EP0229986A3 - Cursor circuit for a dual port memory - Google Patents

Cursor circuit for a dual port memory Download PDF

Info

Publication number
EP0229986A3
EP0229986A3 EP86117314A EP86117314A EP0229986A3 EP 0229986 A3 EP0229986 A3 EP 0229986A3 EP 86117314 A EP86117314 A EP 86117314A EP 86117314 A EP86117314 A EP 86117314A EP 0229986 A3 EP0229986 A3 EP 0229986A3
Authority
EP
European Patent Office
Prior art keywords
dual port
port memory
cursor circuit
cursor
circuit
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
EP86117314A
Other versions
EP0229986B1 (en
EP0229986A2 (en
Inventor
John Stephen Muhich
Joseph Stoddard Thornley
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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
Priority claimed from US06/820,487 external-priority patent/US4767460A/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0229986A2 publication Critical patent/EP0229986A2/en
Publication of EP0229986A3 publication Critical patent/EP0229986A3/en
Application granted granted Critical
Publication of EP0229986B1 publication Critical patent/EP0229986B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G09G5/08—Cursor circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Digital Computer Display Output (AREA)
EP19860117314 1986-01-17 1986-12-12 Cursor circuit for a dual port memory Expired - Lifetime EP0229986B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/820,487 US4767460A (en) 1985-01-29 1986-01-17 Cement compositions for cementing of wells enabling gas channelling in the cemented annulus to be inhibited by right-angle setting
US820487 1986-01-17

Publications (3)

Publication Number Publication Date
EP0229986A2 EP0229986A2 (en) 1987-07-29
EP0229986A3 true EP0229986A3 (en) 1989-12-27
EP0229986B1 EP0229986B1 (en) 1994-03-02

Family

ID=25230920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860117314 Expired - Lifetime EP0229986B1 (en) 1986-01-17 1986-12-12 Cursor circuit for a dual port memory

Country Status (2)

Country Link
EP (1) EP0229986B1 (en)
DE (1) DE3689691T2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1317041C (en) * 1987-12-24 1993-04-27 Ncr Corporation Apparatus for creating a cursor pattern by strips related to individual scan lines
GB2243521B (en) * 1990-04-11 1993-12-08 Afe Displays Ltd Image display system
GB2252224A (en) * 1990-12-12 1992-07-29 Apple Computer Providing an overlay e.g. a cursor, for a computer display

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566000A (en) * 1983-02-14 1986-01-21 Prime Computer, Inc. Image display apparatus and method having virtual cursor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4566000A (en) * 1983-02-14 1986-01-21 Prime Computer, Inc. Image display apparatus and method having virtual cursor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, vol. 26, no. 10B, March 1984, pages 5622-5623, New York, US; A.C. GAY: "Cursor display on raster graphic devices" *
IEEE COMPCON SPRING '85 DIGEST OF PAPERS, San Francisco, California, 25th-28th February 1985, pages 276-279, IEEE, New York, US; K. GUTTAG et al.: "New silicon to solve fundamental graphics problems" *

Also Published As

Publication number Publication date
DE3689691T2 (en) 1994-09-15
EP0229986B1 (en) 1994-03-02
EP0229986A2 (en) 1987-07-29
DE3689691D1 (en) 1994-04-07

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