/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2006 CaH4e3
 *
 * 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
 *
 * Dragon Ball Z 2 - Gekishin Freeza! (C)
 * Dragon Ball Z Gaiden - Saiya Jin Zetsumetsu Keikaku (C)
 * San Guo Zhi 2 (C)
 *
 */

#include "mapinc.h"
#include "mmc3.h"

static uint8 *CHRRAM = NULL;
static uint32 CHRRAMSIZE;

static void M199PW(uint32 A, uint8 V) {
	setprg8(A, V);
	setprg8(0xC000, EXPREGS[0]);
	setprg8(0xE000, EXPREGS[1]);
}

static void M199CW(uint32 A, uint8 V) {
	setchr1r((V < 8) ? 0x10 : 0x00, A, V);
	setchr1r((DRegBuf[0] < 8) ? 0x10 : 0x00, 0x0000, DRegBuf[0]);
	setchr1r((EXPREGS[2] < 8) ? 0x10 : 0x00, 0x0400, EXPREGS[2]);
	setchr1r((DRegBuf[1] < 8) ? 0x10 : 0x00, 0x0800, DRegBuf[1]);
	setchr1r((EXPREGS[3] < 8) ? 0x10 : 0x00, 0x0c00, EXPREGS[3]);
}

static void M199MW(uint8 V) {
/*	FCEU_printf("%02x\n",V); */
	switch (V & 3) {
	case 0: setmirror(MI_V); break;
	case 1: setmirror(MI_H); break;
	case 2: setmirror(MI_0); break;
	case 3: setmirror(MI_1); break;
	}
}

static DECLFW(M199Write) {
	if ((A == 0x8001) && (MMC3_cmd & 8)) {
		EXPREGS[MMC3_cmd & 3] = V;
		FixMMC3PRG(MMC3_cmd);
		FixMMC3CHR(MMC3_cmd);
	} else
	if (A < 0xC000)
		MMC3_CMDWrite(A, V);
	else
		MMC3_IRQWrite(A, V);
}

static void M199Power(void) {
	EXPREGS[0] = ~1;
	EXPREGS[1] = ~0;
	EXPREGS[2] = 1;
	EXPREGS[3] = 3;
	GenMMC3Power();
	SetWriteHandler(0x8000, 0xFFFF, M199Write);
}

static void M199Close(void) {
	if (CHRRAM)
		FCEU_gfree(CHRRAM);
	CHRRAM = NULL;
}

void Mapper199_Init(CartInfo *info) {
	GenMMC3_Init(info, 512, 256, 8, info->battery);
	cwrap = M199CW;
	pwrap = M199PW;
	mwrap = M199MW;
	info->Power = M199Power;
	info->Close = M199Close;

	CHRRAMSIZE = 8192;
	CHRRAM = (uint8*)FCEU_gmalloc(CHRRAMSIZE);
	SetupCartCHRMapping(0x10, CHRRAM, CHRRAMSIZE, 1);
	AddExState(CHRRAM, CHRRAMSIZE, 0, "CHRR");

	AddExState(EXPREGS, 4, 0, "EXPR");
}
