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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 "NstBoardBenshengBs5.hpp"
#include "../NstCrc32.hpp"
#include "../NstDipSwitches.hpp"
namespace Nes
{
namespace Core
{
namespace Boards
{
namespace Bensheng
{
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("s", on)
#endif
class Bs5::CartSwitches : public DipSwitches
{
enum Type
{
CRC_4_IN_1_A = 0x01E54556,
CRC_4_IN_1_B = 0x6DCE148C,
CRC_4_IN_1_C = 0x13E55C4C
};
uint mode;
const Type type;
explicit CartSwitches(Type t)
: mode(0), type(t) {}
public:
static CartSwitches* Create(const Context& c)
{
switch (const dword crc = Crc32::Compute(c.prg.Mem(),c.prg.Size()))
{
case CRC_4_IN_1_A:
case CRC_4_IN_1_B:
case CRC_4_IN_1_C:
return new CartSwitches( static_cast<Type>(crc) );
}
return NULL;
}
void SetMode(uint value)
{
mode = value & 0x3;
}
uint GetMode() const
{
return mode;
}
private:
uint GetValue(uint) const
{
return mode;
}
void SetValue(uint,uint value)
{
mode = value;
}
uint NumValues(uint) const
{
return 4;
}
uint NumDips() const
{
return 1;
}
cstring GetDipName(uint) const
{
return "Mode";
}
cstring GetValueName(uint,uint i) const
{
switch (type)
{
case CRC_4_IN_1_A:
{
static const char names[4][9] =
{
"4-in-1",
"23-in-1",
"53-in-1",
"163-in-1"
};
return names[i];
}
case CRC_4_IN_1_B:
{
static const char names[4][9] =
{
"4-in-1",
"32-in-1",
"64-in-1",
"128-in-1"
};
return names[i];
}
case CRC_4_IN_1_C:
{
static const char names[4][9] =
{
"4-in-1",
"21-in-1",
"81-in-1",
"151-in-1"
};
return names[i];
}
}
return NULL;
}
};
Bs5::Bs5(const Context& c)
: Board(c), cartSwitches(CartSwitches::Create(c)) {}
Bs5::~Bs5()
{
delete cartSwitches;
}
void Bs5::SubReset(const bool hard)
{
if (hard)
prg.SwapBanks<SIZE_8K,0x0000>( ~0U, ~0U, ~0U, ~0U );
Map( 0x8000U, 0x8FFFU, &Bs5::Poke_8000 );
Map( 0xA000U, 0xAFFFU, &Bs5::Poke_A000 );
}
Bs5::Device Bs5::QueryDevice(DeviceType type)
{
if (type == DEVICE_DIP_SWITCHES)
return cartSwitches;
else
return Board::QueryDevice( type );
}
void Bs5::SubLoad(State::Loader& state,const dword baseChunk)
{
NST_VERIFY( (baseChunk == AsciiId<'B','S','5'>::V) );
if (baseChunk == AsciiId<'B','S','5'>::V)
{
while (const dword chunk = state.Begin())
{
if (chunk == AsciiId<'D','I','P'>::V)
{
NST_VERIFY( cartSwitches );
if (cartSwitches)
cartSwitches->SetMode( state.Read8() );
}
state.End();
}
}
}
void Bs5::SubSave(State::Saver& state) const
{
if (cartSwitches)
state.Begin( AsciiId<'B','S','5'>::V ).Begin( AsciiId<'D','I','P'>::V ).Write8( cartSwitches->GetMode() ).End().End();
}
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("", on)
#endif
NES_POKE_A(Bs5,8000)
{
ppu.Update();
chr.SwapBank<SIZE_2K>( address << 1 & 0x1800, address & 0x1F );
}
NES_POKE_A(Bs5,A000)
{
if (address & (0x10U << (cartSwitches ? cartSwitches->GetMode() : 0)))
prg.SwapBank<SIZE_8K>( address << 3 & 0x6000, address & 0xF );
}
}
}
}
}
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