JPS5572229A - Information processing system - Google Patents
Information processing systemInfo
- Publication number
- JPS5572229A JPS5572229A JP14515378A JP14515378A JPS5572229A JP S5572229 A JPS5572229 A JP S5572229A JP 14515378 A JP14515378 A JP 14515378A JP 14515378 A JP14515378 A JP 14515378A JP S5572229 A JPS5572229 A JP S5572229A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- cpu
- memory
- circuit
- 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.)
- Pending
Links
Abstract
PURPOSE: To enable apparently each CPU system to operate nearly in independent mode, by attaining access to a common-use device through hardware by using a simply-constituted circuit.
CONSTITUTION: Common-use memory M is provided connecting to 1st and 2nd CPUs in common, X and Y addresses from which are inputted to X and Y decoders 1 and 2, whose outputs are supplied to exclusive acceptance circuit 3 to select either CPU, and addresses are led to timing control circuit 4. At the same time, an acceptance disability signal disabling an output signal from the other CPU is applied to circuit 4 and memory control signal XCONT or YCONT is accepted from selected CPU to supply memory M wih either one as control signal M-CONT in accordance with selective signal SELECT and control enable signal CONT-ENA, so that X or YDATA will be inputted to memory M by M-ADRS from multiplexer 5 through X and Y buffers.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14515378A JPS5572229A (en) | 1978-11-24 | 1978-11-24 | Information processing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14515378A JPS5572229A (en) | 1978-11-24 | 1978-11-24 | Information processing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5572229A true JPS5572229A (en) | 1980-05-30 |
Family
ID=15378639
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14515378A Pending JPS5572229A (en) | 1978-11-24 | 1978-11-24 | Information processing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5572229A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60262259A (en) * | 1984-06-08 | 1985-12-25 | Tokyo Electric Co Ltd | Access control system for shared memory using plural microprocessors |
-
1978
- 1978-11-24 JP JP14515378A patent/JPS5572229A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60262259A (en) * | 1984-06-08 | 1985-12-25 | Tokyo Electric Co Ltd | Access control system for shared memory using plural microprocessors |
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