Variable format alphanumeric display system

Details Variable format alphanumeric display system Variable format alphanumeric display system

G - Physics

06

F

375/32

G06F 3/14 (2006.01) G09G 1/00 (2006.01)

Patent

CA 1119326

ABSTRACT Most present day CRT alphanumeric displays have a fixed screen layout. Here additional alternative screen layouts e.g. split screen layout are provided by hardware with operator selection. A raster scanned CRT display is described having a refresh buffer in which alphanumeric data to be displayed is stored in a first sequence of addresses. When the refresh buffer is addressed by the first sequence of addresses a first screen layout results. This will normally be a "full screen" layout. A translation store (ROS or RAM) provides a modified sequence of translated addresses when addressed by the first sequence of addresses. The refresh buffer is selectively addressed by the modified sequence of translated addresses to display the data in a second screen layout. Each alternative screen layout requires an associated sequence of translated addresses to determine where the data should be displayed on the screen. Split screen layout, selectable line length layout, and Hanguel language character layout are described. -1- UK9-78-013

318416

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