JPS5465431A - Screen control system for display unit - Google Patents

Screen control system for display unit

Info

Publication number
JPS5465431A
JPS5465431A JP13155877A JP13155877A JPS5465431A JP S5465431 A JPS5465431 A JP S5465431A JP 13155877 A JP13155877 A JP 13155877A JP 13155877 A JP13155877 A JP 13155877A JP S5465431 A JPS5465431 A JP S5465431A
Authority
JP
Japan
Prior art keywords
display
memory
screen
control information
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.)
Granted
Application number
JP13155877A
Other languages
Japanese (ja)
Other versions
JPS5852230B2 (en
Inventor
Yoshihiko Otsuka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13155877A priority Critical patent/JPS5852230B2/en
Publication of JPS5465431A publication Critical patent/JPS5465431A/en
Publication of JPS5852230B2 publication Critical patent/JPS5852230B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To ensure the scrawling function of the display screen or the screen switching function by securing a free control to the display state of the graphic pattern in order to enable the screen display for an optional area of the graphic code memory.
CONSTITUTION: The following unnits are provided: screen ememory 5 containing the control information and the control information flag concerning the character code and display; character generator 7 which generates the character pattern based on the character code given from memory 5; and control information register 9 which stores the control information read from memory 5. Furthermore, control register 14 which sets the control information at the area where the display information is outside the display area when part of memory 5 is displayed is added, along with selector circuit 15 and display control circuit 10. Then such constitution is secured that the contents of register 9 and 14 may be selected via circuit 15. Thus, the scrawling function of the display screen or the screen switching function is provided in order to obtain the display of an optional area in memory 5.
COPYRIGHT: (C)1979,JPO&Japio
JP13155877A 1977-11-04 1977-11-04 Display device screen control method Expired JPS5852230B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13155877A JPS5852230B2 (en) 1977-11-04 1977-11-04 Display device screen control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13155877A JPS5852230B2 (en) 1977-11-04 1977-11-04 Display device screen control method

Publications (2)

Publication Number Publication Date
JPS5465431A true JPS5465431A (en) 1979-05-26
JPS5852230B2 JPS5852230B2 (en) 1983-11-21

Family

ID=15060865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13155877A Expired JPS5852230B2 (en) 1977-11-04 1977-11-04 Display device screen control method

Country Status (1)

Country Link
JP (1) JPS5852230B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58107583A (en) * 1981-12-22 1983-06-27 沖電気工業株式会社 Display unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58107583A (en) * 1981-12-22 1983-06-27 沖電気工業株式会社 Display unit
JPH0120750B2 (en) * 1981-12-22 1989-04-18 Oki Electric Ind Co Ltd

Also Published As

Publication number Publication date
JPS5852230B2 (en) 1983-11-21

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