DISPLAY METHOD OF DISPLAY DEVICE IN MACHINE TOOL CONTROLLER

摘要

PROBLEM TO BE SOLVED: To display two display pictures so as to respectively identify and observe both the display pictures in a superposed state on a color CRT display device for a controller. SOLUTION: Respective synthetic color data obtained by synthesizing the color data of respective pixels in a 1st picture out of two display pictures to be displayed and the color data of respective pixels in a 2nd picture corresponding to the pixels of the 1st picture by arithmetic OR operation are sucessively stored in respective corresponding address positions of a video RAM and the stored synthetic color data are read out and displayd on the CRT.