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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
//
////////////////////////////////////////////////////////////////////////////////////////
#ifndef NST_BOARD_MMC1_H
#define NST_BOARD_MMC1_H
#ifdef NST_PRAGMA_ONCE
#pragma once
#endif
namespace Nes
{
namespace Core
{
namespace Boards
{
class NST_NO_VTABLE Mmc1 : public Board
{
public:
enum Revision
{
REV_A,
REV_B1,
REV_B2,
REV_B3
};
protected:
explicit Mmc1(const Context&,Revision=REV_B2);
void SubReset(bool);
void SubSave(State::Saver&) const;
void SubLoad(State::Loader&,dword);
void UpdatePrg();
void UpdateWrk();
void UpdateChr() const;
void UpdateNmt();
void Sync(Event,Input::Controllers*);
enum
{
CTRL,
CHR0,
CHR1,
PRG0
};
enum
{
CTRL_MIRRORING = 0x03,
CTRL_PRG_SWAP_LOW = 0x04,
CTRL_PRG_SWAP_16K = 0x08,
CTRL_CHR_SWAP_4K = 0x10,
CTRL_WRITE_RESET = CTRL_PRG_SWAP_LOW|CTRL_PRG_SWAP_16K,
CTRL_HARD_RESET = CTRL_WRITE_RESET|CTRL_MIRRORING,
PRG0_WRAM_DISABLED = 0x10
};
private:
void Save(File&) const;
void Load(File&);
void ResetRegisters();
virtual void NST_FASTCALL UpdateRegisters(uint);
NES_DECL_POKE( 8000 );
struct Serial
{
enum
{
RESET_BIT = 0x80,
RESET_CYCLES = 2
};
uint buffer;
uint shifter;
Cycle ready;
};
Serial serial;
protected:
byte regs[4];
const Revision revision;
};
}
}
}
#endif
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