JPS5650426A - Data transmission unit - Google Patents
Data transmission unitInfo
- Publication number
- JPS5650426A JPS5650426A JP12634679A JP12634679A JPS5650426A JP S5650426 A JPS5650426 A JP S5650426A JP 12634679 A JP12634679 A JP 12634679A JP 12634679 A JP12634679 A JP 12634679A JP S5650426 A JPS5650426 A JP S5650426A
- Authority
- JP
- Japan
- Prior art keywords
- interface
- memory
- arithmetic unit
- data
- buffer memory
- 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
Landscapes
- Information Transfer Systems (AREA)
- Small-Scale Networks (AREA)
Abstract
PURPOSE: To transmit a large quantity of data at a time, by providing a buffer memory in the peripheral device interface and by making it possible to use this buffer memory by the main arithmetic unit as well as the peripheral device interface.
CONSTITUTION: Main arithmetic unit 1 and peripheral device interface 2 are connected by control line 10, address bus 8, and data bus 9, and data is transmitted between arithmetic unit 1 and interface 2. This interface 2 is provided with private memory 42 and buffer memory 5, and switches 61 and 62 are switched to the device 32 side to make it possible to use memory 5 normally in interface 2 by central processing unit 32 of interface 2. In case that device 1 wants to occupy memory 5, the attention signal is transmitted to bus 8 from central process 31 of device 1 and is received by unit 32 of interface 2, and switches 61 and 62 are switched to transmit and receive the sense and request signals between device 32 and 31 through control line 10, thus making it possible to use memory 5.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12634679A JPS5650426A (en) | 1979-10-02 | 1979-10-02 | Data transmission unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12634679A JPS5650426A (en) | 1979-10-02 | 1979-10-02 | Data transmission unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5650426A true JPS5650426A (en) | 1981-05-07 |
Family
ID=14932883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12634679A Pending JPS5650426A (en) | 1979-10-02 | 1979-10-02 | Data transmission unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5650426A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60124139A (en) * | 1983-12-08 | 1985-07-03 | Fujitsu Ltd | Communication system of buffer memory |
-
1979
- 1979-10-02 JP JP12634679A patent/JPS5650426A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60124139A (en) * | 1983-12-08 | 1985-07-03 | Fujitsu Ltd | Communication system of buffer memory |
JPH0521376B2 (en) * | 1983-12-08 | 1993-03-24 | Fujitsu Ltd |
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