JPS6459524A - System for selecting input/output device - Google Patents

System for selecting input/output device

Info

Publication number
JPS6459524A
JPS6459524A JP62216975A JP21697587A JPS6459524A JP S6459524 A JPS6459524 A JP S6459524A JP 62216975 A JP62216975 A JP 62216975A JP 21697587 A JP21697587 A JP 21697587A JP S6459524 A JPS6459524 A JP S6459524A
Authority
JP
Japan
Prior art keywords
signal
controller
output device
input
outputted
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
JP62216975A
Other languages
Japanese (ja)
Inventor
Shinsuke Satou
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP62216975A priority Critical patent/JPS6459524A/en
Publication of JPS6459524A publication Critical patent/JPS6459524A/en
Pending legal-status Critical Current

Links

Landscapes

  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE:To perform the selection of an input/output device by a few number of signal lines, by fetching a first signal and a second signal with a cycle smaller than that of the first signal outputted by a controller, and switching connection to the control device of the input/output device sequentially corresponding to the change of the second signal. CONSTITUTION:The titled system is the one where the first signal and the second signal with the cycle smaller than that of the first signal outputted by the controller 10 are fetched, and the connection to the controller 10 of the input/output device is switched sequentially corresponding to the change of the second signal. In other words, since the connection to the controller 10 is performed by combining a reset signal (first signal) and a select signal (second signal) outputted by the controller 10 and switching the keyboards 30, 32, 34, 36, and 38 of plural input/output devices sequentially, it is possible to reduce the number of signal lines to select the keyboards 30, 32, 34, 36, and 38 only to two lines.
JP62216975A 1987-08-31 1987-08-31 System for selecting input/output device Pending JPS6459524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62216975A JPS6459524A (en) 1987-08-31 1987-08-31 System for selecting input/output device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62216975A JPS6459524A (en) 1987-08-31 1987-08-31 System for selecting input/output device

Publications (1)

Publication Number Publication Date
JPS6459524A true JPS6459524A (en) 1989-03-07

Family

ID=16696850

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62216975A Pending JPS6459524A (en) 1987-08-31 1987-08-31 System for selecting input/output device

Country Status (1)

Country Link
JP (1) JPS6459524A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5278958A (en) * 1988-01-27 1994-01-11 Kabushiki Kaisha Toshiba Method and apparatus for selecting a keyboard on a computer system
US5341316A (en) * 1989-09-08 1994-08-23 Kabushiki Kaisha Toshiba Personal computer system allowing selective use of built-in and external keyboards by means of selector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5278958A (en) * 1988-01-27 1994-01-11 Kabushiki Kaisha Toshiba Method and apparatus for selecting a keyboard on a computer system
US5341316A (en) * 1989-09-08 1994-08-23 Kabushiki Kaisha Toshiba Personal computer system allowing selective use of built-in and external keyboards by means of selector

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