Word-organized, content-addressable memory

Details Word-organized, content-addressable memory Word-organized, content-addressable memory

G - Physics

11

C

354/244

G11C 15/04 (2006.01)

Patent

CA 1118906

1 PHN 8989 ABSTRACT: A word-organized, content-addressable memory comprises per word location a validity indicator, hav- ing a position "valid" and a position "invalid", and a correspondence indicator. The following functions can be performed: a) associative searching and reading of the content of a word for which correspondence occurs (R); b) reading the next word in sequence of words for which correspondence occurs (SR); c) loading a mask word in the mask register (LM); d) selective invalidating of the content of one or more predetermined word locations (CPM); e) writing in an empty word location, i.e. a location not having a valid data content (WFP); f) writing data in a number of selective bit positions of one or more words for which correspondence occurs (WP). There is also provided a mask register whose data activate the comparisons as well as the outputting of data for which no comparison has taken place. As a result of such an organization, a very versatile use is realised for a comparatively inexpens- ive memory. In a memory of this kind, constructed as an integrated circuit, moreover, only a small number of connections are required per number of bit positions.

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