66 lines
1.9 KiB
C
66 lines
1.9 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) 2019 Libretro Team
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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 Mapper376CW(uint32 A, uint8 V) {
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uint32 base = (EXPREGS[0] &0x40? 0x080: 0x000) | (EXPREGS[1] &0x01? 0x100: 0x000);
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setchr1(A, base | (V & 0x7F));
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}
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static void Mapper376PW(uint32 A, uint8 V) {
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uint32 base = (EXPREGS[0] &0x07) | (EXPREGS[0] &0x40? 0x08: 0x00) | (EXPREGS[1] &0x01? 0x10: 0x00);
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if (EXPREGS[0] & 0x80) {
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if (EXPREGS[0] &0x20) {
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if (A ==0x8000) setprg32(A, base >>1);
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} else {
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if (A ==0x8000 || A ==0xC000) setprg16(A, base);
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}
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} else
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setprg8(A, (base << 1) | (V & 0x0F));
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}
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static DECLFW(Mapper376Write) {
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EXPREGS[A & 1] = 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 Mapper376Reset(void) {
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EXPREGS[0] = 0;
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EXPREGS[1] = 0;
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MMC3RegReset();
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}
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static void Mapper376Power(void) {
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GenMMC3Power();
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SetWriteHandler(0x6000, 0x7FFF, Mapper376Write);
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}
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void Mapper376_Init(CartInfo *info) {
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GenMMC3_Init(info, 128, 256, 1, 0);
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pwrap = Mapper376PW;
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cwrap = Mapper376CW;
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info->Power = Mapper376Power;
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info->Reset = Mapper376Reset;
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AddExState(EXPREGS, 2, 0, "EXPR");
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}
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