implemented Retlw instruction

de/darkress/pic16f84sim/Main.java

@@ -12,10 +12,12 @@ class Main
     public static void main(String[] args) {
 
         ArrayList<Command> program = new ArrayList<>();
-        Memory.workingRegister = 0x01;
-        Memory.setRegister(0x14, 0xA5); //240 << 224
-        program.add(CommandDecoder.decode(0x1114));
-        for(int i = 0; i < program.size(); i++)
+        int input1 = 0x27FF;
+        program.add(CommandDecoder.decode(0x3011));
+        program.add(CommandDecoder.decode(0x2003));
+        program.add(CommandDecoder.decode(0x3022));
+        program.add(CommandDecoder.decode(0x0008));
+        while(true)
         {
             program.get(ProgramCounter.getPc()).execute();
         }

de/darkress/pic16f84sim/commands/Addlw.java

@@ -3,7 +3,7 @@ package de.darkress.pic16f84sim.commands;
 import de.darkress.pic16f84sim.microcontroller.Memory;
 import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
 
-public class Addlw extends LiteralCommandUtils implements Command
+public class Addlw extends CommandUtils implements Command
 {
     private final int literal;
 

de/darkress/pic16f84sim/commands/Addwf.java

@@ -1,29 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Addwf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Addwf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address) + Memory.workingRegister;
-
-        checkZeroBit(result);
-        checkCarryBit(result);
-        checkDigitCarryBit(address);
-
-        writeToDestination(destinationBit, address, result);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Andlw.java

@@ -2,7 +2,7 @@ package de.darkress.pic16f84sim.commands;
 
 import de.darkress.pic16f84sim.microcontroller.Memory;
 
-public class Andlw extends LiteralCommandUtils implements Command
+public class Andlw extends CommandUtils implements Command
 {
     private final int literal;
 

de/darkress/pic16f84sim/commands/Andwf.java

@@ -1,27 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Andwf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Andwf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address) & Memory.workingRegister;
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Bcf.java

@@ -1,26 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Bcf extends BitOrientedCommandUtils implements Command
-{
-    private final int address;
-    private int bitPlacement;
-
-    public Bcf(int input)
-    {
-        address = input & 0x007F;
-        bitPlacement = checkBitPlacement(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address);
-        result &= ~(1 << bitPlacement); //Mask n-th bit with 0
-
-        Memory.setRegister(address, result);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/BitOrientedCommandUtils.java

@@ -1,11 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-
-public class BitOrientedCommandUtils
-{
-    protected int checkBitPlacement(int input)
-    {
-        return ((input & 0x0380) >>7);
-    }
-}

de/darkress/pic16f84sim/commands/Call.java

@@ -3,7 +3,7 @@ package de.darkress.pic16f84sim.commands;
 import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
 import de.darkress.pic16f84sim.microcontroller.Stack;
 
-public class Call extends LiteralCommandUtils implements Command
+public class Call extends CommandUtils implements Command
 {
     private final int literal;
 

de/darkress/pic16f84sim/commands/Clrf.java

@@ -1,27 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Clrf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Clrf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = true;
-    }
-
-    @Override
-    public void execute()
-    {
-        final int result = 0;
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Clrw.java

@@ -1,18 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Clrw extends FileRegisterCommandUtils implements Command
-{
-    @Override
-    public void execute()
-    {
-        final int result = 0;
-
-        checkZeroBit(result);
-
-        Memory.workingRegister = result;
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Comf.java

@@ -1,27 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Comf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Comf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = 255 - Memory.getRegister(address); // Get inverse of 8Bit value
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/CommandUtils.java

@@ -2,7 +2,7 @@ package de.darkress.pic16f84sim.commands;
 
 import de.darkress.pic16f84sim.microcontroller.Memory;
 
-public class LiteralCommandUtils
+public class CommandUtils
 {
     protected void checkZeroBit(int result)
     {

de/darkress/pic16f84sim/commands/Decf.java

@@ -1,27 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Decf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Decf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address) + 255; // Allow underflow
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result % 256); // Catch underflow
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Decfsz.java

@@ -1,33 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Decfsz extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Decfsz(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address) + 255; // Allow underflow
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result % 256); // Catch underflow
-
-        if((result % 256) == 0)
-        {
-            Nop nop = new Nop();
-            nop.execute(); // TODO: What happens if an interrupt gets triggered during the nop execution?
-        }
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/FileRegisterCommandUtils.java

