//////////////////////////////////////////////////////////////////////////////////////// // // 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 "NstBoardBmcCh001.hpp" namespace Nes { namespace Core { namespace Boards { namespace Bmc { #ifdef NST_MSVC_OPTIMIZE #pragma optimize("s", on) #endif void Ch001::SubReset(const bool hard) { Map( 0x8000U, 0xBFFFU, &Ch001::Peek_8000, &Ch001::Poke_8000 ); Map( 0x8000U, 0xFFFFU, &Ch001::Poke_8000 ); openBus = false; if (hard) NES_DO_POKE(8000,0x8000,0x00); } void Ch001::SubLoad(State::Loader& state,const dword baseChunk) { NST_VERIFY( baseChunk == (AsciiId<'B','P','F'>::V) ); if (baseChunk == AsciiId<'B','P','F'>::V) { while (const dword chunk = state.Begin()) { if (chunk == AsciiId<'I','R','Q'>::V) openBus = state.Read8() & 0x1; state.End(); } } } void Ch001::SubSave(State::Saver& state) const { state.Begin( AsciiId<'B','P','F'>::V ).Begin( AsciiId<'R','E','G'>::V ).Write8( openBus ).End().End(); } #ifdef NST_MSVC_OPTIMIZE #pragma optimize("", on) #endif NES_PEEK_A(Ch001,8000) { return !openBus ? prg.Peek( address - 0x8000 ) : (address >> 8); } NES_POKE_A(Ch001,8000) { openBus = ((address & 0x300) == 0x300); prg.SwapBanks ( (address >> 1 & 0x1FC) | ((address & 0x2) ? 0x0 : (address >> 1 & 0x2) | 0x0), (address >> 1 & 0x1FC) | ((address & 0x2) ? 0x1 : (address >> 1 & 0x2) | 0x1), (address >> 1 & 0x1FC) | ((address & 0x2) ? 0x2 : (address >> 1 & 0x2) | 0x0), (address & 0x800) ? (address >> 0 & 0x07C) | ((address & 0x6) ? 0x3 : 0x1) : (address >> 1 & 0x1FC) | ((address & 0x2) ? 0x3 : ((address >> 1 & 0x2) | 0x1)) ); ppu.SetMirroring( (address & 0x1) ? Ppu::NMT_H : Ppu::NMT_V ); } } } } }