公开(公告)号：SE348580B

公开(公告)日：1972-09-04

申请号：SE40768

申请日：1968-01-12

Applicant: IBM

Inventor： LINDQUIST A ,  PRICER W ,  SEEBER R

IPC: G11C15/04 ,  G11C15/00

Abstract: 1,188,666. Associative stores; read-only stores. INTERNATIONAL BUSINESS MACHINES CORP. 15 Dec., 1967 [13 Jan., 1967], No. 57023/67. Headings G4A and G4C. Each word in a matrix associative memory has a unique address field. Each word in the transistorized memory has an erasable data field and a read-only address field, the address fields specifying the word locations and thus being all different. An input register has a data field and an address field, and by masking off one of them an associative search may be done on the data fields or the address fields, the matching word or words being read out to an output register. The output register also receives an indication of the number of matches (0, 1 or a plurality) provided by logic fed by the output of the address fields since in the case of more than one match at least one address bit position will be indicated as being both 1 and 0 (on separate lines) and in the case of no match any particular bit will not be indicated as being either.