Technology for selectively updating memory-resident images

A memory medium includes one or more binary images and an update logic image. The memory medium selectively updates binary images having contiguous memory sectors erased before being rewritten. The update logic image includes instructions for determining whether an updating operation is to be performed and determining memory addresses of the memory medium at which a corresponding replacement image can be recorded. The instructions are also for erasing the determined memory addresses and writing the replacement image to the determined memory addresses.