51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
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/* 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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/* 2019-05-29 - Mapper 224, KT-008
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* iNES Mapper 224 is used for the 晶科泰 (Jncota) KT-008 PCB.
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* It's an MMC3 clone that supports 1024 KiB of PRG-ROM through an additional
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* outer bank register at $5000.
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* http://wiki.nesdev.com/w/index.php/INES_Mapper_224 */
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#include "mapinc.h"
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#include "mmc3.h"
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static void M224PW(uint32 A, uint8 V) {
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setprg8(A, V & 0x3f | (EXPREGS[0] << 4) & 0x40);
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}
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static DECLFW(Mapper224Write) {
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EXPREGS[0] = V;
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FixMMC3PRG(MMC3_cmd);
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}
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static void M224Power(void) {
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EXPREGS[0] = 0;
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GenMMC3Power();
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SetWriteHandler(0x5000, 0x5000, Mapper224Write);
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}
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void Mapper224_Init(CartInfo *info) {
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GenMMC3_Init(info, 1024, 0, 8, 0);
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pwrap = M224PW;
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info->Power = M224Power;
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AddExState(EXPREGS, 1, 0, "EXPR");
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}
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