//////////////////////////////////////////////////////////////////////////////////////// // // 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 "../NstDipSwitches.hpp" #include "NstBoardBmc8157.hpp" namespace Nes { namespace Core { namespace Boards { namespace Bmc { #ifdef NST_MSVC_OPTIMIZE #pragma optimize("s", on) #endif B8157::CartSwitches::CartSwitches() : mode(0x100) {} inline void B8157::CartSwitches::SetMode(uint value) { mode = value ? 0x100 : 0x000; } inline uint B8157::CartSwitches::GetMode() const { return mode; } uint B8157::CartSwitches::GetValue(uint) const { return mode ? 0 : 1; } void B8157::CartSwitches::SetValue(uint,uint value) { mode = value ? 0x000 : 0x100; } uint B8157::CartSwitches::NumDips() const { return 1; } uint B8157::CartSwitches::NumValues(uint) const { return 2; } cstring B8157::CartSwitches::GetDipName(uint) const { return "Mode"; } cstring B8157::CartSwitches::GetValueName(uint,uint i) const { return i ? "20-in-1" : "4-in-1"; } B8157::Device B8157::QueryDevice(DeviceType type) { if (type == DEVICE_DIP_SWITCHES) return &cartSwitches; else return Board::QueryDevice( type ); } void B8157::SubReset(const bool hard) { Map( 0x8000U, 0xFFFFU, &B8157::Peek_8000, &B8157::Poke_8000 ); trash = 0x00; if (hard) NES_DO_POKE(8000,0x8000,0x00); } void B8157::SubLoad(State::Loader& state,const dword baseChunk) { NST_VERIFY( baseChunk == (AsciiId<'B','8','1'>::V) ); if (baseChunk == AsciiId<'B','8','1'>::V) { while (const dword chunk = state.Begin()) { if (chunk == AsciiId<'R','E','G'>::V) { const uint data = state.Read8(); trash = (data & 0x2) ? 0xFF : 0x00; cartSwitches.SetMode( data & 0x1 ); } state.End(); } } } void B8157::SubSave(State::Saver& state) const { state.Begin( AsciiId<'B','8','1'>::V ).Begin( AsciiId<'R','E','G'>::V ).Write8( (cartSwitches.GetMode() ? 0x1U : 0x0U) | (trash ? 0x2U : 0x0U) ).End().End(); } #ifdef NST_MSVC_OPTIMIZE #pragma optimize("", on) #endif NES_PEEK_A(B8157,8000) { return prg.Peek( address - 0x8000 ) | trash; } NES_POKE_A(B8157,8000) { trash = (address & cartSwitches.GetMode()) ? 0xFF : 0x00; prg.SwapBanks ( (address >> 2 & 0x18) | (address >> 2 & 0x7), (address >> 2 & 0x18) | ((address & 0x200) ? 0x7 : 0x0) ); ppu.SetMirroring( (address & 0x2) ? Ppu::NMT_H : Ppu::NMT_V ); } } } } }