G - Physics – 06 – F
Patent
G - Physics
06
F
354/221, 354/230
G06F 11/00 (2006.01) G06F 1/30 (2006.01) G06F 11/14 (2006.01)
Patent
CA 1282177
ABSTRACT OF THE DISCLOSURE A device for preventing unintentional loss of data in a computer system as a result of electrical power interruption comprises an uninterruptible power supply, a monitor circuit for generating signals when the main power is interrupted and restored and for monitoring the condition of the uninterruptible supply, and an auxiliary memory circuit which is connected to the computer's data and address bus. The memory circuit includes a large non-volatile memory and a program stored in ROM which takes over control of the computer and is executed by the CPU when a power interruption is signalled by the monitor circuit. The program allows any operation already in progress to be completed and then directs a transfer of the computer's operating state and any application programs and operating system from the computer's RAM to the memory circuit's nonvolatile memory. When main power is restored, the ROM program directs the CPU to reload the application programs and operating system into the computer's RAM and to reset the state of the CPU.
543976
Byrd Kerry
Gowling Lafleur Henderson Llp
Universal Vectors Corporation
LandOfFree
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