ESCD (Extended System Configuration Data)

A specification that provides the BIOS and operating system a means for communicating with plug-and-play devices. As the computer boots, the BIOS records legacy device configuration information. Plug-and-play devices use this information to configure themselves and avoid conflicts. When an adapter has resources assigned and the resources are saved in ESCD, the resources do not have to be recalculated unless a new device is added to the computer.

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