mirror of
https://github.com/0ldsk00l/nestopia.git
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113 lines
2.9 KiB
C++
113 lines
2.9 KiB
C++
////////////////////////////////////////////////////////////////////////////////////////
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//
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// Nestopia - NES/Famicom emulator written in C++
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//
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// Copyright (C) 2003-2008 Martin Freij
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//
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// This file is part of Nestopia.
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//
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// Nestopia is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// Nestopia is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Nestopia; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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////////////////////////////////////////////////////////////////////////////////////////
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#include "NstBoard.hpp"
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#include "NstBoardWaixing.hpp"
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namespace Nes
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{
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namespace Core
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{
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namespace Boards
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{
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namespace Waixing
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{
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("s", on)
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#endif
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void Sh2::SubReset(const bool hard)
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{
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selector[1] = 0;
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selector[0] = 0;
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chr.SetAccessor( this, &Sh2::Access_Chr );
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Mmc3::SubReset( hard );
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}
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void Sh2::SubSave(State::Saver& state) const
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{
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Mmc3::SubSave( state );
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state.Begin( AsciiId<'W','S','2'>::V ).Begin( AsciiId<'L','T','C'>::V ).Write8( (selector[0] >> 1) | (selector[1] & 0x2) ).End().End();
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}
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void Sh2::SubLoad(State::Loader& state,const dword baseChunk)
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{
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if (baseChunk == AsciiId<'W','S','2'>::V)
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{
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while (const dword chunk = state.Begin())
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{
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if (chunk == AsciiId<'L','T','C'>::V)
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{
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const uint data = state.Read8();
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selector[0] = data << 1 & 0x2;
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selector[1] = (data & 0x2) | 0x4;
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}
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state.End();
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}
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}
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else
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{
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Mmc3::SubLoad( state, baseChunk );
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}
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}
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#ifdef NST_MSVC_OPTIMIZE
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#pragma optimize("", on)
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#endif
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inline void Sh2::SwapChr(uint address) const
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{
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chr.Source( banks.chr[selector[address >> 12]] == 0 ).SwapBank<SIZE_4K>( address, banks.chr[selector[address >> 12]] >> 2 );
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}
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void NST_FASTCALL Sh2::UpdateChr(uint,uint) const
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{
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SwapChr( 0x0000 );
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SwapChr( 0x1000 );
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}
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NES_ACCESSOR(Sh2,Chr)
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{
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const uint data = chr.Peek( address );
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uint bank;
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switch (address & 0xFF8)
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{
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case 0xFD0: bank = (address >> 10 & 0x4) | 0x0; break;
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case 0xFE8: bank = (address >> 10 & 0x4) | 0x2; break;
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default: return data;
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}
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selector[address >> 12] = bank;
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SwapChr( address & 0x1000 );
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return data;
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}
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}
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}
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}
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}
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