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////////////////////////////////////////////////////////////////////////////////////////
//
// 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 "NstBoardWaixing.hpp"
namespace Nes
{
namespace Core
{
namespace Boards
{
namespace Waixing
{
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("s", on)
#endif
void Sh2::SubReset(const bool hard)
{
selector[1] = 0;
selector[0] = 0;
chr.SetAccessor( this, &Sh2::Access_Chr );
Mmc3::SubReset( hard );
}
void Sh2::SubSave(State::Saver& state) const
{
Mmc3::SubSave( state );
state.Begin( AsciiId<'W','S','2'>::V ).Begin( AsciiId<'L','T','C'>::V ).Write8( (selector[0] >> 1) | (selector[1] & 0x2) ).End().End();
}
void Sh2::SubLoad(State::Loader& state,const dword baseChunk)
{
if (baseChunk == AsciiId<'W','S','2'>::V)
{
while (const dword chunk = state.Begin())
{
if (chunk == AsciiId<'L','T','C'>::V)
{
const uint data = state.Read8();
selector[0] = data << 1 & 0x2;
selector[1] = data & 0x2 | 0x4;
}
state.End();
}
}
else
{
Mmc3::SubLoad( state, baseChunk );
}
}
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("", on)
#endif
inline void Sh2::SwapChr(uint address) const
{
chr.Source( banks.chr[selector[address >> 12]] == 0 ).SwapBank<SIZE_4K>( address, banks.chr[selector[address >> 12]] >> 2 );
}
void NST_FASTCALL Sh2::UpdateChr(uint,uint) const
{
SwapChr( 0x0000 );
SwapChr( 0x1000 );
}
NES_ACCESSOR(Sh2,Chr)
{
const uint data = chr.Peek( address );
uint bank;
switch (address & 0xFF8)
{
case 0xFD0: bank = (address >> 10 & 0x4) | 0x0; break;
case 0xFE8: bank = (address >> 10 & 0x4) | 0x2; break;
default: return data;
}
selector[address >> 12] = bank;
SwapChr( address & 0x1000 );
return data;
}
}
}
}
}
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