implemented Retlw instruction

de/darkress/pic16f84sim/commands/Retlw.java

@@ -17,6 +17,8 @@ public class Retlw extends CommandUtils implements Command
     public void execute()
     {
         Memory.workingRegister = literal;
-        ProgramCounter.setPcFromStack(Stack.pop());
+        ProgramCounter.setPcFrom11BitLiteral(Stack.pop());
+        //TODO: This may need some rework since it does not really load all 13 Bit into the PC. Only 8 Bit are
+        // effectively set
     }
 }

de/darkress/pic16f84sim/commands/Return.java

@@ -8,6 +8,8 @@ public class Return extends CommandUtils implements Command
     @Override
     public void execute()
     {
-        ProgramCounter.setPcFromStack(Stack.pop());
+        ProgramCounter.setPcFrom11BitLiteral(Stack.pop());
+        //TODO: This may need some rework since it does not really load all 13 Bit into the PC. Only 8 Bit are
+        // effectively set
     }
 }

de/darkress/pic16f84sim/microcontroller/Memory.java

@@ -59,10 +59,6 @@ public class Memory
         }
         memory[address] = data;
         memory[address + 128] = data; //Ensure data is written to both banks to simulate mapping
-        if(address == 0x2) //Check if PCL is destination
-        {
-            ProgramCounter.loadPc();
-        }
     }
 
     private static int getDataFromIndirectAddress(int address)
@@ -79,10 +75,6 @@ public class Memory
         }
         memory[address % 128] = data; // else: Registers.Registers which are mapped
         memory[address % 128 + 128] = data; //Ensure data is written to both banks to simulate mapping
-        if(address == 0x2) //Check if PCL is destination
-        {
-            ProgramCounter.loadPc();
-        }
     }
 
     private static int getRegisterBank()

de/darkress/pic16f84sim/microcontroller/ProgramCounter.java

@@ -20,20 +20,19 @@ public class ProgramCounter
         pc = (pch) + pcl;
     }
 
-    public static void setPcFromStack(int stack)
-    {
-        pc = stack;
-        Memory.setPCL(pc & 0x00FF);
-    }
-
-    public static void loadPc()
-    {
-        pc = (Memory.getPCLATH() <<8) + Memory.getPCL();
-    }
-
     public static void incPC() //is called after every instruction execution
     {
-        pc++;
+        int pcl = Memory.getPCL();
-        Memory.setPCL(pc & 0x00FF);
+        int pclath = Memory.getPCLATH();
+        if(pcl == 0xFF)
+        {
+            pclath++;
+            pcl = 0;
+        } else {
+            pcl++;
+        }
+        Memory.setPCL(pcl);
+        Memory.setPCLATH(pclath);
+        pc = (pclath <<8) + pcl;
     }
 }