Abstract: A method for suspending and resuming a computer system without being affected by an abnormal power failure. The relevant operating information and context of the related devices are stored in both a memory and a hard disk before the computer system enters into a sleep state. If a power failure occurs, relevant operating information of the system can still be fetched from the hard disk to restore the computer system to its original operating state even though the information saved in the memory is lost. Also, the computer system can self turn on and activate a “wake on LAN” function and a “ring in wake up” function when power resumes after a sudden power failure before entering into the soft-off state. Therefore, users and system administrator can wake up the computer system from a remote site in a very convenient way.

Abstract: The invention provides a voltage regulating device for regulating the operating voltage of a CPU in a computer system. The voltage regulating device includes a voltage identification signal regulator and a voltage identification signal bridge. The voltage identification signal regulator is controlled by a controlling signal to output a voltage identification regulating signal to the voltage converter. In this case, the voltage converter outputs the operating voltage of the CPU according to the voltage identification regulating signal. Meanwhile, a voltage monitor is used to monitor the operating voltage. When the voltage identification signal regulator outputs the voltage identification regulating signal, a voltage identification signal bridge blocks a default voltage identification signal output from the voltage identification signal setting device.