65 lines
1.8 KiB
C
65 lines
1.8 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 negativeExponent
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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 377 - NES 2.0 Mapper 377 is used for the
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* 1998 Super Game 8-in-1 (JY-111) pirate multicart. It works similarly to Mapper 267 except it has an outer 256KiB PRG-ROM bank.
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*/
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#include "mapinc.h"
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#include "mmc3.h"
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#define OUTER_BANK (((EXPREGS[0] & 0x20) >> 2) | (EXPREGS[0] & 0x06))
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static void M377CW(uint32 A, uint8 V) {
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setchr1(A, (V & 0x7F) | (OUTER_BANK << 6));
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}
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static void M377PW(uint32 A, uint8 V) {
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setprg8(A, (V & 0x0F) | (OUTER_BANK << 3));
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}
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static DECLFW(M377Write) {
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if (!(EXPREGS[0] & 0x80)) {
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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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}
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}
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static void M377Reset(void) {
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EXPREGS[0] = 0;
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MMC3RegReset();
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}
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static void M377Power(void) {
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EXPREGS[0] = 0;
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GenMMC3Power();
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SetWriteHandler(0x6000, 0x7FFF, M377Write);
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}
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void Mapper377_Init(CartInfo *info) {
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GenMMC3_Init(info, 128, 128, 0, 0);
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cwrap = M377CW;
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pwrap = M377PW;
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info->Reset = M377Reset;
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info->Power = M377Power;
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AddExState(EXPREGS, 1, 0, "EXPR");
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}
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