| 摘要 |
A computer system for system recovery from power loss includes a central processing unit and an activation means for starting up the computer. The computer system also has a cold boot circuit, a system controller, volatile read/write memory, and non-volatile read/write memory. The controller includes a protection register whose value indicates the manner in which the computer system was previously shut-down. One aspect of the present invention is a method for an orderly shut-down which includes the steps of compressing all critical data stored in volatile read/write memory, transferring the compressed critical data into non-volatile read/write memory, writing memory validity data to indicate a successful store and the time and date stored, and shutting down the system. Another aspect of the present invention is a method for system recovery which includes the steps of utilizing the protection register and memory validity data to both recover system and user data if possible and perform only the necessary start-up steps, and setting the protection register to indicate that an orderly shut-down has not occurred.
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