mirror of
https://github.com/dborth/fceugx.git
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87 lines
2.0 KiB
C++
87 lines
2.0 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2011 CaH4e3
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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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static uint8 prot[4], prg, mode, chr, mirr;
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static SFORMAT StateRegs[] =
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{
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{ prot, 4, "PROT" },
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{ &prg, 1, "PRG" },
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{ &chr, 1, "CHR" },
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{ &mode, 1, "MODE" },
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{ &mirr, 1, "MIRR" },
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{ 0 }
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};
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static void Sync(void) {
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if (mode) {
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setprg16(0x8000, prg);
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setprg16(0xC000, prg);
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} else
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setprg32(0x8000, prg >> 1);
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setchr8(chr);
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setmirror(mirr);
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}
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static DECLFW(M225Write) {
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uint32 bank = (A >> 14) & 1;
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mirr = (A >> 13) & 1;
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mode = (A >> 12) & 1;
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chr = (A & 0x3f) | (bank << 6);
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prg = ((A >> 6) & 0x3f) | (bank << 6);
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Sync();
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}
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static DECLFW(M225LoWrite) {
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}
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static DECLFR(M225LoRead) {
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return 0;
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}
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static void M225Power(void) {
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prg = 0;
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mode = 0;
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Sync();
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SetReadHandler(0x5000, 0x5FFF, M225LoRead);
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SetWriteHandler(0x5000, 0x5FFF, M225LoWrite);
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, M225Write);
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}
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static void M225Reset(void) {
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prg = 0;
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mode = 0;
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Sync();
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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 Mapper225_Init(CartInfo *info) {
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info->Reset = M225Reset;
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info->Power = M225Power;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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