@@ -1,51 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-
-public class FileRegisterCommandUtils
-{
-    protected void checkZeroBit(int result)
-    {
-        if((result % 256) == 0){
-            Memory.setZeroBit();
-        } else{
-            Memory.clearZeroBit();
-        }
-    }
-
-    protected void checkCarryBit(int result)
-    {
-        if(result > 255){
-            Memory.setCarryBit();
-        } else{
-            Memory.clearCarryBit();
-        }
-    }
-
-    protected void checkDigitCarryBit(int address)
-    {
-        int literal = Memory.getRegister(address);
-        if(((Memory.workingRegister & 0x0F) + (literal & 0x0F)) > 15){
-            Memory.setDigitCarryBit();
-        } else{
-            Memory.clearDigitCarryBit();
-        }
-    }
-
-    protected void writeToDestination(boolean destinationBit, int fileAddress, int result)
-    {
-        if(destinationBit)
-        {
-            //Store in FileRegister
-            Memory.setRegister(fileAddress, result);
-        } else {
-            //Store in WRegister
-            Memory.workingRegister = result;
-        }
-    }
-
-    protected boolean checkDestinationBit(int input)
-    {
-        return (input & 0x0080) == 0x0080;
-    }
-}

de/darkress/pic16f84sim/commands/Goto.java

@@ -2,7 +2,7 @@ package de.darkress.pic16f84sim.commands;
 
 import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
 
-public class Goto extends LiteralCommandUtils implements Command
+public class Goto extends CommandUtils implements Command
 {
     private final int literal;
 

de/darkress/pic16f84sim/commands/Incf.java

@@ -1,27 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Incf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Incf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address) + 1; // Allow underflow
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result % 256); // Catch underflow
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Incfsz.java

@@ -1,33 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Incfsz extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Incfsz(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address) + 1;
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result % 256);
-
-        if((result % 256) == 0)
-        {
-            Nop nop = new Nop();
-            nop.execute(); // TODO: What happens if an interrupt gets triggered during the nop execution?
-        }
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Iorlw.java

@@ -2,7 +2,7 @@ package de.darkress.pic16f84sim.commands;
 
 import de.darkress.pic16f84sim.microcontroller.Memory;
 
-public class Iorlw extends LiteralCommandUtils implements Command
+public class Iorlw extends CommandUtils implements Command
 {
     private final int literal;
 

de/darkress/pic16f84sim/commands/Iorwf.java

@@ -1,27 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Iorwf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Iorwf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address) | Memory.workingRegister;
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Movf.java

@@ -1,27 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Movf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Movf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address);
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Movlw.java

@@ -1,9 +1,8 @@
 package de.darkress.pic16f84sim.commands;
 
 import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
 
-public class Movlw extends LiteralCommandUtils implements Command
+public class Movlw extends CommandUtils implements Command
 {
     private final int literal;
 
@@ -16,6 +15,5 @@ public class Movlw extends LiteralCommandUtils implements Command
     public void execute()
     {
         Memory.workingRegister = literal;
-        ProgramCounter.incPC();
     }
 }

de/darkress/pic16f84sim/commands/Movwf.java

@@ -1,25 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Movwf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Movwf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = true;
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.workingRegister;
-
-        writeToDestination(destinationBit, address, result);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Nop.java

@@ -1,14 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Nop extends LiteralCommandUtils implements Command
-{
-
-    @Override
-    public void execute()
-    {
-        // Do nothing, just increment the PC
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Retlw.java

@@ -4,7 +4,7 @@ import de.darkress.pic16f84sim.microcontroller.Memory;
 import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
 import de.darkress.pic16f84sim.microcontroller.Stack;
 
-public class Retlw extends LiteralCommandUtils implements Command
+public class Retlw extends CommandUtils implements Command
 {
     private final int literal;
 
@@ -17,6 +17,8 @@ public class Retlw extends LiteralCommandUtils 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

@@ -3,11 +3,13 @@ package de.darkress.pic16f84sim.commands;
 import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
 import de.darkress.pic16f84sim.microcontroller.Stack;
 
-public class Return extends LiteralCommandUtils implements Command
+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/commands/Rlf.java

@@ -1,35 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Rlf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Rlf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int register = Memory.getRegister(address);
-        int newCarry = register >>7;
-        int oldCarry = Memory.getCarryBit();
-        register = ((register <<1) + oldCarry) & 0xFF;
-
-        if(newCarry == 1)
-        {
-            Memory.setCarryBit();
-        } else if(newCarry == 0){
-            Memory.clearCarryBit();
-        }
-
-        writeToDestination(destinationBit, address, register);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Rrf.java

@@ -1,35 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Rrf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Rrf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int register = Memory.getRegister(address);
-        int newCarry = register & 0x01;
-        int oldCarry = Memory.getCarryBit();
-        register = (oldCarry << 7) + (register >>1);
-
-        if(newCarry == 1)
-        {
-            Memory.setCarryBit();
-        } else if(newCarry == 0){
-            Memory.clearCarryBit();
-        }
-
-        writeToDestination(destinationBit, address, register);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Sublw.java

@@ -2,7 +2,7 @@ package de.darkress.pic16f84sim.commands;
 
 import de.darkress.pic16f84sim.microcontroller.Memory;
 
