JPS5597655A - Memory access system - Google Patents
Memory access systemInfo
- Publication number
- JPS5597655A JPS5597655A JP433279A JP433279A JPS5597655A JP S5597655 A JPS5597655 A JP S5597655A JP 433279 A JP433279 A JP 433279A JP 433279 A JP433279 A JP 433279A JP S5597655 A JPS5597655 A JP S5597655A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- request
- control part
- information
- access
- 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 secure the memory access time equivalent to the cycle time of the memory by providing more than two sets of information buffers for writing and reading to the memory plus more than two sets of reading and writing request control parts to the CPU respectively.
CONSTITUTION: When the request is generated within CPU2 to memory 1, request control part 4 is set to send the request to the memory. Memory 1 memorizes the request given from CPU2 into information buffer 8 and then starts the access of the memory unit through memory unit access information selection control part 10. In case the request to the next memory is occurred in CPU2 during that time, request control part 5 is set. And request selection control part 6 switches the request control to memory 1 to part 5. And memory 1 memorizes the request information into information buffer 9, and at the same time memory busy display control part 13 is set. On the other hand, when the access is over via buffer 8, the data is set to data buffer 12 to secure the request enable state.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP433279A JPS5597655A (en) | 1979-01-18 | 1979-01-18 | Memory access system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP433279A JPS5597655A (en) | 1979-01-18 | 1979-01-18 | Memory access system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5597655A true JPS5597655A (en) | 1980-07-25 |
Family
ID=11581487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP433279A Pending JPS5597655A (en) | 1979-01-18 | 1979-01-18 | Memory access system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5597655A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5812185A (en) * | 1981-07-15 | 1983-01-24 | Nec Corp | Semiconductor storage device |
-
1979
- 1979-01-18 JP JP433279A patent/JPS5597655A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5812185A (en) * | 1981-07-15 | 1983-01-24 | Nec Corp | Semiconductor storage device |
JPS628870B2 (en) * | 1981-07-15 | 1987-02-25 | Nippon Electric Co |
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