INT 10 - VIDEO - SET COLOR PALETTE
        {ega} CGA-compatible modes
        AH = 0Bh
        BH = palette color ID
        BL = color to be used with color ID
        {ega} (graphics modes)
        if BH == 0, BL contains background and border colors (0-15)
        if BH == 1, BL contains palette being selected (0-1)
              (text modes)
        if BH == 0, BL contains border color (0-15) only
                    {ega} BL contains border color (0-15) and high-intensity
                    background color (16-31)
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