public String getColumnName(int columnIndex) {
			switch(columnIndex) {
			case 0: return "Reg";
			case 1: return "Name";
			case 2: return "Compatible";
			case 3: return "Max Speed";
			case 4: return "CPOL";
			case 5: return "CPHA";
			case 6: return "CS active high";
			default: return null;
			}
		}