Execution Trace Log

Introduces an execution trace window that will keep track of the most
recent 10000 execution steps. I'm not entirely happy with the
implementation, yet.

src/test/java/com/loomcom/symon/CpuIndexedIndirectModeTest.java

@@ -3,79 +3,80 @@ package com.loomcom.symon;
 import com.loomcom.symon.devices.Memory;
 
 import org.junit.*;
+
 import static org.junit.Assert.*;
 
 public class CpuIndexedIndirectModeTest {
 
-  protected Cpu cpu;
-  protected Bus bus;
-  protected Memory mem;
+    protected Cpu    cpu;
+    protected Bus    bus;
+    protected Memory mem;
 
-  @Before
-  public void runBeforeEveryTest() throws Exception {
-    this.cpu = new Cpu();
-    this.bus = new Bus(0x0000, 0xffff);
-    this.mem = new Memory(0x0000, 0x10000);
-    bus.addCpu(cpu);
-    bus.addDevice(mem);
+    @Before
+    public void runBeforeEveryTest() throws Exception {
+        this.cpu = new Cpu();
+        this.bus = new Bus(0x0000, 0xffff);
+        this.mem = new Memory(0x0000, 0x10000);
+        bus.addCpu(cpu);
+        bus.addDevice(mem);
 
-    // Load the reset vector.
-    bus.write(0xfffc, Bus.DEFAULT_LOAD_ADDRESS & 0x00ff);
-    bus.write(0xfffd, (Bus.DEFAULT_LOAD_ADDRESS & 0xff00)>>>8);
+        // Load the reset vector.
+        bus.write(0xfffc, Bus.DEFAULT_LOAD_ADDRESS & 0x00ff);
+        bus.write(0xfffd, (Bus.DEFAULT_LOAD_ADDRESS & 0xff00) >>> 8);
 
-    cpu.reset();
-    // Assert initial state
-    assertEquals(0, cpu.getAccumulator());
-    assertEquals(0, cpu.getXRegister());
-    assertEquals(0, cpu.getYRegister());
-    assertEquals(0x200, cpu.getProgramCounter());
-    assertEquals(0xff, cpu.getStackPointer());
-    assertEquals(0x20, cpu.getProcessorStatus());
-  }
+        cpu.reset();
+        // Assert initial state
+        assertEquals(0, cpu.getAccumulator());
+        assertEquals(0, cpu.getXRegister());
+        assertEquals(0, cpu.getYRegister());
+        assertEquals(0x200, cpu.getProgramCounter());
+        assertEquals(0xff, cpu.getStackPointer());
+        assertEquals(0x20, cpu.getProcessorStatus());
+    }
 
-  @Test
-  public void test_LDA() throws Exception {
-    bus.write(0x008c, 0x3f);
-    bus.write(0x008d, 0xc4);
-    bus.write(0xc43f, 0x45);
+    @Test
+    public void test_LDA() throws Exception {
+        bus.write(0x008c, 0x3f);
+        bus.write(0x008d, 0xc4);
+        bus.write(0xc43f, 0x45);
 
-    cpu.setXRegister(0x0c);
+        cpu.setXRegister(0x0c);
 
-    bus.loadProgram(0xa1, 0x80); // LDA ($80,X)
-    cpu.step(1);
+        bus.loadProgram(0xa1, 0x80); // LDA ($80,X)
+        cpu.step(1);
 
-    assertEquals(0x45, cpu.getAccumulator());
-  }
+        assertEquals(0x45, cpu.getAccumulator());
+    }
 
-  @Test
-  public void test_ORA() throws Exception {
-    bus.write(0x0012, 0x1f);
-    bus.write(0x0013, 0xc5);
-    bus.write(0xc51f, 0x31);
+    @Test
+    public void test_ORA() throws Exception {
+        bus.write(0x0012, 0x1f);
+        bus.write(0x0013, 0xc5);
+        bus.write(0xc51f, 0x31);
 
-    cpu.setXRegister(0x02);
-    cpu.setAccumulator(0x15);
+        cpu.setXRegister(0x02);
+        cpu.setAccumulator(0x15);
 
-    bus.loadProgram(0x01, 0x10); // ORA ($10,X)
-    cpu.step(1);
+        bus.loadProgram(0x01, 0x10); // ORA ($10,X)
+        cpu.step(1);
 
-    assertEquals(0x35, cpu.getAccumulator());
-    assertEquals(0x31, bus.read(0xc51f));
-  }
+        assertEquals(0x35, cpu.getAccumulator());
+        assertEquals(0x31, bus.read(0xc51f));
+    }
 
-  @Test
-  public void test_AND() throws Exception {
-    bus.write(0x0012, 0x1f);
-    bus.write(0x0013, 0xc5);
-    bus.write(0xc51f, 0x31);
+    @Test
+    public void test_AND() throws Exception {
+        bus.write(0x0012, 0x1f);
+        bus.write(0x0013, 0xc5);
+        bus.write(0xc51f, 0x31);
 
-    cpu.setXRegister(0x02);
-    cpu.setAccumulator(0x15);
+        cpu.setXRegister(0x02);
+        cpu.setAccumulator(0x15);
 
-    bus.loadProgram(0x21, 0x10); // AND ($10,X)
-    cpu.step(1);
+        bus.loadProgram(0x21, 0x10); // AND ($10,X)
+        cpu.step(1);
 
-    assertEquals(0x11, cpu.getAccumulator());
-    assertEquals(0x31, bus.read(0xc51f));
-  }
+        assertEquals(0x11, cpu.getAccumulator());
+        assertEquals(0x31, bus.read(0xc51f));
+    }
 }