private void Cycle(bool noPpu)
 {
     _apuCatchCycles += _apuCyclesPerMaster * 2;
     if (_joypadStrobe)
     {
         _joypad1Val = _joypad1State;
         _joypad2Val = _joypad2State;
     }
     if (_hdmaTimer > 0)
     {
         _hdmaTimer -= 2;
     }
     else if (_dmaBusy)
     {
         HandleDma();
     }
     else if (XPos < 536 || XPos >= 576)
     {
         CpuCycle();
     }
     if (YPos == _vTimer && _vIrqEnabled)
     {
         if (!_hIrqEnabled)
         {
             if (XPos == 0)
             {
                 _inIrq        = true;
                 CPU.IrqWanted = true;
             }
         }
         else
         {
             if (XPos == _hTimer * 4)
             {
                 _inIrq        = true;
                 CPU.IrqWanted = true;
             }
         }
     }
     else if (XPos == _hTimer * 4 && _hIrqEnabled && !_vIrqEnabled)
     {
         _inIrq        = true;
         CPU.IrqWanted = true;
     }
     if (XPos == 1024)
     {
         _inHblank = true;
         if (!_inVblank)
         {
             HandleHdma();
         }
     }
     else if (XPos == 0)
     {
         _inHblank = false;
         PPU.CheckOverscan(YPos);
     }
     else if (XPos == 512 && !noPpu)
     {
         PPU.RenderLine(YPos);
     }
     if (YPos == (PPU.FrameOverscan ? 240 : 225) && XPos == 0)
     {
         _inNmi    = true;
         _inVblank = true;
         if (_autoJoyRead)
         {
             _autoJoyBusy  = true;
             _autoJoyTimer = 4224;
             DoAutoJoyRead();
         }
         if (_nmiEnabled)
         {
             CPU.NmiWanted = true;
         }
     }
     else if (YPos == 0 && XPos == 0)
     {
         _inNmi    = false;
         _inVblank = false;
         InitHdma();
     }
     if (_autoJoyBusy)
     {
         _autoJoyTimer -= 2;
         if (_autoJoyTimer == 0)
         {
             _autoJoyBusy = false;
         }
     }
     XPos += 2;
     if (XPos == 1364)
     {
         XPos = 0;
         YPos++;
         if (YPos == 262)
         {
             CatchUpApu();
             YPos = 0;
         }
     }
 }