63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/* FCEUmm - 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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#include "mmc3.h"
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static void Mapper473_PRGWrap(uint32 A, uint8 V) {
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int prgAND =EXPREGS[0] &0x20? (0xFF >> (7 -(EXPREGS[0] &7))): 0x00;
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int prgOR =EXPREGS[0] &0x20? (EXPREGS[1] | EXPREGS[2] <<8): 0x3F;
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setprg8(A, V &prgAND | prgOR &~prgAND);
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SetWriteHandler(0x8000, 0xBFFF, EXPREGS[0] &0x40? CartBW: MMC3_CMDWrite);
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SetWriteHandler(0xC000, 0xFFFF, EXPREGS[0] &0x40? CartBW: MMC3_IRQWrite);
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}
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static void Mapper473_CHRWrap(uint32 A, uint8 V) {
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if (~EXPREGS[0] &0x80)
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setchr8(EXPREGS[3]);
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else
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setchr1(A, V);
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}
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static DECLFW(Mapper473_WriteReg) {
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EXPREGS[A &3] =V;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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static void Mapper473_Reset(void) {
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EXPREGS[0] =EXPREGS[1] =EXPREGS[2] =EXPREGS[3] =0;
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MMC3RegReset();
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}
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static void Mapper473_Power(void) {
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EXPREGS[0] =EXPREGS[1] =EXPREGS[2] =EXPREGS[3] =0;
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GenMMC3Power();
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SetWriteHandler(0x4800, 0x4FFF, Mapper473_WriteReg);
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}
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void Mapper473_Init(CartInfo *info) {
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GenMMC3_Init(info, 512, 256, (info->PRGRamSize +info->PRGRamSaveSize) >>10, info->battery);
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cwrap = Mapper473_CHRWrap;
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pwrap = Mapper473_PRGWrap;
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info->Power = Mapper473_Power;
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info->Reset = Mapper473_Reset;
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AddExState(EXPREGS, 4, 0, "EXPR");
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}
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