Operating software updating method for use in e.g. bank, involves writing versions of software in memory, such that old versions are overwritten by new versions, and loading subsequent version with present invalidity of loaded version

摘要

The method involves temporarily writing successive versions of an operating software in a electrically erasable programmable read-only memory, such that the old versions are overwritten by new versions. The validity of the software is verified while loading the version of the software in the memory. The subsequent version of the software is loaded in the memory with present invalidity of the loaded version.