function _storePalette()
    {
        $aref            = $this->_palette;

        $record          = 0x0092;                 // Record identifier
        $length          = 2 + 4 * count($aref);   // Number of bytes to follow
        $ccv             =         count($aref);   // Number of RGB values to follow
        $data = '';                                // The RGB data

        // Pack the RGB data
        foreach ($aref as $color) {
            foreach ($color as $byte) {
                $data .= pack("C",$byte);
            }
        }

        $header = pack("vvv",  $record, $length, $ccv);
        $this->_append($header . $data);
    }