mirror of
https://github.com/dborth/fceugx.git
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78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
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/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 1998 BERO
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* Copyright (C) 2002 Xodnizel
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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 reg, ppulatch;
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static SFORMAT StateRegs[]=
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{
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{®, 1, "REG"},
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{&ppulatch, 1, "PPUL"},
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{0}
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};
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static void Sync(void)
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{
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setmirror(MI_0);
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setprg32(0x8000,reg & 3);
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setchr4(0x0000,(reg & 4) | ppulatch);
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setchr4(0x1000,(reg & 4) | 3);
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}
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static DECLFW(M96Write)
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{
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reg = V;
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Sync();
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}
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static void M96Hook(uint32 A)
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{
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if((A & 0x3000) == 0x2000)
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{
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ppulatch = (A>>8) & 3;
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Sync();
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}
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}
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static void M96Power(void)
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{
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reg = ppulatch = 0;
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Sync();
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SetReadHandler(0x8000,0xffff,CartBR);
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SetWriteHandler(0x8000,0xffff,M96Write);
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}
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static void StateRestore(int version)
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{
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Sync();
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}
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void Mapper96_Init(CartInfo *info)
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{
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info->Power=M96Power;
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PPU_hook=M96Hook;
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GameStateRestore=StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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