JPS54136237A - Memory unit access system - Google Patents
Memory unit access systemInfo
- Publication number
- JPS54136237A JPS54136237A JP4387378A JP4387378A JPS54136237A JP S54136237 A JPS54136237 A JP S54136237A JP 4387378 A JP4387378 A JP 4387378A JP 4387378 A JP4387378 A JP 4387378A JP S54136237 A JPS54136237 A JP S54136237A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- unit
- memory
- memory unit
- timing signal
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
- G11C7/22—Read-write [R-W] timing or clocking circuits; Read-write [R-W] control signal generators or management
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
Landscapes
- Memory System (AREA)
Abstract
PURPOSE:To make adjustable the delivery period of the end timing signal, by controlling the system so that the intermediate timing signal can be longer for the element having longer access time, in the memory unit in mixture of memory elements in access time. CONSTITUTION:In accessing the high speed memory unit 3-A, when the memory unit usage request signal MRQ is fed from the operation unit 1, the start timing signal M1 is fed to the unit 1 with FF5. The sectioning of the memory units 3-A and 3-B is made with the address data, the intermediate timing signal M2 is produced with FF6 at the next cycle, the end timing signal M3 is produced with FF7 at the third cycle, and the unit 1 fetches the readout data. In accessing the low speed memory unit 3-B, FF12 is set with the signal MCYB under the usage of the memory unit B, signal M2 is stored, signal M3 is produced in 4 cycle, and the unit 1 fetches the readout data. The signal M2 is extended when the memory access request and the memory refresh request are in competition, until the refresh cycle is finished.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4387378A JPS54136237A (en) | 1978-04-14 | 1978-04-14 | Memory unit access system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4387378A JPS54136237A (en) | 1978-04-14 | 1978-04-14 | Memory unit access system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54136237A true JPS54136237A (en) | 1979-10-23 |
JPS6214864B2 JPS6214864B2 (en) | 1987-04-04 |
Family
ID=12675807
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4387378A Granted JPS54136237A (en) | 1978-04-14 | 1978-04-14 | Memory unit access system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54136237A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62209606A (en) * | 1986-02-17 | 1987-09-14 | Fujitsu Ltd | Timing production system for main storage device |
JPH04230508A (en) * | 1990-10-29 | 1992-08-19 | Internatl Business Mach Corp <Ibm> | Apparatus and method for controlling electric power with page arrangment control |
-
1978
- 1978-04-14 JP JP4387378A patent/JPS54136237A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62209606A (en) * | 1986-02-17 | 1987-09-14 | Fujitsu Ltd | Timing production system for main storage device |
JPH04230508A (en) * | 1990-10-29 | 1992-08-19 | Internatl Business Mach Corp <Ibm> | Apparatus and method for controlling electric power with page arrangment control |
Also Published As
Publication number | Publication date |
---|---|
JPS6214864B2 (en) | 1987-04-04 |
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