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Custom firmware, also known as aftermarket firmware, is an unofficial new or modified version of firmware created by third parties on devices such as video game consoles, mobile phones, and various embedded device types to provide new features or to unlock hidden functionality.
Firmware hacks usually take advantage of the firmware update facility on many devices to install or run themselves. Some, however, must resort to exploits to run, because the manufacturer has attempted to lock the hardware to stop it from running unlicensed code. Most firmware hacks are free software.
Point releases are the off-white boxes in the diagram. A patch release (often colloquially also known as a point release, dot release, or bugfix release) is a software release of a product or other project, especially one intended to fix bugs or do small cleanups rather than add significant features.
An over-the-air update (or OTA update), also known as over-the-air programming (or OTA programming), [1] is an update to an embedded system that is delivered through a wireless network, such as Wi-Fi or a cellular network. [2] [3] [4] These embedded systems include mobile phones, tablets, set-top boxes, cars and telecommunications equipment.
During an installation of a computer program, it is sometimes necessary to update the installer or package manager itself. To make this possible, a technique called bootstrapping is used. The common pattern for this is to use small executable files which update the installer and starts the real installation after the update.
This pattern can be generalized to updating. In the event of an update, the hot spare would activate, the main system would update, and then the updated system would resume control. The earliest true Dynamic Software Updating system is DYMOS (Dynamic Modification System). [4]
The record-setting Scaled Composites GlobalFlyer was designed with the help of Hypersizer, [2] as well as the Lunar Atmosphere and Dust Environment Explorer. [ 8 ] Earlier codes were originally intended for weight prediction but evolved into ones that were able to assess structural integrity and find optimum sizes and materials.
Over time, the meaning has shifted to an update that is created with urgency or released outside the normal update cycle for the software. Applying (installing) a hotfix generally involves the same process as any software update. Most modern operating systems and desktop applications can download and apply updates automatically.