mirror of
https://github.com/dborth/fceugx.git
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74 lines
1.7 KiB
C
74 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) 2003 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 void Sync(void)
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{
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int x;
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setmirror(((mapbyte1[0]>>6)&1)^1);
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switch(mapbyte1[1]&0x3)
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{
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case 0x0:
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for(x=0;x<4;x++)
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setprg8(0x8000+x*8192,(((mapbyte1[0]&0x7F)<<1)+x)^(mapbyte1[0]>>7));
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break;
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case 0x2:
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for(x=0;x<4;x++)
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setprg8(0x8000+x*8192,((mapbyte1[0]&0x7F)<<1)+(mapbyte1[0]>>7));
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break;
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case 0x1:
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case 0x3:
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for(x=0;x<4;x++)
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{
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unsigned int b;
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b=mapbyte1[0]&0x7F;
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if(x>=2 && !(mapbyte1[1]&0x2))
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b=0x7F;
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setprg8(0x8000+x*8192,(x&1)+((b<<1)^(mapbyte1[0]>>7)));
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}
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break;
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}
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}
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static DECLFW(Mapper15_write)
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{
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mapbyte1[0]=V;
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mapbyte1[1]=A&3;
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Sync();
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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 Mapper15_init(void)
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{
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mapbyte1[0]=mapbyte1[1]=0;
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Sync();
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GameStateRestore=StateRestore;
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SetWriteHandler(0x8000,0xFFFF,Mapper15_write);
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}
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