ci-libretro-fceumm/src/boards/525.c

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2025 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 "asic_vrc2and4.h"

static void sync () {
	VRC24_syncPRG(0x01F, 0x000);
	VRC24_syncCHR(0x1FF, 0x000);
	VRC24_syncMirror();
}

DECLFW(UNLKS7021A_writeCHR) {
	VRC24_writeReg(0xB000 +(A <<11 &0x3000 | A <<1 &0x0002), V &0x0F);
	VRC24_writeReg(0xB001 +(A <<11 &0x3000 | A <<1 &0x0002), V >>4);
}

void UNLKS7021A_power (void) {
	VRC24_power();
	SetWriteHandler(0xB000, 0xEFFF, UNLKS7021A_writeCHR);
}

void UNLKS7021A_Init (CartInfo *info) {
	VRC2_init(info, sync, 0x01, 0x02, NULL, NULL, NULL, NULL);
	info->Power =UNLKS7021A_power;
}