fceugx/source/fceultra/boards/supervision.cpp

/* 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"

static uint8 cmd0, cmd1;

static void DoSuper(void) {
	setprg8r((cmd0 & 0xC) >> 2, 0x6000, ((cmd0 & 0x3) << 4) | 0xF);
	if (cmd0 & 0x10) {
		setprg16r((cmd0 & 0xC) >> 2, 0x8000, ((cmd0 & 0x3) << 3) | (cmd1 & 7));
		setprg16r((cmd0 & 0xC) >> 2, 0xc000, ((cmd0 & 0x3) << 3) | 7);
	} else
		setprg32r(4, 0x8000, 0);
	setmirror(((cmd0 & 0x20) >> 5) ^ 1);
}

static DECLFW(SuperWrite) {
	if (!(cmd0 & 0x10)) {
		cmd0 = V;
		DoSuper();
	}
}

static DECLFW(SuperHi) {
	cmd1 = V;
	DoSuper();
}

static void SuperReset(void) {
	SetWriteHandler(0x6000, 0x7FFF, SuperWrite);
	SetWriteHandler(0x8000, 0xFFFF, SuperHi);
	SetReadHandler(0x6000, 0xFFFF, CartBR);
	cmd0 = cmd1 = 0;
	setprg32r(4, 0x8000, 0);
	setchr8(0);
}

static void SuperRestore(int version) {
	DoSuper();
}

void Supervision16_Init(CartInfo *info) {
	AddExState(&cmd0, 1, 0, "L1");
	AddExState(&cmd1, 1, 0, "L2");
	info->Power = SuperReset;
	GameStateRestore = SuperRestore;
}