mirror of
https://github.com/dborth/fceugx.git
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86 lines
1.8 KiB
C
86 lines
1.8 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) 2002 Xodnizel
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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 cmd;
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static uint8 DRegs[8];
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static SFORMAT DEI_StateRegs[]=
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{
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{&cmd, 1, "CMD"},
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{DRegs, 8, "DREG"},
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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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int x;
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setchr2(0x0000,DRegs[0]);
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setchr2(0x0800,DRegs[1]);
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for(x=0;x<4;x++)
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setchr1(0x1000+(x<<10),DRegs[2+x]);
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setprg8(0x8000,DRegs[6]);
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setprg8(0xa000,DRegs[7]);
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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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static DECLFW(DEIWrite)
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{
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switch(A&0x8001)
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{
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case 0x8000:cmd=V&0x07;break;
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case 0x8001:if(cmd<=0x05) V&=0x3F;
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else V&=0x0F;
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if(cmd<=0x01) V>>=1;
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DRegs[cmd&0x07]=V;
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Sync();
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break;
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}
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}
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static void DEIPower(void)
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{
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setprg8(0xc000,0xE);
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setprg8(0xe000,0xF);
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cmd=0;
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memset(DRegs,0,8);
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Sync();
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SetReadHandler(0x8000,0xFFFF,CartBR);
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SetWriteHandler(0x8000,0xFFFF,DEIWrite);
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}
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void DEIROM_Init(CartInfo *info)
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{
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info->Power=DEIPower;
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GameStateRestore=StateRestore;
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AddExState(&DEI_StateRegs, ~0, 0, 0);
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}
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void Mapper206_Init(CartInfo *info)
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{
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DEIROM_Init(info);
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}
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