75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/* FCEUmm - NES/Famicom Emulator
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*
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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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*/
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/* NES 2.0 mapper 335 is used for a 10-in-1 multicart.
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* Its UNIF board name is BMC-CTC-09.
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* http://wiki.nesdev.com/w/index.php/NES_2.0_Mapper_335 */
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#include "mapinc.h"
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#define PRG 0
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#define CHR 1
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static uint8 regs[2];
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static SFORMAT StateRegs[] =
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{
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{ regs, 2, "REGS" },
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{ 0 }
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};
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static void Sync(void) {
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if (regs[PRG] & 0x10) {
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setprg16(0x8000, ((regs[PRG] & 0x07) << 1) | ((regs[PRG] >> 3) & 1));
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setprg16(0xC000, ((regs[PRG] & 0x07) << 1) | ((regs[PRG] >> 3) & 1));
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} else
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setprg32(0x8000, regs[PRG] & 0x07);
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setchr8(regs[CHR] & 0x0F);
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setmirror(((regs[PRG] >> 5) & 1) ^ 1);
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}
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static DECLFW(WritePRG) {
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regs[PRG] = V;
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Sync();
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}
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static DECLFW(WriteCHR) {
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regs[CHR] = V;
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Sync();
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}
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static void BMCCTC09Power(void) {
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Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xBFFF, WriteCHR);
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SetWriteHandler(0xC000, 0xFFFF, WritePRG);
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}
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static void StateRestore(int version) {
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Sync();
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}
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void BMCCTC09_Init(CartInfo *info) {
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info->Power = BMCCTC09Power;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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