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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 "NstBoardBmcSuper22Games.hpp"
#include "../NstCrc32.hpp"
namespace Nes
{
namespace Core
{
namespace Boards
{
namespace Bmc
{
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("s", on)
#endif
class Super22Games::CartSwitches : public DipSwitches
{
enum Type
{
SUPER_X_GAMES = 0,
SUPER_22_GAMES = 0xB27414ED
};
uint hiPrg;
const Type type;
explicit CartSwitches(Type t)
: hiPrg(0x00), type(t) {}
public:
static CartSwitches* Create(const Context& c)
{
if (c.prg.Size() == SIZE_1024K)
return new CartSwitches( Crc32::Compute(c.prg.Mem(),c.prg.Size()) == SUPER_22_GAMES ? SUPER_22_GAMES : SUPER_X_GAMES );
else
return NULL;
}
void EnableHiPrg(bool enable)
{
hiPrg = enable ? 0x20 : 0x00;
}
uint GetHiPrg() const
{
return hiPrg;
}
private:
uint GetValue(uint) const
{
return hiPrg ? 1 : 0;
}
void SetValue(uint,uint value)
{
hiPrg = value ? 0x20 : 0x00;
}
uint NumDips() const
{
return 1;
}
uint NumValues(uint) const
{
return 2;
}
cstring GetDipName(uint) const
{
return "Mode";
}
cstring GetValueName(uint,uint i) const
{
return i ? (type == SUPER_22_GAMES ? "20-in-1" : "2") :
(type == SUPER_22_GAMES ? "22-in-1" : "1");
}
};
Super22Games::Super22Games(const Context& c)
: Board(c), cartSwitches(CartSwitches::Create(c)) {}
Super22Games::~Super22Games()
{
delete cartSwitches;
}
Super22Games::Device Super22Games::QueryDevice(DeviceType type)
{
if (type == DEVICE_DIP_SWITCHES)
return cartSwitches;
else
return Board::QueryDevice( type );
}
void Super22Games::SubReset(bool)
{
Map( 0x8000U, 0xFFFFU, &Super22Games::Poke_8000 );
NES_DO_POKE(8000,0x8000,0x00);
}
void Super22Games::SubLoad(State::Loader& state,const dword baseChunk)
{
NST_VERIFY( baseChunk == (AsciiId<'B','2','2'>::V) );
if (baseChunk == AsciiId<'B','2','2'>::V)
{
while (const dword chunk = state.Begin())
{
if (chunk == AsciiId<'R','E','G'>::V)
{
NST_VERIFY( cartSwitches );
if (cartSwitches)
cartSwitches->EnableHiPrg( state.Read8() & 0x1 );
}
state.End();
}
}
}
void Super22Games::SubSave(State::Saver& state) const
{
if (cartSwitches)
state.Begin( AsciiId<'B','2','2'>::V ).Begin( AsciiId<'R','E','G'>::V ).Write8( cartSwitches->GetHiPrg() ? 0x1 : 0x0 ).End().End();
}
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("", on)
#endif
NES_POKE_D(Super22Games,8000)
{
const uint hiPrg = cartSwitches ? cartSwitches->GetHiPrg() : 0x00;
if (data & 0x20)
prg.SwapBanks<SIZE_16K,0x0000>( hiPrg | (data & 0x1F), hiPrg | (data & 0x1F) );
else
prg.SwapBank<SIZE_32K,0x0000>( (hiPrg >> 1) | (data >> 1 & 0xF) );
static const byte lut[4][4] =
{
{0,0,0,0},
{0,1,0,1},
{0,0,1,1},
{1,1,1,1}
};
ppu.SetMirroring( lut[data >> 6] );
}
}
}
}
}
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