GB2189632B - Microprocessor video display system - Google Patents

Microprocessor video display system

Info

Publication number
GB2189632B
GB2189632B GB8708478A GB8708478A GB2189632B GB 2189632 B GB2189632 B GB 2189632B GB 8708478 A GB8708478 A GB 8708478A GB 8708478 A GB8708478 A GB 8708478A GB 2189632 B GB2189632 B GB 2189632B
Authority
GB
United Kingdom
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.)
Expired - Lifetime
Application number
GB8708478A
Other versions
GB2189632A (en
GB8708478D0 (en
Inventor
John 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 GB8708478D0 publication Critical patent/GB8708478D0/en
Publication of GB2189632A publication Critical patent/GB2189632A/en
Application granted granted Critical
Publication of GB2189632B publication Critical patent/GB2189632B/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
GB8708478A 1986-04-10 1987-04-09 Microprocessor video display system Expired - Lifetime GB2189632B (en)

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
GB8708478D0 GB8708478D0 (en) 1987-05-13
GB2189632A GB2189632A (en) 1987-10-28
GB2189632B true GB2189632B (en) 1990-03-14

Family

ID=10595998

Family Applications (2)

Application Number Title Priority Date Filing Date
GB868608776A Pending GB8608776D0 (en) 1986-04-10 1986-04-10 Video memory contention mechanism
GB8708478A Expired - Lifetime GB2189632B (en) 1986-04-10 1987-04-09 Microprocessor video display system

Family Applications Before (1)

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

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
EP0283565B1 (en) * 1987-03-20 1992-12-30 International Business Machines Corporation Computer system with video subsystem
US5001652A (en) * 1987-03-20 1991-03-19 International Business Machines Corporation Memory arbitration for video subsystems
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

Family Cites Families (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
JPS55127656A (en) * 1979-03-26 1980-10-02 Agency Of Ind Science & Technol Picture memory unit
JPS588348A (en) * 1981-07-07 1983-01-18 Sony Corp Microcomputer
JPS58192148A (en) * 1982-05-07 1983-11-09 Hitachi Ltd Operation processor

Also Published As

Publication number Publication date
GB2189632A (en) 1987-10-28
GB8708478D0 (en) 1987-05-13
ES2029833T3 (en) 1992-10-01
DE3776940D1 (en) 1992-04-09
GB8608776D0 (en) 1986-05-14
EP0241288B1 (en) 1992-03-04
EP0241288A3 (en) 1989-02-08
EP0241288A2 (en) 1987-10-14

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980409