////////////////////////////////////////////////////////////////////////////////////////
//
// 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
//
////////////////////////////////////////////////////////////////////////////////////////

#include "NstBoard.hpp"
#include "NstBoardBmc76in1.hpp"

namespace Nes
{
	namespace Core
	{
		namespace Boards
		{
			namespace Bmc
			{
				void B76in1::SubReset(const bool hard)
				{
					Map( 0x8000U, 0xFFFFU, &B76in1::Poke_8000 );

					if (hard)
					{
						regs[0] = 0;
						regs[1] = 0;

						NES_DO_POKE(8000,0x8000,0x00);
					}
				}

				void B76in1::SubLoad(State::Loader& state,const dword baseChunk)
				{
					NST_VERIFY( baseChunk == (AsciiId<'B','7','6'>::V) );

					if (baseChunk == AsciiId<'B','7','6'>::V)
					{
						while (const dword chunk = state.Begin())
						{
							if (chunk == AsciiId<'R','E','G'>::V)
							{
								State::Loader::Data<2> data( state );

								regs[0] = data[0];
								regs[1] = data[1];
							}

							state.End();
						}
					}
				}

				void B76in1::SubSave(State::Saver& state) const
				{
					state.Begin( AsciiId<'B','7','6'>::V ).Begin( AsciiId<'R','E','G'>::V ).Write16( regs[0] | uint(regs[1]) << 8 ).End().End();
				}

				NES_POKE_AD(B76in1,8000)
				{
					regs[address & 0x1] = data;

					uint bank =
					(
						(regs[0] >> 1 & 0x0F) |
						(regs[0] >> 3 & 0x10) |
						(regs[1] << 5 & 0x20)
					);

					if (regs[0] & 0x20)
					{
						bank = (bank << 1) | (regs[0] & 0x1);
						prg.SwapBanks<SIZE_16K,0x0000>( bank, bank );
					}
					else
					{
						prg.SwapBank<SIZE_32K,0x0000>( bank );
					}

					ppu.SetMirroring( (regs[0] & 0x40) ? Ppu::NMT_V : Ppu::NMT_H );
				}
			}
		}
	}
}
