Method of Data Protection for Computers
OwnerLung-Chiao Chang, Chih-Hung Chen +2inventors
InventorsLung-Chiao Chang, Chih-Hung Chen, Yunn-Hung Liao, Hsin-Hua Wen
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Abstract
A data protection method includes switching a power source of a dual bank DRAM to a battery when external power fails, and placing a bank 1 of the dual bank DRAM into a self refresh mode. A data protection method further includes checking if a power failure occurred previously when a computer is turned on, initializing the bank 0 of the dual bank DRAM and initializing the SMI routine, and enabling the bank 1 of the dual bank DRAM if a power failure occurred. Thus, valuable data retained in the DRAM is prevented from being damaged or lost.
Claims20
A method of data protection comprising:
- examining if there is an external power failure when a computer enters into a system management interrupt (SMI) routine;
- setting a protective flag to a first value when there is an external power failure;
- switching power of a dual-bank random access memory (DRAM) to a battery;
- and
- setting a first bank of the dual-bank DRAM into a self refresh mode.
A method of data protection comprising:
- examining if external power fails when a computer enters into a system management interrupt (SMI) routine;
- and
- setting a protective flag to a second value when there is an external power failure.
A method of data protection comprising:
- examining if there is an external power failure before a computer is turned on;
- initializing a second bank of a dual bank random access memory (DRAM) when there is an external power failure before the computer is turned on;
- initializing a system management interrupt (SMI) routine of the computer after the second bank of the dual bank DRAM is initialized;
- and
- a first bank of the dual-bank DRAM leaving a self refresh mode after the SMI routine is initialized.
Dependencies are inferred from the claim text.