[fceu.git] / mappers / 17.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"


static void FP_FASTAPASS(1) FFEIRQHook(int a)
{
  if(IRQa)
  {
   IRQCount+=a;

   if(IRQCount>=0x10000)
   {
    TriggerIRQ();
    IRQa=0;
    IRQCount=0;
   }
  }
}


DECLFW(Mapper17_write)
{
        switch(A){
        default:
	           break;
        case 0x42FE:
                   onemir((V>>4)&1);
                   break;
        case 0x42FF:
                   MIRROR_SET((V>>4)&1);
        	   break;
        case 0x4501:IRQa=V&1;break;
        case 0x4502:IRQCount&=0xFF00;IRQCount|=V;break;
        case 0x4503:IRQCount&=0x00FF;IRQCount|=V<<8;IRQa=1;break;
        case 0x4504: ROM_BANK8(0x8000,V);
                     X6502_Rebase();break;
        case 0x4505: ROM_BANK8(0xA000,V);
                     X6502_Rebase();break;
        case 0x4506: ROM_BANK8(0xC000,V);
                     X6502_Rebase();break;
        case 0x4507: ROM_BANK8(0xE000,V);
                     X6502_Rebase();break;
        case 0x4510: VROM_BANK1(0x0000,V);break;
        case 0x4511: VROM_BANK1(0x0400,V);break;
        case 0x4512: VROM_BANK1(0x0800,V);break;
        case 0x4513: VROM_BANK1(0x0C00,V);break;
        case 0x4514: VROM_BANK1(0x1000,V);break;
        case 0x4515: VROM_BANK1(0x1400,V);break;
        case 0x4516: VROM_BANK1(0x1800,V);break;
        case 0x4517: VROM_BANK1(0x1C00,V);break;
        }
}

void Mapper17_init(void)
{
MapIRQHook=FFEIRQHook;
SetWriteHandler(0x4020,0x5fff,Mapper17_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
	24
	25	static void FP_FASTAPASS(1) FFEIRQHook(int a)
	26	{
	27	if(IRQa)
	28	{
	29	IRQCount+=a;
	30
	31	if(IRQCount>=0x10000)
	32	{
	33	TriggerIRQ();
	34	IRQa=0;
	35	IRQCount=0;
	36	}
	37	}
	38	}
	39
	40
	41	DECLFW(Mapper17_write)
	42	{
	43	switch(A){
	44	default:
	45	break;
	46	case 0x42FE:
	47	onemir((V>>4)&1);
	48	break;
	49	case 0x42FF:
	50	MIRROR_SET((V>>4)&1);
	51	break;
	52	case 0x4501:IRQa=V&1;break;
	53	case 0x4502:IRQCount&=0xFF00;IRQCount\|=V;break;
	54	case 0x4503:IRQCount&=0x00FF;IRQCount\|=V<<8;IRQa=1;break;
c0bf6f9f	55	case 0x4504: ROM_BANK8(0x8000,V);
	56	X6502_Rebase();break;
	57	case 0x4505: ROM_BANK8(0xA000,V);
	58	X6502_Rebase();break;
	59	case 0x4506: ROM_BANK8(0xC000,V);
	60	X6502_Rebase();break;
	61	case 0x4507: ROM_BANK8(0xE000,V);
	62	X6502_Rebase();break;
c62d2810	63	case 0x4510: VROM_BANK1(0x0000,V);break;
	64	case 0x4511: VROM_BANK1(0x0400,V);break;
	65	case 0x4512: VROM_BANK1(0x0800,V);break;
	66	case 0x4513: VROM_BANK1(0x0C00,V);break;
	67	case 0x4514: VROM_BANK1(0x1000,V);break;
	68	case 0x4515: VROM_BANK1(0x1400,V);break;
	69	case 0x4516: VROM_BANK1(0x1800,V);break;
	70	case 0x4517: VROM_BANK1(0x1C00,V);break;
	71	}
	72	}
	73
	74	void Mapper17_init(void)
	75	{
	76	MapIRQHook=FFEIRQHook;
	77	SetWriteHandler(0x4020,0x5fff,Mapper17_write);
	78	}