EP0223557A3 - Display control in a data processing system - Google Patents

Display control in a data processing system Download PDF

Info

Publication number
EP0223557A3
EP0223557A3 EP86308825A EP86308825A EP0223557A3 EP 0223557 A3 EP0223557 A3 EP 0223557A3 EP 86308825 A EP86308825 A EP 86308825A EP 86308825 A EP86308825 A EP 86308825A EP 0223557 A3 EP0223557 A3 EP 0223557A3
Authority
EP
European Patent Office
Prior art keywords
memory
software
logical
video
tion
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
EP86308825A
Other languages
German (de)
French (fr)
Other versions
EP0223557A2 (en
Inventor
Walter A. O'brien
David L. Rich
Charles C. Hurd
Michael Pogue
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.)
EMC Corp
Original Assignee
Data General Corp
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 Data General Corp filed Critical Data General Corp
Publication of EP0223557A2 publication Critical patent/EP0223557A2/en
Publication of EP0223557A3 publication Critical patent/EP0223557A3/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

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

In a distributed computer system, each CPU (101) ac­ cesses memory via an intelligent memory control unit (401) connected by a memory bus (404) to a local memory (102) and video memory (113) and by an interface bus to other memory control units (401) In the system. A video control unit (406) relieves the CPU (101) of much of the detailed work of modify­ ing bit maps in the video memory (113). More specifically, in order to enhance the ability of the system to manage displays, especially in a technical graphics environment, where a single physical display supports a plurality of logical displays (win­ dows), machine-language (graphics) instructions are provided which, in conjunction with logical display descriptors (forms) that describe each window, enable management and genera­ tion of display image data to be performed directly by the processing hardware of the digital computer system, minimiz­ ing the need for intervening software. Mechanisms are pro­ vided which gives the hardware the ability to defer complex protection and creation policies (faults) to operating system software. Data computed from the logical display descriptors may be encached, greatly enhancing the speed of consecutive operations on windows. Graceful creation is enhanced by per­ mitting prosessing control to escape (trap) to software emula­ tion handlers.
EP86308825A 1985-11-15 1986-11-12 Display control in a data processing system Ceased EP0223557A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US79875585A 1985-11-15 1985-11-15
US798755 1985-11-15

Publications (2)

Publication Number Publication Date
EP0223557A2 EP0223557A2 (en) 1987-05-27
EP0223557A3 true EP0223557A3 (en) 1989-04-05

Family

ID=25174185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86308825A Ceased EP0223557A3 (en) 1985-11-15 1986-11-12 Display control in a data processing system

Country Status (2)

Country Link
EP (1) EP0223557A3 (en)
JP (1) JPS62216032A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215168A (en) * 1988-02-23 1989-09-13 Ibm Windows with restricted colour range have priority defined by colour codes
JP3057460B2 (en) * 1991-08-22 2000-06-26 インターナショナル・ビジネス・マシーンズ・コーポレイション Multiprocessor system and graphics display using the multiprocessor system
CA2105055C (en) * 1993-01-05 1998-06-16 Jeffrey Scott Boston Window restoration methods for halted debuggee window applications
US5487145A (en) * 1993-07-09 1996-01-23 Taligent, Inc. Method and apparatus for compositing display items which minimizes locked drawing areas
GB201119206D0 (en) 2011-11-07 2011-12-21 Canon Kk Method and device for providing compensation offsets for a set of reconstructed samples of an image

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517448A1 (en) * 1981-11-27 1983-06-03 Hitachi Ltd APPARATUS FOR CONTROLLING AN IMAGE DISPLAY DEVICE AND METHOD FOR CONTROLLING SUCH A DEVICE
WO1984001655A1 (en) * 1982-10-07 1984-04-26 Western Electric Co Dynamic generation and overlaying of graphic windows for multiple active program storage areas
FR2535497A1 (en) * 1982-11-02 1984-05-04 Cadtrak Corp GRAPHIC VIEWING SYSTEM WITH WINDOWS HAVING ARBITRARY POSITION AND CONTENT
EP0121015A1 (en) * 1983-03-31 1984-10-10 International Business Machines Corporation Presentation space management and viewporting on a multifunction virtual terminal
EP0149309A2 (en) * 1983-11-03 1985-07-24 Unisys Corporation System for electronically displaying multiple images on a CRT screen such that some images are more prominent than others
EP0176950A2 (en) * 1984-09-27 1986-04-09 Wang Laboratories Inc. Screen manager for data processing system
EP2535497A1 (en) * 2011-06-16 2012-12-19 Somfy SAS Arrangement for heat insulation and solar protection

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60135989A (en) * 1983-12-26 1985-07-19 株式会社日立製作所 Display area mapping system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517448A1 (en) * 1981-11-27 1983-06-03 Hitachi Ltd APPARATUS FOR CONTROLLING AN IMAGE DISPLAY DEVICE AND METHOD FOR CONTROLLING SUCH A DEVICE
WO1984001655A1 (en) * 1982-10-07 1984-04-26 Western Electric Co Dynamic generation and overlaying of graphic windows for multiple active program storage areas
FR2535497A1 (en) * 1982-11-02 1984-05-04 Cadtrak Corp GRAPHIC VIEWING SYSTEM WITH WINDOWS HAVING ARBITRARY POSITION AND CONTENT
EP0121015A1 (en) * 1983-03-31 1984-10-10 International Business Machines Corporation Presentation space management and viewporting on a multifunction virtual terminal
EP0149309A2 (en) * 1983-11-03 1985-07-24 Unisys Corporation System for electronically displaying multiple images on a CRT screen such that some images are more prominent than others
EP0176950A2 (en) * 1984-09-27 1986-04-09 Wang Laboratories Inc. Screen manager for data processing system
EP2535497A1 (en) * 2011-06-16 2012-12-19 Somfy SAS Arrangement for heat insulation and solar protection

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MICROCOMPUTERS, USAGE AND DESIGN, ELEVENTH EUROMICRO SYMPOSIUM ON MICROPROCESSING AND MICROPROGRAMMING, Brussels, 3rd-6th September 1985, pages 427-432, Euromicro, Elsevier Science Publishers B.V. (North-Holland), NL; A.DE WOLF: "Implementation of a window manager for a professional workstation" *
THE COMPUTER JOURNAL, vol. 27, no. 2, May 1984, pages 112-120, Wiley Heyden Ltd, London, GB; A.J. WILKES et al.: "The rainbow workstation" *

Also Published As

Publication number Publication date
JPS62216032A (en) 1987-09-22
EP0223557A2 (en) 1987-05-27

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Inventor name: POGUE,MICHAEL

Inventor name: HURD,CHARLES C.

Inventor name: RICH,DAVID L.

Inventor name: O'BRIEN,WALTER A.