private bool OnMemoryChanged(Word addr, int count, bool written)
{
int stop = addr + count;
if (!sess.Machine.IsRunning) // Don't add boxes if machine is running. (They will be added only when stepping).
{
if (written)
{
for (int i = addr; i < stop; ++i)
{
ByteMarker newBox = new ByteMarker(i,
MEMORY_WRITTEN_COLOR,
sess.Machine.InstructionsExecuted);
hexDisplay.Boxes.Add(newBox);
}
}
else
{
for (int i = addr; i < stop; ++i)
{
ByteMarker newBox = new ByteMarker(i,
MEMORY_READ_COLOR,
sess.Machine.InstructionsExecuted);
hexDisplay.Boxes.Add(newBox);
}
}
}
if (breakpointsEnabled)
{
foreach (Breakpoint b in breakpoints)
{
int diff = b.Address - addr;
if (diff < 0 || diff > count)
{
continue; // This breakpoint is out of range.
}
if (b.Enabled)
{
if (b.BreakOnWrite == written || b.BreakOnRead == !written)
{
Log("Breakpoint hit at {0}.", addr);
return(true); // Tell machine to break.
}
}
}
}
return(false); // Allow VM execution to continue.
}
private void InitializeMachineDisplay()
{
if (sess?.Machine != null)
{
hexDisplay.Data = sess.Machine.Memory;
sess.Machine.MemoryChanged += OnMemoryChanged;
sess.Machine.RegisterChanged += OnRegisterChanged;
}
hexDisplay.Boxes.Clear();
pcMarker = new ByteMarker(sess.Machine.ProgramCounter,
PC_MARKER_COLOR,
sess.Machine.InstructionsExecuted,
false,
PC_MARKER_ID);
ResetTextboxColors();
}
private void UpdateMachineDisplay()
{
if (InvokeRequired)
{
Invoke(new Action(UpdateMachineDisplay));
return;
}
// Update labels.
Machine m = sess.Machine;
regATB.Text = m.RegisterA.ToString("X6");
regBTB.Text = m.RegisterB.ToString("X6");
regSTB.Text = m.RegisterS.ToString("X6");
regTTB.Text = m.RegisterT.ToString("X6");
regXTB.Text = m.RegisterX.ToString("X6");
regLTB.Text = m.RegisterL.ToString("X6");
pcTB.Text = m.ProgramCounter.ToString("X6");
switch (m.ConditionCode)
{
case ConditionCode.EqualTo:
ccCB.SelectedIndex = 1;
break;
case ConditionCode.LessThan:
ccCB.SelectedIndex = 0;
break;
case ConditionCode.GreaterThan:
ccCB.SelectedIndex = 2;
break;
}
// Cull old markers.
int instr = (int)m.InstructionsExecuted - 1;
int removed = hexDisplay.Boxes.RemoveWhere(bm =>
{
BigInteger?expiry = bm.ExpiresAfter;
bool ret = expiry.HasValue && instr > expiry.Value;
//Debug.WriteLineIf(ret, $"Culling byte marker {bm.ToString()}. Instr = {instr}.");
return(ret);
}
);
//Debug.WriteLine($"Removed {removed} byte markers.");
// Remove old program counter.
hexDisplay.Boxes.RemoveWhere(bm => bm.GetHashCode() == PC_MARKER_ID);
// Add new program counter marker.
pcMarker = new ByteMarker(m.ProgramCounter,
PC_MARKER_COLOR,
null,
false,
PC_MARKER_ID);
hexDisplay.Boxes.Add(pcMarker);
// Update memory display.
hexDisplay.Invalidate();
}
