72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2025 NewRisingSun
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "mapinc.h"
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static uint8 submapper;
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static uint8 reg[2];
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static void sync () {
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setprg16(0x8000, reg[0] <<3 | reg[1] &0x07);
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setprg16(0xC000, reg[0] <<3 | 0x07);
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setchr8(0);
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switch(submapper) {
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case 1: /* J.Y. YY850437C */
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setmirror(reg[0] &0x40? MI_H: MI_V);
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break;
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case 2: /* Realtec GN-51 */
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case 3: /* Realtec 8030 */
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setmirror(reg[0] &0x20? MI_H: MI_V);
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break;
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default:
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setmirror(reg[0] &0x60? MI_H: MI_V);
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break;
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}
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}
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static DECLFW (writeReg) {
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reg[(A &0xE000) == 0xA000? 0: 1] = V;
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sync();
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}
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static DECLFW (writeReg_submapper3) {
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reg[A >>14 &1] = V;
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sync();
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}
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static void power () {
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SetReadHandler(0x6000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, submapper == 3? writeReg_submapper3: writeReg);
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reg[0] = reg[1] = 0;
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sync();
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}
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static void stateRestore (int version) {
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sync();
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}
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void Mapper396_Init (CartInfo *info) {
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submapper = info->submapper;
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info->Power = power;
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info->Reset = submapper == 3? sync: power;
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GameStateRestore = stateRestore;
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AddExState(reg, 2, 0, "REGS");
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}
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