Patent ID: 6266786
Filing Date: 2001-07-24
Classification: G06F

Abstract:
A method for use on a computer system with a CMOS RAM unit powered by a battery unit to safeguard the CMOS RAM data when the battery power from the battery unit is below working level, comprising the steps of:(1) in power-off state, detecting whether the current power level of the battery unit is below working level; if yes, performing the substeps of:(1-1) turning on the main power of the computer system;(1-2) moving the data currently stored in the CMOS RAM unit to a backup-data storage unit; and(1-3) turning off the main power of the computer system;(2) at the next time the computer system is powered on, moving the data currently stored in the backup-data storage unit back to the CMOS RAM unit; and(3) displaying a message requesting the user to replace the battery unit with a new one.