EP 0149788 A3 19870826 - DISPLAY CONTROL SYSTEM
Title (en)
DISPLAY CONTROL SYSTEM
Publication
Application
Priority
- JP 23433483 A 19831214
- JP 24367783 A 19831226
- JP 24367883 A 19831226
Abstract (en)
[origin: EP0149788A2] An improved display control system is disclosed which is capable of reducing the time necessary for executing its display operation. In this display control system, when a display memory (4) is to be accessed, its software supplies values of the X, Y coordinates of a display screen and these values are then converted into the physical addresses of the memory (4). For this purpose, a limit check function (33) is provided. Also, an X register (30) for setting up values on the X coordinate in a display unit (3A) may be formed by a counter, thereby eliminating the need for setting the values on the X coordinate each time. The display control system may also be capable of dealing with the change of a plurality of screen configurations in the above-mentioned X, Y coordinate system.
IPC 1-7
IPC 8 full level
G09G 5/391 (2006.01)
CPC (source: EP)
G09G 5/391 (2013.01)
Citation (search report)
- [A] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 23, no. 6, November 1980, pages 2342,2343, IBM, New York, US; D.R. MERSEL: "Highlighting image data on pel for pel adressable displays"
- [A] ELECTRONICS, vol. 45, no. 12, 5th June 1972, pages 111-116, New York, US; L.R. LOVERCHECK: "Raster scan technique provides multicolor graphic displays"
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0149788 A2 19850731; EP 0149788 A3 19870826; EP 0149788 B1 19920415; CA 1232381 A 19880202; DE 3485661 D1 19920521
DOCDB simple family (application)
EP 84115208 A 19841212; CA 469995 A 19841213; DE 3485661 T 19841212