[fceu.git] / mappers / 204.c

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2003 CaH4e3
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "mapinc.h"

static DECLFW(Mapper204_write)
{
 int tmp2=A&0x6;
 int tmp1=tmp2+((tmp2==0x6)?0:(A&1));
 MIRROR_SET((A>>4)&1);
 ROM_BANK16(0x8000,tmp1);
 ROM_BANK16(0xc000,tmp2+((tmp2==0x6)?1:(A&1)));
 VROM_BANK8(tmp1);
}

void Mapper204_init(void)
{
 ROM_BANK32(~0);
 VROM_BANK8(~0);
 SetWriteHandler(0x8000,0xFFFF,Mapper204_write);
}
Commit	Line	Data
e2d0dd92	1	/* FCE Ultra - NES/Famicom Emulator
	2	*
	3	* Copyright notice for this file:
	4	* Copyright (C) 2003 CaH4e3
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20
	21	#include "mapinc.h"
	22
	23	static DECLFW(Mapper204_write)
	24	{
	25	int tmp2=A&0x6;
	26	int tmp1=tmp2+((tmp2==0x6)?0:(A&1));
	27	MIRROR_SET((A>>4)&1);
	28	ROM_BANK16(0x8000,tmp1);
	29	ROM_BANK16(0xc000,tmp2+((tmp2==0x6)?1:(A&1)));
	30	VROM_BANK8(tmp1);
	31	}
	32
	33	void Mapper204_init(void)
	34	{
	35	ROM_BANK32(~0);
	36	VROM_BANK8(~0);
	37	SetWriteHandler(0x8000,0xFFFF,Mapper204_write);
	38	}