JPS5525173A - Asynchronous processing system for external unit - Google Patents
Asynchronous processing system for external unitInfo
- Publication number
- JPS5525173A JPS5525173A JP9886878A JP9886878A JPS5525173A JP S5525173 A JPS5525173 A JP S5525173A JP 9886878 A JP9886878 A JP 9886878A JP 9886878 A JP9886878 A JP 9886878A JP S5525173 A JPS5525173 A JP S5525173A
- Authority
- JP
- Japan
- Prior art keywords
- restart
- cpu20
- operation end
- unit
- output
- 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
Landscapes
- Information Transfer Systems (AREA)
Abstract
PURPOSE: To increase the processing speed of CPU and also to reduce instruction words in number by making it possible to restart access to an external unit by either indication at the time of the reception of an operation end information signal or operation end signal.
CONSTITUTION: Memory unit 10 is connected to CPU20 via an asynchronous interface and when unit 10 receives memory access request 31 from CPU20, timing circuit 11 of unit 10 sends back operation end information signal 32 and operation end signal 33 to CPU20 after fixed time. on receiving information signal 32 and end signal 33 by receiver circuits 22 and 23, CPU20 supplies its output to restart format change-over circuit 24, the output of which is inputted to microinstruction execution/ break control circuit 25. Then, control circuit 25 interrupts the execution of the next microinstruction of access request 31 and when the output restart format change-over circuit 24 is energized, the interruption is released, thereby restart the process.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53098868A JPS5843770B2 (en) | 1978-08-14 | 1978-08-14 | Asynchronous processing method for external devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53098868A JPS5843770B2 (en) | 1978-08-14 | 1978-08-14 | Asynchronous processing method for external devices |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5525173A true JPS5525173A (en) | 1980-02-22 |
JPS5843770B2 JPS5843770B2 (en) | 1983-09-29 |
Family
ID=14231159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53098868A Expired JPS5843770B2 (en) | 1978-08-14 | 1978-08-14 | Asynchronous processing method for external devices |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5843770B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60121262U (en) * | 1983-10-08 | 1985-08-15 | 株式会社ユアサコーポレーション | sealed lead acid battery |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4974451A (en) * | 1972-11-17 | 1974-07-18 | ||
JPS5210039A (en) * | 1975-07-14 | 1977-01-26 | Seikosha Co Ltd | Supplemental controller of data processer |
JPS5236438A (en) * | 1975-09-17 | 1977-03-19 | Sanyo Electric Co Ltd | Channel device |
JPS5255450A (en) * | 1975-10-31 | 1977-05-06 | Toshiba Corp | Control system of processor |
-
1978
- 1978-08-14 JP JP53098868A patent/JPS5843770B2/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4974451A (en) * | 1972-11-17 | 1974-07-18 | ||
JPS5210039A (en) * | 1975-07-14 | 1977-01-26 | Seikosha Co Ltd | Supplemental controller of data processer |
JPS5236438A (en) * | 1975-09-17 | 1977-03-19 | Sanyo Electric Co Ltd | Channel device |
JPS5255450A (en) * | 1975-10-31 | 1977-05-06 | Toshiba Corp | Control system of processor |
Also Published As
Publication number | Publication date |
---|---|
JPS5843770B2 (en) | 1983-09-29 |
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