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JPS5534711A - Keyboard scanning system - Google Patents

Keyboard scanning system

Info

Publication number
JPS5534711A
JPS5534711A JP10665878A JP10665878A JPS5534711A JP S5534711 A JPS5534711 A JP S5534711A JP 10665878 A JP10665878 A JP 10665878A JP 10665878 A JP10665878 A JP 10665878A JP S5534711 A JPS5534711 A JP S5534711A
Authority
JP
Japan
Prior art keywords
keyboard
scanning
keyboard scanning
crt
control
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
JP10665878A
Other languages
Japanese (ja)
Inventor
Tsugio Kodera
Nobuyuki Tanaka
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10665878A priority Critical patent/JPS5534711A/en
Publication of JPS5534711A publication Critical patent/JPS5534711A/en
Pending legal-status Critical Current

Links

Landscapes

  • Input From Keyboards Or The Like (AREA)

Abstract

PURPOSE: To make it possible to use the same hardware for the control of keyboard scanning and the scanning control of CRT display commonly by confirming whether the interrupt from the keyboard is caused or not each time the CRT display face is scanned once.
CONSTITUTION: Micro processor 21 controls keyboard scanning for the purpose of performing easily and cheaply keyboard scanning of a CRT display. Address information read out from refresh memory 22 by the command of processor 21 is transferred to display controller 25 and has control information added. Then, character selection code 28 and line selection signal 27 which are the output of controller 25 are used to input these information to an X decoder and a Y decoder by buffer 29. A key position of keyboard 34 is accessed on a basis of combination of outputs of decoders. Then, keyboard scanning is performed simulatneously each time the display face of CRT 33 is scanned once.
COPYRIGHT: (C)1980,JPO&Japio
JP10665878A 1978-08-31 1978-08-31 Keyboard scanning system Pending JPS5534711A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10665878A JPS5534711A (en) 1978-08-31 1978-08-31 Keyboard scanning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10665878A JPS5534711A (en) 1978-08-31 1978-08-31 Keyboard scanning system

Publications (1)

Publication Number Publication Date
JPS5534711A true JPS5534711A (en) 1980-03-11

Family

ID=14439188

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10665878A Pending JPS5534711A (en) 1978-08-31 1978-08-31 Keyboard scanning system

Country Status (1)

Country Link
JP (1) JPS5534711A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60193824A (en) * 1984-03-06 1985-10-02 フエニツクス電子株式会社 Automatic labeller for price tag

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51135326A (en) * 1975-05-19 1976-11-24 Sharp Corp Key signal distinctional block

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51135326A (en) * 1975-05-19 1976-11-24 Sharp Corp Key signal distinctional block

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60193824A (en) * 1984-03-06 1985-10-02 フエニツクス電子株式会社 Automatic labeller for price tag
JPS6241934B2 (en) * 1984-03-06 1987-09-05 Fuenitsukusu Denshi Kk

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