JPS5561866A - Memory designation system - Google Patents
Memory designation systemInfo
- Publication number
- JPS5561866A JPS5561866A JP13526378A JP13526378A JPS5561866A JP S5561866 A JPS5561866 A JP S5561866A JP 13526378 A JP13526378 A JP 13526378A JP 13526378 A JP13526378 A JP 13526378A JP S5561866 A JPS5561866 A JP S5561866A
- Authority
- JP
- Japan
- Prior art keywords
- processor
- bit
- memories
- memory
- common
- 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 perform the memory designation efficiently, by individual selecting the common memory split when the memory access is made by the processor in 8-bit, and by simultaneously selecting all or a plurality of common memories in case of the processor in 16-bit.
CONSTITUTION: When the common memories 6a and 6b are accessed by using the processor 2 in 16-bit and the processor 1 in 8-bit, the processors 1, 2 are controlled with the processor control unit 3. When accessing is made to the common memories 6a and 6b by using the processor 1 in 8-bit, either one of the memories 6a and 6b is selected with the output of either one of the AND circuits 10 and 11 with the address data of the processor 1. Further, in case of memory access with the processor 2 in 16-bit, all the memories 6a and 6b or a plurality of them are simultaneously accessed. Thus, memory designation is made efficiently without lowering the processing speed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13526378A JPS5561866A (en) | 1978-11-02 | 1978-11-02 | Memory designation system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13526378A JPS5561866A (en) | 1978-11-02 | 1978-11-02 | Memory designation system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5561866A true JPS5561866A (en) | 1980-05-09 |
JPS6113628B2 JPS6113628B2 (en) | 1986-04-14 |
Family
ID=15147607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13526378A Granted JPS5561866A (en) | 1978-11-02 | 1978-11-02 | Memory designation system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5561866A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58109960A (en) * | 1981-12-22 | 1983-06-30 | インタ−シル・インコ−ポレ−テツド | Data processing system |
JPS63113745A (en) * | 1986-10-31 | 1988-05-18 | Sony Tektronix Corp | Memory controller |
JPS6478320A (en) * | 1987-09-19 | 1989-03-23 | Fujitsu Ltd | Data processing system |
-
1978
- 1978-11-02 JP JP13526378A patent/JPS5561866A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58109960A (en) * | 1981-12-22 | 1983-06-30 | インタ−シル・インコ−ポレ−テツド | Data processing system |
JPS6246025B2 (en) * | 1981-12-22 | 1987-09-30 | Intersil Inc | |
JPS63113745A (en) * | 1986-10-31 | 1988-05-18 | Sony Tektronix Corp | Memory controller |
JPS6478320A (en) * | 1987-09-19 | 1989-03-23 | Fujitsu Ltd | Data processing system |
Also Published As
Publication number | Publication date |
---|---|
JPS6113628B2 (en) | 1986-04-14 |
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