if(nine) {	// receive HHHHLLLL
			high |= (a&0xF0) >> 4;	// high: 0000HHHH  <- replace with high = (a&0xF0) >> 4;
			low |= (a&0x0F) << 4;	// low: LLLLXXXX <- replace with low = (a&0x0F) << 4;