INT 62 u - FGDRIVER v3.03 - "FG_DEFCOLOR" - ASSIGN COLOR VALUE TO COLOR INDEX
        AX = 0016h
        BX = color index (0000h-00FFh)
        CX = new color value (0 to maximum color value for current video mode)
Notes:  For FGDRIVER v1.10, this function was "FG_GETINDEX" (see AX=0039h);
          "FG_DEFCOLOR" was AX=0014h
        This call is ignored in text modes and 256-color graphics modes
SeeAlso: AX=0034h,AX=0039h,AX=008Dh

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