System Resource

A tool used by either hardware to alert software of a need or by software to control a function of hardware. Hardware and software need a way to communicate with each other, and they do so by using a combination of four system resources:

  • IRQ Hardware devices use the IRQ bus on a motherboard to signal the CPU for attention.
  • port addresses Software addresses a hardware device using the device s port, or I/O, address. The device “listens” to the bus to determine if it is being requested.
  • memory addresses Software communicates with physical memory located in either RAM or ROM chips using memory addresses.
  • DMA channel Data travels back and forth between memory and a hardware device using this channel.

Webopedia Staff
Since 1995, more than 100 tech experts and researchers have kept Webopedia’s definitions, articles, and study guides up to date. For more information on current editorial staff, please visit our About page.

Top Articles

The Complete List of 1500+ Common Text Abbreviations & Acronyms

From A3 to ZZZ we list 1,559 SMS, online chat, and text abbreviations to help you translate and understand today's texting lingo. Includes Top...

List of Windows Operating System Versions & History [In Order]

The Windows operating system (Windows OS) refers to a family of operating systems developed by Microsoft Corporation. We look at the history of Windows...

How to Create a Website Shortcut on Your Desktop

Website Shortcut on Your Desktop reviewed by Web Webster   This Webopedia guide will show you how to create a website shortcut on your desktop using...

Generations of Computers (1st to 5th)

Reviewed by Web Webster Learn about each of the 5 generations of computers and major technology developments that have led to the computing devices that...

Docker

Docker is an open-source platform used for developing and running applications by allowing...

Blockchain

Blockchain is one of the core technologies behind cryptocurrency. Blockchain is a system...

Cached Data

Cached data is designed to improve the user experience when browsing the internet...