diff --git a/PIC_Simulator/PIC/PICProgramm.cs b/PIC_Simulator/PIC/PICProgramm.cs
index 56937b4..7f4ff9a 100644
--- a/PIC_Simulator/PIC/PICProgramm.cs
+++ b/PIC_Simulator/PIC/PICProgramm.cs
@@ -119,7 +119,7 @@ namespace PIC_Simulator.PIC
 		public List<int> Breakpoints = new List<int>();
 
 		public int TaktgeberFrequenz = 100000;
-		public int TaktgeberZahler = 100000;
+		public int TaktgeberZahler = 0;
 		public bool TaktgeberAktiviert = false;
 		public uint TaktgeberAdresse = 0;
 		public uint TaktgeberBitnummer = 0;
@@ -188,7 +188,7 @@ namespace PIC_Simulator.PIC
 					if (cmd[i] == 'b' && bin[i] == '0') { p_b <<= 1; p_b |= 0; continue; }
 					if (cmd[i] == 'b' && bin[i] == '1') { p_b <<= 1; p_b |= 1; continue; }
 					if (cmd[i] == '0' && bin[i] == '1') { ok = false; break; }
-					if (cmd[i] == '1' && bin[i] == '0') { ok = false; continue; }
+					if (cmd[i] == '1' && bin[i] == '0') { ok = false; break; }
 
 					throw new Exception("Falscher wert in cmd");
 				}
diff --git a/PIC_Simulator/PIC/RS232Verbindung.cs b/PIC_Simulator/PIC/RS232Verbindung.cs
index f9415cf..73674c1 100644
--- a/PIC_Simulator/PIC/RS232Verbindung.cs
+++ b/PIC_Simulator/PIC/RS232Verbindung.cs
@@ -41,6 +41,7 @@ namespace PIC_Simulator.PIC
 			List<string> result = new List<string>();
 
 			ArrayComPortsNames = SerialPort.GetPortNames();
+			if (ArrayComPortsNames.Length == 0) return result;
 			do
 			{
 				index += 1;