Computer with shadow storage for recovery

摘要

There is provided an electronic apparatus which is capable of preventing loss of edited operation data even if a user fails to perform a saving operation on the edited operation data. A shadow storage stores n pieces of operation data for controlling operation of the electronic apparatus. A current storage stores operation data being currently used to control operation of the electronic apparatus and including a piece of operation data as initial data selected from the n pieces of operation data stored in the shadow storage. Responsive to operation of the operator, a CPU changes the contents of the operation data stored in the current storage. Responsive to operation of the operator, the CPU selects a piece of operation data as currently selected operation data from the n pieces of operation data stored in the shadow storage that is different from an immediately preceding selected piece of operation data, updates the immediately preceding selected piece of operation data in the shadow storage by the operation data stored in the current storage, and saves the currently selected operation data in the current storage.