EP0272006A3 - Display controller for data processing apparatuses - Google Patents

Display controller for data processing apparatuses Download PDF

Info

Publication number
EP0272006A3
EP0272006A3 EP87310229A EP87310229A EP0272006A3 EP 0272006 A3 EP0272006 A3 EP 0272006A3 EP 87310229 A EP87310229 A EP 87310229A EP 87310229 A EP87310229 A EP 87310229A EP 0272006 A3 EP0272006 A3 EP 0272006A3
Authority
EP
European Patent Office
Prior art keywords
cell
windows
alpha
recorded
display
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.)
Ceased
Application number
EP87310229A
Other languages
German (de)
French (fr)
Other versions
EP0272006A2 (en
Inventor
Pierangelo Tosi
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.)
Telecom Italia SpA
Original Assignee
Ing C Olivetti and C SpA
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 Ing C Olivetti and C SpA filed Critical Ing C Olivetti and C SpA
Publication of EP0272006A2 publication Critical patent/EP0272006A2/en
Publication of EP0272006A3 publication Critical patent/EP0272006A3/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/14—Display of multiple viewports
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/40—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which both a pattern determined by character code and another pattern are displayed simultaneously, or either pattern is displayed selectively, e.g. with character code memory and APA, i.e. all-points-addressable, memory

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Digital Computer Display Output (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The controller comprises a refresh memory (23) which can be activated under the control of a window mode signal for selectively storing a character code or a map of graphic points in each video display cell, corresponding to the alpha-numeric character matrix. An auxiliary memory (33) then stores for each cell a code which is indicative of the alpha-numeric or graphic mode in accordance with which the cell has been recorded, whereby a series of windows which are recorded in different ways can be simultaneously displayed under control of a control unit (19) which sets up the windows. The controller can operate in window mode with a monochrome or colour display. A positive character generator (34) can be selected to display of the characters in black on a white background.
EP87310229A 1986-12-16 1987-11-19 Display controller for data processing apparatuses Ceased EP0272006A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6793286 1986-12-16
IT67932/86A IT1196844B (en) 1986-12-16 1986-12-16 VIDEO GOVERNMENT FOR COMPUTER EQUIPMENT

Publications (2)

Publication Number Publication Date
EP0272006A2 EP0272006A2 (en) 1988-06-22
EP0272006A3 true EP0272006A3 (en) 1989-10-18

Family

ID=11306461

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87310229A Ceased EP0272006A3 (en) 1986-12-16 1987-11-19 Display controller for data processing apparatuses

Country Status (3)

Country Link
EP (1) EP0272006A3 (en)
JP (1) JPS63233425A (en)
IT (1) IT1196844B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071744A2 (en) * 1981-08-12 1983-02-16 International Business Machines Corporation Method for operating a computing system to write text characters onto a graphics display
EP0153789A2 (en) * 1984-02-27 1985-09-04 Philips Electronics Uk Limited Character memory addressing for data display
EP0175342A2 (en) * 1984-09-17 1986-03-26 Honeywell Bull Inc. Mixing of line drawings and text in a CRT display system
WO1986005910A1 (en) * 1985-04-03 1986-10-09 British Telecommunications Public Limited Company Video display apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS594591B2 (en) * 1979-06-11 1984-01-30 株式会社ハツコ− Waterproof structure for pipe penetrations in underground structures

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071744A2 (en) * 1981-08-12 1983-02-16 International Business Machines Corporation Method for operating a computing system to write text characters onto a graphics display
EP0153789A2 (en) * 1984-02-27 1985-09-04 Philips Electronics Uk Limited Character memory addressing for data display
EP0175342A2 (en) * 1984-09-17 1986-03-26 Honeywell Bull Inc. Mixing of line drawings and text in a CRT display system
WO1986005910A1 (en) * 1985-04-03 1986-10-09 British Telecommunications Public Limited Company Video display apparatus

Also Published As

Publication number Publication date
IT1196844B (en) 1988-11-25
JPS63233425A (en) 1988-09-29
IT8667932A0 (en) 1986-12-16
EP0272006A2 (en) 1988-06-22

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Inventor name: TOSI, PIERANGELO