCESSOR INPUT/OUTPUT. Outline . 4.1 Introduction 4.2 Simple I/O Devices 4.3 Programmed I/O 4.4 Unconditional and Conditional Programmed I/O 4.5 Interrupt I/O 4.6 Direct Memory Access (DMA) Summary of I/O. 4.1 Introduction.

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William Stallings Computer Organization and Architecture 9 th Edition

William Stallings Computer Organization and Architecture 9 th Edition. Chapter 3. A Top-Level View of Computer Function and Interconnection. Computer Components.

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Computer System Overview

Computer System Overview. Chapter 1. From: Operating Systems Internals and Design Principles by William Stallings. Operating System. Exploits the hardware resources of one or more processors Provides a set of services to system users Manages secondary memory and I/O devices. Basic Elements.

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Overview of Computer Organization

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I/O Management and Disk Scheduling (Chapter 11)

I/O Management and Disk Scheduling (Chapter 11). Perhaps the messiest aspect of operating system design is input/output A wide variety of devices and many different applications of those devices. It is difficult to develop a general, consistent solution. Chapter Summary I/O devices

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8086/8088 Microprocessor

8086/8088 Microprocessor Introduction to the processor and its pin configuration Topics Basic Features Pinout Diagram Minimum and Maximum modes Description of the pins Basic Features 8086 announced in 1978; 8086 is a 16 bit microprocessor with a 16 bit data bus

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8086/8088 Microprocessor

8086/8088 Microprocessor. Introduction to the processor and its pin configuration. Topics. Basic Features Pinout Diagram Minimum and Maximum modes Description of the pins. Basic Features. 8086 announced in 1978; 8086 is a 16 bit microprocessor with a 16 bit data bus

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Tuning the Guts

Tuning the Guts. Outline. Configuration. Tuning. Tuning IO priorities Tuning Virtual Storage Tuning for maximum concurrency Tuning for RAM locality The priority inversion problem Transferring large files How to throw hardware at a problem?. IO stack SSDs and HDDs RAID controller

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Input / Output interface

Input / Output interface. PERIPHERAL DEVICES. Input Devices. Output Devices. Keyboard Optical input devices - Card Reader - Paper Tape Reader - Bar code reader - Digitizer - Optical Mark Reader Magnetic Input Devices - Magnetic Stripe Reader

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DIRECT MEMORY ACCESS

DIRECT MEMORY ACCESS. CS 147 Thursday July 5,2001 SEEMA RAI. OVERVIEW . Introduction Implementing DMA in a computer system Data transfer using DMA controller Internal configuration of a DMA controller Process of DMA transfer DMA transfer modes Modification of the CPU to work with DMA

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Chapters 9 & 10 Peripheral Programming & Exceptions And Interrupts

Chapters 9 & 10 Peripheral Programming & Exceptions And Interrupts. Peripheral Programming. Peripheral programming is one of the most important reasons for studying assembly language. Implementing device drivers as interface between programs and I/O devices Three strategies

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Direct memory access Direct memory access (DMA) is a process in which an external device takes over the control of syst

Direct memory access Direct memory access (DMA) is a process in which an external device takes over the control of system bus from the CPU. DMA is for high-speed data transfer from/to mass storage peripherals, e.g. harddisk drive, magnetic tape, CD-ROM, and sometimes video controllers.

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Homework

Homework. Reading Tokheim, Section 13-5 (Three State Buffers only) Machine Projects Continue on MP5 Labs Continue labs with your assigned section. Buses.

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I/O Hardware

I/O Hardware. Incredible variety of I/O devices. I/O Hardware . Devices vary in many dimensions Direction Read, Write, Read-Write Character, Block Speed Latency, Transfer rate, Delay between operations Access Sequential, Random Sharing Sharable, Dedicated

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Real-Time Video Analysis on an Embedded Smart Camera for Traf?c Surveillance

Real-Time Video Analysis on an Embedded Smart Camera for Traf?c Surveillance. Presenter : Yu-Wei Fan. Outline. Introduction System Architecture Hardware Software Algorithm Stationary Vehicle Detection Algorithm Mapping External memory access Data transfer Number format issues

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Buses in a Graphics Context:

Buses in a Graphics Context:. PCI vs. AGP. Context: Why use a specialized bus?. Given: I/O takes a significant amount of time, esp. Graphics I/O. If Graphics I/O moves into separate bus, system buses freed up for other devices.

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DMA Versus Polling or Interrupt Driven I/O

DMA Versus Polling or Interrupt Driven I/O. Polling and Interrupt driven I/O concentrates on data transfer between the processor and I/O devices. An instruction to transfer (mov datain,R0) only occurs after the processor determines that the I/O device is ready

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Input and Output of a Processor

Input and Output of a Processor. Presented By Chandra Shekar Reddy.Y. Introduction. I/O systems generally place greater emphasis on dependability & cost. I/O systems must also plan for expandability and diversity of devices. Performance plays a small role for I/O systems.

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EET 450

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Introduction of Direct Memory Access (DMA)

Introduction of Direct Memory Access (DMA). Why is DMA?. It is wasteful to feed data into a controller register 1 bytes at a time. (PIO) The DMA unit is word. In the high loading environment, a system with DMA has better improvement. DMA transfer. DMA Progress.

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