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https://github.com/dborth/fceugx.git
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102 lines
2.2 KiB
C++
102 lines
2.2 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) 2007 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "mapinc.h"
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static uint8 reg[3];
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static uint8 *WRAM=NULL;
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static uint32 WRAMSIZE;
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static SFORMAT StateRegs[]=
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{
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{reg, 3, "REGS"},
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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(reg[0]);
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setprg8r(0x10,0x6000,0);
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setchr8(0);
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setprg32(0x8000,(reg[1]+reg[2])&0xf);
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}
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static DECLFW(M178Write0)
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{
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reg[0]=(V&1)^1;
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Sync();
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}
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static DECLFW(M178Write1)
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{
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reg[1]=(V>>1)&0xf;
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Sync();
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}
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static DECLFW(M178Write2)
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{
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reg[2]=(V<<2)&0xf;
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Sync();
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}
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static void M178Power(void)
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{
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reg[0]=1; reg[1]=0; reg[2]=0;
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Sync();
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SetReadHandler(0x6000,0x7FFF,CartBR);
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SetWriteHandler(0x6000,0x7FFF,CartBW);
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SetReadHandler(0x8000,0xFFFF,CartBR);
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SetWriteHandler(0x4800,0x4800,M178Write0);
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SetWriteHandler(0x4801,0x4801,M178Write1);
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SetWriteHandler(0x4802,0x4802,M178Write2);
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}
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static void M178Close(void)
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{
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if(WRAM)
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FCEU_gfree(WRAM);
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WRAM=NULL;
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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 Mapper178_Init(CartInfo *info)
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{
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info->Power=M178Power;
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info->Close=M178Close;
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GameStateRestore=StateRestore;
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WRAMSIZE=8192;
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WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
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SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
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if(info->battery)
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{
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info->SaveGame[0]=WRAM;
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info->SaveGameLen[0]=WRAMSIZE;
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}
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AddExState(WRAM, WRAMSIZE, 0, "WRAM");
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AddExState(&StateRegs, ~0, 0, 0);
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}
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