Patent ID: 6895517

Claim:
A power management process, to control a power state of a computer system that comprises a CPU, a chipset, a system RAM and a BIOS ROM, wherein the BIOS ROM comprises a BIOS program to initialize the computer system, the power management process comprising: detecting whether a power management event occurs; generating a system interrupt when the power management event occurs; providing a first memory address segment with a memory space to the system RAM to execute a service routine of the system interrupt of the BIOS program; driving the CPU to execute the service routine of the system interrupt irrelevant to the system RAM at the first memory address segment of the system RAM via the BIOS program; driving the CPU to execute a service program of the system interrupt to synchronize an operation frequency of the system RAM with an operation frequency of the CPU at a memory address segment of the BIOS ROM; and executing a power management control command to drive the computer system to enter a specific sleeping state.