[A83] DisplayImage

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[A83] DisplayImage

Does anyone know why the rom call DisplayImage would sometimes write
garbage instead of the proper image? Is there a bug or anything in it?
 
 
                        Set plotLoc,(iy+plotFlags)
                        ld hl,CurImage
                        B_CALL DisplayImage
                        res plotLoc,(iy+plotFlags)
                        ret
 
CurImage: db 2,5
            db 11011000b
            db 00100000b
 
Sometimes this code works fine..Other times, it prints out 2 rows of
garbage to the end of the screen, from the position I set DE to. Any
idea why? Thanks
-Tom
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