JPS55103663A - Micro computer composite unit - Google Patents
Micro computer composite unitInfo
- Publication number
- JPS55103663A JPS55103663A JP1077079A JP1077079A JPS55103663A JP S55103663 A JPS55103663 A JP S55103663A JP 1077079 A JP1077079 A JP 1077079A JP 1077079 A JP1077079 A JP 1077079A JP S55103663 A JPS55103663 A JP S55103663A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- micro computer
- outputted
- occupation
- decoder
- 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
- 239000002131 composite material Substances 0.000 title 1
Landscapes
- Multi Processors (AREA)
Abstract
PURPOSE: To make generation of an occupying instruction needless by utilizing the input of an address decoder as a memory request signal to occupy the memory provided commonly for plural micro computers.
CONSTITUTION: The address signal outputted when micro computer A requires occupation of memory M is inputted to decoder 11. When micro computer B does not occupy memory M at this time, a high level is outputted from inverter 14 of micro computer A, and a high level is outputted from AND gate 13, and gates 6W8 are opened to transmit and receive data between micro computer A and memory M. When an occupation request of memory M is issued from micro computer B at this time, a high-level queuing signal is issued from AND gate 12 to set central processing unit 1 of micro computer B to a queuing state. Thus, memory M can be occupied without an occupying instruction decoder and an occupation memory.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1077079A JPS55103663A (en) | 1979-01-31 | 1979-01-31 | Micro computer composite unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1077079A JPS55103663A (en) | 1979-01-31 | 1979-01-31 | Micro computer composite unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55103663A true JPS55103663A (en) | 1980-08-08 |
Family
ID=11759560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1077079A Pending JPS55103663A (en) | 1979-01-31 | 1979-01-31 | Micro computer composite unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55103663A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57178553A (en) * | 1981-04-27 | 1982-11-02 | Nec Corp | Multiprocessor system |
JPS58129565A (en) * | 1982-01-27 | 1983-08-02 | Nec Corp | Multi-system control device |
JPS58129567A (en) * | 1982-01-27 | 1983-08-02 | Nec Corp | Multi-system control device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5128731A (en) * | 1974-09-04 | 1976-03-11 | Tokyo Shibaura Electric Co | |
JPS5372532A (en) * | 1976-12-10 | 1978-06-28 | Hitachi Ltd | Access system for memory unit |
-
1979
- 1979-01-31 JP JP1077079A patent/JPS55103663A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5128731A (en) * | 1974-09-04 | 1976-03-11 | Tokyo Shibaura Electric Co | |
JPS5372532A (en) * | 1976-12-10 | 1978-06-28 | Hitachi Ltd | Access system for memory unit |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57178553A (en) * | 1981-04-27 | 1982-11-02 | Nec Corp | Multiprocessor system |
JPS58129565A (en) * | 1982-01-27 | 1983-08-02 | Nec Corp | Multi-system control device |
JPS58129567A (en) * | 1982-01-27 | 1983-08-02 | Nec Corp | Multi-system control device |
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