INT 62 u - FGDRIVER v3.03 - "FG_GETINDEX" - GET COLOR VALUE FOR COLOR INDEX
        AX = 0039h
        BX = color index (0000h to 00FFh)
Return: AX = color value for specified color index
Notes:  For FGDRIVER v1.10, this function was unused;"FG_GETINDEX" was AX=0016h
        This call returns the value passed to it in text and 256-color
          graphics modes
SeeAlso: AX=0016h,AX=0034h

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