Factory Integration, NPC improvements. #19 & #31.

Keep backup of old saved files #8

LICENSE

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+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

Plugin Cubot/Plugin Cubot.iml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="Server" />
+    <orderEntry type="library" name="Maven: org.java-websocket:Java-WebSocket:1.3.6" level="project" />
+    <orderEntry type="library" name="Maven: mysql:mysql-connector-java:5.1.42" level="project" />
+    <orderEntry type="library" name="Maven: com.googlecode.json-simple:json-simple:1.1.1" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.10" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
+  </component>
+</module>

Plugin Cubot/pom.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>net.simon987.plugincubot</groupId>
+    <artifactId>plugin-cubot</artifactId>
+    <version>1.2a</version>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>net.simon987.server</groupId>
+            <artifactId>server</artifactId>
+            <version>1.2a</version>
+        </dependency>
+
+
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+    </dependencies>
+
+
+</project>

Plugin Cubot/src/main/java/net/simon987/cubotplugin/Cubot.java

@@ -0,0 +1,204 @@
+package net.simon987.cubotplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.Memory;
+import net.simon987.server.game.*;
+import net.simon987.server.user.User;
+import org.json.simple.JSONObject;
+
+import java.util.ArrayList;
+
+public class Cubot extends GameObject implements Updatable, ControllableUnit {
+
+    private static final char MAP_INFO = 0x0080;
+    public static final int ID = 1;
+
+    private char hologram = 0;
+    private char lastHologram = 0;
+
+    /**
+     * Hit points
+     */
+    private int hp;
+    private int heldItem;
+
+    private Action currentAction = Action.IDLE;
+    private Action lastAction = Action.IDLE;
+
+    private ArrayList<Integer> keyboardBuffer = new ArrayList<>();
+
+    private FloppyDisk floppyDisk;
+
+    private User parent;
+
+    private int energy;
+    private int maxEnergy;
+
+    private static final float SOLAR_PANEL_MULTIPLIER = 1;
+
+    public Cubot() {
+
+    }
+
+    @Override
+    public char getMapInfo() {
+        return MAP_INFO;
+    }
+
+    @Override
+    public void update() {
+
+        storeEnergy((int) (SOLAR_PANEL_MULTIPLIER * GameServer.INSTANCE.getDayNightCycle().getSunIntensity()));
+
+        if (currentAction == Action.WALKING) {
+            if (spendEnergy(100)) {
+                if (!incrementLocation()) {
+                    //Couldn't walk
+                    currentAction = Action.IDLE;
+                }
+            } else {
+                currentAction = Action.IDLE;
+            }
+        }
+
+        /*
+         * CurrentAction is set during the code execution and this function is called right after
+         * If no action as been set, the action sent to the client is the action in currentAction that
+         * was set last tick (IDLE)
+         */
+        lastAction = currentAction;
+        currentAction = Action.IDLE;
+
+        //Same principle for hologram
+        lastHologram = hologram;
+        hologram = 0;
+    }
+
+    @Override
+    public JSONObject serialise() {
+        JSONObject json = new JSONObject();
+        json.put("i", getObjectId());
+        json.put("t", ID);
+        json.put("x", getX());
+        json.put("y", getY());
+        json.put("direction", getDirection().ordinal());
+        json.put("heldItem", heldItem);
+        json.put("hp", hp);
+        json.put("action", lastAction.ordinal());
+        json.put("holo", (int) lastHologram);
+        json.put("energy", energy);
+
+        if (parent != null) {
+            json.put("parent", parent.getUsername()); //Only used client-side for now
+        }
+
+        return json;
+    }
+
+    public static Cubot deserialize(JSONObject json) {
+
+        Cubot cubot = new Cubot();
+        cubot.setObjectId((long) json.get("i"));
+        cubot.setX((int) (long) json.get("x"));
+        cubot.setY((int) (long) json.get("y"));
+        cubot.hp = (int) (long) json.get("hp");
+        cubot.setDirection(Direction.getDirection((int) (long) json.get("direction")));
+        cubot.heldItem = (int) (long) json.get("heldItem");
+        cubot.energy = (int) (long) json.get("energy");
+        cubot.maxEnergy = GameServer.INSTANCE.getConfig().getInt("battery_max_energy");
+
+        return cubot;
+
+    }
+
+    public void setHeldItem(int heldItem) {
+        this.heldItem = heldItem;
+    }
+
+    public int getHeldItem() {
+        return heldItem;
+    }
+
+    @Override
+    public void setKeyboardBuffer(ArrayList<Integer> kbBuffer) {
+        keyboardBuffer = kbBuffer;
+    }
+
+    @Override
+    public ArrayList<Integer> getKeyboardBuffer() {
+        return keyboardBuffer;
+    }
+
+    public void clearKeyboardBuffer() {
+        keyboardBuffer.clear();
+    }
+
+    public void setCurrentAction(Action currentAction) {
+        this.currentAction = currentAction;
+    }
+
+    public User getParent() {
+        return parent;
+    }
+
+    public void setParent(User parent) {
+        this.parent = parent;
+    }
+
+    public Action getAction() {
+        return lastAction;
+    }
+
+    public void setHologram(char hologram) {
+        this.hologram = hologram;
+    }
+
+    public char getHologram() {
+        return lastHologram;
+    }
+
+
+    public int getEnergy() {
+        return energy;
+    }
+
+    public void setEnergy(int energy) {
+        this.energy = energy;
+    }
+
+    public boolean spendEnergy(int spent) {
+
+        if (energy - spent < 0) {
+            return false;
+        } else {
+            energy -= spent;
+            return true;
+        }
+    }
+
+    public void storeEnergy(int qty) {
+
+        energy = Math.min(energy + qty, maxEnergy);
+
+    }
+
+    public void setMaxEnergy(int maxEnergy) {
+        this.maxEnergy = maxEnergy;
+    }
+
+    public int getMaxEnergy() {
+        return maxEnergy;
+    }
+
+    @Override
+    public Memory getFloppyData() {
+
+        CubotFloppyDrive drive = ((CubotFloppyDrive) getParent().getCpu().getHardware(CubotFloppyDrive.DEFAULT_ADDRESS));
+
+        if (drive.getFloppy() != null) {
+            return drive.getFloppy().getMemory();
+        } else {
+            return null;
+        }
+    }
+}

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotBattery.java

@@ -0,0 +1,59 @@
+package net.simon987.cubotplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Status;
+import org.json.simple.JSONObject;
+
+public class CubotBattery extends CpuHardware {
+
+    public static final int DEFAULT_ADDRESS = 0x000A;
+
+    /**
+     * Hardware ID (Should be unique)
+     */
+    public static final char HWID = 0x000A;
+
+    private Cubot cubot;
+    private static final int POLL = 1;
+    private static final int GET_MAX_CAPACITY = 2;
+
+    public CubotBattery(Cubot cubot) {
+        this.cubot = cubot;
+    }
+
+    @Override
+    public void handleInterrupt(Status status) {
+
+        int a = getCpu().getRegisterSet().getRegister("A").getValue();
+
+        if (a == POLL) {
+            getCpu().getRegisterSet().getRegister("B").setValue(cubot.getEnergy());
+
+        } else if (a == GET_MAX_CAPACITY) {
+            getCpu().getRegisterSet().getRegister("B").setValue(cubot.getMaxEnergy());
+        } else if (a == 0xFFFF) {
+            cubot.setEnergy(cubot.getMaxEnergy());
+        }
+
+    }
+
+    @Override
+    public char getId() {
+        return HWID;
+    }
+
+    @Override
+    public JSONObject serialise() {
+        JSONObject json = new JSONObject();
+        json.put("hwid", (int) HWID);
+        json.put("cubot", cubot.getObjectId());
+
+        return json;
+    }
+
+    public static CubotBattery deserialize(JSONObject hwJSON) {
+        return new CubotBattery((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
+    }
+
+}

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotDrill.java

@@ -3,6 +3,7 @@ package net.simon987.cubotplugin;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
+import net.simon987.server.game.Action;
 import net.simon987.server.game.TileMap;
 import org.json.simple.JSONObject;
 
@@ -40,19 +41,19 @@ public class CubotDrill extends CpuHardware {
 
         } else if (a == GATHER_SLOW || a == GATHER_FAST) {
 
-            if (cubot.getAction() != CubotAction.IDLE) {
-                int tile = cubot.getWorld().getTileMap().getTileAt(cubot.getX(), cubot.getY());
+            if (cubot.spendEnergy(1400)) {
+                if (cubot.getAction() == Action.IDLE) {
+                    int tile = cubot.getWorld().getTileMap().getTileAt(cubot.getX(), cubot.getY());
 
-                if (tile == TileMap.IRON_TILE) {
-                    cubot.setHeldItem(TileMap.ITEM_IRON);
-                    cubot.setCurrentAction(CubotAction.DIGGING);
+                    if (tile == TileMap.IRON_TILE) {
+                        cubot.setHeldItem(TileMap.ITEM_IRON);
+                        cubot.setCurrentAction(Action.DIGGING);
 
-                } else if (tile == TileMap.COPPER_TILE) {
-                    cubot.setHeldItem(TileMap.ITEM_COPPER);
-                    cubot.setCurrentAction(CubotAction.DIGGING);
+                    } else if (tile == TileMap.COPPER_TILE) {
+                        cubot.setHeldItem(TileMap.ITEM_COPPER);
+                        cubot.setCurrentAction(Action.DIGGING);
 
-                } else {
-                    //System.out.println("FAILED: dig");
+                    }
                 }
             }
 
@@ -69,7 +70,7 @@ public class CubotDrill extends CpuHardware {
         return json;
     }
 
-    public static CubotDrill deserialize(JSONObject hwJSON){
-        return new CubotDrill((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int)(long)hwJSON.get("cubot")));
+    public static CubotDrill deserialize(JSONObject hwJSON) {
+        return new CubotDrill((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotFloppyDrive.java

@@ -0,0 +1,107 @@
+package net.simon987.cubotplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Status;
+import org.json.simple.JSONObject;
+
+public class CubotFloppyDrive extends CpuHardware {
+
+    /**
+     * Hardware ID (Should be unique)
+     */
+    static final char HWID = 0x000B;
+
+    public static final int DEFAULT_ADDRESS = 0x000B;
+
+    private static final int POLL = 1;
+    private static final int READ_SECTOR = 2;
+    private static final int WRITE_SECTOR = 3;
+
+    private Cubot cubot;
+    private FloppyDisk floppyDisk;
+
+    public CubotFloppyDrive(Cubot cubot) {
+        this.cubot = cubot;
+
+        floppyDisk = new FloppyDisk();
+    }
+
+    @Override
+    public void handleInterrupt(Status status) {
+        int a = getCpu().getRegisterSet().getRegister("A").getValue();
+
+        if (a == POLL) {
+
+            if (floppyDisk != null) {
+                getCpu().getRegisterSet().getRegister("B").setValue(0);
+            } else {
+                getCpu().getRegisterSet().getRegister("B").setValue(1);
+            }
+
+        } else if (a == READ_SECTOR) {
+
+            if (floppyDisk == null) {
+                getCpu().getRegisterSet().getRegister("B").setValue(0);
+            } else {
+                if (cubot.spendEnergy(1)) {
+                    getCpu().getRegisterSet().getRegister("B").setValue(1);
+
+                    int x = getCpu().getRegisterSet().getRegister("X").getValue();
+                    int y = getCpu().getRegisterSet().getRegister("Y").getValue();
+
+                    floppyDisk.readSector(x, cubot.getParent().getCpu().getMemory(), y);
+                }
+            }
+
+
+        } else if (a == WRITE_SECTOR) {
+            if (floppyDisk == null) {
+                getCpu().getRegisterSet().getRegister("B").setValue(0);
+            } else {
+                if (cubot.spendEnergy(1)) {
+                    getCpu().getRegisterSet().getRegister("B").setValue(1);
+
+                    int x = getCpu().getRegisterSet().getRegister("X").getValue();
+                    int y = getCpu().getRegisterSet().getRegister("Y").getValue();
+
+                    floppyDisk.writeSector(x, cubot.getParent().getCpu().getMemory(), y);
+                }
+            }
+        }
+
+    }
+
+    @Override
+    public char getId() {
+        return HWID;
+    }
+
+    @Override
+    public JSONObject serialise() {
+        JSONObject json = new JSONObject();
+        json.put("hwid", (int) HWID);
+        json.put("cubot", cubot.getObjectId());
+
+        if (floppyDisk != null) {
+            json.put("floppy", floppyDisk.serialise());
+        }
+
+        return json;
+    }
+
+    public static CubotFloppyDrive deserialize(JSONObject hwJSON) {
+
+        CubotFloppyDrive drive = new CubotFloppyDrive((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
+
+        if (hwJSON.containsKey("floppy")) {
+            drive.floppyDisk = FloppyDisk.deserialise((JSONObject) hwJSON.get("floppy"));
+        }
+
+        return drive;
+    }
+
+    public FloppyDisk getFloppy() {
+        return floppyDisk;
+    }
+}

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotHologram.java

@@ -0,0 +1,49 @@
+package net.simon987.cubotplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Status;
+import org.json.simple.JSONObject;
+
+public class CubotHologram extends CpuHardware {
+
+
+    /**
+     * Hardware ID (Should be unique)
+     */
+    static final char HWID = 0x0009;
+
+    public static final int DEFAULT_ADDRESS = 9;
+
+    private Cubot cubot;
+
+    public CubotHologram(Cubot cubot) {
+        this.cubot = cubot;
+    }
+
+    @Override
+    public void handleInterrupt(Status status) {
+
+        char a = getCpu().getRegisterSet().getRegister("A").getValue();
+        cubot.setHologram(a);
+
+    }
+
+    @Override
+    public char getId() {
+        return HWID;
+    }
+
+    public static CubotHologram deserialize(JSONObject hwJSON) {
+        return new CubotHologram((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
+    }
+
+    @Override
+    public JSONObject serialise() {
+        JSONObject json = new JSONObject();
+        json.put("hwid", (int) HWID);
+        json.put("cubot", cubot.getObjectId());
+
+        return json;
+    }
+}

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotInventory.java

@@ -33,12 +33,14 @@ public class CubotInventory extends CpuHardware {
 
         int a = getCpu().getRegisterSet().getRegister("A").getValue();
 
-        if(a == POLL) {
+        if (a == POLL) {
 
             getCpu().getRegisterSet().getRegister("B").setValue(cubot.getHeldItem());
 
         } else if (a == CLEAR) {
-            cubot.setHeldItem(0);
+            if (cubot.spendEnergy(100)) {
+                cubot.setHeldItem(0);
+            }
         }
 
     }
@@ -53,7 +55,7 @@ public class CubotInventory extends CpuHardware {
         return json;
     }
 
-    public static CubotInventory deserialize(JSONObject hwJSON){
-        return new CubotInventory((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int)(long)hwJSON.get("cubot")));
+    public static CubotInventory deserialize(JSONObject hwJSON) {
+        return new CubotInventory((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotLaser.java

@@ -3,6 +3,7 @@ package net.simon987.cubotplugin;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
+import net.simon987.server.game.Action;
 import net.simon987.server.game.GameObject;
 import net.simon987.server.game.InventoryHolder;
 import org.json.simple.JSONObject;
@@ -22,6 +23,7 @@ public class CubotLaser extends CpuHardware {
     private Cubot cubot;
 
     private static final int WITHDRAW = 1;
+    private static final int DEPOSIT = 2;
 
 
     public CubotLaser(Cubot cubot) {
@@ -40,35 +42,31 @@ public class CubotLaser extends CpuHardware {
         int b = getCpu().getRegisterSet().getRegister("B").getValue();
 
 
-        if(a == WITHDRAW) {
+        if (a == WITHDRAW) {
 
-            //System.out.println("withdraw");
 
             Point frontTile = cubot.getFrontTile();
             ArrayList<GameObject> objects = cubot.getWorld().getGameObjectsAt(frontTile.x, frontTile.y);
 
 
-            if (cubot.getAction() != CubotAction.IDLE && objects.size() > 0) {
-
+            if (cubot.getAction() != Action.IDLE && objects.size() > 0) {
+                //FIXME: Problem here if more than 1 object
                 if (objects.get(0) instanceof InventoryHolder) {
-                    //Take the item
-                    if (((InventoryHolder) objects.get(0)).takeItem(b)) {
+                    if (((InventoryHolder) objects.get(0)).canTakeItem(b)) {
+                        if (cubot.spendEnergy(30)) {
+                            //Take the item
+                            ((InventoryHolder) objects.get(0)).takeItem(b);
 
-                        cubot.setHeldItem(b);
-                        //System.out.println("took " + b);
-                        cubot.setCurrentAction(CubotAction.WITHDRAWING);
-
-                    } else {
-                        //The inventory holder can't provide this item
-                        //todo Add emote here
-                        //  System.out.println("DEBUG: FAILED: take (The inventory holder can't provide this item)");
+                            cubot.setHeldItem(b);
+                            cubot.setCurrentAction(Action.WITHDRAWING);
+                        }
                     }
-
                 }
-            } else {
-                //Nothing in front
-                //    System.out.println("DEBUG: FAILED: take (Nothing in front or Cubot is busy)");
             }
+
+
+        } else if (a == DEPOSIT) {
+
         }
 
     }
@@ -83,7 +81,7 @@ public class CubotLaser extends CpuHardware {
         return json;
     }
 
-    public static CubotLaser deserialize(JSONObject hwJSON){
-        return new CubotLaser((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int)(long)hwJSON.get("cubot")));
+    public static CubotLaser deserialize(JSONObject hwJSON) {
+        return new CubotLaser((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotLeg.java

@@ -3,6 +3,7 @@ package net.simon987.cubotplugin;
 import net.simon987.server.GameServer;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.assembly.Status;
+import net.simon987.server.game.Action;
 import net.simon987.server.game.Direction;
 import net.simon987.server.io.JSONSerialisable;
 import org.json.simple.JSONObject;
@@ -37,30 +38,33 @@ public class CubotLeg extends CpuHardware implements JSONSerialisable {
         int a = getCpu().getRegisterSet().getRegister("A").getValue();
         int b = getCpu().getRegisterSet().getRegister("B").getValue();
 
-        if(a == SET_DIR){
+        if (a == SET_DIR) {
+
 
             Direction dir = Direction.getDirection(b);
 
-            if(dir != null){
+            if (dir != null) {
+                if (cubot.spendEnergy(20)) {
+                    cubot.setDirection(Direction.getDirection(b));
+                    status.setErrorFlag(false);
+                }
+            } else {
+                status.setErrorFlag(true);
+            }
+
+
+        } else if (a == SET_DIR_AND_WALK) {
+
+            Direction dir = Direction.getDirection(b);
+
+            if (dir != null) {
                 cubot.setDirection(Direction.getDirection(b));
                 status.setErrorFlag(false);
             } else {
                 status.setErrorFlag(true);
             }
 
-
-        } else if(a == SET_DIR_AND_WALK){
-
-            Direction dir = Direction.getDirection(b);
-
-            if(dir != null){
-                cubot.setDirection(Direction.getDirection(b));
-                status.setErrorFlag(false);
-            } else {
-                status.setErrorFlag(true);
-            }
-
-            cubot.setCurrentAction(CubotAction.WALKING);
+            cubot.setCurrentAction(Action.WALKING);
         }
     }
 
@@ -74,8 +78,8 @@ public class CubotLeg extends CpuHardware implements JSONSerialisable {
         return json;
     }
 
-    public static CubotLeg deserialize(JSONObject hwJSON){
-        return new CubotLeg((Cubot)GameServer.INSTANCE.getGameUniverse().getObject((int)(long)hwJSON.get("cubot")));
+    public static CubotLeg deserialize(JSONObject hwJSON) {
+        return new CubotLeg((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
     }
 
 

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotLidar.java

@@ -0,0 +1,147 @@
+package net.simon987.cubotplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Memory;
+import net.simon987.server.assembly.Status;
+import net.simon987.server.game.World;
+import net.simon987.server.game.pathfinding.Node;
+import net.simon987.server.game.pathfinding.Pathfinder;
+import net.simon987.server.io.JSONSerialisable;
+import net.simon987.server.logging.LogManager;
+import org.json.simple.JSONObject;
+
+import java.util.ArrayList;
+
+public class CubotLidar extends CpuHardware implements JSONSerialisable {
+
+    /**
+     * Hardware ID (Should be unique)
+     */
+    public static final char HWID = 0x0003;
+
+    public static final int DEFAULT_ADDRESS = 3;
+
+    private Cubot cubot;
+
+    private static final int GET_POS = 1;
+    private static final int GET_PATH = 2;
+    private static final int GET_MAP = 3;
+    private static final int GET_WORLD_POS = 4;
+
+    private static final int MEMORY_MAP_START = 0x0100;
+    private static final int MEMORY_PATH_START = 0x0000;
+
+    public CubotLidar(Cubot cubot) {
+        this.cubot = cubot;
+    }
+
+
+    @Override
+    public char getId() {
+        return HWID;
+    }
+
+    @Override
+    public void handleInterrupt(Status status) {
+
+        int a = getCpu().getRegisterSet().getRegister("A").getValue();
+
+        switch (a) {
+            case GET_POS:
+                getCpu().getRegisterSet().getRegister("X").setValue(cubot.getX());
+                getCpu().getRegisterSet().getRegister("Y").setValue(cubot.getY());
+                break;
+            case GET_PATH:
+                if (cubot.spendEnergy(50)) {
+                    int b = getCpu().getRegisterSet().getRegister("B").getValue();
+                    int destX = getCpu().getRegisterSet().getRegister("X").getValue();
+                    int destY = getCpu().getRegisterSet().getRegister("Y").getValue();
+
+                    //Get path
+                    ArrayList<Node> nodes = Pathfinder.findPath(cubot.getWorld(), cubot.getX(), cubot.getY(),
+                            destX, destY, b);
+
+                    //Write to memory
+                    Memory mem = getCpu().getMemory();
+
+                    int counter = MEMORY_PATH_START;
+
+                    if (nodes != null) {
+
+                        Node lastNode = null;
+
+                        for (Node n : nodes) {
+                            //Store the path as a sequence of directions
+
+                            if (lastNode == null) {
+                                lastNode = n;
+                                continue;
+                            }
+
+                            if (n.x < lastNode.x) {
+                                //West
+                                mem.set(counter++, 3);
+                            } else if (n.x > lastNode.x) {
+                                //East
+                                mem.set(counter++, 1);
+                            } else if (n.y < lastNode.y) {
+                                //North
+                                mem.set(counter++, 0);
+                            } else if (n.y > lastNode.y) {
+                                //South
+                                mem.set(counter++, 2);
+                            }
+
+                            lastNode = n;
+                        }
+
+                        //Indicate end of path with 0xAAAA
+                        mem.set(counter, 0xAAAA);
+                    } else {
+                        //Indicate invalid path 0xFFFF
+                        mem.set(counter, 0xFFFF);
+                    }
+
+                    LogManager.LOGGER.fine("DEBUG: path to" + destX + "," + destY);
+                }
+
+                break;
+
+            case GET_MAP:
+                if (cubot.spendEnergy(10)) {
+                    char[][] mapInfo = cubot.getWorld().getMapInfo();
+
+                    int i = MEMORY_MAP_START;
+                    for (int y = 0; y < World.WORLD_SIZE; y++) {
+                        for (int x = 0; x < World.WORLD_SIZE; x++) {
+                            getCpu().getMemory().set(i++, mapInfo[x][y]);
+                        }
+                    }
+                }
+
+                break;
+            case GET_WORLD_POS:
+                getCpu().getRegisterSet().getRegister("X").setValue(cubot.getWorld().getX());
+                getCpu().getRegisterSet().getRegister("Y").setValue(cubot.getWorld().getY());
+                break;
+
+        }
+
+
+    }
+
+    @Override
+    public JSONObject serialise() {
+
+        JSONObject json = new JSONObject();
+        json.put("hwid", (int) HWID);
+        json.put("cubot", cubot.getObjectId());
+
+        return json;
+    }
+
+    public static CubotLidar deserialize(JSONObject hwJSON) {
+        return new CubotLidar((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
+    }
+}

Plugin Cubot/src/main/java/net/simon987/cubotplugin/CubotPlugin.java

@@ -2,6 +2,7 @@ package net.simon987.cubotplugin;
 
 import net.simon987.cubotplugin.event.CpuInitialisationListener;
 import net.simon987.cubotplugin.event.UserCreationListener;
+import net.simon987.server.ServerConfiguration;
 import net.simon987.server.assembly.CpuHardware;
 import net.simon987.server.game.GameObject;
 import net.simon987.server.io.CpuHardwareDeserializer;
@@ -10,11 +11,11 @@ import net.simon987.server.logging.LogManager;
 import net.simon987.server.plugin.ServerPlugin;
 import org.json.simple.JSONObject;
 
-public class CubotPlugin extends ServerPlugin implements GameObjectDeserializer, CpuHardwareDeserializer{
+public class CubotPlugin extends ServerPlugin implements GameObjectDeserializer, CpuHardwareDeserializer {
 
 
     @Override
-    public void init() {
+    public void init(ServerConfiguration config) {
         listeners.add(new CpuInitialisationListener());
         listeners.add(new UserCreationListener());
 
@@ -24,9 +25,9 @@ public class CubotPlugin extends ServerPlugin implements GameObjectDeserializer,
     @Override
     public GameObject deserializeObject(JSONObject object) {
 
-        int objType = (int)(long)object.get("type");
+        int objType = (int) (long) object.get("t");
 
-        if(objType == Cubot.ID) {
+        if (objType == Cubot.ID) {
 
             return Cubot.deserialize(object);
         }
@@ -36,9 +37,9 @@ public class CubotPlugin extends ServerPlugin implements GameObjectDeserializer,
 
     @Override
     public CpuHardware deserializeHardware(JSONObject hwJson) {
-        int hwid = (int)(long)hwJson.get("hwid");
+        int hwid = (int) (long) hwJson.get("hwid");
 
-        switch (hwid){
+        switch (hwid) {
             case CubotLeg.HWID:
                 return CubotLeg.deserialize(hwJson);
             case CubotLaser.HWID:
@@ -51,6 +52,12 @@ public class CubotPlugin extends ServerPlugin implements GameObjectDeserializer,
                 return CubotInventory.deserialize(hwJson);
             case Keyboard.HWID:
                 return Keyboard.deserialize(hwJson);
+            case CubotHologram.HWID:
+                return CubotHologram.deserialize(hwJson);
+            case CubotBattery.HWID:
+                return CubotBattery.deserialize(hwJson);
+            case CubotFloppyDrive.HWID:
+                return CubotFloppyDrive.deserialize(hwJson);
         }
 
         return null;

Plugin Cubot/src/main/java/net/simon987/cubotplugin/FloppyDisk.java

@@ -0,0 +1,109 @@
+package net.simon987.cubotplugin;
+
+
+import net.simon987.server.assembly.Memory;
+import net.simon987.server.io.JSONSerialisable;
+import org.json.simple.JSONObject;
+
+/**
+ * Represents a floppy disk that is inside a floppy drive.
+ * Floppies contains 80 tracks with 18 sectors per track.
+ * That's 1440 sectors of 512 words. (total 1,474,560 bytes / 737,280 words / 1.44Mb)
+ */
+public class FloppyDisk implements JSONSerialisable {
+
+    /**
+     * Contents of the disk
+     */
+    private Memory memory;
+
+    /**
+     * Current location of the read/write head.
+     * Used to calculate seek time
+     */
+    private int rwHeadTrack = 0;
+
+
+    public FloppyDisk() {
+        this.memory = new Memory(512 * 1440);
+    }
+
+    /**
+     * Read 512 words from the specified sector to cpu memory at specified address
+     *
+     * @param sector     sector to read (0-1440)
+     * @param cpuMemory  Cpu memory to write to
+     * @param ramAddress address of the data to write in CPU memory
+     * @return Whether or not the read operation was in the same track as the last r/w
+     */
+    public boolean readSector(int sector, Memory cpuMemory, int ramAddress) {
+
+        if (sector <= 1440) {
+            cpuMemory.write(ramAddress, memory.getWords(), sector * 512, 512);
+
+            //Calculate seek time
+            int deltaTrack = (sector / 80) - rwHeadTrack;
+
+            if (deltaTrack != 0) {
+                rwHeadTrack = (sector / 80);
+                return false;
+            } else {
+                return true;
+            }
+        }
+        return false;
+
+    }
+
+    /**
+     * Write 512 words to the specified sector from cpu memory at the specified address
+     *
+     * @param sector     sector to write (0-1440)
+     * @param cpuMemory  Cpu memory to read from
+     * @param ramAddress address of the data to read in CPU memory
+     * @return Whether or not the read operation was in the same track as the last r/w
+     */
+    public boolean writeSector(int sector, Memory cpuMemory, int ramAddress) {
+
+        if (sector <= 1440) {
+            memory.write(sector * 512, cpuMemory.getWords(), ramAddress, 512);
+
+            //Calculate seek time
+            int deltaTrack = (sector / 80) - rwHeadTrack;
+
+            if (deltaTrack != 0) {
+                rwHeadTrack = (sector / 80);
+                return false;
+            } else {
+                return true;
+            }
+        } else {
+            return false;
+        }
+    }
+
+
+    @Override
+    public JSONObject serialise() {
+
+        JSONObject json = new JSONObject();
+        json.put("rwHeadTrack", rwHeadTrack);
+        json.put("memory", memory.serialise());
+
+        return json;
+    }
+
+    public static FloppyDisk deserialise(JSONObject json) {
+
+        FloppyDisk floppyDisk = new FloppyDisk();
+
+        floppyDisk.rwHeadTrack = (int) (long) json.get("rwHeadTrack");
+        floppyDisk.memory = Memory.deserialize((JSONObject) json.get("memory"));
+
+        return floppyDisk;
+    }
+
+    public Memory getMemory() {
+        return memory;
+    }
+}

Plugin Cubot/src/main/java/net/simon987/cubotplugin/Keyboard.java

@@ -9,12 +9,9 @@ public class Keyboard extends CpuHardware {
 
     public static final int DEFAULT_ADDRESS = 4;
 
-    public static final String NAME = "Wireless Keyboard";
-
-
     private static final int CLEAR_BUFFER = 0;
     private static final int FETCH_KEY = 1;
-    
+
     /**
      * Hardware ID (Should be unique)
      */
@@ -36,14 +33,14 @@ public class Keyboard extends CpuHardware {
 
         int a = getCpu().getRegisterSet().getRegister("A").getValue();
 
-        if(a == CLEAR_BUFFER){
+        if (a == CLEAR_BUFFER) {
 
             cubot.clearKeyboardBuffer();
 
-        } else if (a == FETCH_KEY){
+        } else if (a == FETCH_KEY) {
             //pop
             int key = 0;
-            if(cubot.getKeyboardBuffer().size() > 0){
+            if (cubot.getKeyboardBuffer().size() > 0) {
                 key = cubot.getKeyboardBuffer().get(0);
                 cubot.getKeyboardBuffer().remove(0);
             }
@@ -64,7 +61,7 @@ public class Keyboard extends CpuHardware {
         return json;
     }
 
-    public static Keyboard deserialize(JSONObject hwJSON){
-        return new Keyboard((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int)(long)hwJSON.get("cubot")));
+    public static Keyboard deserialize(JSONObject hwJSON) {
+        return new Keyboard((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/event/CpuInitialisationListener.java

@@ -18,8 +18,8 @@ public class CpuInitialisationListener implements GameEventListener {
     public void handle(GameEvent event) {
         LogManager.LOGGER.fine("(Plugin) Handled CPU Initialisation event (Cubot Plugin)");
 
-        CPU cpu = (CPU)event.getSource();
-        User user = ((CpuInitialisationEvent)event).getUser();
+        CPU cpu = (CPU) event.getSource();
+        User user = ((CpuInitialisationEvent) event).getUser();
 
         CubotLeg legHw = new CubotLeg((Cubot) user.getControlledUnit());
         legHw.setCpu(cpu);
@@ -33,6 +33,12 @@ public class CpuInitialisationListener implements GameEventListener {
         drillHw.setCpu(cpu);
         CubotInventory invHw = new CubotInventory((Cubot) user.getControlledUnit());
         invHw.setCpu(cpu);
+        CubotHologram emoteHw = new CubotHologram((Cubot) user.getControlledUnit());
+        emoteHw.setCpu(cpu);
+        CubotBattery batteryHw = new CubotBattery((Cubot) user.getControlledUnit());
+        batteryHw.setCpu(cpu);
+        CubotFloppyDrive floppyHw = new CubotFloppyDrive((Cubot) user.getControlledUnit());
+        floppyHw.setCpu(cpu);
 
         cpu.attachHardware(legHw, CubotLeg.DEFAULT_ADDRESS);
         cpu.attachHardware(laserHw, CubotLaser.DEFAULT_ADDRESS);
@@ -40,5 +46,9 @@ public class CpuInitialisationListener implements GameEventListener {
         cpu.attachHardware(keyboard, Keyboard.DEFAULT_ADDRESS);
         cpu.attachHardware(drillHw, CubotDrill.DEFAULT_ADDRESS);
         cpu.attachHardware(invHw, CubotInventory.DEFAULT_ADDRESS);
+        cpu.attachHardware(invHw, CubotInventory.DEFAULT_ADDRESS);
+        cpu.attachHardware(emoteHw, CubotHologram.DEFAULT_ADDRESS);
+        cpu.attachHardware(batteryHw, CubotBattery.DEFAULT_ADDRESS);
+        cpu.attachHardware(floppyHw, CubotFloppyDrive.DEFAULT_ADDRESS);
     }
 }

Plugin Cubot/src/main/java/net/simon987/cubotplugin/event/UserCreationListener.java

@@ -19,7 +19,7 @@ public class UserCreationListener implements GameEventListener {
     @Override
     public void handle(GameEvent event) {
 
-        User user = (User)event.getSource();
+        User user = (User) event.getSource();
 
         LogManager.LOGGER.fine("(Plugin) Handled User creation event (Cubot Plugin)");
 
@@ -29,11 +29,15 @@ public class UserCreationListener implements GameEventListener {
                 GameServer.INSTANCE.getConfig().getInt("new_user_worldX"),
                 GameServer.INSTANCE.getConfig().getInt("new_user_worldY")));
         cubot.getWorld().getGameObjects().add(cubot);
+        cubot.getWorld().incUpdatable();
 
         cubot.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
 
         cubot.setHeldItem(GameServer.INSTANCE.getConfig().getInt("new_user_item"));
 
+        cubot.setEnergy(GameServer.INSTANCE.getConfig().getInt("battery_max_energy"));
+        cubot.setMaxEnergy(GameServer.INSTANCE.getConfig().getInt("battery_max_energy"));
+
         cubot.setParent(user);
 
         Point point = cubot.getWorld().getRandomPassableTile();

Plugin Cubot/src/net/simon987/cubotplugin/Cubot.java

@@ -1,131 +0,0 @@
-package net.simon987.cubotplugin;
-
-import net.simon987.server.game.*;
-import net.simon987.server.user.User;
-import org.json.simple.JSONObject;
-
-import java.util.ArrayList;
-
-public class Cubot extends GameObject implements Updatable, ControllableUnit {
-
-    private static final char MAP_INFO = 0x0080;
-    public static final int ID = 1;
-
-    private EffectType currentEmote = null;
-
-    /**
-     * Hit points
-     */
-    private int hp;
-    private int heldItem;
-
-    private CubotAction currentAction = CubotAction.IDLE;
-    private CubotAction lastAction = CubotAction.IDLE;
-
-    private ArrayList<Integer> keyboardBuffer = new ArrayList<>();
-
-    private User parent;
-
-    public Cubot() {
-
-    }
-
-    @Override
-    public char getMapInfo() {
-        return MAP_INFO;
-    }
-
-    @Override
-    public void update() {
-
-        if (currentAction == CubotAction.WALKING) {
-            if (!incrementLocation()) {
-                //Couldn't walk
-                currentAction = CubotAction.IDLE;
-            }
-        }
-
-        if (currentEmote != null) {
-           // getWorld().getQueuedGameEffects().add(new GameEffect(currentEmote, getX(), getY()));
-            currentEmote = null;
-        }
-
-        /*
-         * CurrentAction is set during the code execution and this function is called right after
-         * If no action as been set, the action sent to the client is the action in currentAction that
-         * was set last tick (IDLE)
-         */
-        lastAction = currentAction;
-        currentAction = CubotAction.IDLE;
-    }
-
-    @Override
-    public JSONObject serialise() {
-        JSONObject json = new JSONObject();
-        json.put("id", getObjectId());
-        json.put("type", ID);
-        json.put("x", getX());
-        json.put("y", getY());
-        json.put("direction", getDirection().ordinal());
-        json.put("heldItem", heldItem);
-        json.put("hp", hp);
-        json.put("action", lastAction.ordinal());
-        if (parent != null) {
-            json.put("parent", parent.getUsername()); //Only used client-side for now
-        }
-
-        return json;
-    }
-
-    public static Cubot deserialize(JSONObject json) {
-
-        Cubot cubot = new Cubot();
-        cubot.setObjectId((int)(long)json.get("id"));
-        cubot.setX((int)(long)json.get("x"));
-        cubot.setY((int)(long)json.get("y"));
-        cubot.hp = (int)(long)json.get("hp");
-        cubot.setDirection(Direction.getDirection((int)(long)json.get("direction")));
-        cubot.heldItem = (int)(long)json.get("heldItem");
-
-        return cubot;
-
-    }
-
-    public void setHeldItem(int heldItem) {
-        this.heldItem = heldItem;
-    }
-
-    public int getHeldItem() {
-        return heldItem;
-    }
-
-    @Override
-    public void setKeyboardBuffer(ArrayList<Integer> kbBuffer) {
-        keyboardBuffer = kbBuffer;
-    }
-
-    @Override
-    public ArrayList<Integer> getKeyboardBuffer() {
-        return keyboardBuffer;
-    }
-
-    public void clearKeyboardBuffer(){
-        keyboardBuffer.clear();
-    }
-
-    public void setCurrentAction(CubotAction currentAction) {
-        this.currentAction = currentAction;
-    }
-
-    public User getParent() {
-        return parent;
-    }
-
-    public void setParent(User parent) {
-        this.parent = parent;
-    }
-
-    public CubotAction getAction() {
-        return lastAction;
-    }
-}

Plugin Cubot/src/net/simon987/cubotplugin/CubotLidar.java

@@ -1,141 +0,0 @@
-package net.simon987.cubotplugin;
-
-import net.simon987.server.GameServer;
-import net.simon987.server.assembly.CpuHardware;
-import net.simon987.server.assembly.Status;
-import net.simon987.server.game.World;
-import net.simon987.server.game.pathfinding.Node;
-import net.simon987.server.game.pathfinding.Pathfinder;
-import net.simon987.server.io.JSONSerialisable;
-import net.simon987.server.logging.LogManager;
-import org.json.simple.JSONObject;
-
-import java.util.ArrayList;
-
-public class CubotLidar extends CpuHardware implements JSONSerialisable {
-
-    /**
-     * Hardware ID (Should be unique)
-     */
-    public static final char HWID = 0x0003;
-
-    public static final int DEFAULT_ADDRESS = 3;
-
-    private Cubot cubot;
-
-    private static final int GET_POS = 1;
-    private static final int GET_PATH = 2;
-    private static final int GET_MAP = 3;
-
-    private static final int MEMORY_MAP_START = 0x0100;
-    private static final int MEMORY_PATH_START = 0x0000;
-
-    public CubotLidar(Cubot cubot) {
-        this.cubot = cubot;
-    }
-
-
-    @Override
-    public char getId() {
-        return HWID;
-    }
-
-    @Override
-    public void handleInterrupt(Status status) {
-
-        int a = getCpu().getRegisterSet().getRegister("A").getValue();
-
-        switch (a){
-            case GET_POS:
-                getCpu().getRegisterSet().getRegister("X").setValue(cubot.getX());
-                getCpu().getRegisterSet().getRegister("Y").setValue(cubot.getY());
-                break;
-            case GET_PATH:
-                int b = getCpu().getRegisterSet().getRegister("B").getValue();
-                int destX = getCpu().getRegisterSet().getRegister("X").getValue();
-                int destY = getCpu().getRegisterSet().getRegister("Y").getValue();
-
-                //Get path
-                ArrayList<Node> nodes = Pathfinder.findPath(cubot.getWorld(), cubot.getX(), cubot.getY(),
-                        destX, destY, b);
-
-//                System.out.println(nodes.size() + " nodes");
-
-                //Write to memory
-                byte[] mem = getCpu().getMemory().getBytes();
-
-                int counter = 0; //todo get memory address from config/constant
-
-                if (nodes != null) {
-
-                    Node lastNode = null;
-
-                    for (Node n : nodes) {
-                        //Store the path as a sequence of directions
-
-                        if (lastNode == null) {
-                            lastNode = n;
-                            continue;
-                        }
-
-                        if (n.x < lastNode.x) {
-                            //West
-                            mem[counter++] = 0;
-                            mem[counter++] = 3;
-                        } else if (n.x > lastNode.x) {
-                            //East
-                            mem[counter++] = 0;
-                            mem[counter++] = 1;
-                        } else if (n.y < lastNode.y) {
-                            //North
-                            mem[counter++] = 0;
-                            mem[counter++] = 0;
-                        } else if (n.y > lastNode.y) {
-                            //South
-                            mem[counter++] = 0;
-                            mem[counter++] = 2;
-                        }
-
-                        lastNode = n;
-                    }
-
-                    //Indicate end of path with 0xAAAA
-                    mem[counter++] = -86;
-                    mem[counter] = -86;
-                } else {
-                    //Indicate invalid path 0xFFFF
-                    mem[counter++] = -1;
-                    mem[counter] = -1;
-                }
-
-                LogManager.LOGGER.fine("DEBUG: path to" + destX + "," + destY);
-                break;
-
-            case GET_MAP:
-                char[][] mapInfo = cubot.getWorld().getMapInfo();
-
-                int i = MEMORY_MAP_START;
-                for (int y = 0; y < World.WORLD_SIZE; y++) {
-                    for (int x = 0; x < World.WORLD_SIZE; x++) {
-                        getCpu().getMemory().set(i++, mapInfo[x][y]);
-                    }
-                }
-        }
-
-
-    }
-
-    @Override
-    public JSONObject serialise() {
-
-        JSONObject json = new JSONObject();
-        json.put("hwid", (int) HWID);
-        json.put("cubot", cubot.getObjectId());
-
-        return json;
-    }
-
-    public static CubotLidar deserialize(JSONObject hwJSON) {
-        return new CubotLidar((Cubot) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) hwJSON.get("cubot")));
-    }
-}

Plugin Kiln/plugin.properties

@@ -1,3 +0,0 @@
-classpath=net.simon987.kilnplugin.KilnPlugin
-name=Kiln Plugin
-version=1.0

Plugin Kiln/src/net/simon987/kilnplugin/KilnPlugin.java

@@ -1,21 +0,0 @@
-package net.simon987.kilnplugin;
-
-import net.simon987.server.game.GameObject;
-import net.simon987.server.io.GameObjectDeserializer;
-import net.simon987.server.plugin.ServerPlugin;
-import org.json.simple.JSONObject;
-
-public class KilnPlugin extends ServerPlugin implements GameObjectDeserializer {
-
-
-
-    @Override
-    public void init() {
-
-    }
-
-    @Override
-    public GameObject deserializeObject(JSONObject object) {
-        return null;
-    }
-}

Plugin Misc HW/Plugin Misc HW.iml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="Server" />
+    <orderEntry type="library" name="Maven: org.java-websocket:Java-WebSocket:1.3.6" level="project" />
+    <orderEntry type="library" name="Maven: mysql:mysql-connector-java:5.1.42" level="project" />
+    <orderEntry type="library" name="Maven: com.googlecode.json-simple:json-simple:1.1.1" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.10" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
+  </component>
+</module>

Plugin Misc HW/pom.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>net.simon987.pluginmischw</groupId>
+    <artifactId>plugin-misc-hw</artifactId>
+    <version>1.2a</version>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>net.simon987.server</groupId>
+            <artifactId>server</artifactId>
+            <version>1.2a</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+
+    </dependencies>
+
+</project>

Plugin Misc HW/src/main/java/net/simon987/mischwplugin/Clock.java

@@ -0,0 +1,42 @@
+package net.simon987.mischwplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Status;
+import net.simon987.server.assembly.Util;
+import org.json.simple.JSONObject;
+
+public class Clock extends CpuHardware {
+
+    public static final char HWID = 0x0008;
+
+    public static final char DEFAULT_ADDRESS = 0x0008;
+
+    @Override
+    public void handleInterrupt(Status status) {
+
+        int time = (int) GameServer.INSTANCE.getGameUniverse().getTime();
+
+        //Will need to be changed to quadword in about 136 years
+        getCpu().getRegisterSet().getRegister("B").setValue(Util.getHigherWord(time));
+        getCpu().getRegisterSet().getRegister("C").setValue(Util.getLowerWord(time));
+
+    }
+
+    @Override
+    public char getId() {
+        return HWID;
+    }
+
+    public static Clock deserialize(JSONObject hwJSON) {
+        return new Clock();
+    }
+
+    @Override
+    public JSONObject serialise() {
+        JSONObject json = new JSONObject();
+        json.put("hwid", (int) HWID);
+
+        return json;
+    }
+}

Plugin Misc HW/src/main/java/net/simon987/mischwplugin/MiscHWPlugin.java

@@ -0,0 +1,34 @@
+package net.simon987.mischwplugin;
+
+import net.simon987.mischwplugin.event.CpuInitialisationListener;
+import net.simon987.server.ServerConfiguration;
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.io.CpuHardwareDeserializer;
+import net.simon987.server.logging.LogManager;
+import net.simon987.server.plugin.ServerPlugin;
+import org.json.simple.JSONObject;
+
+public class MiscHWPlugin extends ServerPlugin implements CpuHardwareDeserializer {
+
+
+    @Override
+    public void init(ServerConfiguration config) {
+        listeners.add(new CpuInitialisationListener());
+
+        LogManager.LOGGER.info("Initialised Misc Hardware Plugin");
+    }
+
+    @Override
+    public CpuHardware deserializeHardware(JSONObject hwJson) {
+        int hwid = (int) (long) hwJson.get("hwid");
+
+        switch (hwid) {
+            case RandomNumberGenerator.HWID:
+                return RandomNumberGenerator.deserialize(hwJson);
+            case Clock.HWID:
+                return Clock.deserialize(hwJson);
+        }
+
+        return null;
+    }
+}

Plugin Misc HW/src/main/java/net/simon987/mischwplugin/RandomNumberGenerator.java

@@ -0,0 +1,44 @@
+package net.simon987.mischwplugin;
+
+import net.simon987.server.assembly.CpuHardware;
+import net.simon987.server.assembly.Status;
+import org.json.simple.JSONObject;
+
+import java.util.Random;
+
+public class RandomNumberGenerator extends CpuHardware {
+
+    public static final char HWID = 0x0007;
+
+    public static final char DEFAULT_ADDRESS = 0x0007;
+
+    private Random random;
+
+    public RandomNumberGenerator() {
+        random = new Random();
+    }
+
+    @Override
+    public void handleInterrupt(Status status) {
+
+        getCpu().getRegisterSet().getRegister("B").setValue(random.nextInt(0xFFFF));
+
+    }
+
+    @Override
+    public char getId() {
+        return HWID;
+    }
+
+    @Override
+    public JSONObject serialise() {
+        JSONObject json = new JSONObject();
+        json.put("hwid", (int) HWID);
+
+        return json;
+    }
+
+    public static RandomNumberGenerator deserialize(JSONObject hwJSON) {
+        return new RandomNumberGenerator();
+    }
+}

Plugin Misc HW/src/main/java/net/simon987/mischwplugin/event/CpuInitialisationListener.java

@@ -0,0 +1,30 @@
+package net.simon987.mischwplugin.event;
+
+import net.simon987.mischwplugin.Clock;
+import net.simon987.mischwplugin.RandomNumberGenerator;
+import net.simon987.server.assembly.CPU;
+import net.simon987.server.event.CpuInitialisationEvent;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventListener;
+
+public class CpuInitialisationListener implements GameEventListener {
+
+    @Override
+    public Class getListenedEventType() {
+        return CpuInitialisationEvent.class;
+    }
+
+    @Override
+    public void handle(GameEvent event) {
+
+        CPU cpu = (CPU) event.getSource();
+
+        RandomNumberGenerator rngHW = new RandomNumberGenerator();
+        rngHW.setCpu(cpu);
+        Clock clock = new Clock();
+        clock.setCpu(cpu);
+
+        cpu.attachHardware(rngHW, RandomNumberGenerator.DEFAULT_ADDRESS);
+        cpu.attachHardware(clock, Clock.DEFAULT_ADDRESS);
+    }
+}

Plugin Misc HW/src/main/resources/plugin.properties

@@ -0,0 +1,3 @@
+classpath=net.simon987.mischwplugin.MiscHWPlugin
+name=Misc HW Plugin
+version=1.0

Plugin NPC/Plugin NPC.iml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: com.googlecode.json-simple:json-simple:1.1.1" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.10" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
+    <orderEntry type="module" module-name="Server" />
+    <orderEntry type="library" name="Maven: org.java-websocket:Java-WebSocket:1.3.6" level="project" />
+    <orderEntry type="library" name="Maven: mysql:mysql-connector-java:5.1.42" level="project" />
+  </component>
+</module>

Plugin NPC/plugin.properties

@@ -0,0 +1,3 @@
+classpath=net.simon987.npcplugin.NpcPlugin
+name=NPC Plugin
+version=1.0

Plugin NPC/pom.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>net.simon987.pluginnpc</groupId>
+    <artifactId>plugin-npc</artifactId>
+    <version>1.2a</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>net.simon987.server</groupId>
+            <artifactId>server</artifactId>
+            <version>1.2a</version>
+        </dependency>
+    </dependencies>
+</project>

Plugin NPC/src/main/java/net/simon987/npcplugin/Factory.java

@@ -0,0 +1,184 @@
+package net.simon987.npcplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.Updatable;
+import org.json.simple.JSONArray;
+import org.json.simple.JSONObject;
+
+import java.awt.*;
+import java.util.ArrayList;
+
+public class Factory extends GameObject implements Updatable {
+
+    private static final int MAP_INFO = 0x0200;
+    static final int ID = 3;
+
+    private static final int MAX_NPC_COUNT = GameServer.INSTANCE.getConfig().getInt("factory_max_npc_count");
+
+    private static final int NPC_CREATION_COOLDOWN = NonPlayerCharacter.LIFETIME / MAX_NPC_COUNT;
+
+    private ArrayList<NonPlayerCharacter> npcs = new ArrayList<>();
+
+    /**
+     * Number of ticks to wait until the Factory can spawn a new NPC
+     */
+    private int cooldown = 0;
+
+    /**
+     * Temporary NPC objectId array. The Factory links the NPCs to itself when initialised,
+     * at the first call of update().
+     */
+    private Object[] tmpNpcArray = new Object[0];
+
+    /**
+     * Factory are uninitialised until the first update() call
+     */
+    private boolean initialised = false;
+
+    @Override
+    public char getMapInfo() {
+        return MAP_INFO;
+    }
+
+    @Override
+    public void update() {
+
+        if (!initialised) {
+
+            initialised = true;
+
+            for (Object id : tmpNpcArray) {
+
+                NonPlayerCharacter npc = (NonPlayerCharacter) GameServer.INSTANCE.getGameUniverse().getObject((int) (long) id);
+                npc.setFactory(this);
+
+                npcs.add(npc);
+            }
+
+        } else {
+
+            if (cooldown == 0) {
+                if (npcs.size() < MAX_NPC_COUNT) {
+                    Point p = getAdjacentTile();
+
+                    if (p != null) {
+                        NonPlayerCharacter npc = new HarvesterNPC();
+                        npc.setWorld(getWorld());
+                        npc.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
+                        npc.setX(p.x);
+                        npc.setY(p.y);
+                        getWorld().getGameObjects().add(npc);
+                        getWorld().incUpdatable();
+                        npc.setFactory(this);
+
+                        npcs.add(npc);
+                    }
+                }
+
+                cooldown += NPC_CREATION_COOLDOWN;
+
+            } else {
+                cooldown--;
+            }
+        }
+    }
+
+    @Override
+    public boolean isAt(int x, int y) {
+
+        /*
+         * Object is 2x2 tiles, the (x,y) coordinates of the object being
+         * at top-left.
+         * # .
+         * . .
+         */
+        return (x == getX() + 1 || x == getX()) && (y == getY() + 1 || y == getY());
+    }
+
+    @Override
+    public JSONObject serialise() {
+
+        JSONObject json = new JSONObject();
+
+        json.put("i", getObjectId());
+        json.put("x", getX());
+        json.put("y", getY());
+        json.put("t", ID);
+
+        JSONArray tmpNpcArray = new JSONArray();
+
+        for (NonPlayerCharacter npc : npcs) {
+            tmpNpcArray.add(npc.getObjectId());
+        }
+
+        json.put("n", tmpNpcArray);
+
+        return json;
+    }
+
+    public static Factory deserialise(JSONObject json) {
+
+        Factory factory = new Factory();
+        factory.setObjectId((long) json.get("i"));
+        factory.setX((int) (long) json.get("x"));
+        factory.setY((int) (long) json.get("y"));
+
+        factory.tmpNpcArray = (Object[]) ((JSONArray) json.get("n")).toArray();
+
+        return factory;
+    }
+
+    /**
+     * Get the first non-blocked tile that is directly adjacent to the factory, starting from the north-east corner
+     * going clockwise.
+     *
+     * @return The coordinates of the first non-blocked tile, null otherwise.
+     */
+    public Point getAdjacentTile() {
+
+        /*
+         * (2,0)
+         * (2,1)
+         * (1,2)
+         * (0,2)
+         * (-1,1)
+         * (-1,0)
+         * (0,-1)
+         * (1,-1)
+         */
+
+        if (!getWorld().isTileBlocked(getX() + 2, getY())) {
+            return new Point(getX() + 2, getY());
+
+        } else if (!getWorld().isTileBlocked(getX() + 2, getY() + 1)) {
+            return new Point(getX() + 2, getY() + 1);
+
+        } else if (!getWorld().isTileBlocked(getX() + 1, getY() + 2)) {
+            return new Point(getX() + 1, getY() + 2);
+
+        } else if (!getWorld().isTileBlocked(getX(), getY() + 2)) {
+            return new Point(getX(), getY() + 2);
+
+        } else if (!getWorld().isTileBlocked(getX() + -1, getY() + 1)) {
+            return new Point(getX() + -1, getY() + 1);
+
+        } else if (!getWorld().isTileBlocked(getX() + -1, getY())) {
+            return new Point(getX() + -1, getY());
+
+        } else if (!getWorld().isTileBlocked(getX(), getY() + -1)) {
+            return new Point(getX(), getY() + -1);
+
+        } else if (!getWorld().isTileBlocked(getX() + 1, getY() + -1)) {
+            return new Point(getX() + 1, getY() + -1);
+
+        } else {
+            return null;
+        }
+
+    }
+
+    ArrayList<NonPlayerCharacter> getNpcs() {
+        return npcs;
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/HarvestTask.java

@@ -0,0 +1,105 @@
+package net.simon987.npcplugin;
+
+
+import net.simon987.server.assembly.Util;
+import net.simon987.server.game.Direction;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.InventoryHolder;
+import net.simon987.server.logging.LogManager;
+
+import java.util.ArrayList;
+import java.util.Random;
+
+public class HarvestTask extends NPCTask {
+
+    private Random random;
+
+    private int pause;
+
+    public HarvestTask() {
+        random = new Random();
+        pause = 0;
+    }
+
+    private Direction nextWorldDirection = null;
+
+    @Override
+    public boolean checkCompleted() {
+        return false;
+    }
+
+    @Override
+    public void tick(NonPlayerCharacter npc) {
+
+        if (pause == 0) {
+            //Get biomass
+            ArrayList<GameObject> biomass = new ArrayList<>(10);
+
+            for (GameObject object : npc.getWorld().getGameObjects()) {
+                //Plant MAP_INFO
+                if ((object.getMapInfo() & 0x4000) == 0x4000) {
+                    biomass.add(object);
+                }
+            }
+
+            //Get closest one
+            int minDist = Integer.MAX_VALUE;
+            GameObject minBiomass = null;
+
+            for (GameObject plant : biomass) {
+
+                int dist = Util.manhattanDist(npc.getX(), npc.getY(), plant.getX(), plant.getY());
+
+                if (dist < minDist) {
+                    minDist = dist;
+                    minBiomass = plant;
+                }
+            }
+
+            //Move towards it
+            if (minBiomass != null && minDist == 1) {
+                //Reached biomass, change direction to face it
+                Direction newDirection = Direction.getFacing(npc.getX(), npc.getY(),
+                        minBiomass.getX(), minBiomass.getY());
+
+                if (newDirection != null) {
+                    npc.setDirection(newDirection);
+
+                    //Reached biomass, harvest it
+                    if (minBiomass instanceof InventoryHolder) {
+                        ((InventoryHolder) minBiomass).takeItem(1);
+                        pause += 6;
+                    }
+
+
+                } else {
+                    LogManager.LOGGER.severe("FIXME: tick:HarvestTask, Direction is null");
+                }
+
+                nextWorldDirection = null;
+            } else if (minBiomass != null && npc.moveTo(minBiomass.getX(), minBiomass.getY(), 1)) {
+                //Moving towards biomass...
+                nextWorldDirection = null;
+            } else {
+
+                if (nextWorldDirection == null) {
+
+                    while (!npc.gotoWorld(nextWorldDirection)) {
+                        nextWorldDirection = Direction.getDirection(random.nextInt(4));
+                    }
+
+                    pause += 6;
+                } else {
+                    npc.gotoWorld(nextWorldDirection);
+                }
+            }
+
+
+        } else {
+            pause--;
+        }
+
+    }
+
+
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/HarvesterNPC.java

@@ -0,0 +1,69 @@
+package net.simon987.npcplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.game.Direction;
+import org.json.simple.JSONObject;
+
+public class HarvesterNPC extends NonPlayerCharacter {
+
+    public static final int ID = 10;
+
+
+    public HarvesterNPC() {
+        setTask(new HarvestTask());
+        hp = 10;
+    }
+
+    @Override
+    public void update() {
+
+        super.update();
+
+        if (getFactory() != null) {
+            if (getTask().checkCompleted()) {
+
+                setTask(new HarvestTask());
+
+            } else {
+                getTask().tick(this);
+            }
+
+            //Self-destroy when age limit is reached
+            if (getAge() >= NonPlayerCharacter.LIFETIME) {
+                setDead(true);
+                getFactory().getNpcs().remove(this);
+            }
+        }
+    }
+
+    @Override
+    public JSONObject serialise() {
+        JSONObject json = super.serialise();
+
+        json.put("i", getObjectId());
+        json.put("x", getX());
+        json.put("y", getY());
+        json.put("direction", getDirection().ordinal());
+        json.put("hp", hp);
+        json.put("energy", energy);
+        json.put("action", getAction().ordinal());
+        json.put("t", ID);
+
+        return json;
+    }
+
+    public static HarvesterNPC deserialize(JSONObject json) {
+
+        HarvesterNPC npc = new HarvesterNPC();
+        npc.setObjectId((long) json.get("i"));
+        npc.setX((int) (long) json.get("x"));
+        npc.setY((int) (long) json.get("y"));
+        npc.hp = (int) (long) json.get("hp");
+        npc.setDirection(Direction.getDirection((int) (long) json.get("direction")));
+        npc.energy = (int) (long) json.get("energy");
+        npc.maxEnergy = GameServer.INSTANCE.getConfig().getInt("battery_max_energy");
+
+        return npc;
+
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/NPCTask.java

@@ -0,0 +1,10 @@
+package net.simon987.npcplugin;
+
+
+public abstract class NPCTask {
+
+    public abstract boolean checkCompleted();
+
+    public abstract void tick(NonPlayerCharacter npc);
+
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/NonPlayerCharacter.java

@@ -0,0 +1,184 @@
+package net.simon987.npcplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.assembly.Util;
+import net.simon987.server.game.Action;
+import net.simon987.server.game.Direction;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.Updatable;
+import net.simon987.server.game.pathfinding.Node;
+import net.simon987.server.game.pathfinding.Pathfinder;
+import net.simon987.server.logging.LogManager;
+
+import java.util.ArrayList;
+
+public abstract class NonPlayerCharacter extends GameObject implements Updatable {
+
+    private static final int MAP_INFO = 0x0040;
+
+    private static final int MAX_FACTORY_DISTANCE = GameServer.INSTANCE.getConfig().getInt("npc_max_factory_distance");
+
+    public static final int LIFETIME = GameServer.INSTANCE.getConfig().getInt("npc_lifetime");
+
+    //Unused
+    int hp;
+    int energy;
+    int maxEnergy;
+
+    /**
+     * Current task
+     */
+    private NPCTask task;
+
+    private Action lastAction = Action.IDLE;
+
+    /**
+     * Factory that created this NPC
+     */
+    private Factory factory;
+
+    /**
+     * If set to true, the NPC will be destroyed next tick if it is
+     * not linked to a Factory
+     */
+    private boolean selfDestroyNextTick = false;
+
+    /**
+     * Age of the npc, in ticks
+     */
+    private int age = 0;
+
+    @Override
+    public char getMapInfo() {
+        return MAP_INFO;
+    }
+
+    @Override
+    public void update() {
+
+        age++;
+
+        //Destroy NPCs that are not linked with a Factory
+        if (factory == null) {
+            if (selfDestroyNextTick) {
+                setDead(true);
+            }
+
+            selfDestroyNextTick = true;
+        }
+    }
+
+    /**
+     * Attempt to move the NPC to the specified coordinates
+     *
+     * @param range distance to the desired coordinates, in tiles
+     * @return true if the path is passable
+     */
+    boolean moveTo(int x, int y, int range) {
+
+        ArrayList<Node> path = Pathfinder.findPath(getWorld(), getX(), getY(), x, y, range);
+
+        if (path != null && path.size() > 0) {
+
+            Node nextTile = path.get(1);
+
+            Direction newDirection = Direction.getFacing(getX(), getY(), nextTile.x, nextTile.y);
+
+            if (newDirection != null) {
+                setDirection(newDirection);
+            } else {
+                LogManager.LOGGER.severe("FIXME: moveTo:NonPlayerCharacter, Direction is null");
+            }
+
+            if (incrementLocation()) {
+                lastAction = Action.WALKING;
+                return true;
+            }
+        }
+
+        lastAction = Action.IDLE;
+        return false;
+    }
+
+    /**
+     * Go to the next World in the specified Direction.
+     *
+     * @return true if the World in the specified Direction is within the max. distance from the Factory
+     */
+    boolean gotoWorld(Direction direction) {
+
+        if (direction == Direction.NORTH) {
+
+            if (Util.manhattanDist(factory.getWorld().getX(), factory.getWorld().getY(),
+                    getWorld().getX(), getWorld().getY() - 1) <= MAX_FACTORY_DISTANCE) {
+                if (!moveTo(8, 0, 0)) {
+                    setDirection(Direction.NORTH);
+                    incrementLocation();
+                }
+                return true;
+            } else {
+                return false;
+            }
+
+        } else if (direction == Direction.EAST) {
+            if (Util.manhattanDist(factory.getWorld().getX(), factory.getWorld().getY(),
+                    getWorld().getX() + 1, getWorld().getY()) <= MAX_FACTORY_DISTANCE) {
+                if (!moveTo(15, 7, 0)) {
+                    setDirection(Direction.EAST);
+                    incrementLocation();
+                }
+                return true;
+            } else {
+                return false;
+            }
+        } else if (direction == Direction.SOUTH) {
+            if (Util.manhattanDist(factory.getWorld().getX(), factory.getWorld().getY(),
+                    getWorld().getX(), getWorld().getY() + 1) <= MAX_FACTORY_DISTANCE) {
+                if (!moveTo(8, 15, 0)) {
+                    setDirection(Direction.SOUTH);
+                    incrementLocation();
+                }
+                return true;
+            } else {
+                return false;
+            }
+        } else if (direction == Direction.WEST) {
+            if (Util.manhattanDist(factory.getWorld().getX(), factory.getWorld().getY(),
+                    getWorld().getX() - 1, getWorld().getY()) <= MAX_FACTORY_DISTANCE) {
+                if (!moveTo(0, 7, 0)) {
+                    setDirection(Direction.WEST);
+                    incrementLocation();
+                }
+                return true;
+            } else {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    public NPCTask getTask() {
+        return task;
+    }
+
+    public void setTask(NPCTask task) {
+        this.task = task;
+    }
+
+    public Action getAction() {
+        return lastAction;
+    }
+
+    public Factory getFactory() {
+        return factory;
+    }
+
+    public void setFactory(Factory factory) {
+        this.factory = factory;
+    }
+
+    public int getAge() {
+        return age;
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/NpcPlugin.java

@@ -0,0 +1,35 @@
+package net.simon987.npcplugin;
+
+import net.simon987.npcplugin.event.WorldCreationListener;
+import net.simon987.server.ServerConfiguration;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.io.GameObjectDeserializer;
+import net.simon987.server.logging.LogManager;
+import net.simon987.server.plugin.ServerPlugin;
+import org.json.simple.JSONObject;
+
+public class NpcPlugin extends ServerPlugin implements GameObjectDeserializer {
+
+
+    @Override
+    public void init(ServerConfiguration configuration) {
+
+        listeners.add(new WorldCreationListener());
+
+        LogManager.LOGGER.info("Initialised NPC plugin");
+    }
+
+    @Override
+    public GameObject deserializeObject(JSONObject object) {
+
+        int objType = (int) (long) object.get("t");
+
+        if (objType == HarvesterNPC.ID) {
+            return HarvesterNPC.deserialize(object);
+        } else if (objType == Factory.ID) {
+            return Factory.deserialise(object);
+        }
+
+        return null;
+    }
+}

Plugin NPC/src/main/java/net/simon987/npcplugin/event/WorldCreationListener.java

@@ -0,0 +1,64 @@
+package net.simon987.npcplugin.event;
+
+import net.simon987.npcplugin.Factory;
+import net.simon987.server.GameServer;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventListener;
+import net.simon987.server.event.WorldGenerationEvent;
+import net.simon987.server.game.World;
+import net.simon987.server.logging.LogManager;
+
+import java.util.Random;
+
+public class WorldCreationListener implements GameEventListener {
+
+    /**
+     * Spawn rate. Higher = rarer: A factory will be spawn about every FACTORY_SPAWN_RATE generated Worlds
+     */
+    private static final int FACTORY_SPAWN_RATE = 35;
+
+    private Random random = new Random();
+
+    @Override
+    public Class getListenedEventType() {
+        return WorldGenerationEvent.class;
+    }
+
+    @Override
+    public void handle(GameEvent event) {
+
+        if (random.nextInt(FACTORY_SPAWN_RATE) == 0) {
+
+            World world = ((WorldGenerationEvent) event).getWorld();
+
+            for (int x = 2; x < 12; x++) {
+                for (int y = 2; y < 12; y++) {
+
+                    if ((!world.isTileBlocked(x, y) && !world.isTileBlocked(x + 1, y) &&
+                            !world.isTileBlocked(x, y + 1) && !world.isTileBlocked(x + 1, y + 1))) {
+
+                        Factory factory = new Factory();
+
+                        factory.setWorld(world);
+                        factory.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
+                        factory.setX(x);
+                        factory.setY(y);
+
+                        if (factory.getAdjacentTile() == null) {
+                            //Factory has no non-blocked adjacent tiles
+                            continue;
+                        }
+
+                        world.getGameObjects().add(factory);
+                        world.incUpdatable();
+
+                        LogManager.LOGGER.info("Spawned Factory at (" + world.getX() + ", " + world.getY() +
+                                ") (" + x + ", " + y + ")");
+
+                        return;
+                    }
+                }
+            }
+        }
+    }
+}

Plugin Plant/Plugin Plant.iml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: com.googlecode.json-simple:json-simple:1.1.1" level="project" />
+    <orderEntry type="library" name="Maven: junit:junit:4.10" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.1" level="project" />
+    <orderEntry type="module" module-name="Server" />
+    <orderEntry type="library" name="Maven: org.java-websocket:Java-WebSocket:1.3.6" level="project" />
+    <orderEntry type="library" name="Maven: mysql:mysql-connector-java:5.1.42" level="project" />
+  </component>
+</module>

Plugin Plant/plugin.properties

@@ -1,3 +0,0 @@
-classpath=net.simon987.plantplugin.PlantPlugin
-name=Plant Plugin
-version=1.0

Plugin Plant/pom.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>net.simon987.pluginplant</groupId>
+    <artifactId>plugin-biomassBlob</artifactId>
+    <version>1.2a</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>net.simon987.server</groupId>
+            <artifactId>server</artifactId>
+            <version>1.2a</version>
+        </dependency>
+    </dependencies>
+</project>

Plugin Plant/src/main/java/net/simon987/biomassplugin/BiomassBlob.java

@@ -0,0 +1,110 @@
+package net.simon987.biomassplugin;
+
+import net.simon987.server.game.GameObject;
+import net.simon987.server.game.InventoryHolder;
+import org.json.simple.JSONObject;
+
+public class BiomassBlob extends GameObject implements InventoryHolder {
+
+    private static final char MAP_INFO = 0x4000;
+    public static final int ID = 2;
+
+    /**
+     * Yield of the blob, in biomass units
+     */
+    private int biomassCount;
+    /**
+     * Style of the blob (Only visual)
+     */
+    //  private int style;
+
+    private static final int ITM_BIOMASS = 1;
+
+    @Override
+    public char getMapInfo() {
+        return MAP_INFO;
+    }
+
+    @Override
+    public JSONObject serialise() {
+
+        JSONObject json = new JSONObject();
+
+        json.put("t", ID);
+        json.put("i", getObjectId());
+        json.put("x", getX());
+        json.put("y", getY());
+        json.put("b", biomassCount);
+        //  json.put("style", style);
+
+        return json;
+    }
+
+
+    public int getBiomassCount() {
+        return biomassCount;
+    }
+
+    public void setBiomassCount(int biomassCount) {
+        this.biomassCount = biomassCount;
+    }
+
+//    public int getStyle() {
+//        return style;
+//    }
+//
+//    public void setStyle(int style) {
+//        this.style = style;
+//    }
+
+    public static BiomassBlob deserialize(JSONObject json) {
+
+        BiomassBlob biomassBlob = new BiomassBlob();
+
+        biomassBlob.setObjectId((long) json.get("i"));
+        biomassBlob.setX((int) (long) json.get("x"));
+        biomassBlob.setY((int) (long) json.get("y"));
+        //   biomassBlob.style = (int) (long) json.get("style");
+        biomassBlob.biomassCount = (int) (long) json.get("b");
+
+        return biomassBlob;
+    }
+
+    /**
+     * Called when an object attempts to place an item in this BiomassBlob
+     *
+     * @param item item id (see MarConstants.ITEM_*)
+     * @return Always returns false
+     */
+    @Override
+    public boolean placeItem(int item) {
+        //Why would you want to place an item in a blob?
+        return false;
+    }
+
+    @Override
+    public boolean canTakeItem(int item) {
+        return item == ITM_BIOMASS && biomassCount >= 1;
+    }
+
+    /**
+     * Called when an object attempts to take an item from this BiomassBlob.
+     * If the object requests biomass, it will be subtracted from biomassCount, and
+     * if it reaches 0, the plant is deleted
+     *
+     * @param item item id (see MarConstants.ITEM_*)
+     */
+    @Override
+    public void takeItem(int item) {
+
+        if (item == ITM_BIOMASS) {
+            if (biomassCount > 1) {
+                biomassCount--;
+            } else {
+                //Delete plant
+                setDead(true);
+            }
+        }
+
+    }
+}

Plugin Plant/src/main/java/net/simon987/biomassplugin/BiomassPlugin.java

@@ -0,0 +1,35 @@
+package net.simon987.biomassplugin;
+
+import net.simon987.biomassplugin.event.WorldCreationListener;
+import net.simon987.biomassplugin.event.WorldUpdateListener;
+import net.simon987.server.ServerConfiguration;
+import net.simon987.server.game.GameObject;
+import net.simon987.server.io.GameObjectDeserializer;
+import net.simon987.server.logging.LogManager;
+import net.simon987.server.plugin.ServerPlugin;
+import org.json.simple.JSONObject;
+
+public class BiomassPlugin extends ServerPlugin implements GameObjectDeserializer {
+
+
+    @Override
+    public void init(ServerConfiguration config) {
+        listeners.add(new WorldCreationListener());
+        listeners.add(new WorldUpdateListener(config));
+
+        LogManager.LOGGER.info("Initialised Biomass plugin");
+    }
+
+    @Override
+    public GameObject deserializeObject(JSONObject object) {
+
+        int objType = (int) (long) object.get("t");
+
+        if (objType == BiomassBlob.ID) {
+
+            return BiomassBlob.deserialize(object);
+        }
+
+        return null;
+    }
+}

Plugin Plant/src/main/java/net/simon987/biomassplugin/WorldUtils.java

@@ -0,0 +1,81 @@
+package net.simon987.biomassplugin;
+
+import net.simon987.server.GameServer;
+import net.simon987.server.game.World;
+import net.simon987.server.logging.LogManager;
+
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.Random;
+
+public class WorldUtils {
+
+    /**
+     * Generate a list of biomass blobs for a world
+     */
+    public static ArrayList<BiomassBlob> generateBlobs(World world, int minCount, int maxCount, int yield) {
+
+        Random random = new Random();
+        int blobCount = random.nextInt(maxCount - minCount) + minCount;
+        ArrayList<BiomassBlob> biomassBlobs = new ArrayList<>(maxCount);
+
+        //Count number of plain tiles. If there is less plain tiles than desired amount of blobs,
+        //set the desired amount of blobs to the plain tile count
+        int[][] tiles = world.getTileMap().getTiles();
+        int plainCount = 0;
+        for (int y = 0; y < World.WORLD_SIZE; y++) {
+            for (int x = 0; x < World.WORLD_SIZE; x++) {
+
+                if (tiles[x][y] == 0) {
+                    plainCount++;
+                }
+            }
+        }
+
+        if (blobCount > plainCount) {
+            blobCount = plainCount;
+        }
+
+        outerLoop:
+        for (int i = 0; i < blobCount; i++) {
+
+            Point p = world.getTileMap().getRandomPlainTile();
+            if (p != null) {
+
+                //Don't block worlds
+                int counter = 0;
+                while (p.x == 0 || p.y == 0 || p.x == World.WORLD_SIZE - 1 || p.y == World.WORLD_SIZE - 1 ||
+                        world.isTileBlocked(p.x, p.y)) {
+                    p = world.getTileMap().getRandomPlainTile();
+                    counter++;
+
+                    if (counter > 25) {
+                        continue outerLoop;
+                    }
+                }
+
+                for (BiomassBlob biomassBlob : biomassBlobs) {
+                    if (biomassBlob.getX() == p.x && biomassBlob.getY() == p.y) {
+                        //There is already a blob here
+                        continue outerLoop;
+                    }
+                }
+
+                BiomassBlob biomassBlob = new BiomassBlob();
+                biomassBlob.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
+                // biomassBlob.setStyle(0); //TODO: set style depending on difficulty level? or random? from config?
+                biomassBlob.setBiomassCount(yield);
+                biomassBlob.setX(p.x);
+                biomassBlob.setY(p.y);
+                biomassBlob.setWorld(world);
+
+                biomassBlobs.add(biomassBlob);
+            }
+        }
+
+        LogManager.LOGGER.info("Generated " + biomassBlobs.size() + " biomassBlobs for World (" + world.getX() + ',' +
+                world.getY() + ')');
+
+        return biomassBlobs;
+    }
+}

Plugin Plant/src/main/java/net/simon987/biomassplugin/event/WorldCreationListener.java

@@ -0,0 +1,31 @@
+package net.simon987.biomassplugin.event;
+
+import net.simon987.biomassplugin.BiomassBlob;
+import net.simon987.biomassplugin.WorldUtils;
+import net.simon987.server.GameServer;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventListener;
+import net.simon987.server.event.WorldGenerationEvent;
+
+import java.util.ArrayList;
+
+public class WorldCreationListener implements GameEventListener {
+    @Override
+    public Class getListenedEventType() {
+        return WorldGenerationEvent.class;
+    }
+
+    @Override
+    public void handle(GameEvent event) {
+
+        int minCount = GameServer.INSTANCE.getConfig().getInt("minBiomassCount");
+        int maxCount = GameServer.INSTANCE.getConfig().getInt("maxBiomassCount");
+        int yield = GameServer.INSTANCE.getConfig().getInt("biomass_yield");
+
+        ArrayList<BiomassBlob> biomassBlobs = WorldUtils.generateBlobs(((WorldGenerationEvent) event).getWorld(),
+                minCount, maxCount, yield);
+
+        ((WorldGenerationEvent) event).getWorld().getGameObjects().addAll(biomassBlobs);
+
+    }
+}

Plugin Plant/src/main/java/net/simon987/biomassplugin/event/WorldUpdateListener.java

@@ -0,0 +1,72 @@
+package net.simon987.biomassplugin.event;
+
+import net.simon987.biomassplugin.BiomassBlob;
+import net.simon987.biomassplugin.WorldUtils;
+import net.simon987.server.GameServer;
+import net.simon987.server.ServerConfiguration;
+import net.simon987.server.event.GameEvent;
+import net.simon987.server.event.GameEventListener;
+import net.simon987.server.event.WorldUpdateEvent;
+import net.simon987.server.game.World;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+
+
+public class WorldUpdateListener implements GameEventListener {
+
+    private HashMap<World, Long> worldWaitMap = new HashMap<>(200);
+
+    private int minBlobCount;
+    private int maxBlobCount;
+    private int blobYield;
+    private int waitTime;
+    private int blobThreshold;
+
+    public WorldUpdateListener(ServerConfiguration config) {
+
+        minBlobCount = config.getInt("minBiomassRespawnCount");
+        maxBlobCount = config.getInt("maxBiomassRespawnCount");
+        waitTime = config.getInt("biomassRespawnTime");
+        blobThreshold = config.getInt("biomassRespawnThreshold");
+        blobYield = config.getInt("biomass_yield");
+
+    }
+
+    @Override
+    public Class getListenedEventType() {
+        return WorldUpdateEvent.class;
+    }
+
+
+    @Override
+    public void handle(GameEvent event) {
+
+        World world = ((WorldUpdateEvent) event).getWorld();
+
+        //If there is less than the respawn threshold,
+        if (world.getGameObjects(BiomassBlob.class).size() < blobThreshold) {
+
+            //Set a timer for respawn_time ticks
+            if (!worldWaitMap.containsKey(world) || worldWaitMap.get(world) == 0L) {
+                worldWaitMap.put(world, GameServer.INSTANCE.getGameUniverse().getTime() + waitTime);
+            } else {
+
+                long waitUntil = worldWaitMap.get(world);
+
+                if (GameServer.INSTANCE.getGameUniverse().getTime() >= waitUntil) {
+
+                    //If the timer was set less than respawn_time ticks ago, respawn the blobs
+                    ArrayList<BiomassBlob> newBlobs = WorldUtils.generateBlobs(world, minBlobCount,
+                            maxBlobCount, blobYield);
+                    world.getGameObjects().addAll(newBlobs);
+
+                    //Set the 'waitUntil' time to 0 to indicate that we are not waiting
+                    worldWaitMap.replace(world, 0L);
+                }
+            }
+
+        }
+
+    }
+}

Plugin Plant/src/main/resources/plugin.properties

@@ -0,0 +1,3 @@
+classpath=net.simon987.biomassplugin.BiomassPlugin
+name=Biomass Plugin
+version=1.0

Plugin Plant/src/net/simon987/plantplugin/Plant.java

@@ -1,162 +0,0 @@
-package net.simon987.plantplugin;
-
-import net.simon987.server.GameServer;
-import net.simon987.server.game.GameObject;
-import net.simon987.server.game.InventoryHolder;
-import net.simon987.server.game.Updatable;
-import org.json.simple.JSONObject;
-
-public class Plant extends GameObject implements Updatable, InventoryHolder{
-
-    private static final char MAP_INFO = 0x4000;
-    public static final int ID = 2;
-
-    /**
-     * Grow time (see config.properties)
-     */
-    private static final int GROW_TIME = GameServer.INSTANCE.getConfig().getInt("plant_grow_time");
-
-    /**
-     * Game time of the creation of this Plant
-     */
-    private long creationTime;
-
-    /**
-     * Whether the plant is grown or not
-     */
-    private boolean grown;
-
-    /**
-     * Yield of the plant, in biomass units
-     */
-    private int biomassCount;
-    /**
-     * Style of the plant (Only visual)
-     */
-    private int style;
-
-    private static final int ITM_BIOMASS = 1;
-
-    @Override
-    public char getMapInfo() {
-        return MAP_INFO;
-    }
-
-    @Override
-    public JSONObject serialise() {
-
-        JSONObject json = new JSONObject();
-
-        json.put("type", ID);
-        json.put("id", getObjectId());
-        json.put("x", getX());
-        json.put("y", getY());
-        json.put("creationTime", creationTime);
-        json.put("grown", grown);
-        json.put("biomassCount", biomassCount);
-        json.put("style", style);
-
-        return json;
-    }
-
-    /**
-     * Called every tick
-     */
-    @Override
-    public void update() {
-        if (!grown) {
-            //Check grow
-            if (creationTime + GROW_TIME <= GameServer.INSTANCE.getGameUniverse().getTime()) {
-                grown = true;
-                biomassCount = GameServer.INSTANCE.getConfig().getInt("plant_yield");
-            }
-        }
-    }
-
-    public long getCreationTime() {
-        return creationTime;
-    }
-
-    public void setCreationTime(long creationTime) {
-        this.creationTime = creationTime;
-    }
-
-    public boolean isGrown() {
-        return grown;
-    }
-
-    public void setGrown(boolean grown) {
-        this.grown = grown;
-    }
-
-    public int getBiomassCount() {
-        return biomassCount;
-    }
-
-    public void setBiomassCount(int biomassCount) {
-        this.biomassCount = biomassCount;
-    }
-
-    public int getStyle() {
-        return style;
-    }
-
-    public void setStyle(int style) {
-        this.style = style;
-    }
-
-    public static Plant deserialize(JSONObject json){
-
-        Plant plant = new Plant();
-
-        plant.setObjectId((int)(long)json.get("id"));
-        plant.setX((int)(long)json.get("x"));
-        plant.setY((int)(long)json.get("y"));
-        plant.grown = (boolean)json.get("grown");
-        plant.creationTime = (long)json.get("creationTime");
-        plant.style = (int)(long)json.get("style");
-        plant.biomassCount = (int)(long)json.get("biomassCount");
-
-        return plant;
-    }
-
-    /**
-     * Called when an object attempts to place an item in this Plant
-     *
-     * @param item item id (see MarConstants.ITEM_*)
-     * @return Always returns false
-     */
-    @Override
-    public boolean placeItem(int item) {
-        //Why would you want to place an item in a plant?
-        return false;
-    }
-
-    /**
-     * Called when an object attempts to take an item from this Plant.
-     * If the object requests biomass, it will be subtracted from biomassCount, and
-     * if it reaches 0, the plant is deleted
-     *
-     * @param item item id (see MarConstants.ITEM_*)
-     * @return true if the requested item is ITEM_BIOMASS and if the plant is grown
-     */
-    @Override
-    public boolean takeItem(int item) {
-
-        if (item == ITM_BIOMASS) {
-            if (grown && biomassCount > 1) {
-                biomassCount--;
-                return true;
-            } else if (grown) {
-                //Delete plant
-                setDead(true);
-                return true;
-            } else {
-                return false;
-            }
-        } else {
-            return false;
-        }
-
-    }
-}

Plugin Plant/src/net/simon987/plantplugin/PlantPlugin.java

@@ -1,32 +0,0 @@
-package net.simon987.plantplugin;
-
-import net.simon987.plantplugin.event.WorldCreationListener;
-import net.simon987.server.game.GameObject;
-import net.simon987.server.io.GameObjectDeserializer;
-import net.simon987.server.logging.LogManager;
-import net.simon987.server.plugin.ServerPlugin;
-import org.json.simple.JSONObject;
-
-public class PlantPlugin extends ServerPlugin implements GameObjectDeserializer {
-
-
-
-    @Override
-    public void init() {
-        listeners.add(new WorldCreationListener());
-        LogManager.LOGGER.info("Initialised Plant plugin");
-    }
-
-    @Override
-    public GameObject deserializeObject(JSONObject object) {
-
-        int objType = (int)(long)object.get("type");
-
-        if(objType == Plant.ID) {
-
-            return Plant.deserialize(object);
-        }
-
-        return null;
-    }
-}

Plugin Plant/src/net/simon987/plantplugin/event/WorldCreationListener.java

@@ -1,96 +0,0 @@
-package net.simon987.plantplugin.event;
-
-import net.simon987.plantplugin.Plant;
-import net.simon987.server.GameServer;
-import net.simon987.server.event.GameEvent;
-import net.simon987.server.event.GameEventListener;
-import net.simon987.server.event.WorldGenerationEvent;
-import net.simon987.server.game.World;
-import net.simon987.server.logging.LogManager;
-
-import java.awt.*;
-import java.util.ArrayList;
-import java.util.Random;
-
-public class WorldCreationListener implements GameEventListener {
-    @Override
-    public Class getListenedEventType() {
-        return WorldGenerationEvent.class;
-    }
-
-    @Override
-    public void handle(GameEvent event) {
-
-        ArrayList<Plant> plants = generatePlants(((WorldGenerationEvent)event).getWorld());
-
-        ((WorldGenerationEvent)event).getWorld().getGameObjects().addAll(plants);
-
-    }
-
-    /**
-     * Generate a list of plants for a world
-     */
-    public ArrayList<Plant> generatePlants(World world) {
-
-        int minTreeCount = GameServer.INSTANCE.getConfig().getInt("minTreeCount");
-        int maxTreeCount = GameServer.INSTANCE.getConfig().getInt("maxTreeCount");
-        int plant_yield = GameServer.INSTANCE.getConfig().getInt("plant_yield");
-
-        Random random = new Random();
-        int treeCount = random.nextInt(maxTreeCount - minTreeCount) + minTreeCount;
-        ArrayList<Plant> plants = new ArrayList<>(maxTreeCount);
-
-        //Count number of plain tiles. If there is less plain tiles than desired amount of trees,
-        //set the desired amount of trees to the plain tile count
-        int[][] tiles = world.getTileMap().getTiles();
-        int plainCount = 0;
-        for (int y = 0; y < World.WORLD_SIZE; y++) {
-            for (int x = 0; x < World.WORLD_SIZE; x++) {
-
-                if (tiles[x][y] == 0) {
-                    plainCount++;
-                }
-            }
-        }
-
-        if (treeCount > plainCount) {
-            treeCount = plainCount;
-        }
-
-        outerLoop:
-        for (int i = 0; i < treeCount; i++) {
-
-            Point p = world.getTileMap().getRandomPlainTile();
-            if (p != null) {
-
-                //Don't block worlds
-                while (p.x == 0 || p.y == 0 || p.x == World.WORLD_SIZE - 1 || p.y == World.WORLD_SIZE - 1) {
-                    p = world.getTileMap().getRandomPlainTile();
-                }
-
-                for (Plant plant : plants) {
-                    if (plant.getX() == p.x && plant.getY() == p.y) {
-                        //There is already a plant here
-                        continue outerLoop;
-                    }
-                }
-
-                Plant plant = new Plant();
-                plant.setObjectId(GameServer.INSTANCE.getGameUniverse().getNextObjectId());
-                plant.setStyle(0); //TODO: set style depending on difficulty level? or random? from config?
-                plant.setBiomassCount(plant_yield);
-                plant.setCreationTime(0); // Plants generated by the world generator always have creationTime of 0
-                plant.setX(p.x);
-                plant.setY(p.y);
-                plant.setWorld(world);
-
-                plants.add(plant);
-            }
-        }
-
-        LogManager.LOGGER.info("Generated " + plants.size() + " plants for World (" + world.getX() + ',' +
-                world.getY() + ')');
-
-        return plants;
-    }
-}

README.md

@@ -1,3 +1,11 @@
-# Much-Assembly-Required
+# [Live demo](https://muchassemblyrequired.com)
+Program the 8086-like microprocessor of a robot in a grid-based multiplayer world. The game is web based so no installation is required.
+In its current state, players can walk around the game universe and collect Biomass blobs & Iron/copper ore using the online code editor.
 
-https://muchassemblyrequired.com
+![screenshot from 2017-11-12 13-01-43](https://user-images.githubusercontent.com/7120851/32701793-e5d07e98-c7a9-11e7-9931-f8db7b287994.png)
+
+Wiki: [GitHub](https://github.com/simon987/Much-Assembly-Required/wiki)    
+Chat: [Slack](https://join.slack.com/t/muchassemblyrequired/shared_invite/enQtMjY3Mjc1OTUwNjEwLTkyOTIwOTA5OGY4MDVlMGI4NzM5YzlhMWJiMGY1OWE2NjUxODQ1NWQ1YTcxMTA1NGZkYzNjYzMyM2E1ODdmNzg)
+
+
+_Building instructions coming soon_

Server/Server.iml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="jdk" jdkName="1.8" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: org.java-websocket:Java-WebSocket:1.3.6" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+    <orderEntry type="library" name="Maven: mysql:mysql-connector-java:5.1.42" level="project" />
+    <orderEntry type="library" name="Maven: com.googlecode.json-simple:json-simple:1.1.1" level="project" />
+  </component>
+</module>

Server/pom.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>net.simon987.server</groupId>
+    <artifactId>server</artifactId>
+    <version>1.2a</version>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.java-websocket</groupId>
+            <artifactId>Java-WebSocket</artifactId>
+            <version>1.3.6</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>5.1.42</version>
+        </dependency>
+        <dependency>
+            <groupId>com.googlecode.json-simple</groupId>
+            <artifactId>json-simple</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+
+    </dependencies>
+
+</project>

Server/src/main/java/net/simon987/server/GameServer.java

@@ -1,9 +1,13 @@
 package net.simon987.server;
 
 
+import net.simon987.server.event.GameEvent;
 import net.simon987.server.event.GameEventDispatcher;
+import net.simon987.server.event.TickEvent;
+import net.simon987.server.game.DayNightCycle;
 import net.simon987.server.game.GameUniverse;
 import net.simon987.server.game.World;
+import net.simon987.server.io.FileUtils;
 import net.simon987.server.logging.LogManager;
 import net.simon987.server.plugin.PluginManager;
 import net.simon987.server.plugin.ServerPlugin;
@@ -15,12 +19,14 @@ import org.json.simple.JSONObject;
 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.util.ArrayList;
 
 public class GameServer implements Runnable {
 
     public final static GameServer INSTANCE = new GameServer();
-
-    private GameUniverse gameUniverse;
+	private final static String SAVE_JSON = "save.json";
+    
+	private GameUniverse gameUniverse;
     private GameEventDispatcher eventDispatcher;
     private PluginManager pluginManager;
 
@@ -28,6 +34,10 @@ public class GameServer implements Runnable {
 
     private SocketServer socketServer;
 
+    private int maxExecutionTime;
+
+    private DayNightCycle dayNightCycle;
+
     public GameServer() {
 
         this.config = new ServerConfiguration(new File("config.properties"));
@@ -35,25 +45,31 @@ public class GameServer implements Runnable {
         gameUniverse = new GameUniverse(config);
         pluginManager = new PluginManager();
 
+        maxExecutionTime = config.getInt("user_timeout");
+
+
+        dayNightCycle = new DayNightCycle();
+
         //Load all plugins in plugins folder, if it doesn't exist, create it
         File pluginDir = new File("plugins/");
         File[] pluginDirListing = pluginDir.listFiles();
 
-        if(pluginDirListing != null) {
-            for(File pluginFile : pluginDirListing) {
+        if (pluginDirListing != null) {
+            for (File pluginFile : pluginDirListing) {
 
-                if(pluginFile.getName().endsWith(".jar")){
-                    pluginManager.load(pluginFile);
+                if (pluginFile.getName().endsWith(".jar")) {
+                    pluginManager.load(pluginFile, config);
                 }
 
             }
         } else {
-            if(!pluginDir.mkdir()) {
+            if (!pluginDir.mkdir()) {
                 LogManager.LOGGER.severe("Couldn't create plugin directory");
             }
         }
 
         eventDispatcher = new GameEventDispatcher(pluginManager);
+        eventDispatcher.getListeners().add(dayNightCycle);
 
     }
 
@@ -102,35 +118,78 @@ public class GameServer implements Runnable {
     private void tick() {
         gameUniverse.incrementTime();
 
-        //Process user code
-        for(User user : gameUniverse.getUsers()){
+        //Dispatch tick event
+        GameEvent event = new TickEvent(gameUniverse.getTime());
+        eventDispatcher.dispatch(event); //Ignore cancellation
+
+
+        //Process user code
+        ArrayList<User> users_ = gameUniverse.getUsers();
+        for (User user : users_) {
+
+            if (user.getCpu() != null) {
+                try {
+
+                    int timeout = Math.min(user.getControlledUnit().getEnergy(), maxExecutionTime);
+
+                    user.getCpu().reset();
+                    int cost = user.getCpu().execute(timeout);
+                    user.getControlledUnit().spendEnergy(cost);
+
+                } catch (Exception e) {
+                    LogManager.LOGGER.severe("Error executing " + user.getUsername() + "'s code");
+                    e.printStackTrace();
+                }
 
-            if(user.getCpu() != null){
-                user.getCpu().reset();
-                user.getCpu().execute();
             }
         }
 
         //Process each worlds
-        for (World world : gameUniverse.getWorlds()) {
-           world.update();
+        //Avoid concurrent modification
+        ArrayList<World> worlds = new ArrayList<>(gameUniverse.getWorlds());
+        int updatedWorlds = 0;
+        for (World world : worlds) {
+            if (world.shouldUpdate()) {
+                world.update();
+                updatedWorlds++;
+            }
         }
 
         //Save
         if (gameUniverse.getTime() % config.getInt("save_interval") == 0) {
             save(new File("save.json"));
         }
+        
+		// Clean up history files
+		if(gameUniverse.getTime() % config.getInt("clean_interval") == 0) {
+			FileUtils.cleanHistory(config.getInt("history_size"));
+		}
 
         socketServer.tick();
 
-        LogManager.LOGGER.info("Processed " + gameUniverse.getWorlds().size() + " worlds");
+        LogManager.LOGGER.info("Processed " + gameUniverse.getWorlds().size() + " worlds (" + updatedWorlds +
+                ") updated");
     }
+
     /**
      * Save game universe to file in JSON format
+     *
      * @param file JSON file to save
      */
-    public void save(File file){
+    public void save(File file) {
 
+		boolean dirExists = FileUtils.prepDirectory(FileUtils.DIR_PATH);
+		
+		if (new File(new File(SAVE_JSON).getAbsolutePath()).exists() && dirExists) {
+			byte[] data = FileUtils.bytifyFile(new File(SAVE_JSON).toPath());
+			try {
+				FileUtils.writeSaveToZip(SAVE_JSON, data);
+			} catch (IOException e) {
+				System.out.println("Failed to write " + SAVE_JSON + " to zip file");
+				e.printStackTrace();
+			}
+		}
+		
         try {
             FileWriter fileWriter = new FileWriter(file);
 
@@ -138,7 +197,7 @@ public class GameServer implements Runnable {
 
             JSONArray plugins = new JSONArray();
 
-            for(ServerPlugin plugin : pluginManager.getPlugins()){
+            for (ServerPlugin plugin : pluginManager.getPlugins()) {
                 plugins.add(plugin.serialise());
             }
 
@@ -166,4 +225,8 @@ public class GameServer implements Runnable {
     public void setSocketServer(SocketServer socketServer) {
         this.socketServer = socketServer;
     }
+
+    public DayNightCycle getDayNightCycle() {
+        return dayNightCycle;
+    }
 }

