//returns control of the main thread to the form.
private void EndRun(object sender, CompRunFinishedEventArgs e)
{
if (this.InvokeRequired)
{
this.BeginInvoke(new EndRunDelegate(EndRun), e);
return;
}
}//display a char form the Computer class.
//sets up the signal to the main thread that this thread is finished
public void onFinishExecution(CompRunFinishedEventArgs e)
{
EventHandler <CompRunFinishedEventArgs> handler = CompRunFinished;
if (handler != null)
{
handler(this, e);
}
}
//handles a step cycle for the computer
public void Step()
{
if (dontrun)
{
CompRunFinishedEventArgs arg1 = new CompRunFinishedEventArgs();
arg1.end = 4;
onFinishExecution(arg1);
return;
}
run = true;
//if (!trace) trace = true;
Loader.Log("Computer: Executing Step Cycle", false, false);
uint val = cpu.fetch();
uint insval = Registers.getPC();
Registers.setRegister(15, Registers.getPC() + 4);
Computer x = this;
Instruction ins = cpu.decode(val, ref x);
cpu.execute(ins);
CompRunFinishedEventArgs arg = new CompRunFinishedEventArgs();
arg.end = 3;
if (trace)
{
try
{
writeTrace(insval);
}
catch
{
}
}
TraceStep++;
onFinishExecution(arg);
run = false;
}
//update the panels on the main window. <e> contains a status code that will help determine which message to show the user, based on how execution endec
//i.e. clicking on stop, hitting breakpoints etc.
private void EndRun(CompRunFinishedEventArgs e)
{
if (e.end == 4)
{
RunBtn.Enabled = true;
MessageBox.Show("Error: Illegal step/run performed. The program has already executed. Please hit reset and try again.");
return;
}
Loader.Log("Form1: Step/Execute cycle finished.", false, false);
uint entry = comp.Registers.getPC();
setRegister(15, entry);
SetProgMode();
int x1 = 0;
int fi = 1;
while (fi < 5)
{
uint flag = comp.Registers.cpsr;
bool fl = Memory.TestBit(32 - fi, flag);
if (fl == true)
{
flagView.Rows[0].Cells[fi - 1].Value = "1";
}
else
{
flagView.Rows[0].Cells[fi - 1].Value = "0";
}
fi++;
}
if (Memory.TestBit(7, comp.Registers.cpsr))
{
flagView.Rows[0].Cells[4].Value = "1";
}
else
{
flagView.Rows[0].Cells[4].Value = "0";
}
while (x1 < 15)
{
uint val = comp.getReg(x1);
setRegister(x1, val);
x1++;
}
var x = disassemblyView.Rows;
disassemblyView.ClearSelection();
bool selected = false;
foreach (DataGridViewRow y in x)
{
if (y.Cells[0].Value == null)
{
continue;
}
string iii = (string)y.Cells[0].Value;
var nupoint = UInt32.Parse(iii.Substring(2), System.Globalization.NumberStyles.HexNumber);
if (nupoint == entry)
{
int rindex = y.Index;
if (rindex > 2)
{
selected = true;
if (rindex != disassemblyView.Rows[disassemblyView.Rows.Count - 1].Index)
{
disassemblyView.FirstDisplayedScrollingRowIndex = rindex - 2;
}
else
{
disassemblyView.FirstDisplayedScrollingRowIndex = disassemblyView.Rows.Count - 4;
}
}
else
{
selected = true;
}
y.Selected = true;
disassemblyView.Update();
break;
}
}
if (!selected)
{
disassemblyView.FirstDisplayedScrollingRowIndex = disassemblyView.Rows.Count - 4;
disassemblyView.Rows[disassemblyView.Rows.Count - 1].Selected = true;
}
if (e.end == 0)
{
MessageBox.Show("Execution complete");
opModePanel.Text = "Operating Mode: None";
comp.resetCounter();
}
else if (e.end == 1)
{
MessageBox.Show("Breakpoint Reached");
opModePanel.Text = "Operating Mode: Breakpoint";
}
else if (e.end == 2)
{
MessageBox.Show("Execution stopped by user");
opModePanel.Text = "Operating Mode: User Stop";
}
else if (e.end == 3)
{
opModePanel.Text = "Operating Mode: None";
}
else if (e.end == 4)
{
MessageBox.Show("Error: Illegal step/run performed. The program has already executed. Please hit reset and try again.");
}
else if (e.end == 5)
{
MessageBox.Show("Internal simulator error. Run aborted.");
}
addStack();
resetMemory(entry);
RunBtn.Enabled = true;
}
//handles a run cycle for the computer
public void Run()
{
if (dontrun)
{
CompRunFinishedEventArgs arg1 = new CompRunFinishedEventArgs();
arg1.end = 4;
onFinishExecution(arg1);
return;
}
run = true;
interrupt = false;
endrun = false;
Loader.Log("Computer: Executing Run Cycle", false, false);
uint val = 9001;
try
{
//if (!trace) { trace = true; sw = new StreamWriter("trace.log"); }
while (val != 0 && stop == false && interrupt == false && halt == false)
{
val = cpu.fetch();
uint insval = Registers.getPC();
if (insval == RAM.begin2)
{
tr = true;
}
Registers.setRegister(15, Registers.getPC() + 4);
Computer x = this;
Instruction ins = cpu.decode(val, ref x);
if (val != uint.MaxValue)
{
cpu.execute(ins);
}
else
{
Registers.setRegister(15, Registers.getPC() - 4);
stop = true;
}
if (trace && val != uint.MaxValue && val != 0)
{
try
{
writeTrace(insval);
}
catch
{
}
}
TraceStep++;
if (cpu.irq == 1 && !Memory.TestBit(7, Registers.cpsr))
{//toggle the IRQ bit on and process input
Registers.swapRegisters(2);
cpu.irq = 0;
Memory.SetBitinInt(Registers.cpsr, 7, true);
}
}
if (val != uint.MaxValue)
{
Registers.setRegister(15, Registers.getPC() - 4);
}
CompRunFinishedEventArgs arg = new CompRunFinishedEventArgs();
if (interrupt)
{
arg.end = 4;
}
if (!interrupt)
{
if (val == uint.MaxValue)
{
Loader.Log("Computer: Breakpoint hit", false, false);
stop = false;
arg.end = 1;
}
else
{
arg.end = 0;
endrun = true;
halt = false;
if (stop)
{
Loader.Log("Computer: Stopping at user's command.", false, false);
arg.end = 2;
stop = false;
}
if (arg.end == 0)
{
dontrun = true;
}
}
}
interrupt = false;
run = false;
onFinishExecution(arg);
}
catch
{
interrupt = false;
run = false;
stop = false;
CompRunFinishedEventArgs arg = new CompRunFinishedEventArgs();
arg.end = 5;
onFinishExecution(arg);
}
}