Lots of whitespace changes after importing the project into Eclipse

.gitignore

@@ -1,3 +1,6 @@
 *~
 *#
 target
+.classpath
+.project
+.settings

src/main/java/com/loomcom/j6502/AddressDecoder.java

@@ -3,7 +3,6 @@ package com.loomcom.j6502;
 import java.util.Map;
 
 public class AddressDecoder {
-
     /**
      * Map of memory ranges to IO devices.
      */
@@ -11,10 +10,11 @@ public class AddressDecoder {
     
     public AddressDecoder() {}
 
-    public void addDevice(Device d) 
-	throws MemoryConflictException {
-	// Make sure there's no memory overlap.
-	// Add the device to the map.
+    public void addDevice(Device d)
+		throws MemoryConflictException {
+    	// Make sure there's no memory overlap.
+    	// Add the device to the map.
+    	m_ioMap.put(d.getMemoryRange(), d);
     }
 
     /**
@@ -23,7 +23,7 @@ public class AddressDecoder {
      * device.
      */
     public boolean isComplete() {
-	return true;
+    	return true;
     }
 
     /** 
@@ -31,9 +31,8 @@ public class AddressDecoder {
      * are gaps between IO devices.
      */
     public boolean isSparse() {
-	return !isComplete();
+    	return !isComplete();
     }
-
 }
 
 class MemoryRange {

src/main/java/com/loomcom/j6502/Cpu.java

@@ -5,35 +5,33 @@ package com.loomcom.j6502;
  */
 public class Cpu {
 
-    /**
-     * The Address Decoder responsible for routing memory
-     * read/write requests to the correct IO devices.  Any
-     * simulated device can be 
-     */
-    AddressDecoder m_adc;
-
     /**
      * The Program Counter.
      */
-    int m_pc;
+    private int m_pc;
 
     /**
      * The system stack pointer.
      */
-    int m_sp;
-
+    private int m_sp;
+    
     /**
-     * The internal 
+     * Reference to the simulator
      */
+    private Simulator m_sim;
 
-    public Cpu() {
-	reset();
+    public Cpu(Simulator sim) {
+    	reset();
+    	this.m_sim = sim;
     }
 
     /**
      * Reset the CPU to known initial values.
      */
     public void reset() {
+    	m_sp = 0x01ff;
+    	/* locations fffc and fffd hold the reset vector address */
+    	m_pc = 0xfffc;
     }
 
     /** 
@@ -47,6 +45,29 @@ public class Cpu {
      */
     public void nmiInterrupt() {
     }
+
+	/**
+	 * @return An address specified by the two bytes immediately following the
+	 *         Program Counter.
+	 */
+    private int readAddress() {
+    	return readAddress(m_pc);
+    }
+    
+    /**
+     * Read the two bytes located at <tt>addr</tt> and <tt>addr + 1</tt>,
+     * and return the address held there.
+     * 
+     * @param address
+     * @return The address specified in the two bytes at location <tt>addr</tt>
+     */
+    private int readAddress(int address) {
+    	return (m_sim.read(address)<<8 & m_sim.read(address+1));
+    }
+    
+    public Simulator getSimulator() {
+    	return m_sim;
+    }
     
 }
 

src/main/java/com/loomcom/j6502/Device.java

@@ -9,20 +9,32 @@ public abstract class Device {
     /** The memory range for this device. */
     private MemoryRange m_memoryRange;
 
-    /** Referece to the CPU, for interrupts. */
+    /** Reference to the CPU, for interrupts. */
     private Cpu m_cpu;
     
     public Device(MemoryRange range, Cpu cpu) {
-	m_memoryRange = range;
-	m_cpu = cpu;
+    	m_memoryRange = range;
+    	m_cpu = cpu;
+    }
+    
+    public MemoryRange getMemoryRange() {
+    	return m_memoryRange;
     }
 
-    public void generateInterrupt() {
-	m_cpu.interrupt();
+    public int getEndAddress() {
+		return m_memoryRange.getEndAddress();
+	}
+
+	public int getStartAddress() {
+		return m_memoryRange.getStartAddress();
+	}
+
+	public void generateInterrupt() {
+    	m_cpu.interrupt();
     }
 
     public void generateNonMaskableInterrupt() {
-	m_cpu.nmiInterrupt();
+    	m_cpu.nmiInterrupt();
     }
 
 }

src/main/java/com/loomcom/j6502/Simulator.java

@@ -7,24 +7,42 @@ import java.io.IOException;
  */
 public class Simulator {
     
-    CommandParser m_parser;
+	/**
+	 * Command-line parser used by this simulator.
+	 */
+	CommandParser m_parser;
+    
+	/**
+     * The CPU itself.
+     */
     Cpu m_cpu;
+
+    /**
+     * The Address Decoder responsible for routing memory
+     * read/write requests to the correct IO devices.
+     */
+    AddressDecoder m_adc;
     
     public Simulator() {
-	m_cpu = new Cpu();
-	m_parser = new CommandParser(System.in, System.out, this);
+    	m_cpu = new Cpu(this);
+    	m_parser = new CommandParser(System.in, System.out, this);
     }
 
     public void run() {
-	m_parser.run();
+    	m_parser.run();
     }
     
     public static void main(String[] args) {
-	new Simulator().run();
+    	new Simulator().run();
     }
 
     public void step() {
-	
     }
     
+    public int read(int address) {
+    	return 0;
+    }
+    
+    public void write(int address, int value) {
+    }
 }

src/test/java/com/loomcom/j6502/CpuTest.java

@@ -0,0 +1,78 @@
+/**
+ * 
+ */
+package com.loomcom.j6502;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @author sethm
+ *
+ */
+public class CpuTest {
+
+	@Test
+	public void testCpu() {
+		Cpu cpu = new Cpu(new Simulator());
+		assertNotNull(cpu);
+	}
+
+	@Test
+	public void testReset() {
+		fail("Not yet implemented");
+	}
+
+	@Test
+	public void testInterrupt() {
+		fail("Not yet implemented");
+	}
+
+	@Test
+	public void testNmiInterrupt() {
+		fail("Not yet implemented");
+	}
+	
+	@Test
+	public void testGetSimulator() {
+		Simulator sim = new Simulator();
+		Cpu cpu = new Cpu(sim);
+		assertEquals(sim, cpu.getSimulator());		
+	}
+
+}
+
+class MockSimulator extends Simulator {
+	public int step;
+	public boolean hasRun = false;
+	public Map<Integer,Integer> memory;
+
+	@Override
+	public int read(int address) {
+		Integer val = memory.get(new Integer(address));
+		if (val == null) {
+			throw new NullPointerException("Read from a non-existent memory location");
+		} else {
+			return val.intValue();
+		}
+	}
+
+	@Override
+	public void run() {
+		hasRun = true;
+	}
+
+	@Override
+	public void step() {
+		step++;
+	}
+
+	@Override
+	public void write(int address, int value) {
+		// TODO Auto-generated method stub
+		super.write(address, value);
+	}
+}