JPS6425258A - Memory access circuit - Google Patents
Memory access circuitInfo
- Publication number
- JPS6425258A JPS6425258A JP17988887A JP17988887A JPS6425258A JP S6425258 A JPS6425258 A JP S6425258A JP 17988887 A JP17988887 A JP 17988887A JP 17988887 A JP17988887 A JP 17988887A JP S6425258 A JPS6425258 A JP S6425258A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- data
- access circuit
- writing
- written
- 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
Abstract
PURPOSE:To quickly develop data by having flags to correspond to each address of a memory, executing the read-out action of a memory and a logic operation with writing data when the flag is ON and executing the writing of data when the flag is OFF. CONSTITUTION:A memory access circuit 102 is interposed between a CPU 100 and a memory 27 and executes the input/output control of data to the memory 27. When the memory access circuit 102 writes data to the memory 27 and the data is written to the address of the memory 27 already made accessed, a logic operation with data stored in the memory 27 and the writing data to the memory 27 is executed to be stored into the memory 27, and when the data is written to the address of the memory 27 not to be made access yet, the writing data is written into the memory 27 as it is.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62179888A JP2523662B2 (en) | 1987-07-21 | 1987-07-21 | Memory access circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62179888A JP2523662B2 (en) | 1987-07-21 | 1987-07-21 | Memory access circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6425258A true JPS6425258A (en) | 1989-01-27 |
JP2523662B2 JP2523662B2 (en) | 1996-08-14 |
Family
ID=16073651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62179888A Expired - Fee Related JP2523662B2 (en) | 1987-07-21 | 1987-07-21 | Memory access circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2523662B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11708380B2 (en) | 2020-10-22 | 2023-07-25 | Entegris, Inc. | Selective alkylation of cyclopentadiene |
-
1987
- 1987-07-21 JP JP62179888A patent/JP2523662B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11708380B2 (en) | 2020-10-22 | 2023-07-25 | Entegris, Inc. | Selective alkylation of cyclopentadiene |
Also Published As
Publication number | Publication date |
---|---|
JP2523662B2 (en) | 1996-08-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |