Håndtering af en computer under tab og tilbagevenden af forsyning

摘要

A computerized system (10) for a postage meter responds to imminent loss of power by storing crucial data to a safe storage area. The system has a primary power source (46) and a backup power source (47). A comparator (50) is arranged to provide a signal indicative of the loss and restoration of primary power. The comparator is responded to in the event of primary power loss by the system entering a power-down routine in which the non-volatile memory is not accessed.