mirror of
https://github.com/0ldsk00l/nestopia.git
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136 lines
3.2 KiB
C++
136 lines
3.2 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 "NstBoardMmc3.hpp"
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#include "NstBoardBmcHero.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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void Hero::SubReset(const bool hard)
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{
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if (hard)
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{
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for (uint i=0; i < 5; ++i)
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exRegs[i] = 0;
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}
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Mmc3::SubReset( hard );
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Map( 0x6000U, 0x7FFFU, &Hero::Poke_6000 );
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}
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void Hero::SubLoad(State::Loader& state,const dword baseChunk)
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{
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if (baseChunk == AsciiId<'B','H','R'>::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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State::Loader::Data<5> data( state );
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for (uint i=0; i < 5; ++i)
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exRegs[i] = data[i];
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}
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state.End();
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}
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}
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else
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{
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Mmc3::SubLoad( state, baseChunk );
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}
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}
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void Hero::SubSave(State::Saver& state) const
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{
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Mmc3::SubSave( state );
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const byte data[5] =
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{
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exRegs[0],
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exRegs[1],
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exRegs[2],
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exRegs[3],
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exRegs[4]
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};
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state.Begin( AsciiId<'B','H','R'>::V ).Begin( AsciiId<'R','E','G'>::V ).Write( data ).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_POKE_AD(Hero,6000)
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{
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if (exRegs[3] & 0x40)
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{
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NST_VERIFY( wrk.Writable(0) );
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if (wrk.Writable(0))
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wrk[0][address - 0x6000] = data;
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}
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else
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{
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exRegs[exRegs[4]] = data;
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exRegs[4] = (exRegs[4] + 1) & 0x3;
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Mmc3::UpdatePrg();
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Mmc3::UpdateChr();
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}
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}
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void NST_FASTCALL Hero::UpdatePrg(uint address,uint bank)
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{
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prg.SwapBank<SIZE_8K>( address, exRegs[1] | (bank & (exRegs[3] ^ 0x3F)) );
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}
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void NST_FASTCALL Hero::UpdateChr(uint address,uint bank) const
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{
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if (chr.Source().GetType() == Ram::ROM)
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{
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chr.SwapBank<SIZE_1K>
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(
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address,
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(exRegs[0] | (exRegs[2] << 4 & 0xF00)) |
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((exRegs[2] & 0x8) ? bank & ((1U << ((exRegs[2] & 0x7) + 1)) - 1) : exRegs[2] ? 0 : bank)
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);
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}
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}
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}
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}
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}
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}
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