Server/src/main/java/net/simon987/server/Main.java

@@ -0,0 +1,30 @@
+package net.simon987.server;
+
+import net.simon987.server.logging.LogManager;
+import net.simon987.server.webserver.SocketServer;
+
+import java.io.File;
+import java.net.InetSocketAddress;
+
+
+public class Main {
+    public static void main(String[] args) {
+
+
+        LogManager.initialize();
+        ServerConfiguration config = new ServerConfiguration(new File("config.properties"));
+
+        //Load
+        GameServer.INSTANCE.getGameUniverse().load(new File("save.json"));
+
+
+        SocketServer socketServer = new SocketServer(new InetSocketAddress(config.getString("webSocket_host"),
+                config.getInt("webSocket_port")), config);
+
+        GameServer.INSTANCE.setSocketServer(socketServer);
+
+
+        (new Thread(socketServer)).start();
+        (new Thread(GameServer.INSTANCE)).start();
+    }
+}

Server/src/main/java/net/simon987/server/assembly/Assembler.java

@@ -208,7 +208,7 @@ public class Assembler {
 
             } else {
                 //Handle integer value
-                char s = (char)(int)Integer.decode(value);
+                char s = (char) (int) Integer.decode(value);
 
                 for (int i = 0; i < factor; i++) {
                     out.write(Util.getHigherByte(s));
@@ -253,6 +253,8 @@ public class Assembler {
 
         } else if (tokens[0].toUpperCase().equals(".DATA")) {
 
+            LogManager.LOGGER.fine("DEBUG: .data @" + currentLine);
+
             result.defineSegment(Segment.DATA, currentLine, currentOffset);
             throw new PseudoInstructionException(currentLine);
         }
@@ -271,7 +273,7 @@ public class Assembler {
          *  usage: constant_name EQU <immediate_value>
          *  A constant treated the same way as a label.
         */
-
+        line = line.trim();
         String[] tokens = line.split("\\s+");
 
 
@@ -279,7 +281,7 @@ public class Assembler {
             if (tokens[1].toUpperCase().equals("EQU") && tokens.length == 3) {
                 try {
                     //Save value as a label
-                    labels.put(tokens[0], (char)(int)Integer.decode(tokens[2]));
+                    labels.put(tokens[0], (char) (int) Integer.decode(tokens[2]));
                 } catch (NumberFormatException e) {
                     throw new InvalidOperandException("Usage: constant_name EQU immediate_value", currentLine);
                 }

Server/src/main/java/net/simon987/server/assembly/AssemblyResult.java

@@ -3,7 +3,10 @@ package net.simon987.server.assembly;
 import net.simon987.server.ServerConfiguration;
 import net.simon987.server.assembly.exception.AssemblyException;
 import net.simon987.server.assembly.exception.DuplicateSegmentException;
+import net.simon987.server.logging.LogManager;
 
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
 import java.util.ArrayList;
 import java.util.HashMap;
 
@@ -77,6 +80,10 @@ public class AssemblyResult {
             if (!codeSegmentSet) {
                 codeSegmentOffset = origin + currentOffset;
                 codeSegmentLine = currentLine;
+
+                LogManager.LOGGER.fine("DEBUG: .text offset @" + codeSegmentOffset);
+
+
                 codeSegmentSet = true;
             } else {
                 throw new DuplicateSegmentException(currentLine);
@@ -87,6 +94,9 @@ public class AssemblyResult {
             if (!dataSegmentSet) {
                 dataSegmentOffset = origin + currentOffset;
                 dataSegmentLine = currentLine;
+
+                LogManager.LOGGER.fine("DEBUG: .data offset @" + dataSegmentOffset);
+
                 dataSegmentSet = true;
             } else {
                 throw new DuplicateSegmentException(currentLine);
@@ -96,4 +106,20 @@ public class AssemblyResult {
 
     }
 
+    public char[] getWords() {
+
+        char[] assembledCode = new char[bytes.length / 2];
+        ByteBuffer.wrap(bytes).order(ByteOrder.BIG_ENDIAN).asCharBuffer().get(assembledCode);
+
+        return assembledCode;
+    }
+
+    public int getCodeSegmentOffset() {
+        if (codeSegmentSet) {
+            return codeSegmentOffset;
+        } else {
+            return origin;
+        }
+    }
+
 }

Server/src/main/java/net/simon987/server/assembly/CPU.java

@@ -20,7 +20,7 @@ import java.util.HashMap;
  * a Memory object and execute them. A CPU object holds registers objects &
  * a Memory object.
  */
-public class CPU implements JSONSerialisable{
+public class CPU implements JSONSerialisable {
 
     /**
      *
@@ -60,22 +60,21 @@ public class CPU implements JSONSerialisable{
 
     private ServerConfiguration config;
 
-    private long timeout;
-
     private int registerSetSize;
 
+    private static final char EXECUTION_COST_ADDR = 0x0050;
+    private static final char EXECUTED_INS_ADDR = 0x0051;
+
     /**
      * Creates a new CPU
      */
-    public CPU(ServerConfiguration config, User user) throws CancelledException{
+    public CPU(ServerConfiguration config, User user) throws CancelledException {
         this.config = config;
         instructionSet = new DefaultInstructionSet();
         registerSet = new DefaultRegisterSet();
         attachedHardware = new HashMap<>();
         codeSegmentOffset = config.getInt("org_offset");
 
-        timeout = config.getInt("user_timeout");
-
         instructionSet.add(new JmpInstruction(this));
         instructionSet.add(new JnzInstruction(this));
         instructionSet.add(new JzInstruction(this));
@@ -93,13 +92,18 @@ public class CPU implements JSONSerialisable{
         instructionSet.add(new JsInstruction(this));
         instructionSet.add(new HwiInstruction(this));
         instructionSet.add(new HwqInstruction(this));
+        instructionSet.add(new XchgInstruction(this));
+        instructionSet.add(new JcInstruction(this));
+        instructionSet.add(new JncInstruction(this));
+        instructionSet.add(new JnoInstruction(this));
+        instructionSet.add(new JoInstruction(this));
 
         status = new Status();
         memory = new Memory(config.getInt("memory_size"));
 
         GameEvent event = new CpuInitialisationEvent(this, user);
         GameServer.INSTANCE.getEventDispatcher().dispatch(event);
-        if(event.isCancelled()){
+        if (event.isCancelled()) {
             throw new CancelledException();
         }
     }
@@ -111,7 +115,7 @@ public class CPU implements JSONSerialisable{
         ip = codeSegmentOffset;
     }
 
-    public void execute() {
+    public int execute(int timeout) {
 
         long startTime = System.currentTimeMillis();
         int counter = 0;
@@ -123,10 +127,16 @@ public class CPU implements JSONSerialisable{
         while (!status.isBreakFlag()) {
             counter++;
 
-            if(counter % 1000 == 0){
-                if (System.currentTimeMillis() >= (startTime + timeout)) {
+            if (counter % 10000 == 0) {
+                if (System.currentTimeMillis() > (startTime + timeout)) {
                     LogManager.LOGGER.fine("CPU Timeout " + this + " after " + counter + "instructions (" + timeout + "ms): " + (double) counter / ((double) timeout / 1000) / 1000000 + "MHz");
-                    return;
+
+                    //Write execution cost and instruction count to memory
+                    memory.set(EXECUTION_COST_ADDR, timeout);
+                    memory.set(EXECUTED_INS_ADDR, Util.getHigherWord(counter));
+                    memory.set(EXECUTED_INS_ADDR + 1, Util.getLowerWord(counter));
+
+                    return timeout;
                 }
             }
 
@@ -146,8 +156,17 @@ public class CPU implements JSONSerialisable{
             executeInstruction(instruction, source, destination);
 //            LogManager.LOGGER.info(instruction.getMnemonic());
         }
-        double elapsed = (System.currentTimeMillis() - startTime);
-        LogManager.LOGGER.fine("----------\n" + counter + " instruction in " + elapsed + "ms : " + (double) counter / (elapsed / 1000) / 1000000 + "MHz");
+        int elapsed = (int) (System.currentTimeMillis() - startTime);
+
+        LogManager.LOGGER.fine(counter + " instruction in " + elapsed + "ms : " + (double) counter / (elapsed / 1000) / 1000000 + "MHz");
+
+
+        //Write execution cost and instruction count to memory
+        memory.set(EXECUTION_COST_ADDR, elapsed);
+        memory.set(EXECUTED_INS_ADDR, Util.getHigherWord(counter));
+        memory.set(EXECUTED_INS_ADDR + 1, Util.getLowerWord(counter));
+
+        return elapsed;
     }
 
     public void executeInstruction(Instruction instruction, int source, int destination) {
@@ -263,7 +282,7 @@ public class CPU implements JSONSerialisable{
             if (destination == 0) {
                 //Single operand
                 ip++;
-                instruction.execute(memory, registerSet.get(source), status);
+                instruction.execute(memory, registerSet.get(source - registerSetSize), status);
             } else if (destination == Operand.IMMEDIATE_VALUE) {
                 //Destination is an immediate value
                 //this shouldn't happen
@@ -276,11 +295,11 @@ public class CPU implements JSONSerialisable{
             } else if (destination <= registerSetSize) {
                 //Destination is a register
                 ip++;
-                instruction.execute(registerSet, destination, memory, registerSet.get(source), status);
+                instruction.execute(registerSet, destination, memory, registerSet.get(source - registerSetSize), status);
             } else if (destination <= registerSetSize * 2) {
                 //Destination is [reg]
                 ip++;
-                instruction.execute(memory, registerSet.get(destination - registerSetSize), memory, registerSet.get(source), status);
+                instruction.execute(memory, registerSet.get(destination - registerSetSize), memory, registerSet.get(source - registerSetSize), status);
             } else {
                 //Assuming that destination is [reg + x]
                 ip += 2;
@@ -308,7 +327,7 @@ public class CPU implements JSONSerialisable{
                 ip += 2;
                 instruction.execute(memory, memory.get(ip - 1), memory,
                         registerSet.get(source - registerSetSize - registerSetSize) + sourceDisp, status);
-            } else if (destination < registerSetSize) {
+            } else if (destination <= registerSetSize) {
                 //Destination is a register
                 ip++;
                 instruction.execute(registerSet, destination, memory,
@@ -339,7 +358,7 @@ public class CPU implements JSONSerialisable{
 
         JSONArray hardwareList = new JSONArray();
 
-        for(Integer address : attachedHardware.keySet()){
+        for (Integer address : attachedHardware.keySet()) {
 
             CpuHardware hardware = attachedHardware.get(address);
 
@@ -357,17 +376,17 @@ public class CPU implements JSONSerialisable{
 
         CPU cpu = new CPU(GameServer.INSTANCE.getConfig(), user);
 
-        cpu.codeSegmentOffset = (int)(long)json.get("codeSegmentOffset");
+        cpu.codeSegmentOffset = (int) (long) json.get("codeSegmentOffset");
 
-        JSONArray hardwareList = (JSONArray)json.get("hardware");
+        JSONArray hardwareList = (JSONArray) json.get("hardware");
 
-        for(JSONObject serialisedHw : (ArrayList<JSONObject>)hardwareList){
+        for (JSONObject serialisedHw : (ArrayList<JSONObject>) hardwareList) {
             CpuHardware hw = CpuHardware.deserialize(serialisedHw);
             hw.setCpu(cpu);
-            cpu.attachHardware(hw, (int)(long)serialisedHw.get("address"));
+            cpu.attachHardware(hw, (int) (long) serialisedHw.get("address"));
         }
 
-        cpu.memory = Memory.deserialize((JSONObject)json.get("memory"));
+        cpu.memory = Memory.deserialize((JSONObject) json.get("memory"));
         cpu.registerSet = RegisterSet.deserialize((JSONObject) json.get("registerSet"));
 
         return cpu;
@@ -402,18 +421,18 @@ public class CPU implements JSONSerialisable{
         this.codeSegmentOffset = codeSegmentOffset;
     }
 
-    public void attachHardware(CpuHardware hardware, int address){
+    public void attachHardware(CpuHardware hardware, int address) {
         attachedHardware.put(address, hardware);
     }
 
-    public void detachHardware(int address){
+    public void detachHardware(int address) {
         attachedHardware.remove(address);
     }
 
-    public boolean hardwareInterrupt(int address){
+    public boolean hardwareInterrupt(int address) {
         CpuHardware hardware = attachedHardware.get(address);
 
-        if(hardware != null){
+        if (hardware != null) {
             hardware.handleInterrupt(status);
             return true;
         } else {
@@ -443,5 +462,11 @@ public class CPU implements JSONSerialisable{
         return str;
     }
 
+    public CpuHardware getHardware(int address) {
+
+        return attachedHardware.get(address);
+
+    }
+
 
 }

Server/src/main/java/net/simon987/server/assembly/CpuHardware.java

@@ -26,14 +26,14 @@ public abstract class CpuHardware implements JSONSerialisable {
 
     public abstract char getId();
 
-    public static CpuHardware deserialize(JSONObject hwJson){
+    public static CpuHardware deserialize(JSONObject hwJson) {
 
-        for(ServerPlugin plugin : GameServer.INSTANCE.getPluginManager().getPlugins()){
+        for (ServerPlugin plugin : GameServer.INSTANCE.getPluginManager().getPlugins()) {
 
-            if(plugin instanceof CpuHardwareDeserializer){
+            if (plugin instanceof CpuHardwareDeserializer) {
                 CpuHardware hw = ((CpuHardwareDeserializer) plugin).deserializeHardware(hwJson);
 
-                if(hw != null){
+                if (hw != null) {
                     return hw;
                 }
             }

Server/src/main/java/net/simon987/server/assembly/DefaultInstructionSet.java

@@ -1,6 +1,7 @@
 package net.simon987.server.assembly;
 
 import net.simon987.server.assembly.instruction.*;
+import net.simon987.server.logging.LogManager;
 
 import java.util.HashMap;
 
@@ -31,11 +32,18 @@ public class DefaultInstructionSet implements InstructionSet {
         add(new AndInstruction());
         add(new OrInstruction());
         add(new ShlInstruction());
+        add(new SalInstruction()); //Alias is added
         add(new ShrInstruction());
         add(new XorInstruction());
         add(new TestInstruction());
         add(new CmpInstruction());
         add(new NegInstruction());
+        add(new NotInstruction());
+        add(new RorInstruction());
+        add(new RolInstruction());
+        add(new RclInstruction());
+        add(new RcrInstruction());
+        add(new SarInstruction());
     }
 
     /**
@@ -48,10 +56,10 @@ public class DefaultInstructionSet implements InstructionSet {
     public Instruction get(int opcode) {
 
         Instruction instruction = instructionMap.get(opcode);
-        if(instruction != null){
+        if (instruction != null) {
             return instruction;
         } else {
-           // System.out.println("Invalid instruction " + opcode);
+            // System.out.println("Invalid instruction " + opcode);
             //Todo: Notify user?  Set error flag?
             return defaultInstruction;
         }
@@ -82,6 +90,12 @@ public class DefaultInstructionSet implements InstructionSet {
 
     @Override
     public void add(Instruction instruction) {
-        instructionMap.put(instruction.getOpCode(), instruction);
+        if (instructionMap.containsKey(instruction.getOpCode())) {
+            LogManager.LOGGER.fine(instruction.getMnemonic() + " instruction is an alias for " +
+                    instructionMap.get(instruction.getOpCode()).getMnemonic());
+        } else {
+            instructionMap.put(instruction.getOpCode(), instruction);
+
+        }
     }
 }

Server/src/main/java/net/simon987/server/assembly/Memory.java

@@ -1,12 +1,15 @@
 package net.simon987.server.assembly;
 
 
+import net.simon987.server.GameServer;
 import net.simon987.server.io.JSONSerialisable;
 import net.simon987.server.logging.LogManager;
 import org.json.simple.JSONObject;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
 import java.util.Arrays;
 import java.util.Base64;
 import java.util.zip.Deflater;
@@ -23,7 +26,7 @@ public class Memory implements Target, JSONSerialisable {
     /**
      * Contents of the memory
      */
-    private byte[] bytes;
+    private char[] words;
 
