[fceu.git] / mappers / 92.c

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2002 Ben Parnell
 *
 * 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"

/* Original code provided by LULU */

static DECLFW(Mapper92_write)
{
 uint8 reg=(A&0xF0)>>4;
 uint8 bank=A&0xF;

 if(A>=0x9000)
 {
  if(reg==0xD) { ROM_BANK16(0xc000,bank); X6502_Rebase(); }
  else if(reg==0xE) VROM_BANK8(bank);
 }
 else
 {
  if(reg==0xB) { ROM_BANK16(0xc000,bank); X6502_Rebase(); }
  else if(reg==0x7) VROM_BANK8(bank);
 }
}

void Mapper92_init(void)
{
 SetWriteHandler(0x8000,0xFFFF,Mapper92_write);
}
Commit	Line	Data
c62d2810	1	/* FCE Ultra - NES/Famicom Emulator
	2	*
	3	* Copyright notice for this file:
	4	* Copyright (C) 2002 Ben Parnell
	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	/* Original code provided by LULU */
	24
	25	static DECLFW(Mapper92_write)
	26	{
	27	uint8 reg=(A&0xF0)>>4;
	28	uint8 bank=A&0xF;
	29
	30	if(A>=0x9000)
	31	{
c0bf6f9f	32	if(reg==0xD) { ROM_BANK16(0xc000,bank); X6502_Rebase(); }
c62d2810	33	else if(reg==0xE) VROM_BANK8(bank);
	34	}
	35	else
	36	{
c0bf6f9f	37	if(reg==0xB) { ROM_BANK16(0xc000,bank); X6502_Rebase(); }
c62d2810	38	else if(reg==0x7) VROM_BANK8(bank);
	39	}
	40	}
	41
	42	void Mapper92_init(void)
	43	{
	44	SetWriteHandler(0x8000,0xFFFF,Mapper92_write);
	45	}