//////////////////////////////////////////////////////////////////////////////////////// // // Nestopia - NES/Famicom emulator written in C++ // // Copyright (C) 2022 Rupert Carmichael // // 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 // //////////////////////////////////////////////////////////////////////////////////////// /* References: https://github.com/NovaSquirrel/Mesen-X/blob/master/Core/Mapper400.h */ #include "NstBoard.hpp" #include "NstBoardUnlRetX7Gbl.hpp" namespace Nes { namespace Core { namespace Boards { namespace Unlicensed { void RetX7Gbl::SubReset(bool) { Map( 0x7800U, 0x7FFFU, &RetX7Gbl::Poke_7800 ); Map( 0x8000U, 0xBFFFU, &RetX7Gbl::Poke_8000 ); Map( 0xC000U, 0xFFFFU, &RetX7Gbl::Poke_C000 ); regs[0] = 0x80; regs[1] = 0x00; UpdatePrg(); } void RetX7Gbl::SubLoad(State::Loader& state,const dword baseChunk) { if (baseChunk == AsciiId<'R','X','G'>::V) { while (const dword chunk = state.Begin()) { if (chunk == AsciiId<'R','E','G'>::V) { State::Loader::Data<3> data( state ); regs[0] = data[0]; regs[1] = data[1]; led = data[2]; } state.End(); } } UpdatePrg(); } void RetX7Gbl::SubSave(State::Saver& state) const { state.Begin( AsciiId<'R','X','G'>::V ); const byte data[3] = { regs[0], regs[1], led }; state.Begin( AsciiId<'R','E','G'>::V ).Write( data ).End(); state.End(); } void RetX7Gbl::UpdatePrg() { prg.SwapBank( (regs[0] & 0x78) | (regs[1] & 0x7) ); prg.SwapBank( (regs[0] & 0x78) | 0x7 ); if (regs[0] != 0x80) { ppu.SetMirroring( regs[0] & 0x20 ? Ppu::NMT_H : Ppu::NMT_V ); } } NES_POKE_D(RetX7Gbl,7800) { regs[0] = data; UpdatePrg(); } NES_POKE_D(RetX7Gbl,8000) { led = data; } NES_POKE_D(RetX7Gbl,C000) { regs[1] = data; UpdatePrg(); chr.SwapBank( (data >> 5) & 0x3 ); } } } } }