JPS54129830A - Data display unit - Google Patents

Data display unit

Info

Publication number
JPS54129830A
JPS54129830A JP3659478A JP3659478A JPS54129830A JP S54129830 A JPS54129830 A JP S54129830A JP 3659478 A JP3659478 A JP 3659478A JP 3659478 A JP3659478 A JP 3659478A JP S54129830 A JPS54129830 A JP S54129830A
Authority
JP
Japan
Prior art keywords
display
screen
data
bit
display mode
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
JP3659478A
Other languages
Japanese (ja)
Inventor
Toshikazu Hikosaka
Kenji Masai
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 Engineering Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Engineering Co Ltd
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 Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Engineering Co Ltd
Priority to JP3659478A priority Critical patent/JPS54129830A/en
Publication of JPS54129830A publication Critical patent/JPS54129830A/en
Pending legal-status Critical Current

Links

Landscapes

  • Digital Computer Display Output (AREA)

Abstract

PURPOSE: To enable data display by arbitrarily selecting the display mode of superposition of screen, through the provision of display control bit every display data of a plurality of refresh memories.
CONSTITUTION: In the CRT display unit, the refresh memories 34 and 35 synchronizingly read out memorize the display data in the form that the display control bit RM is added every data section equal to one character. The content of the bit RM is designated with the microcomputer 32 depending on the instruction from external unit (such as CPU, keyboard and light pen) instructing the display mode, and the display mode to the screen is determined by judging the propriety of video- out to the screen depending on the instruction of the opposite bit RM corresponding every character and symbol, also in forming the video signal at the video signal forming circuit 40.
COPYRIGHT: (C)1979,JPO&Japio
JP3659478A 1978-03-31 1978-03-31 Data display unit Pending JPS54129830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3659478A JPS54129830A (en) 1978-03-31 1978-03-31 Data display unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3659478A JPS54129830A (en) 1978-03-31 1978-03-31 Data display unit

Publications (1)

Publication Number Publication Date
JPS54129830A true JPS54129830A (en) 1979-10-08

Family

ID=12474097

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3659478A Pending JPS54129830A (en) 1978-03-31 1978-03-31 Data display unit

Country Status (1)

Country Link
JP (1) JPS54129830A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57199376A (en) * 1981-06-03 1982-12-07 Hitachi Ltd Character graphic displaying circuit
JPS59197081A (en) * 1983-04-22 1984-11-08 横河電機株式会社 Graphic display unit
JPS62174794A (en) * 1986-01-14 1987-07-31 株式会社　アスキ− Color display unit
JPS6361287A (en) * 1986-09-02 1988-03-17 富士ゼロックス株式会社 Video signal generation circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5157246A (en) * 1974-11-15 1976-05-19 Hitachi Ltd
JPS5216934A (en) * 1975-07-30 1977-02-08 Hitachi Ltd Letter indication device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5157246A (en) * 1974-11-15 1976-05-19 Hitachi Ltd
JPS5216934A (en) * 1975-07-30 1977-02-08 Hitachi Ltd Letter indication device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57199376A (en) * 1981-06-03 1982-12-07 Hitachi Ltd Character graphic displaying circuit
JPS59197081A (en) * 1983-04-22 1984-11-08 横河電機株式会社 Graphic display unit
JPS62174794A (en) * 1986-01-14 1987-07-31 株式会社　アスキ− Color display unit
JP2572373B2 (en) * 1986-01-14 1997-01-16 株式会社 アスキ− Color display device
JPS6361287A (en) * 1986-09-02 1988-03-17 富士ゼロックス株式会社 Video signal generation circuit

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