Crt display control system

Details Crt display control system Crt display control system

G - Physics

09

G

375/23

G09G 1/00 (2006.01) G09G 5/22 (2006.01)

Patent

CA 1235534

-10- ABSTRACT OF THE DISCLOSURE A CRT display control system controls a character display operation on a CRT image screen. Ah entire line height is divided into a display allowed raster section and a display inhibited raster section. The display allowed raster section is provided for displaying characters. The display inhibited raster section functions as a line spacing. When the character matrix size is changed, the display allowed raster section and the display inhibited raster section are modified through the use of a preset system so that the line spacing is easily determined without modifying the circuit construction.

472506

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