JPS54142039A - Microprogram control computer system - Google Patents
Microprogram control computer systemInfo
- Publication number
- JPS54142039A JPS54142039A JP4934078A JP4934078A JPS54142039A JP S54142039 A JPS54142039 A JP S54142039A JP 4934078 A JP4934078 A JP 4934078A JP 4934078 A JP4934078 A JP 4934078A JP S54142039 A JPS54142039 A JP S54142039A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- data transfer
- input
- cpu1
- cpu
- 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 realize the data transfer between the memory and the input/output bus bar without giving any effect to the operation of CPU by starting the data transfer between the memory and the input/output bus right afrer the start of the CPU's internal operation.
CONSTITUTION: For the moving body of the microcomputer, the internal operation time of CPU1 is longer (usually 5W50 times) than the data transfer time between memory 3 and CPU1. And the data transfer period between memory 3 and process input device 4 or process output device 5 is usually more than several tens of ms. Thus, the data transfer is started between memory 3 and input/output bus bar 12 right after the start of CPU1's internal operation and then finished until end of the internal action of the CPU. As a result, the competition is avoided between CPU3 and input/output controller 6B, thus realizing a direct connection between CPU1 and common bus 11. In other words, the CPU is never blocked for its operation by controller 6B with no existence of such elements as to delay the operation.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4934078A JPS54142039A (en) | 1978-04-27 | 1978-04-27 | Microprogram control computer system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4934078A JPS54142039A (en) | 1978-04-27 | 1978-04-27 | Microprogram control computer system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54142039A true JPS54142039A (en) | 1979-11-05 |
Family
ID=12828260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4934078A Pending JPS54142039A (en) | 1978-04-27 | 1978-04-27 | Microprogram control computer system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54142039A (en) |
-
1978
- 1978-04-27 JP JP4934078A patent/JPS54142039A/en active Pending
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