www.pudn.com > Nestopia137src.zip > NstBrd22211.cpp

//////////////////////////////////////////////////////////////////////////////////////// 
// 
// Nestopia - NES/Famicom emulator written in C++ 
// 
// Copyright (C) 2003-2007 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 "../NstMapper.hpp" 
#include "NstBrd22211.hpp" 
 
namespace Nes 
{ 
	namespace Core 
	{ 
		namespace Boards 
		{ 
			#ifdef NST_MSVC_OPTIMIZE 
			#pragma optimize("s", on) 
			#endif 
 
			Unl22211::Unl22211(Context& c,Type t) 
			: 
			Mapper (c,PROM_MAX_64K|CROM_MAX_32K|WRAM_DEFAULT), 
			type   (t) 
			{} 
 
			void Unl22211::SubReset(const bool hard) 
			{ 
				Map( 0x4100U,          &Unl22211::Peek_4100 ); 
				Map( 0x4100U, 0x4103U, &Unl22211::Poke_4100 ); 
				Map( 0x8000U, 0xFFFFU, &Unl22211::Poke_8000 ); 
 
				if (hard) 
				{ 
					for (uint i=0; i < 4; ++i) 
						regs[i] = 0; 
 
					NES_DO_POKE(8000,0x8000,0x00); 
				} 
			} 
 
			void Unl22211::SubLoad(State::Loader& state) 
			{ 
				while (const dword chunk = state.Begin()) 
				{ 
					if (chunk == AsciiId<'R','E','G'>::V) 
						state.Read( regs ); 
 
					state.End(); 
				} 
			} 
 
			void Unl22211::SubSave(State::Saver& state) const 
			{ 
				state.Begin( AsciiId<'R','E','G'>::V ).Write( regs ).End(); 
			} 
 
			#ifdef NST_MSVC_OPTIMIZE 
			#pragma optimize("", on) 
			#endif 
 
			NES_PEEK(Unl22211,4100) 
			{ 
				return (uint(regs[1]) ^ regs[2]) | (type == TYPE_SECURITY_2 ? 0x41 : 0x40); 
			} 
 
			NES_POKE_AD(Unl22211,4100) 
			{ 
				regs[address & 0x3] = data; 
			} 
 
			NES_POKE_D(Unl22211,8000) 
			{ 
				ppu.Update(); 
				prg.SwapBank( regs[2] >> 2 ); 
				chr.SwapBank( (type == TYPE_SECURITY_1) ? ((data^regs[2]) >> 3 & 0x2) | ((data^regs[2]) >> 5 & 0x1) : regs[2] ); 
			} 
		} 
	} 
}