JPS5644180A - Information retrieval device - Google Patents

Information retrieval device

Info

Publication number
JPS5644180A
JPS5644180A JP11898479A JP11898479A JPS5644180A JP S5644180 A JPS5644180 A JP S5644180A JP 11898479 A JP11898479 A JP 11898479A JP 11898479 A JP11898479 A JP 11898479A JP S5644180 A JPS5644180 A JP S5644180A
Authority
JP
Japan
Prior art keywords
counter
read
information
memory
write memory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11898479A
Other languages
Japanese (ja)
Inventor
Hiroyuki Izumisawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11898479A priority Critical patent/JPS5644180A/en
Publication of JPS5644180A publication Critical patent/JPS5644180A/en
Pending legal-status Critical Current

Links

Landscapes

  • Memory System Of A Hierarchy Structure (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

PURPOSE: To reduce cost and to improve processing efficiency by storing the count value of an additional counter at a memory location, indicated by information to be retrieved, in a read/write memory instead of storing the retrieved information in an associative memory.
CONSTITUTION: Information retrieval device 20 consists of register 10 in which information 100 to be retrieved is held, read/write memory 11', counter 21, and comparing circuit 12'. Every time processing runs are changed, the value of counter 21 is updated sequentially, and consequently counter 21 overflows to return to the initial value. In this case, it is necessary to clear all words in read/write memory 11' and its memory contents are initialized. For example, all words in read/write memory 11' are cleared into zero and count value 202 of counter 21 in a new processing run is set to 1. Then, when the number of bits of counter 21 is denoted as M, this clearing is done once for 2M-1 processing runs, which results in great improvement in efficiency in comparison with clearing at every start of a processing run.
COPYRIGHT: (C)1981,JPO&Japio
JP11898479A 1979-09-17 1979-09-17 Information retrieval device Pending JPS5644180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11898479A JPS5644180A (en) 1979-09-17 1979-09-17 Information retrieval device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11898479A JPS5644180A (en) 1979-09-17 1979-09-17 Information retrieval device

Publications (1)

Publication Number Publication Date
JPS5644180A true JPS5644180A (en) 1981-04-23

Family

ID=14750124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11898479A Pending JPS5644180A (en) 1979-09-17 1979-09-17 Information retrieval device

Country Status (1)

Country Link
JP (1) JPS5644180A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59167891A (en) * 1983-03-14 1984-09-21 Nec Corp Buffer storage device
JPH05204755A (en) * 1992-01-23 1993-08-13 Nec Corp Memory circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52156518A (en) * 1976-06-21 1977-12-27 Ibm Address conversion controller
JPS5460528A (en) * 1977-10-24 1979-05-16 Hitachi Ltd Multiple virtual memory control equipment
JPS54111726A (en) * 1978-02-22 1979-09-01 Hitachi Ltd Control unit for multiplex virtual memory

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52156518A (en) * 1976-06-21 1977-12-27 Ibm Address conversion controller
JPS5460528A (en) * 1977-10-24 1979-05-16 Hitachi Ltd Multiple virtual memory control equipment
JPS54111726A (en) * 1978-02-22 1979-09-01 Hitachi Ltd Control unit for multiplex virtual memory

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59167891A (en) * 1983-03-14 1984-09-21 Nec Corp Buffer storage device
JPH05204755A (en) * 1992-01-23 1993-08-13 Nec Corp Memory circuit

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