75 lines
2.0 KiB
C
75 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) 2022 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 Mapper467_PRGWrap(uint32 A, uint8 V) {
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if (EXPREGS[0] &0x20) {
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int prgAND =EXPREGS[0] &0x40? 0x0F: 0x03;
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int prgOR =EXPREGS[0] <<1 &0x3C | 0x40;
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setprg8(A, V &prgAND | prgOR &~prgAND);
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} else
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if (~A &0x2000)
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setprg16(A, EXPREGS[0] &0x1F);
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}
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static void Mapper467_CHRWrap(uint32 A, uint8 V) {
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if (~A &0x0800) {
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A =A &~0x400 | A <<1 &0x800;
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if (EXPREGS[0] &0x40)
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setchr2(A, V |0x100);
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else
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setchr2(A, V &~3 | A >>11 &3);
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}
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}
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static DECLFW(Mapper467_WriteExtra) {
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EXPREGS[0] =V;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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setmirror(EXPREGS[0] &0x80? MI_H: MI_V);
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}
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static DECLFW(Mapper467_WriteMMC3) {
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if (~A &1) V &=0x3F;
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MMC3_CMDWrite(A, V);
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}
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static void Mapper467_Reset(void) {
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EXPREGS[0] =0;
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MMC3RegReset();
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}
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static void Mapper467_Power(void) {
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EXPREGS[0] =0;
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GenMMC3Power();
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SetWriteHandler(0x8000, 0x8FFF, Mapper467_WriteMMC3);
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SetWriteHandler(0x9000, 0x9FFF, Mapper467_WriteExtra);
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}
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void Mapper467_Init(CartInfo *info) {
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GenMMC3_Init(info, 256, 256, 0, 0);
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cwrap = Mapper467_CHRWrap;
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pwrap = Mapper467_PRGWrap;
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info->Power = Mapper467_Power;
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info->Reset = Mapper467_Reset;
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AddExState(EXPREGS, 1, 0, "EXPR");
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}
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