GB1233290A - - Google Patents
Info
- Publication number
- GB1233290A GB1233290A GB1233290DA GB1233290A GB 1233290 A GB1233290 A GB 1233290A GB 1233290D A GB1233290D A GB 1233290DA GB 1233290 A GB1233290 A GB 1233290A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bit lines
- associative
- logical
- cell
- output terminals
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C15/00—Digital stores in which information comprising one or more characteristic parts is written into the store and in which information is read-out by searching for one or more of these characteristic parts, i.e. associative or content-addressed stores
- G11C15/04—Digital stores in which information comprising one or more characteristic parts is written into the store and in which information is read-out by searching for one or more of these characteristic parts, i.e. associative or content-addressed stores using semiconductor elements
Abstract
1,233,290. Associative stores; data processing. INTERNATIONAL BUSINESS MACHINES CORP. 2 Oct., 1969, No. 48401/69. Headings G4A and G4C. An electronic digital data store comprises a set of information storage cells, the information stored in each cell being represented by the combination of electrical markings on first and second output terminals of the cell, and first and second bit lines connected respectively to the first and second output terminals of the cells of the set, wherein the first and second bit lines are connected as respective inputs to logical connective circuitry which derives a logical function of the signals on the bit lines with each other. The store is associative. The two output terminals of each cell indicate 10, 01, 00 or 11, the last two of these four possible states giving an associative match for any input and an associative mismatch for any input respectively. The bit lines effectively OR the signals from the terminals connected to them when a plurality of words are read out on to them together. Various forms of logical connective circuitry are disclosed for each pair of bit lines permitting fixed or variable logical combinations. Binary addition, incrementing, decrementing and twos-complementing by tablelook-up is possible with reduced table sizes and/or less cycles in general, using the invention. Logical functions of stored operands can be evaluated by read-out. Output from a selected column (but line pair) can be inhibited.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4840169 | 1969-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1233290A true GB1233290A (en) | 1971-05-26 |
Family
ID=10448481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1233290D Expired GB1233290A (en) | 1969-10-02 | 1969-10-02 |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS4819492B1 (en) |
| CH (1) | CH523548A (en) |
| DE (1) | DE2047220C3 (en) |
| FR (1) | FR2064094B1 (en) |
| GB (1) | GB1233290A (en) |
| NL (1) | NL7013899A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0263275A2 (en) * | 1986-09-29 | 1988-04-13 | Pansophic Systems, Incorporated | A look-up table |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1372926A (en) * | 1972-01-17 | 1974-11-06 | Ibm | Associative store |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL291619A (en) * | 1962-05-01 | 1900-01-01 | ||
| GB1162109A (en) * | 1966-12-22 | 1969-08-20 | Ibm | Semi Conductor Data and Storage Devices and Data Stores Employing Such Devices |
-
1969
- 1969-10-02 GB GB1233290D patent/GB1233290A/en not_active Expired
-
1970
- 1970-09-15 CH CH1371270A patent/CH523548A/en not_active IP Right Cessation
- 1970-09-17 FR FR7034359A patent/FR2064094B1/fr not_active Expired
- 1970-09-21 NL NL7013899A patent/NL7013899A/xx not_active Application Discontinuation
- 1970-09-25 DE DE19702047220 patent/DE2047220C3/en not_active Expired
- 1970-09-30 JP JP45085175A patent/JPS4819492B1/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0263275A2 (en) * | 1986-09-29 | 1988-04-13 | Pansophic Systems, Incorporated | A look-up table |
| EP0263275A3 (en) * | 1986-09-29 | 1990-01-10 | Pansophic Systems, Incorporated | A look-up table |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2047220A1 (en) | 1971-04-29 |
| CH523548A (en) | 1972-05-31 |
| NL7013899A (en) | 1971-04-06 |
| JPS4819492B1 (en) | 1973-06-14 |
| FR2064094B1 (en) | 1975-01-10 |
| DE2047220C3 (en) | 1980-02-07 |
| DE2047220B2 (en) | 1979-05-17 |
| FR2064094A1 (en) | 1971-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |