Method and apparatus for a backup power controller for volatile

Details Method and apparatus for a backup power controller for volatile Method and apparatus for a backup power controller for volatile

1990-12-07

1993-04-20

Richardson, Robert L.

Static information storage and retrieval

Magnetic bubbles

Guide structure

365229, G06F 1216

Patent

active

052049639

ABSTRACT:
A method and apparatus for a software actuable backup power controller for selectively controlling power to a volatile random access cache memory. If memory does not contain any data that needs to be retained during a primary power failure the controller isolates memory from the backup power supply during the power failure. Only when the memory contains data to be retained during a power failure will memory be treated as non-volatile and is the backup power supply connected to memory on primary power failure. By selectively enabling the backup power supply with software commands from the computer, a suitable cache memory can be constructed with a compact non-rechargeable battery.

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