JPS5644180A - Information retrieval device - Google Patents
Information retrieval deviceInfo
- 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
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
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)
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)
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 |
-
1979
- 1979-09-17 JP JP11898479A patent/JPS5644180A/en active Pending
Patent Citations (3)
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)
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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