/* FCEUmm - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2022 NewRisingSun
 *
 * 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"
#include "mmc3.h"

static void Mapper467_PRGWrap(uint32 A, uint8 V) {
	if (EXPREGS[0] &0x20) {
		int prgAND =EXPREGS[0] &0x40? 0x0F: 0x03;
		int prgOR  =EXPREGS[0] <<1 &0x3C | 0x40;
		setprg8(A, V &prgAND | prgOR &~prgAND);
	} else
	if (~A &0x2000)
		setprg16(A, EXPREGS[0] &0x1F);
}

static void Mapper467_CHRWrap(uint32 A, uint8 V) {
	if (~A &0x0800) {
		A =A &~0x400 | A <<1 &0x800;
		if (EXPREGS[0] &0x40)
			setchr2(A, V |0x100);
		else
			setchr2(A, V &~3 | A >>11 &3);
	}
}

static DECLFW(Mapper467_WriteExtra) {
	EXPREGS[0] =V;
	FixMMC3PRG(MMC3_cmd);
	FixMMC3CHR(MMC3_cmd);
	setmirror(EXPREGS[0] &0x80? MI_H: MI_V);
}

static DECLFW(Mapper467_WriteMMC3) {
	if (~A &1) V &=0x3F;
	MMC3_CMDWrite(A, V);
}

static void Mapper467_Reset(void) {
	EXPREGS[0] =0;
	MMC3RegReset();
}

static void Mapper467_Power(void) {
	EXPREGS[0] =0;
	GenMMC3Power();
	SetWriteHandler(0x8000, 0x8FFF, Mapper467_WriteMMC3);
	SetWriteHandler(0x9000, 0x9FFF, Mapper467_WriteExtra);
}

void Mapper467_Init(CartInfo *info) {
	GenMMC3_Init(info, 256, 256, 0, 0);
	cwrap = Mapper467_CHRWrap;
	pwrap = Mapper467_PRGWrap;
	info->Power = Mapper467_Power;
	info->Reset = Mapper467_Reset;
	AddExState(EXPREGS, 1, 0, "EXPR");
}