JPS5542341A - Data transfer system - Google Patents
Data transfer systemInfo
- Publication number
- JPS5542341A JPS5542341A JP11491978A JP11491978A JPS5542341A JP S5542341 A JPS5542341 A JP S5542341A JP 11491978 A JP11491978 A JP 11491978A JP 11491978 A JP11491978 A JP 11491978A JP S5542341 A JPS5542341 A JP S5542341A
- Authority
- JP
- Japan
- Prior art keywords
- page
- state
- transfer
- mode
- control signal
- 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
- Memory System Of A Hierarchy Structure (AREA)
Abstract
PURPOSE: To make it possible to switch freely the data transfer mode of a center processor by discriminating between a page unit and page disregard mode from the state of the control signal on a bus line.
CONSTITUTION: When an instruction is transferred by a control signal in the extended mode of a bus line connecting central processor CPU to input-output device I/O, this control signal is referred to and the transfer mode is decided on from its state. Namely, a decision that the extended mode is OFF, page unit is ON and the page is disregarded, for example, is made. As the result of this decision, page-by- page transfer is carried out in the OFF state and end at the boundary of pages. In case of the ON state, the transfer is implemented regardless of boundaries of pages. In this way, the transfer modes can freely be changed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11491978A JPS5542341A (en) | 1978-09-19 | 1978-09-19 | Data transfer system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11491978A JPS5542341A (en) | 1978-09-19 | 1978-09-19 | Data transfer system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5542341A true JPS5542341A (en) | 1980-03-25 |
Family
ID=14649904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11491978A Pending JPS5542341A (en) | 1978-09-19 | 1978-09-19 | Data transfer system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5542341A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4319752A1 (en) * | 1992-06-15 | 1993-12-16 | Matsushita Electric Works Ltd | Electromagnetic relay for ON=OFF switching of lighting device - uses two pairs of parallel contacts respectively exhibiting high welding resistance and reduced transfer resistance and operated in sequence. |
-
1978
- 1978-09-19 JP JP11491978A patent/JPS5542341A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4319752A1 (en) * | 1992-06-15 | 1993-12-16 | Matsushita Electric Works Ltd | Electromagnetic relay for ON=OFF switching of lighting device - uses two pairs of parallel contacts respectively exhibiting high welding resistance and reduced transfer resistance and operated in sequence. |
US5359305A (en) * | 1992-06-15 | 1994-10-25 | Matsushita Electric Works, Ltd. | Electromagnetic relay |
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