mirror of
https://github.com/0ldsk00l/nestopia.git
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151 lines
3.7 KiB
C++
151 lines
3.7 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 "../NstDipSwitches.hpp"
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#include "NstBoardBmc8157.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 Bmc
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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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B8157::CartSwitches::CartSwitches()
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: mode(0x100) {}
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inline void B8157::CartSwitches::SetMode(uint value)
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{
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mode = value ? 0x100 : 0x000;
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}
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inline uint B8157::CartSwitches::GetMode() const
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{
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return mode;
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}
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uint B8157::CartSwitches::GetValue(uint) const
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{
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return mode ? 0 : 1;
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}
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void B8157::CartSwitches::SetValue(uint,uint value)
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{
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mode = value ? 0x000 : 0x100;
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}
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uint B8157::CartSwitches::NumDips() const
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{
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return 1;
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}
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uint B8157::CartSwitches::NumValues(uint) const
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{
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return 2;
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}
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cstring B8157::CartSwitches::GetDipName(uint) const
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{
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return "Mode";
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}
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cstring B8157::CartSwitches::GetValueName(uint,uint i) const
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{
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return i ? "20-in-1" : "4-in-1";
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}
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B8157::Device B8157::QueryDevice(DeviceType type)
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{
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if (type == DEVICE_DIP_SWITCHES)
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return &cartSwitches;
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else
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return Board::QueryDevice( type );
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}
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void B8157::SubReset(const bool hard)
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{
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Map( 0x8000U, 0xFFFFU, &B8157::Peek_8000, &B8157::Poke_8000 );
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trash = 0x00;
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if (hard)
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NES_DO_POKE(8000,0x8000,0x00);
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}
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void B8157::SubLoad(State::Loader& state,const dword baseChunk)
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{
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NST_VERIFY( baseChunk == (AsciiId<'B','8','1'>::V) );
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if (baseChunk == AsciiId<'B','8','1'>::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<'R','E','G'>::V)
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{
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const uint data = state.Read8();
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trash = (data & 0x2) ? 0xFF : 0x00;
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cartSwitches.SetMode( data & 0x1 );
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}
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state.End();
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}
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}
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}
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void B8157::SubSave(State::Saver& state) const
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{
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state.Begin( AsciiId<'B','8','1'>::V ).Begin( AsciiId<'R','E','G'>::V ).Write8( (cartSwitches.GetMode() ? 0x1U : 0x0U) | (trash ? 0x2U : 0x0U) ).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_PEEK_A(B8157,8000)
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{
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return prg.Peek( address - 0x8000 ) | trash;
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}
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NES_POKE_A(B8157,8000)
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{
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trash = (address & cartSwitches.GetMode()) ? 0xFF : 0x00;
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prg.SwapBanks<SIZE_16K,0x0000>
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(
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(address >> 2 & 0x18) | (address >> 2 & 0x7),
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(address >> 2 & 0x18) | ((address & 0x200) ? 0x7 : 0x0)
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);
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ppu.SetMirroring( (address & 0x2) ? Ppu::NMT_H : Ppu::NMT_V );
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}
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}
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}
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}
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}
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