JPS5542341A - Data transfer system - Google Patents

Data transfer system

Info

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
Application number
JP11491978A
Other languages
Japanese (ja)
Inventor
Ryoichi Sugano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11491978A priority Critical patent/JPS5542341A/en
Publication of JPS5542341A publication Critical patent/JPS5542341A/en
Pending legal-status Critical Current

Links

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  • 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
JP11491978A 1978-09-19 1978-09-19 Data transfer system Pending JPS5542341A (en)

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)

* Cited by examiner, † Cited by third party
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.

Cited By (2)

* Cited by examiner, † Cited by third party
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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