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////////////////////////////////////////////////////////////////////////////////////////
//
// 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<SIZE_16K,0x0000>
(
(address >> 2 & 0x18) | (address >> 2 & 0x7),
(address >> 2 & 0x18) | ((address & 0x200) ? 0x7 : 0x0)
);
ppu.SetMirroring( (address & 0x2) ? Ppu::NMT_H : Ppu::NMT_V );
}
}
}
}
}
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