RAM image
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The RAM image is a firmware image for embedded systems resident on the system RAM. Generally embedded systems consist of some non-volatile flash and a larger amount of volatile RAM. The Ram Image consists of a 2nd stage bootloader, an OS Kernel and a RAMDisk with the root file system. Programs larger than the system flash can be loaded using a RAM Image or development work for newer functionality can be done using the RAM image since it vanishes once the system is power cycled leaving the original flash firmware untouched.