Multiple process, windowed display system

Details Multiple process, windowed display system Multiple process, windowed display system

G - Physics

09

G

354/236.2

G09G 1/00 (2006.01) G09G 5/14 (2006.01)

Patent

CA 1268556

Abstract An appartus for displaying the display outputs of a plurality of simultaneously active computer processes in corresponding windows on a single screen includes a microcomputer, a display screen and display system software. The software represents a plurality of virtual terminals, one corresponding to each active process, for emulating the operation of real terminals communicating with the processes. Each virtual terminal maintains a display list comprising a set of instructions defining a display on a screen according to the output from the corresponding process. The software also includes a screen process for maintaining a subrectangle list comprising a set of instructions for allo- cating window portions of the screen to the dis- plays defined by the separate display lists. A display list processor is provided for creating the windows on the screen according to the display and subrectangle lists.

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