protected virtual void OnInstructionExecuted(NESEventArgs e)
{
if (InstructionExecuted != null)
{
InstructionExecuted.Invoke(this, e);
Execution.WaitOne();
}
}
public void Execute(byte[] program, CancellationToken cancellationToken)
{
_memory.Load(program);
_dissassembler.SetPointer();
while (true)
{
var instruction = _dissassembler.GetNextInstruction();
if (cancellationToken.IsCancellationRequested || instruction == null)
{
break;
}
instruction.Execute(_memory, _registers);
InstructionExecuted?.Invoke(this, instruction);
}
}
// Event invocation, break handling and so on
private void Execute(IExecutionEnvironment environment, IList <IInstruction> instructions, int waitMs)
{
Reset();
IsFinished = false;
IsAborted = false;
IsHalted = false;
ExecutionStarted?.Invoke(this, new EventArgs());
while (!IsFinished && !IsAborted)
{
// Set the instruction for this cycle
SetCurrentInstruction(environment, instructions);
// Check if instruction is marked as a breakpoint and if it is active
if (_breakPoints.ContainsKey(CurrentInstruction) && _breakPoints[CurrentInstruction])
{
BreakExecution(CurrentInstruction, instructions.IndexOf(CurrentInstruction));
}
else if (IsHalted)
{
// If instruction is not a breakpoint and IsHalted was already true, we stepped one instruction further
ExecutionStepped?.Invoke(this, new InstructionExecuteEventArgs(CurrentInstruction, CurrentInstructionIndex));
}
// Halt the thread if a breakpoint was reached
if (IsHalted)
{
try
{
Thread.Sleep(Timeout.Infinite);
}
catch (ThreadInterruptedException)
{
// Through an interrupt, the thread will continue from here
}
catch (ThreadAbortException)
{
// The further execution will be aborted
IsAborted = true;
break;
}
}
// Execute instruction
InstructionExecuting?.Invoke(this, new InstructionExecuteEventArgs(CurrentInstruction, CurrentInstructionIndex));
Thread.Sleep(waitMs);
try
{
ExecuteInternal(environment, instructions);
}
catch (Exception e)
{
// Abort execution when the instruction throws
Logger.Log(LogLevel.Fatal, e.Message);
AbortExecution(true);
break;
}
InstructionExecuted?.Invoke(this, new InstructionExecuteEventArgs(CurrentInstruction, CurrentInstructionIndex));
}
if (!IsAborted)
{
ExecutionFinished?.Invoke(this, new EventArgs());
}
}
internal void NotifyInstructionExecuted()
{
InstructionExecuted?.Invoke(Cpu, new InstructionExecutedEventArgs(Opcode));
}