////////////////////////////////////////////////////////////////////////////////////////
//
// Nestopia - NES/Famicom emulator written in C++
//
// Copyright (C) 2003-2008 Martin Freij
//
// This file is part of Nestopia.
//
// Nestopia is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// Nestopia is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Nestopia; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
////////////////////////////////////////////////////////////////////////////////////////

#ifndef NST_BOARD_TENGEN_RAMBO1_H
#define NST_BOARD_TENGEN_RAMBO1_H

#ifdef NST_PRAGMA_ONCE
#pragma once
#endif

#include "../NstTimer.hpp"

namespace Nes
{
	namespace Core
	{
		namespace Boards
		{
			namespace Tengen
			{
				class Rambo1 : public Board
				{
				public:

					explicit Rambo1(const Context&);

				protected:

					void SubReset(bool);
					virtual void UpdateChr() const;

				private:

					void SubSave(State::Saver&) const;
					void SubLoad(State::Loader&,dword);
					void UpdatePrg();
					void Sync(Event,Input::Controllers*);

					NES_DECL_POKE( 8000 );
					NES_DECL_POKE( 8001 );
					NES_DECL_POKE( C000 );
					NES_DECL_POKE( C001 );
					NES_DECL_POKE( E000 );
					NES_DECL_POKE( E001 );

					struct Regs
					{
						void Reset();

						byte chr[8];
						byte prg[3];
						byte ctrl;
					};

					struct Irq
					{
						Irq(Cpu&,Ppu&);

						void Update();

						enum
						{
							M2_CLOCK   = 4,
							A12_FILTER = 16,
							IRQ_DELAY  = 2,
							SOURCE_PPU = 0x0,
							SOURCE_CPU = 0x1,
							SOURCE     = 0x1
						};

						struct Unit
						{
							void Reset(bool);
							bool Clock();

							uint count;
							uint latch;
							ibool reload;
							ibool enabled;
						};

						typedef Timer::A12<Unit&,A12_FILTER,IRQ_DELAY> A12;
						typedef Timer::M2<Unit&,M2_CLOCK> M2;

						Unit unit;
						A12 a12;
						M2 m2;
					};

				protected:

					Regs regs;

				private:

					Irq irq;
				};
			}
		}
	}
}

#endif
