mirror of
https://github.com/dborth/fceugx.git
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64 lines
1.7 KiB
C++
64 lines
1.7 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) 2005 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 uint16 cmdreg;
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static SFORMAT StateRegs[] =
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{
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{ &cmdreg, 2, "CREG" },
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{ 0 }
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};
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static void Sync(void) {
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if (cmdreg & 0x400)
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setmirror(MI_0);
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else
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setmirror(((cmdreg >> 13) & 1) ^ 1);
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if (cmdreg & 0x800) {
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setprg16(0x8000, ((cmdreg & 0x300) >> 3) | ((cmdreg & 0x1F) << 1) | ((cmdreg >> 12) & 1));
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setprg16(0xC000, ((cmdreg & 0x300) >> 3) | ((cmdreg & 0x1F) << 1) | ((cmdreg >> 12) & 1));
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} else
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setprg32(0x8000, ((cmdreg & 0x300) >> 4) | (cmdreg & 0x1F));
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}
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static DECLFW(M235Write) {
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cmdreg = A;
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Sync();
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}
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static void M235Power(void) {
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setchr8(0);
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SetWriteHandler(0x8000, 0xFFFF, M235Write);
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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cmdreg = 0;
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Sync();
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}
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static void M235Restore(int version) {
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Sync();
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}
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void Mapper235_Init(CartInfo *info) {
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info->Power = M235Power;
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GameStateRestore = M235Restore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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