public void EmulateCycles(long cycleLimit)
{
long cycleCounter = cycleLimit;
PerformanceTimer.Restart();
while (cycleCounter-- > 0)
{
CycleTimer.Start();
HandleTimers();
PPU.ProcessCycle();
APU.ProcessCycle();
if (CycleCooldown > 0)
{
if (ExecOpcode != null)
{
ExecOpcode.ExecuteTick();
}
CycleCooldown--;
if (CycleCooldown == 0 && ExecOpcode != null)
{
if (!HaltBug)
{
PC += (ushort)ExecOpcode.Length;
}
else
{
HaltBug = false;
}
ExecOpcode = null;
}
WaitForCycleFinish(CycleTimer, cycleCounter);
continue;
}
if (CheckForInterrupt())
{
HandleInterrupt();
WaitForCycleFinish(CycleTimer, cycleCounter);
continue;
}
if (Halted)
{
if (CycleCooldown == 0)
{
CycleCooldown += 4;
}
if (CycleCooldown > 0)
{
WaitForCycleFinish(CycleTimer, cycleCounter);
continue;
}
}
if (EINextInstruction)
{
EINextInstruction = false;
InterruptsEnabled = true;
}
Opcode opcode = Decoder.DecodeOpcode(this, Memory[PC]);
if (logTrace)
{
LogTrace(opcode);
}
if (opcode.TickAccurate)
{
ExecOpcode = opcode;
}
else
{
ExecOpcode = null;
}
if (!opcode.TickAccurate)
{
opcode.Execute();
if (!HaltBug)
{
PC += (ushort)opcode.Length;
}
else
{
HaltBug = false;
}
}
else
{
ExecOpcode.ExecuteTick();
}
CycleCooldown = opcode.Cycles - 1;
WaitForCycleFinish(CycleTimer, cycleCounter);
}
EndTime = PerformanceTimer.ElapsedTicks;
}