mirror of
https://github.com/dborth/fceugx.git
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116 lines
2.5 KiB
C++
116 lines
2.5 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 reg0, reg1, reg2;
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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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{®0, 1, "REG0"},
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{®1, 1, "REG1"},
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{®2, 1, "REG2"},
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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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setchr8(0);
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setprg8(0x8000,0xc);
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setprg8(0xe000,0xf);
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if(reg2&0x10)
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{
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setprg8(0x6000,reg0);
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setprg8(0xa000,0xd);
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setprg8(0xc000,0xe);
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}
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else
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{
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setprg8r(0x10,0x6000,0);
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setprg4(0xa000,(0xd<<1));
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setprg2(0xb000,(0xd<<2)+2);
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setprg2r(0x10,0xb800,4);
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setprg2r(0x10,0xc000,5);
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setprg2r(0x10,0xc800,6);
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setprg2r(0x10,0xd000,7);
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setprg2(0xd800,(0xe<<2)+3);
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}
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setmirror(reg1);
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}
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static DECLFW(M103Write0)
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{
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reg0=V&0xf;
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Sync();
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}
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static DECLFW(M103Write1)
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{
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reg1=(V>>3)&1;
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Sync();
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}
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static DECLFW(M103Write2)
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{
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reg2=V;
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Sync();
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}
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static void M103Power(void)
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{
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reg0=reg1=0; reg2=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(0xB800,0xD7FF,CartBW);
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SetWriteHandler(0x8000,0x8FFF,M103Write0);
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SetWriteHandler(0xE000,0xEFFF,M103Write1);
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SetWriteHandler(0xF000,0xFFFF,M103Write2);
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}
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static void M103Close(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 Mapper103_Init(CartInfo *info)
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{
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info->Power=M103Power;
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info->Close=M103Close;
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GameStateRestore=StateRestore;
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WRAMSIZE=16384;
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WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
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SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
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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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