public void XbIDX9Neg (int n, int newNumber, String Step2){
			
			int minus = 256;
			String ff;
			int ln;
			
			switch(n)
			{
				
				case 0:
					Step2 = Step2.replace("xb", "E1");
					minus = minus - newNumber;
					
					ff = Integer.toHexString(minus);
					ln = ff.length();
					
					if(ln == 1)
						ff = "0" + ff;
					
					Step2 = Step2.replace("ff", ff);
					machCod2.add(Step2);
					break;
					
				case 1:
					Step2 = Step2.replace("xb", "E9");
					minus = minus - newNumber;
					
					ff = Integer.toHexString(minus);
					ln = ff.length();
					
					if(ln == 1)
						ff = "0" + ff;
					
					Step2 = Step2.replace("ff", ff);
					machCod2.add(Step2);
					break;
				
				case 2:
					Step2 = Step2.replace("xb", "F1");
					minus = minus - newNumber;
					
					ff = Integer.toHexString(minus);
					ln = ff.length();
					
					if(ln == 1)
						ff = "0" + ff;
					
					Step2 = Step2.replace("ff", ff);
					machCod2.add(Step2);
					break;
					
				case 3:
					Step2 = Step2.replace("xb", "F9");
					minus = minus - newNumber;
					
					ff = Integer.toHexString(minus);
					ln = ff.length();
					
					if(ln == 1)
						ff = "0" + ff;
					
					Step2 = Step2.replace("ff", ff);
					machCod2.add(Step2);
					break;
					
				default:
					break;			
			
			}
		
		}