JPS54124644A - Data transfer system - Google Patents
Data transfer systemInfo
- Publication number
- JPS54124644A JPS54124644A JP3106378A JP3106378A JPS54124644A JP S54124644 A JPS54124644 A JP S54124644A JP 3106378 A JP3106378 A JP 3106378A JP 3106378 A JP3106378 A JP 3106378A JP S54124644 A JPS54124644 A JP S54124644A
- Authority
- JP
- Japan
- Prior art keywords
- processing unit
- memory
- data
- controller
- program
- 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 reduce the number of program start times to improve a data transfer efficiency by performing alternately two-way data transfers between a processing unit and an I/O controller in one WORD unit by a one-time program instruction.
CONSTITUTION: At a program start time, the start address of a memory, which data should be transferred to, in a processing unit and the number of transfer words are preset in READ-direction and WRITE-direction registers 14, 15, 16 and 17 provided in I/O controller 2. While designating memory addresses by I/O controller 2, READ and WRITE operations are repeated alternately by direct memory access start instructions. Then, operations for writing data in receiving buffer register 13 to the memory of the processing unit and reading data from the memory in the processing unit into transmission buffer register 12 are performed alternately in the same program mode.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3106378A JPS54124644A (en) | 1978-03-20 | 1978-03-20 | Data transfer system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3106378A JPS54124644A (en) | 1978-03-20 | 1978-03-20 | Data transfer system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54124644A true JPS54124644A (en) | 1979-09-27 |
Family
ID=12321001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3106378A Pending JPS54124644A (en) | 1978-03-20 | 1978-03-20 | Data transfer system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54124644A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63143603A (en) * | 1986-12-05 | 1988-06-15 | Omron Tateisi Electronics Co | Programmable controller |
-
1978
- 1978-03-20 JP JP3106378A patent/JPS54124644A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63143603A (en) * | 1986-12-05 | 1988-06-15 | Omron Tateisi Electronics Co | Programmable controller |
JP2508038B2 (en) * | 1986-12-05 | 1996-06-19 | オムロン株式会社 | Programmable controller |
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