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