JPS5682960A - Bus control system - Google Patents
Bus control systemInfo
- Publication number
- JPS5682960A JPS5682960A JP15948679A JP15948679A JPS5682960A JP S5682960 A JPS5682960 A JP S5682960A JP 15948679 A JP15948679 A JP 15948679A JP 15948679 A JP15948679 A JP 15948679A JP S5682960 A JPS5682960 A JP S5682960A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- bus
- data
- external
- transmitting
- 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 enable to decrease the number of external connection pins greatly by inputting microinstructions from a control memory part and transmitting and receiving main memory information and input-output information via the same bus.
CONSTITUTION: Arithmetic controller 101, made into one chip of a very high scale integrated semiconductor device, is controlled by external control memory part 102 stored with a microprogram. Then, common bus 103 is provided as a common communication path between controller 101 and an external device and output data of control part 102, memory addresses and memory data of the main memory and I/O data arrive in time-division mode. The number of external connection pins can, therefore, be decreased greatly by transmitting and receiving those signals via bus 103.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15948679A JPS5682960A (en) | 1979-12-08 | 1979-12-08 | Bus control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15948679A JPS5682960A (en) | 1979-12-08 | 1979-12-08 | Bus control system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5682960A true JPS5682960A (en) | 1981-07-07 |
JPH0542025B2 JPH0542025B2 (en) | 1993-06-25 |
Family
ID=15694815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15948679A Granted JPS5682960A (en) | 1979-12-08 | 1979-12-08 | Bus control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5682960A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS513741A (en) * | 1974-06-26 | 1976-01-13 | Ibm | |
JPS52102643A (en) * | 1976-02-25 | 1977-08-29 | Hitachi Ltd | Data processor |
JPS5393741A (en) * | 1977-01-26 | 1978-08-17 | Hokushin Electric Works | Duplex data transfer system |
JPS5437438A (en) * | 1977-08-27 | 1979-03-19 | Nec Corp | Bus control system |
-
1979
- 1979-12-08 JP JP15948679A patent/JPS5682960A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS513741A (en) * | 1974-06-26 | 1976-01-13 | Ibm | |
JPS52102643A (en) * | 1976-02-25 | 1977-08-29 | Hitachi Ltd | Data processor |
JPS5393741A (en) * | 1977-01-26 | 1978-08-17 | Hokushin Electric Works | Duplex data transfer system |
JPS5437438A (en) * | 1977-08-27 | 1979-03-19 | Nec Corp | Bus control system |
Also Published As
Publication number | Publication date |
---|---|
JPH0542025B2 (en) | 1993-06-25 |
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