Power failure memory support system

Details Power failure memory support system Power failure memory support system

1980-03-28

1982-04-06

Fears, Terrell W.

Static information storage and retrieval

Powering

Data preservation

365227, 371 10, G11C 1140

Patent

active

043239870

ABSTRACT:
Apparatus for retrieving data from a volatile memory in a data processing system in the event of a power supply failure. Means are provided for transferring the data to an external device. Power sensing means detects a power failure; an independent power supply is provided for maintaining the data in the memory when the power sensing means detects a power failure; timing means detects a lapse of time from the power failure; and output means transfers the data from the volatile memory to the external device when the timing means indicates that a predetermined time interval has lapsed.

REFERENCES:
patent: 3810116 (1974-05-01), Prohofsky
patent: 3859638 (1975-01-01), Hume
IBM Tech. Dis. Bul., vol. 18, No. 12, May 1976, "Power Out Warning Interrupt Circuit", by R. D. DeMong, pp. 4147-4149.

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