/* 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "mapinc.h"

extern uint32 ROM_size;
static uint8 latche;

static void Sync(void) {
	if (latche) {
		if (latche & 0x10)
			setprg16(0x8000, (latche & 7));
		else
			setprg16(0x8000, (latche & 7) | 8);
	} else
		setprg16(0x8000, 7 + (ROM_size >> 4));
}

static DECLFW(M188Write) {
	latche = V;
	Sync();
}

static DECLFR(ExtDev) {
	return(3);
}

static void Power(void) {
	latche = 0;
	Sync();
	setchr8(0);
	setprg16(0xc000, 0x7);
	SetReadHandler(0x6000, 0x7FFF, ExtDev);
	SetReadHandler(0x8000, 0xFFFF, CartBR);
	SetWriteHandler(0x8000, 0xFFFF, M188Write);
}

static void StateRestore(int version) {
	Sync();
}

void Mapper188_Init(CartInfo *info) {
	info->Power = Power;
	GameStateRestore = StateRestore;
	AddExState(&latche, 1, 0, "LATC");
}