103 lines
2.6 KiB
C
103 lines
2.6 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) 2023
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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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/* NES 2.0 Mapper 556
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* Used for the for the 餓狼傳說 激鬥篇 HiK 7-in-1 (JY-215) multicart.
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*/
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#include "mapinc.h"
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#include "asic_mmc3.h"
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#include "asic_vrc2and4.h"
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#include "wram.h"
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static uint8 reg[4];
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static uint8 index;
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static SFORMAT StateRegs[] = {
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{ reg, 5, "REGS" },
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{ &index, 1, "INDX" },
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{ 0 },
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};
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static void sync (void) {
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int prgAND = ~reg[3] &0x3F;
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int chrAND = 0xFF >>(~reg[2] &0xF);
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int prgOR = (reg[1] | reg[3] <<2 &0x100) &~prgAND;
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int chrOR = (reg[0] | reg[2] <<4 &0x0F00 | reg[3] <<6 &0x1000) &~chrAND;
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if (reg[2] &0x80) {
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VRC24_syncWRAM(0);
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VRC24_syncPRG(prgAND, prgOR);
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VRC24_syncCHR(chrAND, chrOR);
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VRC24_syncMirror();
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} else {
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MMC3_syncWRAM(0);
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MMC3_syncPRG(prgAND, prgOR);
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MMC3_syncCHR(chrAND, chrOR);
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MMC3_syncMirror();
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}
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}
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static void applyMode (uint8 clear) {
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if (reg[2] &0x80)
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VRC4_activate(clear, sync, 0x05, 0x0A, 1, NULL, NULL, NULL, NULL, NULL);
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else
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MMC3_activate(clear, sync, MMC3_TYPE_AX5202P, NULL, NULL, NULL, NULL);
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}
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static DECLFW(writeReg) {
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if (~reg[3] &0x80) {
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reg[index++ &3] = V;
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if (index == 3)
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applyMode(1);
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else
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sync();
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}
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}
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static void reset (void) {
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reg[0] = reg[1] = reg[3] = 0;
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reg[2] = 0x0F;
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index = 0;
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applyMode(1);
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}
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static void power (void) {
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reg[0] = reg[1] = reg[3] = 0;
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reg[2] = 0x0F;
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index = 0;
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SetReadHandler(0x6000, 0xFFFF, CartBR);
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SetWriteHandler(0x5000, 0x5FFF, writeReg);
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applyMode(1);
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}
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static void restore (int version) {
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applyMode(0);
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}
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void Mapper556_Init (CartInfo *info) {
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MMC3_addExState();
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VRC24_addExState();
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WRAM_init(info, 8);
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info->Reset = reset;
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info->Power = power;
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GameStateRestore = restore;
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AddExState(StateRegs, ~0, 0, 0);
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}
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