Tooltip Text and Minor Enhancements

- Added tooltip text to status panel.
- Memory is no longer cleared on reset.
- Console can now receive key-strokes even while the simulator is
  stopped (for single-stepping programs that require interaction)
- Updated screenshots with bug-fixed version.

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

@@ -270,10 +270,9 @@ public class Simulator implements Observer {
         }
 
         try {
-            logger.log(Level.INFO, "Cold reset requested. Resetting CPU and clearing memory.");
+            logger.log(Level.INFO, "Reset requested. Resetting CPU.");
             // Reset and clear memory
             cpu.reset();
-            ram.fill(0x00);
             // Clear the console.
             console.reset();
             // Reset the trace log.
@@ -440,8 +439,6 @@ public class Simulator implements Observer {
 
             SwingUtilities.invokeLater(new Runnable() {
                 public void run() {
-                    // Tell the console to start handling key presses
-                    console.startListening();
                     // Don't allow step while the simulator is running
                     stepButton.setEnabled(false);
                     menuBar.simulatorDidStart();

src/main/java/com/loomcom/symon/ui/Console.java

@@ -55,9 +55,6 @@ public class Console extends JTerminal implements KeyListener, MouseListener {
     // If true, send CRLF (0x0d 0x0a) whenever CR is typed
     private static final boolean SEND_CR_LF_FOR_CR    = false;
 
-    // If true, the console is actively listening for key input.
-    private boolean isListening;
-
     private FifoRingBuffer<Character> typeAheadBuffer;
 
     public Console(int columns, int rows, Font font) {
@@ -65,7 +62,6 @@ public class Console extends JTerminal implements KeyListener, MouseListener {
         // A small type-ahead buffer, as might be found in any real
         // VT100-style serial terminal.
         this.typeAheadBuffer = new FifoRingBuffer<Character>(128);
-        this.isListening = false;
         setBorderWidth(DEFAULT_BORDER_WIDTH);
         addKeyListener(this);
         addMouseListener(this);
@@ -87,14 +83,6 @@ public class Console extends JTerminal implements KeyListener, MouseListener {
         repaint();
     }
 
-    public void startListening() {
-        this.isListening = true;
-    }
-
-    public void stopListening() {
-        this.isListening = false;
-    }
-
     /**
      * Returns true if a key has been pressed since the last time input was read.
      *
@@ -110,23 +98,21 @@ public class Console extends JTerminal implements KeyListener, MouseListener {
      * @param keyEvent The key event.
      */
     public void keyTyped(KeyEvent keyEvent) {
-        if (isListening) {
-            char keyTyped = keyEvent.getKeyChar();
+        char keyTyped = keyEvent.getKeyChar();
 
-            if (SWAP_CR_AND_LF) {
-                if (keyTyped == 0x0a) {
-                    keyTyped = 0x0d;
-                } else if (keyTyped == 0x0d) {
-                    keyTyped = 0x0a;
-                }
+        if (SWAP_CR_AND_LF) {
+            if (keyTyped == 0x0a) {
+                keyTyped = 0x0d;
+            } else if (keyTyped == 0x0d) {
+                keyTyped = 0x0a;
             }
+        }
 
-            if (SEND_CR_LF_FOR_CR && keyTyped == 0x0d) {
-                typeAheadBuffer.push((char) 0x0d);
-                typeAheadBuffer.push((char) 0x0a);
-            } else {
-                typeAheadBuffer.push(keyTyped);
-            }
+        if (SEND_CR_LF_FOR_CR && keyTyped == 0x0d) {
+            typeAheadBuffer.push((char) 0x0d);
+            typeAheadBuffer.push((char) 0x0a);
+        } else {
+            typeAheadBuffer.push(keyTyped);
         }
 
         keyEvent.consume();

src/main/java/com/loomcom/symon/ui/StatusPanel.java

@@ -122,6 +122,18 @@ public class StatusPanel extends JPanel {
         overflowFlagLabel = new JLabel(overflowOff, JLabel.CENTER);
         negativeFlagLabel = new JLabel(negativeOff, JLabel.CENTER);
 
+        // Add tool-tip text
+        carryFlagLabel.setToolTipText("Carry: The last operation caused an overflow " +
+                                      "from bit 7 of the result or an underflow from bit 0");
+        zeroFlagLabel.setToolTipText("Zero: The result of the last operation was 0");
+        irqDisableFlagLabel.setToolTipText("Interrupt Disable: Processor will not respond to IRQ");
+        decimalModeFlagLabel.setToolTipText("Decimal Mode");
+        breakFlagLabel.setToolTipText("Break: BRK instruction occurred");
+        overflowFlagLabel.setToolTipText("Overflow: The result of the last operation was " +
+                                         "an invalid 2's complement result");
+        negativeFlagLabel.setToolTipText("Negative: The result of the last operation set bit 7");
+
+
         statusFlagsPanel.add(negativeFlagLabel);
         statusFlagsPanel.add(overflowFlagLabel);
         statusFlagsPanel.add(breakFlagLabel);
@@ -139,6 +151,11 @@ public class StatusPanel extends JPanel {
         xLabel = makeLabel("X");
         yLabel = makeLabel("Y");
 
+        statusFlagsLabel.setToolTipText("6502 Processor Status Flags");
+        opcodeLabel.setToolTipText("Instruction Register");
+        pcLabel.setToolTipText("Program Counter");
+        spLabel.setToolTipText("Stack Pointer");
+
         opcodeField = makeTextField(LARGE_TEXT_FIELD_SIZE);
         pcField = makeTextField(LARGE_TEXT_FIELD_SIZE);
         spField = makeTextField(SMALL_TEXT_FIELD_SIZE);