EP0241288A3 - Microprocessor video display system - Google Patents

Microprocessor video display system Download PDF

Info

Publication number
EP0241288A3
EP0241288A3 EP87303096A EP87303096A EP0241288A3 EP 0241288 A3 EP0241288 A3 EP 0241288A3 EP 87303096 A EP87303096 A EP 87303096A EP 87303096 A EP87303096 A EP 87303096A EP 0241288 A3 EP0241288 A3 EP 0241288A3
Authority
EP
European Patent Office
Prior art keywords
display system
video display
microprocessor video
microprocessor
video
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
EP87303096A
Other versions
EP0241288A2 (en
EP0241288B1 (en
Inventor
John Flare Technology Mathieson
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.)
Amstrad PLC
Original Assignee
Amstrad PLC
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 Amstrad PLC filed Critical Amstrad PLC
Publication of EP0241288A2 publication Critical patent/EP0241288A2/en
Publication of EP0241288A3 publication Critical patent/EP0241288A3/en
Application granted granted Critical
Publication of EP0241288B1 publication Critical patent/EP0241288B1/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
    • G09G5/001—Arbitration of resources in a display system, e.g. control of access to frame buffer by video controller and/or main processor
EP87303096A 1986-04-10 1987-04-09 Microprocessor video display system Expired - Lifetime EP0241288B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868608776A GB8608776D0 (en) 1986-04-10 1986-04-10 Video memory contention mechanism
GB8608776 1986-04-10

Publications (3)

Publication Number Publication Date
EP0241288A2 EP0241288A2 (en) 1987-10-14
EP0241288A3 true EP0241288A3 (en) 1989-02-08
EP0241288B1 EP0241288B1 (en) 1992-03-04

Family

ID=10595998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87303096A Expired - Lifetime EP0241288B1 (en) 1986-04-10 1987-04-09 Microprocessor video display system

Country Status (4)

Country Link
EP (1) EP0241288B1 (en)
DE (1) DE3776940D1 (en)
ES (1) ES2029833T3 (en)
GB (2) GB8608776D0 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5001652A (en) * 1987-03-20 1991-03-19 International Business Machines Corporation Memory arbitration for video subsystems
GB2202719B (en) * 1987-03-20 1991-07-24 Ibm Computer system with video subsystem
JP2557077B2 (en) * 1987-12-21 1996-11-27 エイ・ティ・アンド・ティ グローバル インフォメーション ソルーションズ インターナショナル インコーポレイテッド Synchronous access type character display system
GB9027678D0 (en) * 1990-12-20 1991-02-13 Ncr Co Videographics display system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263648A (en) * 1978-12-26 1981-04-21 Honeywell Information Systems Inc. Split system bus cycle for direct memory access of peripherals in a cathode ray tube display system
US4326202A (en) * 1979-03-26 1982-04-20 The President Of The Agency Of Industrial Science & Technology Image memory device
FR2509492A1 (en) * 1981-07-07 1983-01-14 Sony Corp MEMORY ACCESS CONTROL APPARATUS FOR MICROCALCULATOR
EP0094042A2 (en) * 1982-05-07 1983-11-16 Hitachi, Ltd. Data processing apparatus wherein a system bus is shared by two or more circuits

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263648A (en) * 1978-12-26 1981-04-21 Honeywell Information Systems Inc. Split system bus cycle for direct memory access of peripherals in a cathode ray tube display system
US4326202A (en) * 1979-03-26 1982-04-20 The President Of The Agency Of Industrial Science & Technology Image memory device
FR2509492A1 (en) * 1981-07-07 1983-01-14 Sony Corp MEMORY ACCESS CONTROL APPARATUS FOR MICROCALCULATOR
EP0094042A2 (en) * 1982-05-07 1983-11-16 Hitachi, Ltd. Data processing apparatus wherein a system bus is shared by two or more circuits

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ELECTRONIC DESIGN *
ELECTRONICS *

Also Published As

Publication number Publication date
EP0241288A2 (en) 1987-10-14
ES2029833T3 (en) 1992-10-01
GB2189632A (en) 1987-10-28
GB8608776D0 (en) 1986-05-14
DE3776940D1 (en) 1992-04-09
EP0241288B1 (en) 1992-03-04
GB8708478D0 (en) 1987-05-13
GB2189632B (en) 1990-03-14

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