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Device configuration overlay (DCO) is a hidden area on many of today's hard disk drives (HDDs). Usually when information is stored in either the DCO or host protected area (HPA), it is not accessible by the BIOS (or UEFI), OS, or the user. However, certain tools can be used to modify the HPA or DCO.
Device configuration overlay, of a computer hard disk drive; Digitally controlled oscillator, in electronics; Siemens DCO, a telephone switch; Drift City Online, a game; Domain controller, on Microsoft Servers; Developer Certificate of Origin, used in open source software projects to verify individual contributions
In computing, hardware overlay, a type of video overlay, provides a method of rendering an image to a display screen with a dedicated memory buffer inside computer video hardware. The technique aims to improve the display of a fast-moving video image — such as a computer game , a DVD , or the signal from a TV card .
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In the home computer era overlays were popular because the operating system and many of the computer systems it ran on lacked virtual memory and had very little RAM by current standards: the original IBM PC had between 16K and 64K, depending on configuration. Overlays were a popular technique in Commodore BASIC to load graphics screens. [2]
DeviceConfig encompasses the configuration details for specific devices, including default, Phone, Tablet, PC, TV, Car, Wearable, liteWearable, and smartVision. The settings under the default label apply to all devices. If there are unique requirements for other devices, the settings under the respective device type label need to be configured.
A list of icon overlays is specified in the Windows Registry in the location mentioned further in this article. In the current implementation there are 4 bits in a structure that define the overlay index providing for a maximum of 15 overlays, 4 of which are reserved by the operating system. [1]
However, some modern SoCs (for example, Freescale i.MX6) have a vendor-provided boot loader with device tree on a separate chip from the operating system. [4] A proprietary configuration file format used for similar purposes, the FEX file format, [5] is a de facto standard among Allwinner SoCs. Devicetree is widely used for ARM-based Android ...