


      INVERT(1)                  (Bull-SPS9)                  INVERT(1)



      NAME
           invert - invert Bull-SPS9 monochromatic display screen

      SYNTAX
           invert [option]

      DESCRIPTION
           Invert with no option reverses the contrast on the display
           screen. White characters on a black screen turn to black
           characters on a white screen, or vice versa. Screen memory
           bits are not modified; the display hardware handles the
           change. The current state of the screen remains fixed until
           inverted again. This interpretation remains in effect until
           the next invert(1).

           The following mutually exclusive options are recognized:

           -i   Invert the current contrast (same as no option).

           -b   Set the screen background to black, with white
                characters.

           -w   Set the screen background to white, with black
                characters (initial contrast).































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