Memory checking method

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371 51, G06F 1110

Patent

active

043685323

ABSTRACT:
A method of checking a memory in a computer system having memory for storing at least one logical block composed of a plurality of words, and a processor for retrieving data from the memory to perform a memory check wherein the method includes inserting an operational control word into the logical block in advance, sequentially subjecting each word in the logical block to a prescribed operation, such as an exclusive-OR operation applied to corresponding ones of the bits in each word, and then determining whether or not the result of the operation is the same as a predetermined value. The operational control word, before being inserted into the logical block, is determined in such a manner that the result of the operation will be equivalent to a predetermined value, such as all "0"s.

REFERENCES:
patent: 3887901 (1975-06-01), Moore
patent: 4016409 (1977-04-01), Kim
patent: 4038537 (1977-07-01), Cassarino, Jr. et al.
patent: 4196770 (1980-04-01), Benton et al.

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