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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 "NstBoardMmc3.hpp"
#include "NstBoardBmcGoldenCard6in1.hpp"
namespace Nes
{
namespace Core
{
namespace Boards
{
namespace Bmc
{
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("s", on)
#endif
void GoldenCard6in1::SubReset(const bool hard)
{
if (hard)
{
exRegs[0] = 0x00;
exRegs[1] = 0xFF;
exRegs[2] = 0x03;
}
exRegs[3] = false;
Mmc3::SubReset( hard );
Map( 0x5000U, &GoldenCard6in1::Poke_5000 );
Map( 0x5001U, &GoldenCard6in1::Poke_5001 );
Map( 0x5007U, &GoldenCard6in1::Poke_5007 );
for (uint i=0x0000; i < 0x2000; i += 0x2)
{
Map( 0x8000 + i, &GoldenCard6in1::Poke_8000 );
Map( 0x8001 + i, &GoldenCard6in1::Poke_8001 );
Map( 0xA000 + i, &GoldenCard6in1::Poke_A000 );
Map( 0xA001 + i, &GoldenCard6in1::Poke_A001 );
}
}
void GoldenCard6in1::SubLoad(State::Loader& state,const dword baseChunk)
{
if (baseChunk == AsciiId<'B','G','C'>::V)
{
while (const dword chunk = state.Begin())
{
if (chunk == AsciiId<'R','E','G'>::V)
{
state.Read( exRegs );
exRegs[3] &= 0x1U;
}
state.End();
}
}
else
{
Mmc3::SubLoad( state, baseChunk );
}
}
void GoldenCard6in1::SubSave(State::Saver& state) const
{
Mmc3::SubSave( state );
state.Begin( AsciiId<'B','G','C'>::V ).Begin( AsciiId<'R','E','G'>::V ).Write( exRegs ).End().End();
}
#ifdef NST_MSVC_OPTIMIZE
#pragma optimize("", on)
#endif
void NST_FASTCALL GoldenCard6in1::UpdatePrg(uint address,uint bank)
{
if (exRegs[1] & 0x8U)
bank = (bank & 0x1F);
else
bank = (bank & 0x0F) | (exRegs[1] & 0x10U);
prg.SwapBank<SIZE_8K>( address, (exRegs[1] << 5 & 0x60U) | bank );
}
void NST_FASTCALL GoldenCard6in1::UpdateChr(uint address,uint bank) const
{
if (!(exRegs[1] & 0x8U))
bank = (exRegs[1] << 3 & 0x80U) | (bank & 0x7F);
chr.SwapBank<SIZE_1K>( address, (exRegs[1] << 8 & 0x300U) | bank );
}
NES_POKE_D(GoldenCard6in1,5000)
{
exRegs[0] = data;
if (data & 0x80)
{
data = (data & 0x0F) | (exRegs[1] << 4 & 0x30U);
prg.SwapBanks<SIZE_16K,0x0000>( data, data );
}
else
{
Mmc3::UpdatePrg();
}
}
NES_POKE_D(GoldenCard6in1,5001)
{
if (exRegs[1] != data)
{
exRegs[1] = data;
Mmc3::UpdatePrg();
}
}
NES_POKE_D(GoldenCard6in1,5007)
{
exRegs[2] = data;
}
NES_POKE_D(GoldenCard6in1,8000)
{
if (exRegs[2])
Mmc3::NES_DO_POKE(C000,0xC000,data);
else
Mmc3::NES_DO_POKE(8000,0x8000,data);
}
NES_POKE_D(GoldenCard6in1,8001)
{
if (exRegs[2])
{
static const byte lut[8] = {0,6,3,7,5,2,4,1};
data = (data & 0xC0) | lut[data & 0x07];
exRegs[3] = true;
Mmc3::NES_DO_POKE(8000,0x8000,data);
}
else
{
Mmc3::NES_DO_POKE(8001,0x8001,data);
}
}
NES_POKE_D(GoldenCard6in1,A000)
{
if (exRegs[2])
{
if (exRegs[3] && ((exRegs[0] & 0x80U) == 0 || (regs.ctrl0 & 0x7) < 6))
{
exRegs[3] = false;
Mmc3::NES_DO_POKE(8001,0x8001,data);
}
}
else
{
SetMirroringHV( data );
}
}
NES_POKE_D(GoldenCard6in1,A001)
{
if (exRegs[2])
SetMirroringHV( data );
else
Mmc3::NES_DO_POKE(A001,0xA001,data);
}
}
}
}
}
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