
#pragma once

// Optional less-common simple mappers

// Nes_Emu 0.7.0. http://www.slack.net/~ant/

#include "mappers/mapper.h"

/* Copyright (C) 2004-2006 Shay Green. This module is free software; you
can redistribute it and/or modify it under the terms of the GNU Lesser
General Public License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version. This
module 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 Lesser General Public License for
more details. You should have received a copy of the GNU Lesser General
Public License along with this module; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */

// Quattro

class Mapper232 : public Nes_Mapper {
	uint8_t regs [2];
public:
	Mapper232()
	{
		register_state( regs, sizeof regs );
	}
	
	virtual void reset_state()
	{
		regs [0] = 0;
		regs [1] = 3;
	}
	
	virtual void apply_mapping()
	{
		int bank = regs [0] >> 1 & 0x0c;
		set_prg_bank( 0x8000, bank_16k, bank + (regs [1] & 3) );
		set_prg_bank( 0xC000, bank_16k, bank + 3 );
	}
	
	virtual void write( nes_time_t, nes_addr_t addr, int data )
	{
		if ( addr < 0xc000 )
			regs [0] = data;
		else
			regs [1] = data;
		Mapper232::apply_mapping();
	}
};

