[fceu.git] / mappers / 226.c

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "mapinc.h"

#define rg mapbyte1
static void DoPRG(void)
{
  int32 b=((rg[0]>>1)&0xF) | ((rg[0]>>3)&0x10) | ((rg[1]&1)<<5);
  if(rg[0]&0x20)        // 16 KB
  {
   ROM_BANK16(0x8000,(b<<1)|(rg[0]&1));
   ROM_BANK16(0xC000,(b<<1)|(rg[0]&1));
  }
  else
   ROM_BANK32(b);
}

static DECLFW(Mapper226_write)
{
 rg[A&1]=V;
 DoPRG();
 if(A&1)
 {
  if(rg[1]&2)
   PPUCHRRAM=0;  // Write protected.
  else
   PPUCHRRAM=0xFF; // Not write protected.
 }
 else
  MIRROR_SET2((rg[0]>>6)&1);
}

static void M26Reset(void)
{
 rg[0]=rg[1]=0;
 DoPRG();
 PPUCHRRAM=0xFF;
 MIRROR_SET2(0);
}

static void M26Restore(int version)
{
 DoPRG();
 if(rg[1]&2)
  PPUCHRRAM=0;  // Write protected.
 else
  PPUCHRRAM=0xFF; // Not write protected.
 MIRROR_SET2((rg[0]>>6)&1);
}

void Mapper226_init(void)
{
  SetWriteHandler(0x8000,0xffff,Mapper226_write);
  MapperReset=M26Reset;
  GameStateRestore=M26Restore;
  M26Reset();
}

#ifdef OLD        // What the heck is this??
DECLFW(Mapper226_write)
{
 MIRROR_SET((A>>13)&1);
 VROM_BANK8(A&0x7F);
 if(A&0x1000)
  {
   if(A&0x40)
    {
     ROM_BANK16(0x8000,(((A>>7))<<1)+1);
     ROM_BANK16(0xC000,(((A>>7))<<1)+1);
    }
    else
    {
     ROM_BANK16(0x8000,(((A>>7))<<1));
     ROM_BANK16(0xC000,(((A>>7))<<1));
    }
  }
  else
  {
   ROM_BANK32(A>>7);
  }
}

void Mapper226_init(void)
{
  SetWriteHandler(0x8000,0xffff,Mapper226_write);
}
#endif
Commit	Line	Data
c62d2810	1	/* FCE Ultra - NES/Famicom Emulator
	2	*
	3	* Copyright notice for this file:
d97315ac	4	* Copyright (C) 2002 Xodnizel
c62d2810	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	#define rg mapbyte1
	24	static void DoPRG(void)
	25	{
	26	int32 b=((rg[0]>>1)&0xF) \| ((rg[0]>>3)&0x10) \| ((rg[1]&1)<<5);
	27	if(rg[0]&0x20) // 16 KB
	28	{
	29	ROM_BANK16(0x8000,(b<<1)\|(rg[0]&1));
	30	ROM_BANK16(0xC000,(b<<1)\|(rg[0]&1));
	31	}
	32	else
	33	ROM_BANK32(b);
	34	}
	35
	36	static DECLFW(Mapper226_write)
	37	{
	38	rg[A&1]=V;
	39	DoPRG();
	40	if(A&1)
	41	{
	42	if(rg[1]&2)
	43	PPUCHRRAM=0; // Write protected.
	44	else
	45	PPUCHRRAM=0xFF; // Not write protected.
	46	}
	47	else
	48	MIRROR_SET2((rg[0]>>6)&1);
	49	}
	50
	51	static void M26Reset(void)
	52	{
	53	rg[0]=rg[1]=0;
	54	DoPRG();
	55	PPUCHRRAM=0xFF;
	56	MIRROR_SET2(0);
	57	}
	58
	59	static void M26Restore(int version)
	60	{
	61	DoPRG();
	62	if(rg[1]&2)
	63	PPUCHRRAM=0; // Write protected.
	64	else
	65	PPUCHRRAM=0xFF; // Not write protected.
	66	MIRROR_SET2((rg[0]>>6)&1);
	67	}
	68
69	void Mapper226_init(void)
70	{
71	SetWriteHandler(0x8000,0xffff,Mapper226_write);
72	MapperReset=M26Reset;
73	GameStateRestore=M26Restore;
74	M26Reset();
75	}
76
d97315ac	77	#ifdef OLD // What the heck is this??
c62d2810	78	DECLFW(Mapper226_write)
	79	{
	80	MIRROR_SET((A>>13)&1);
	81	VROM_BANK8(A&0x7F);
	82	if(A&0x1000)
	83	{
	84	if(A&0x40)
	85	{
	86	ROM_BANK16(0x8000,(((A>>7))<<1)+1);
	87	ROM_BANK16(0xC000,(((A>>7))<<1)+1);
	88	}
	89	else
	90	{
	91	ROM_BANK16(0x8000,(((A>>7))<<1));
	92	ROM_BANK16(0xC000,(((A>>7))<<1));
	93	}
	94	}
	95	else
	96	{
	97	ROM_BANK32(A>>7);
	98	}
	99	}
	100
	101	void Mapper226_init(void)
	102	{
	103	SetWriteHandler(0x8000,0xffff,Mapper226_write);
	104	}
	105	#endif