JPS55123739A - Memory content prefetch control system - Google Patents
Memory content prefetch control systemInfo
- Publication number
- JPS55123739A JPS55123739A JP3029079A JP3029079A JPS55123739A JP S55123739 A JPS55123739 A JP S55123739A JP 3029079 A JP3029079 A JP 3029079A JP 3029079 A JP3029079 A JP 3029079A JP S55123739 A JPS55123739 A JP S55123739A
- Authority
- JP
- Japan
- Prior art keywords
- unit
- memory
- perform
- data processing
- latch circuit
- 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
Abstract
PURPOSE: To make it possible to perform the data processing efficiently, by causing a latch circuit, etc., to perform the read access to a memory to prefetch memory contents.
CONSTITUTION: In the data processing unit equipped with a microprocessor which has no memory prefetch function, memory access control unit 3 is connected to CPU1 through common bus 2, and memories 5-1, 5-2... are accessed by this unit 3. Here, unit 3 utilizes the idle time, when CPU1 performs the memory access to perform the read access to memories 5-1, 5-2... dependently upon address latch circuit 7, address comparing circuit 8, read data latch circuit 10, etc., which are provided in unit 3, thus prefetching memory contents. By this operation, needless frefetch generated for branch instructions is stopped, and the response of unit 3 is made rapid to release occupation of bus 2, thereby performing the data processing efficiently.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3029079A JPS55123739A (en) | 1979-03-15 | 1979-03-15 | Memory content prefetch control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3029079A JPS55123739A (en) | 1979-03-15 | 1979-03-15 | Memory content prefetch control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55123739A true JPS55123739A (en) | 1980-09-24 |
Family
ID=12299585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3029079A Pending JPS55123739A (en) | 1979-03-15 | 1979-03-15 | Memory content prefetch control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55123739A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58205258A (en) * | 1982-05-24 | 1983-11-30 | Matsushita Electric Ind Co Ltd | Data processor |
JPS5957348A (en) * | 1982-08-26 | 1984-04-02 | Fujitsu Ltd | System for inhibiting extraction of instruction and cancellig inhibition in information processor |
JPS59111545A (en) * | 1982-12-17 | 1984-06-27 | Fuji Electric Co Ltd | Information processor |
JPS59202867A (en) * | 1983-05-04 | 1984-11-16 | Sanyo Electric Co Ltd | Printing control apparatus |
JPS59202870A (en) * | 1983-05-04 | 1984-11-16 | Sanyo Electric Co Ltd | Printing controller |
JPS59202871A (en) * | 1983-05-04 | 1984-11-16 | Sanyo Electric Co Ltd | Printing controller |
JPS59202868A (en) * | 1983-05-04 | 1984-11-16 | Sanyo Electric Co Ltd | Printing control apparatus |
JPS61211744A (en) * | 1985-03-18 | 1986-09-19 | Nec Corp | Instruction prefetch control circuit |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5039427A (en) * | 1973-08-10 | 1975-04-11 | ||
JPS5136037A (en) * | 1974-09-21 | 1976-03-26 | Hitachi Ltd | MEMORISEIGYO HOSHIKI |
JPS5140824A (en) * | 1974-10-04 | 1976-04-06 | Hitachi Ltd |
-
1979
- 1979-03-15 JP JP3029079A patent/JPS55123739A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5039427A (en) * | 1973-08-10 | 1975-04-11 | ||
JPS5136037A (en) * | 1974-09-21 | 1976-03-26 | Hitachi Ltd | MEMORISEIGYO HOSHIKI |
JPS5140824A (en) * | 1974-10-04 | 1976-04-06 | Hitachi Ltd |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58205258A (en) * | 1982-05-24 | 1983-11-30 | Matsushita Electric Ind Co Ltd | Data processor |
JPS5957348A (en) * | 1982-08-26 | 1984-04-02 | Fujitsu Ltd | System for inhibiting extraction of instruction and cancellig inhibition in information processor |
JPS6235694B2 (en) * | 1982-08-26 | 1987-08-03 | Fujitsu Ltd | |
JPS59111545A (en) * | 1982-12-17 | 1984-06-27 | Fuji Electric Co Ltd | Information processor |
JPH059817B2 (en) * | 1982-12-17 | 1993-02-08 | Fuji Denki Kk | |
JPS59202868A (en) * | 1983-05-04 | 1984-11-16 | Sanyo Electric Co Ltd | Printing control apparatus |
JPS59202871A (en) * | 1983-05-04 | 1984-11-16 | Sanyo Electric Co Ltd | Printing controller |
JPS59202870A (en) * | 1983-05-04 | 1984-11-16 | Sanyo Electric Co Ltd | Printing controller |
JPH021676B2 (en) * | 1983-05-04 | 1990-01-12 | Sanyo Electric Co | |
JPH023714B2 (en) * | 1983-05-04 | 1990-01-24 | Sanyo Electric Co | |
JPH0356189B2 (en) * | 1983-05-04 | 1991-08-27 | ||
JPS59202867A (en) * | 1983-05-04 | 1984-11-16 | Sanyo Electric Co Ltd | Printing control apparatus |
JPS61211744A (en) * | 1985-03-18 | 1986-09-19 | Nec Corp | Instruction prefetch control circuit |
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