[fceu.git] / mappers / simple.c

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 1998 BERO
 *  Copyright (C) 2002 Xodnizel
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "mapinc.h"

static uint8 latche;

static DECLFW(Mapper34_write)
{
 switch(A)
 {
  case 0x7FFD:ROM_BANK32(V);break;
  case 0x7FFE:VROM_BANK4(0x0000,V);break;
  case 0x7fff:VROM_BANK4(0x1000,V);break;
 }
 if(A>=0x8000)
  ROM_BANK32(V);
}

void Mapper34_init(void)
{
 ROM_BANK32(0);
  SetWriteHandler(0x7ffd,0xffff,Mapper34_write);
}

/* I might want to add some code to the mapper 96 PPU hook function
   to not change CHR banks if the attribute table is being accessed,
   if I make emulation a little more accurate in the future.
*/

static uint8 M96LA;
static DECLFW(Mapper96_write)
{
 latche=V;
 setprg32(0x8000,V&3);
 setchr4r(0x10,0x0000,(latche&4)|M96LA);
 setchr4r(0x10,0x1000,(latche&4)|3);
}

static void M96Hook(uint32 A)
{
 if((A&0x3000)!=0x2000) return;
 //if((A&0x3ff)>=0x3c0) return;
 M96LA=(A>>8)&3;
 setchr4r(0x10,0x0000,(latche&4)|M96LA);
}

static void M96Sync(int v)
{
 setprg32(0x8000,latche&3);
 setchr4r(0x10,0x0000,(latche&4)|M96LA);
 setchr4r(0x10,0x1000,(latche&4)|3);
}

void Mapper96_init(void)
{
 SetWriteHandler(0x8000,0xffff,Mapper96_write);
 PPU_hook=M96Hook;
 AddExState(&latche, 1, 0, "LATC");
 AddExState(&M96LA, 1, 0, "LAVA");
 SetupCartCHRMapping(0x10, MapperExRAM, 32768, 1);
 latche=M96LA=0;
 M96Sync(0);
 setmirror(MI_0);
 GameStateRestore=M96Sync;
}

// DIS23C01 Open Soft, Korea
// Metal Force (K)
// Buzz and Waldog (K)
Commit	Line	Data
	1	/* FCE Ultra - NES/Famicom Emulator
	2	*
	3	* Copyright notice for this file:
	4	* Copyright (C) 1998 BERO
	5	* Copyright (C) 2002 Xodnizel
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21
	22	#include "mapinc.h"
	23
	24	static uint8 latche;
	25
	26	static DECLFW(Mapper34_write)
	27	{
	28	switch(A)
	29	{
	30	case 0x7FFD:ROM_BANK32(V);break;
	31	case 0x7FFE:VROM_BANK4(0x0000,V);break;
	32	case 0x7fff:VROM_BANK4(0x1000,V);break;
	33	}
	34	if(A>=0x8000)
	35	ROM_BANK32(V);
	36	}
	37
	38	void Mapper34_init(void)
	39	{
	40	ROM_BANK32(0);
	41	SetWriteHandler(0x7ffd,0xffff,Mapper34_write);
	42	}
	43
	44	/* I might want to add some code to the mapper 96 PPU hook function
	45	to not change CHR banks if the attribute table is being accessed,
	46	if I make emulation a little more accurate in the future.
	47	*/
	48
	49	static uint8 M96LA;
	50	static DECLFW(Mapper96_write)
	51	{
	52	latche=V;
	53	setprg32(0x8000,V&3);
	54	setchr4r(0x10,0x0000,(latche&4)\|M96LA);
	55	setchr4r(0x10,0x1000,(latche&4)\|3);
	56	}
	57
	58	static void M96Hook(uint32 A)
	59	{
	60	if((A&0x3000)!=0x2000) return;
	61	//if((A&0x3ff)>=0x3c0) return;
	62	M96LA=(A>>8)&3;
	63	setchr4r(0x10,0x0000,(latche&4)\|M96LA);
	64	}
	65
	66	static void M96Sync(int v)
	67	{
	68	setprg32(0x8000,latche&3);
	69	setchr4r(0x10,0x0000,(latche&4)\|M96LA);
	70	setchr4r(0x10,0x1000,(latche&4)\|3);
	71	}
	72
	73	void Mapper96_init(void)
	74	{
	75	SetWriteHandler(0x8000,0xffff,Mapper96_write);
	76	PPU_hook=M96Hook;
	77	AddExState(&latche, 1, 0, "LATC");
	78	AddExState(&M96LA, 1, 0, "LAVA");
	79	SetupCartCHRMapping(0x10, MapperExRAM, 32768, 1);
	80	latche=M96LA=0;
	81	M96Sync(0);
	82	setmirror(MI_0);
	83	GameStateRestore=M96Sync;
	84	}
	85
	86	// DIS23C01 Open Soft, Korea
	87	// Metal Force (K)
	88	// Buzz and Waldog (K)