     /**
      * Create an empty Memory object
@@ -31,7 +34,7 @@ public class Memory implements Target, JSONSerialisable {
      * @param size Size of the memory, in words
      */
     public Memory(int size) {
-        bytes = new byte[size];
+        words = new char[size];
     }
 
     /**
@@ -42,29 +45,26 @@ public class Memory implements Target, JSONSerialisable {
      */
     @Override
     public int get(int address) {
-        address = (char)address * 2; //Because our Memory is only divisible by 16bits
+        address = (char) address;
 
-        if (address < 0 || address + 2 > bytes.length) {
+        if (address >= words.length) {
             LogManager.LOGGER.info("DEBUG: Trying to get memory out of bounds " + address);
             return 0;
         }
 
-        return (((bytes[address] & 0xFF) << 8) | (bytes[address + 1] & 0xFF));
+        return words[address];
     }
 
     /**
      * Write x words from an array at an offset
      */
-    public boolean write(int offset, byte[] bytes, int count) {
+    public boolean write(int offset, char[] src, int srcOffset, int count) {
 
-        offset = (char)offset * 2;
-
-
-        if (offset + count > this.bytes.length || count < 0 || offset < 0) {
+        if (offset + count > this.words.length || srcOffset >= src.length || count < 0 || offset < 0) {
             return false;
         }
 
-        System.arraycopy(bytes, 0, this.bytes, offset, count);
+        System.arraycopy(src, srcOffset, this.words, offset, count);
         return true;
     }
 
@@ -76,30 +76,31 @@ public class Memory implements Target, JSONSerialisable {
      */
     @Override
     public void set(int address, int value) {
+        address = (char) address;
 
-        address = (char)address * 2;
-
-
-        if (address < 0 || address + 2 > bytes.length) {
+        if (address >= words.length) {
             LogManager.LOGGER.info("DEBUG: Trying to set memory out of bounds: " + address);
             return;
         }
 
-        bytes[address] = (byte) ((value >> 8) & 0xFF);
-        bytes[address + 1] = (byte) (value & 0xFF);
+        words[address] = (char) value;
     }
 
     /**
      * Fill the memory with 0s
      */
     public void clear() {
-        Arrays.fill(bytes, (byte) 0);
+        Arrays.fill(words, (char) 0);
     }
 
     /**
      * Get byte array of the Memory object
      */
     public byte[] getBytes() {
+
+        byte[] bytes = new byte[words.length * 2];
+        ByteBuffer.wrap(bytes).order(ByteOrder.BIG_ENDIAN).asCharBuffer().put(words);
+
         return bytes;
     }
 
@@ -112,7 +113,7 @@ public class Memory implements Target, JSONSerialisable {
             ByteArrayOutputStream stream = new ByteArrayOutputStream();
             Deflater compressor = new Deflater(Deflater.BEST_COMPRESSION, true);
             DeflaterOutputStream deflaterOutputStream = new DeflaterOutputStream(stream, compressor);
-            deflaterOutputStream.write(bytes);
+            deflaterOutputStream.write(getBytes());
             deflaterOutputStream.close();
             byte[] compressedBytes = stream.toByteArray();
 
@@ -122,39 +123,45 @@ public class Memory implements Target, JSONSerialisable {
             e.printStackTrace();
         }
 
-        //To deflate
-
-        /*
-        ByteArrayOutputStream stream2 = new ByteArrayOutputStream();
-        Inflater decompresser = new Inflater(true);
-        InflaterOutputStream inflaterOutputStream = new InflaterOutputStream(stream2, decompresser);
-        inflaterOutputStream.write(output);
-        inflaterOutputStream.close();
-        byte[] output2 = stream2.toByteArray();
-         */
-
-
         return json;
     }
 
-    public static Memory deserialize(JSONObject json){
+    public static Memory deserialize(JSONObject json) {
 
         Memory memory = new Memory(0);
-        byte[] compressedBytes = Base64.getDecoder().decode((String)json.get("zipBytes"));
 
-        try {
-            ByteArrayOutputStream baos = new ByteArrayOutputStream();
-            Inflater decompressor = new Inflater(true);
-            InflaterOutputStream inflaterOutputStream = new InflaterOutputStream(baos, decompressor);
-            inflaterOutputStream.write(compressedBytes);
-            inflaterOutputStream.close();
+        String zipBytesStr = (String) json.get("zipBytes");
 
-            memory.bytes = baos.toByteArray();
+        if (zipBytesStr != null) {
+            byte[] compressedBytes = Base64.getDecoder().decode((String) json.get("zipBytes"));
 
-        } catch (IOException e) {
-            e.printStackTrace();
+            try {
+                ByteArrayOutputStream baos = new ByteArrayOutputStream();
+                Inflater decompressor = new Inflater(true);
+                InflaterOutputStream inflaterOutputStream = new InflaterOutputStream(baos, decompressor);
+                inflaterOutputStream.write(compressedBytes);
+                inflaterOutputStream.close();
+
+                memory.setBytes(baos.toByteArray());
+
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        } else {
+            LogManager.LOGGER.severe("Memory was manually deleted");
+            memory = new Memory(GameServer.INSTANCE.getConfig().getInt("memory_size"));
         }
 
+
         return memory;
     }
+
+    public void setBytes(byte[] bytes) {
+        this.words = new char[bytes.length / 2];
+        ByteBuffer.wrap(bytes).order(ByteOrder.BIG_ENDIAN).asCharBuffer().get(this.words);
+    }
+
+    public char[] getWords() {
+        return words;
+    }
 }

Server/src/main/java/net/simon987/server/assembly/RegisterSet.java

@@ -87,7 +87,7 @@ public class RegisterSet implements Target, JSONSerialisable {
 
         Register register = registers.get(address);
 
-        if(register != null){
+        if (register != null) {
             return register.getValue();
         } else {
             return 0;
@@ -106,7 +106,7 @@ public class RegisterSet implements Target, JSONSerialisable {
 
         Register register = registers.get(address);
 
-        if(register != null){
+        if (register != null) {
             register.setValue(value);
         } else {
             LogManager.LOGGER.info("DEBUG: trying to set unknown reg index : " + address);
@@ -144,7 +144,7 @@ public class RegisterSet implements Target, JSONSerialisable {
     @Override
     public JSONObject serialise() {
         JSONArray registers = new JSONArray();
-        for(Integer index : this.registers.keySet()){
+        for (Integer index : this.registers.keySet()) {
             JSONObject register = new JSONObject();
 
             register.put("index", index);
@@ -164,14 +164,14 @@ public class RegisterSet implements Target, JSONSerialisable {
 
         RegisterSet registerSet = new RegisterSet();
 
-        JSONArray registers = (JSONArray)json.get("registers");
+        JSONArray registers = (JSONArray) json.get("registers");
 
-        for(JSONObject jsonRegister : (ArrayList<JSONObject>)registers){
+        for (JSONObject jsonRegister : (ArrayList<JSONObject>) registers) {
 
-            Register register = new Register((String)jsonRegister.get("name"));
-            register.setValue((int)(long)jsonRegister.get("value"));
+            Register register = new Register((String) jsonRegister.get("name"));
+            register.setValue((int) (long) jsonRegister.get("value"));
 
-            registerSet.registers.put((int)(long)jsonRegister.get("index"), register);
+            registerSet.registers.put((int) (long) jsonRegister.get("index"), register);
 
         }
 
@@ -182,7 +182,7 @@ public class RegisterSet implements Target, JSONSerialisable {
     public String toString() {
         String str = "";
 
-        for(Integer index: registers.keySet()){
+        for (Integer index : registers.keySet()) {
             str += index + " " + registers.get(index).getName() + "=" + Util.toHex(registers.get(index).getValue()) + "\n";
         }
 

Server/src/main/java/net/simon987/server/assembly/Util.java

@@ -41,7 +41,7 @@ public class Util {
         return s & 0x0000FFFF;
     }
 
-    public static String toHex(int a){
+    public static String toHex(int a) {
         return String.format("%04X ", uShort(a));
     }
 

Server/src/main/java/net/simon987/server/assembly/instruction/AddInstruction.java

@@ -8,8 +8,8 @@ import net.simon987.server.assembly.Util;
 /**
  * Add two numbers together, the result is stored in the destination operand
  * <p>
- *     ADD A, B
- *     A = A + B
+ * ADD A, B
+ * A = A + B
  * </p>
  */
 public class AddInstruction extends Instruction {
@@ -39,8 +39,8 @@ public class AddInstruction extends Instruction {
     @Override
     public Status execute(Target dst, int dstIndex, Target src, int srcIndex, Status status) {
 
-        int a = (char)dst.get(dstIndex);
-        int b = (char)src.get(srcIndex);
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src.get(srcIndex);
 
         return add(a, b, status, dst, dstIndex);
     }
@@ -48,8 +48,8 @@ public class AddInstruction extends Instruction {
     @Override
     public Status execute(Target dst, int dstIndex, int src, Status status) {
 
-        int a = (char)dst.get(dstIndex);
-        int b = (char)src;
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src;
 
         return add(a, b, status, dst, dstIndex);
     }

Server/src/main/java/net/simon987/server/assembly/instruction/AndInstruction.java

@@ -8,8 +8,8 @@ import net.simon987.server.assembly.Util;
 /**
  * AND two numbers together, the result is stored in the destination operand
  * <p>
- *     AND A, B
- *     A = A & B
+ * AND A, B
+ * A = A & B
  * </p>
  * FLAGS: OF=0 S=* Z=* X=0
  */
@@ -27,8 +27,8 @@ public class AndInstruction extends Instruction {
     @Override
     public Status execute(Target dst, int dstIndex, Target src, int srcIndex, Status status) {
 
-        int a =(char)dst.get(dstIndex);
-        int b = (char)src.get(srcIndex);
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src.get(srcIndex);
 
 
         int result = (a & b);
@@ -45,8 +45,8 @@ public class AndInstruction extends Instruction {
 
     @Override
     public Status execute(Target dst, int dstIndex, int src, Status status) {
-        int a = (char)dst.get(dstIndex);
-        int b = (char)src;
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src;
 
 
         int result = (a & b);

Server/src/main/java/net/simon987/server/assembly/instruction/CmpInstruction.java

@@ -23,8 +23,8 @@ public class CmpInstruction extends Instruction {
     public Status execute(Target dst, int dstIndex, Target src, int srcIndex, Status status) {
 
 
-        int a = (char)dst.get(dstIndex);
-        int b = (char)src.get(srcIndex);
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src.get(srcIndex);
 
 
         int result = a - b;
@@ -40,8 +40,8 @@ public class CmpInstruction extends Instruction {
     @Override
     public Status execute(Target dst, int dstIndex, int src, Status status) {
 
-        int a = (char)dst.get(dstIndex);
-        int b = (char)src;
+        int a = (char) dst.get(dstIndex);
+        int b = (char) src;
 
         int result = a - b;
 

Server/src/main/java/net/simon987/server/assembly/instruction/DivInstruction.java

@@ -28,16 +28,16 @@ public class DivInstruction extends Instruction {
     public Status execute(Target src, int srcIndex, Status status) {
 
         //Source = Y:A
-        int source = ((((char)cpu.getRegisterSet().getRegister("Y").getValue() & 0xFFFF) << 16)) |
-                ((char)cpu.getRegisterSet().getRegister("A").getValue() & 0xFFFF);
+        int source = ((((char) cpu.getRegisterSet().getRegister("Y").getValue() & 0xFFFF) << 16)) |
+                ((char) cpu.getRegisterSet().getRegister("A").getValue() & 0xFFFF);
 
         if (src.get(srcIndex) == 0) {
             //Division by 0
             status.setBreakFlag(true);
             status.setErrorFlag(true);
         } else {
-            cpu.getRegisterSet().getRegister("A").setValue((char)(source / (char)src.get(srcIndex)));
-            cpu.getRegisterSet().getRegister("Y").setValue((char)(source % (char)src.get(srcIndex)));
+            cpu.getRegisterSet().getRegister("A").setValue((char) (source / (char) src.get(srcIndex)));
+            cpu.getRegisterSet().getRegister("Y").setValue((char) (source % (char) src.get(srcIndex)));
         }
 
         return status;
@@ -48,16 +48,16 @@ public class DivInstruction extends Instruction {
 
 
         //Source = Y:A
-        int source = ((((char)cpu.getRegisterSet().getRegister("Y").getValue() & 0xFFFF) << 16)) |
-                ((char)cpu.getRegisterSet().getRegister("A").getValue() & 0xFFFF);
+        int source = ((((char) cpu.getRegisterSet().getRegister("Y").getValue() & 0xFFFF) << 16)) |
+                ((char) cpu.getRegisterSet().getRegister("A").getValue() & 0xFFFF);
 
         if (src == 0) {
             //Division by 0
             status.setBreakFlag(true);
             status.setErrorFlag(true);
         } else {
-            cpu.getRegisterSet().getRegister("A").setValue((char)(source / (char)src));
-            cpu.getRegisterSet().getRegister("Y").setValue((char)(source % (char)src));
+            cpu.getRegisterSet().getRegister("A").setValue((char) (source / (char) src));
+            cpu.getRegisterSet().getRegister("Y").setValue((char) (source % (char) src));
         }
 
 

Server/src/main/java/net/simon987/server/assembly/instruction/JcInstruction.java

@@ -0,0 +1,36 @@
+package net.simon987.server.assembly.instruction;
+
+import net.simon987.server.assembly.CPU;
+import net.simon987.server.assembly.Instruction;
+import net.simon987.server.assembly.Status;
+import net.simon987.server.assembly.Target;
+
+public class JcInstruction extends Instruction {
+
+    private static final int OPCODE = 33;
+
+    private CPU cpu;
+
+    public JcInstruction(CPU cpu) {
+        super("jc", OPCODE);
+        this.cpu = cpu;
+    }
+
+    @Override
+    public Status execute(Target src, int srcIndex, Status status) {
+        if (status.isCarryFlag()) {
+            cpu.setIp((char) src.get(srcIndex));
+        }
+        return status;
+    }
+
+    @Override
+    public Status execute(int src, Status status) {
+        if (status.isCarryFlag()) {
+            cpu.setIp((char) src);
+        }
+        return status;
+    }
+
+
+}

Server/src/main/java/net/simon987/server/assembly/instruction/JncInstruction.java

@@ -0,0 +1,35 @@
+package net.simon987.server.assembly.instruction;
+
+import net.simon987.server.assembly.CPU;
+import net.simon987.server.assembly.Instruction;
+import net.simon987.server.assembly.Status;
+import net.simon987.server.assembly.Target;
+
+public class JncInstruction extends Instruction {
+
+    private static final int OPCODE = 34;
+
+    private CPU cpu;
+
+    public JncInstruction(CPU cpu) {
+        super("jnc", OPCODE);
+        this.cpu = cpu;
+    }
+
+    @Override
+    public Status execute(Target src, int srcIndex, Status status) {
+        if (!status.isCarryFlag()) {
+            cpu.setIp((char) src.get(srcIndex));
+        }
+        return status;
+    }
+
+    @Override
+    public Status execute(int src, Status status) {
+        if (!status.isCarryFlag()) {
+            cpu.setIp((char) src);
+        }
+        return status;
+    }
+
+}

Server/src/main/java/net/simon987/server/assembly/instruction/JnoInstruction.java

@@ -0,0 +1,35 @@
+package net.simon987.server.assembly.instruction;
+
+import net.simon987.server.assembly.CPU;
+import net.simon987.server.assembly.Instruction;
+import net.simon987.server.assembly.Status;
+import net.simon987.server.assembly.Target;
+
+
+public class JnoInstruction extends Instruction {
+
+    private static final int OPCODE = 37;
+
+    private CPU cpu;
+
+    public JnoInstruction(CPU cpu) {
+        super("jno", OPCODE);
+        this.cpu = cpu;
+    }
+
+    @Override
+    public Status execute(Target src, int srcIndex, Status status) {
+        if (!status.isOverflowFlag()) {
+            cpu.setIp((char) src.get(srcIndex));
+        }
+        return status;
+    }
+
+    @Override
+    public Status execute(int src, Status status) {
+        if (!status.isOverflowFlag()) {
+            cpu.setIp((char) src);
+        }
+        return status;
+    }
+}