-public class Sublw extends LiteralCommandUtils implements Command
+public class Sublw extends CommandUtils implements Command
 {
     private final int literal;
 

de/darkress/pic16f84sim/commands/Subwf.java

@@ -1,49 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Subwf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Subwf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    protected void checkCarryBit(int result)
-    {
-        if(result <= 255){
-            Memory.clearCarryBit();
-        } else{
-            Memory.setCarryBit();
-        }
-    }
-
-    @Override
-    protected void checkDigitCarryBit(int literal)
-    {
-        if(((literal & 0x0F) - (Memory.workingRegister & 0x0F)) < 0){
-            Memory.clearDigitCarryBit();
-        } else{
-            Memory.setDigitCarryBit();
-        }
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address) - Memory.workingRegister + 256;
-
-        checkZeroBit(result);
-        checkCarryBit(result);
-        checkDigitCarryBit(Memory.getRegister(address));
-
-        writeToDestination(destinationBit, address, result % 256);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Swapf.java

@@ -1,27 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Swapf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Swapf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = (Memory.getRegister(address) <<4) & 0xF0;
-        int tmp = Memory.getRegister(address) >>4;
-        result += tmp;
-
-        writeToDestination(destinationBit, address, result);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/commands/Xorlw.java

@@ -2,7 +2,7 @@ package de.darkress.pic16f84sim.commands;
 
 import de.darkress.pic16f84sim.microcontroller.Memory;
 
-public class Xorlw extends LiteralCommandUtils implements Command
+public class Xorlw extends CommandUtils implements Command
 {
     private final int literal;
 

de/darkress/pic16f84sim/commands/Xorwf.java

@@ -1,27 +0,0 @@
-package de.darkress.pic16f84sim.commands;
-
-import de.darkress.pic16f84sim.microcontroller.Memory;
-import de.darkress.pic16f84sim.microcontroller.ProgramCounter;
-
-public class Xorwf extends FileRegisterCommandUtils implements Command
-{
-    private final int address;
-    private final boolean destinationBit;
-
-    public Xorwf(int input)
-    {
-        address = input & 0x007F;
-        destinationBit = checkDestinationBit(input);
-    }
-
-    @Override
-    public void execute()
-    {
-        int result = Memory.getRegister(address) ^ Memory.workingRegister;
-
-        checkZeroBit(result);
-
-        writeToDestination(destinationBit, address, result);
-        ProgramCounter.incPC();
-    }
-}

de/darkress/pic16f84sim/decoder/CommandDecoder.java

@@ -9,33 +9,47 @@ public class CommandDecoder
         switch(input & 0x3F00)
         {
             case 0x700:
-                return new Addwf(input);
+                //addwf();
+                break;
             case 0x500:
-                return new Andwf(input);
+                //andwf();
+                break;
             case 0x900:
-                return new Comf(input);
+                //comf();
+                break;
             case 0x300:
-                return new Decf(input);
+                //decf();
+                break;
             case 0xB00:
-                return new Decfsz(input);
+                //decfsz();
+                break;
             case 0xA00:
-                return new Incf(input);
+                //incf();
+                break;
             case 0xF00:
-                return new Incfsz(input);
+                //incfsz();
+                break;
             case 0x400:
-                return new Iorwf(input);
+                //iorwf();
+                break;
             case 0x800:
-                return new Movf(input);
+                //movf();
+                break;
             case 0xD00:
-                return new Rlf(input);
+                //rlf();
+                break;
             case 0xC00:
-                return new Rrf(input);
+                //rrf();
+                break;
             case 0x200:
-                return new Subwf(input);
+                //subwf();
+                break;
             case 0xE00:
-                return new Swapf(input);
+                //swapf();
+                break;
             case 0x600:
-                return new Xorwf(input);
+                //xorwf();
+                break;
             case 0x3900:
                 return new Andlw(input);
             case 0x3800:
@@ -47,17 +61,21 @@ public class CommandDecoder
         switch(input & 0x3F80)
         {
             case 0x180:
-                return new Clrf(input);
+                //clrf();
+                break;
             case 0x100:
-                return new Clrw();
+                //clrw();
+                break;
             case 0x80:
-                return new Movwf(input);
+                //movwf();
+                break;
         }
 
         switch(input & 0x3C00)
         {
             case 0x1000:
-                return new Bcf(input);
+                //bcf();
+                break;
             case 0x1400:
                 //bsf();
                 break;
@@ -97,7 +115,7 @@ public class CommandDecoder
 
         if ((input | 0x0060) == 0x0060)
         {
-            return new Nop();
+            //nop();
         }
 
         if (input == 0x0064)

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()
@@ -153,13 +145,9 @@ public class Memory
         memory[0x03] &= 0xFD;
     }
 
-    public static int getCarryBit()
+    public static boolean getCarryBit()
     {
-        if((memory[0x03] & 0x01) == 0x01)
-        {
-            return 1;
-        }
-        else return 0;
+        return (memory[0x03] & 0x01) == 0x01;
     }
 
     public static void setCarryBit()

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++;
-        Memory.setPCL(pc & 0x00FF);
+        int pcl = Memory.getPCL();
+        int pclath = Memory.getPCLATH();
+        if(pcl == 0xFF)
+        {
+            pclath++;
+            pcl = 0;
+        } else {
+            pcl++;
+        }
+        Memory.setPCL(pcl);
+        Memory.setPCLATH(pclath);
+        pc = (pclath <<8) + pcl;
     }
 }