public void resetFieldValues() {
axField.setText("0");
bxField.setText("0");
cxField.setText("0");
dxField.setText("0");
csField.setText(Integer.toString(simulator.getMemory().codeSegmentStart));
ipField.setText("0");
dsField.setText(Integer.toString(simulator.getMemory().dataSegmentStart));
siField.setText("0");
ssField.setText(Integer.toString(simulator.getMemory().stackSegmentStart));
spField.setText("1000");
bpField.setText("1000");
}
/**
* Adds rows to the data segment table. Data is retrieved from the memory <code>Memory</code>
* class
*/
public void addDataInstructions() {
for (int i = 0; i < simulator.getMemory().dataSegmentStart; i++) {
int value = simulator.getMemory().getValue(simulator.getMemory().dataSegmentStart + i);
if (value != 0) {
String[] temp = {
simulator.getMemory().dataSegmentStart + (i) + " (" + simulator.getGlobalName(i) + ")",
value + ""
};
dataModel.addRow(temp);
} else {
break;
}
}
}
/**
* This is used by the Observer design pattern. This method is called when there is a change has
* been notified
*/
@Override
public void update(Observable o, Object arg) {
if (o instanceof ManageInstructions) {
clearTextFields();
for (int i = 0; i < textFieldContainer.size(); i++) {
String registerName = textFieldContainer.get(i).getName();
if (!textFieldContainer
.get(i)
.getText()
.equals(Integer.toString(simulator.getRegisters().getRegisterValue(registerName)))) {
textFieldContainer.get(i).setBackground(new Color(51, 204, 255));
}
textFieldContainer
.get(i)
.setText(Integer.toString(simulator.getRegisters().getRegisterValue(registerName)));
}
csField.setText(Integer.toString(simulator.getMemory().codeSegmentStart));
if (Integer.toString(simulator.getProgramCounter()) != ipField.getText()) {
ipField.setBackground(new Color(51, 204, 255));
}
ipField.setText(Integer.toString((simulator.getProgramCounter() * 2) + 2));
dsField.setText(Integer.toString(simulator.getMemory().dataSegmentStart));
ssField.setText(Integer.toString(simulator.getMemory().stackSegmentStart));
}
if (o instanceof MemoryStack) {
ArrayList stack = simulator.getMemory().getStack().stack();
while (stackModel.getRowCount() > 0) {
stackModel.removeRow(0);
}
int bp = simulator.getMemory().getStack().oldbp;
for (int i = 0; i < stack.size(); i++) {
String operator = "+";
int n = (stack.size() - i) * 2;
if (i < bp && bp != 0) {
operator = "+";
n = (bp - i) * 2;
}
if (bp == 0) {
operator = "-";
}
if (i > bp && bp != 0) {
operator = "-";
}
if (i == bp && bp != 0) {
n = 0;
}
String[] stackRow = {"bp " + operator + " " + n, stack.get(i).toString()};
stackModel.addRow(stackRow);
}
}
}
/**
* Loads the program in the assembly text area and passes to the CPU for processing Creates the
* data segment, stack segment and code segment
*/
public void assemblyProgram() { // TODO Auto-generated method stub
resetEverything();
simulator.reset();
simulator.loadProgram(new StringBuffer(editorPane.getText()));
if (simulator.canExecute()) {
JPanel dataTable = new JPanel(new BorderLayout());
JLabel dataLabel = new JLabel("Data Segment");
dataLabel.setForeground(new Color(23, 88, 154));
dataLabel.setFont(new Font("Helvetica", Font.BOLD, 14));
dataTable.add(dataLabel, BorderLayout.NORTH);
dataTable.add(createDataTable(), BorderLayout.SOUTH);
memoryPanel.add(dataTable);
dataTable.setBackground(new Color(246, 253, 219));
JPanel codeTable = new JPanel(new BorderLayout());
JLabel codeLabel = new JLabel("Code Segment");
codeLabel.setFont(new Font("Helvetica", Font.BOLD, 14));
codeLabel.setForeground(new Color(23, 88, 154));
codeTable.add(codeLabel, BorderLayout.NORTH);
codeTable.add(createTable(true), BorderLayout.SOUTH);
memoryPanel.add(codeTable);
codeTable.setBackground(new Color(246, 253, 219));
JPanel stackTable = new JPanel(new BorderLayout());
JLabel stackLabel = new JLabel("Stack Segment");
stackLabel.setForeground(new Color(23, 88, 154));
stackLabel.setFont(new Font("Helvetica", Font.BOLD, 14));
stackTable.add(stackLabel, BorderLayout.NORTH);
stackTable.add(createStackTable(), BorderLayout.SOUTH);
memoryPanel.add(stackTable);
memoryPanel.setBackground(new Color(246, 253, 219));
stackTable.setBackground(new Color(246, 253, 219));
addInstructions();
addDataInstructions();
repaint();
}
}
/**
* Retrieves program counter
*
* @param program assembly language program
* @return (int) program counter
*/
public void addInstructions() {
for (int i = 0; i < simulator.getCodeSegmentFile().size(); i++) {
boolean end = false;
String instruction = simulator.getCodeSegmentFile().get(i).toString();
String label = "";
String endlabel = "";
Set<String> table = SymbolTable.getInstance().getSymbolTable().keySet();
for (String key : table) {
int location = SymbolTable.getInstance().getLocation(key);
String type = SymbolTable.getInstance().getType(key);
if (location == i && type.equals("code")) {
label = " " + key;
}
if (location > (simulator.getCodeSegmentFile().size() - 1)
&& i == simulator.getCodeSegmentFile().size() - 1) {
endlabel = key;
end = true;
}
}
String[] temp = {
(simulator.getCodeSegmentFile().get(i).getSize() * (i + 1)) + " " + label, instruction
};
model.addRow(temp);
if (end) {
String[] endTemp = {
(simulator.getCodeSegmentFile().get(i).getSize() * (i + 1) + 2) + " " + endlabel, " "
};
model.addRow(endTemp);
}
}
}
public AssignmentFillIn getAssignmentFillIn() {
// TODO Auto-generated method stub
return simulator.getAssignmentFillIn();
}