JPS54128225A - Crt multiple screen display system - Google Patents

Crt multiple screen display system

Info

Publication number
JPS54128225A
JPS54128225A JP3554778A JP3554778A JPS54128225A JP S54128225 A JPS54128225 A JP S54128225A JP 3554778 A JP3554778 A JP 3554778A JP 3554778 A JP3554778 A JP 3554778A JP S54128225 A JPS54128225 A JP S54128225A
Authority
JP
Japan
Prior art keywords
crt
input
display
overlap
refresh
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
JP3554778A
Other languages
Japanese (ja)
Other versions
JPS6228473B2 (en
Inventor
Hiroshi Sakurai
Kazuo Watanabe
Yasuyo Ishikawa
Nobuo Hamamoto
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 JP3554778A priority Critical patent/JPS54128225A/en
Publication of JPS54128225A publication Critical patent/JPS54128225A/en
Publication of JPS6228473B2 publication Critical patent/JPS6228473B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the overlap screen through a simple constitution by switching the reading actions given through the refresh memory alternately and then densing them to the pattern generator circuit.
CONSTITUTION: The refresh address selector (AS) selects the address information at both the input and output sides. For the selection at the input side, the adress from the CRT display control circuit (CRTC) or MPU; while transmission of the address information is decided to refresh memory 3a or 3b for the selection at the output side. The reading for display of memory 3a and 3b is carried out in synchronization with the scanning from CRY to CRT. To secure the overlap display for the contents of 3a and 3b, switch circuit SW is provided to control AS and the input is applied by switching 3a and 3b alternately with overlap display order OV.
COPYRIGHT: (C)1979,JPO&Japio
JP3554778A 1978-03-29 1978-03-29 Crt multiple screen display system Granted JPS54128225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3554778A JPS54128225A (en) 1978-03-29 1978-03-29 Crt multiple screen display system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3554778A JPS54128225A (en) 1978-03-29 1978-03-29 Crt multiple screen display system

Publications (2)

Publication Number Publication Date
JPS54128225A true JPS54128225A (en) 1979-10-04
JPS6228473B2 JPS6228473B2 (en) 1987-06-20

Family

ID=12444744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3554778A Granted JPS54128225A (en) 1978-03-29 1978-03-29 Crt multiple screen display system

Country Status (1)

Country Link
JP (1) JPS54128225A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051891A (en) * 1983-08-31 1985-03-23 ソニー株式会社 Display unit
JPS60208794A (en) * 1984-04-02 1985-10-21 株式会社アドバンテスト Display unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0426524U (en) * 1990-06-26 1992-03-03

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS511375A (en) * 1974-06-24 1976-01-08 Sumitomo Chemical Co Maikurokapuseruno seizoho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS511375A (en) * 1974-06-24 1976-01-08 Sumitomo Chemical Co Maikurokapuseruno seizoho

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051891A (en) * 1983-08-31 1985-03-23 ソニー株式会社 Display unit
JPH0568713B2 (en) * 1983-08-31 1993-09-29 Sony Corp
JPS60208794A (en) * 1984-04-02 1985-10-21 株式会社アドバンテスト Display unit

Also Published As

Publication number Publication date
JPS6228473B2 (en) 1987-06-20

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