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 "NstBoardSunsoftDcs.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 Sunsoft
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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 Dcs::SubReset(const bool hard)
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{
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counter = SIGNAL;
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prgBank = 0;
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S4::SubReset( hard );
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prg.SwapBanks<SIZE_16K,0x0000>( 0x0, 0x7 );
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Map( 0x6000U, &Dcs::Poke_6000 );
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Map( 0x8000U, 0xBFFFU, &Dcs::Peek_8000 );
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Map( 0xF000U, 0xFFFFU, &Dcs::Poke_F000 );
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}
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void Dcs::SubLoad(State::Loader& state,const dword baseChunk)
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{
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if (baseChunk == AsciiId<'S','D','C'>::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<'D','B','C'>::V)
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{
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prgBank = state.Read8() & 0xF;
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counter = state.Read16();
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if (counter > SIGNAL)
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counter = SIGNAL;
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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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S4::SubLoad( state, baseChunk );
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}
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}
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void Dcs::SubSave(State::Saver& state) const
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{
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S4::SubSave( state );
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state.Begin( AsciiId<'S','D','C'>::V ).Begin( AsciiId<'D','B','C'>::V ).Write8( prgBank ).Write16( counter ).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(Dcs,6000)
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{
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if (data == 0x00)
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{
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counter = 0;
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prg.SwapBank<SIZE_16K,0x0000>( prgBank );
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}
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}
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NES_PEEK_A(Dcs,8000)
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{
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if (const uint bank = ((prgBank & 0x8 && counter < SIGNAL && ++counter == SIGNAL) ? ((prgBank & 0x7) | 0x10) : 0))
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prg.SwapBank<SIZE_16K,0x0000>( bank & 0xF );
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return prg.Peek( address - 0x8000 );
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}
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NES_POKE_D(Dcs,F000)
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{
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prgBank = (data & 0x7) | (~data & 0x8);
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prg.SwapBank<SIZE_16K,0x0000>( prgBank );
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}
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}
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}
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}
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}
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