INT 10 - VIDEO - DRAW TO POINT (Hercules GRAFIX)
        AH = 49h
        DI = x (0-720)
        BP = y (0-347)
Note:   function 48h or 49h specify first point, 44h operation and 43h page to
          use
SeeAlso: AH=43h,AH=44h,AH=48h,AH=4Ch,AH=4Dh

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