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https://github.com/dborth/fceugx.git
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65 lines
1.6 KiB
C++
65 lines
1.6 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) 2012 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 preg, mirr;
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static SFORMAT StateRegs[] =
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{
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{ &preg, 1, "PREG" },
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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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setprg16(0x8000, preg);
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setprg16(0xC000, ~0);
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setchr8(0);
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if(mirr)
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setmirror(mirr);
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}
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static DECLFW(M71Write) {
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if ((A & 0xF000) == 0x9000)
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mirr = MI_0 + ((V >> 4) & 1); // 2-in-1, some carts are normal hardwire V/H mirror, some uses mapper selectable 0/1 mirror
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else
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preg = V;
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Sync();
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}
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static void M71Power(void) {
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mirr = 0;
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Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, M71Write);
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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 Mapper71_Init(CartInfo *info) {
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info->Power = M71Power;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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