mirror of
https://github.com/0ldsk00l/nestopia.git
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100 lines
2.6 KiB
C++
100 lines
2.6 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 "NstBoardBmc22Games.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 Bmc
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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 B22Games::SubReset(const bool hard)
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{
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if (hard)
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romSwitch = 0;
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else
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romSwitch ^= 1;
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if (romSwitch)
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{
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prg.SwapBanks<SIZE_16K,0x0000>( 0, 7 );
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ppu.SetMirroring( Ppu::NMT_V );
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}
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else
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{
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prg.SwapBanks<SIZE_16K,0x0000>( 8, 39 );
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}
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Map( 0x8000U, 0xFFFFU, &B22Games::Poke_8000 );
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}
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void B22Games::SubLoad(State::Loader& state,const dword baseChunk)
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{
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NST_VERIFY( baseChunk == (AsciiId<'B','2','G'>::V) );
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if (baseChunk == AsciiId<'B','2','G'>::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<'R','E','G'>::V)
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romSwitch = state.Read8() & 0x1;
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state.End();
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}
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}
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}
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void B22Games::SubSave(State::Saver& state) const
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{
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state.Begin( AsciiId<'B','2','G'>::V ).Begin( AsciiId<'R','E','G'>::V ).Write8( romSwitch ).End().End();
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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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NES_POKE_D(B22Games,8000)
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{
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if (romSwitch)
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{
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prg.SwapBank<SIZE_16K,0x0000>( data & 0x7 );
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}
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else
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{
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prg.SwapBanks<SIZE_16K,0x0000>( 8 + (data & 0x1F), (8 + (data & 0x1F)) | (~data >> 5 & 0x1) );
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ppu.SetMirroring( (data & 0x40) ? Ppu::NMT_V : Ppu::NMT_H );
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}
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}
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}
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}
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}
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}
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