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https://github.com/dborth/fceugx.git
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68 lines
1.7 KiB
C
68 lines
1.7 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) 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 DECLFW(Mapper255_write)
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{
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uint32 pbank=(A>>7)&0x1F;
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uint32 cbank=A&0x3F;
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uint32 rbank=(A>>14)&1;
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// printf("$%04x:$%02x\n",A,V);
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// printf("%2x:%2x:%2x,%2x\n",pbank,cbank,rbank,(A&0x40)>>6);
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if(A&0x1000)
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{
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ROM_BANK16(0x8000,((pbank|(rbank<<5))<<1)|((A&0x40)>>6));
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ROM_BANK16(0xc000,((pbank|(rbank<<5))<<1)|((A&0x40)>>6));
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}
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else
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{
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ROM_BANK32(pbank|(rbank<<5));
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}
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MIRROR_SET((A>>13)&1);
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VROM_BANK8((rbank<<6)|cbank);
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}
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static DECLFW(Mapper255_wl)
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{
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// printf("Wr: $%04x:$%02x\n",A,V);
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mapbyte1[A&3]=V&0xF;
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}
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static DECLFR(Mapper255_read)
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{
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//printf("Rd: $%04x\n",A);
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return(mapbyte1[A&3]); //|(X.DB&0xF0));
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}
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void Mapper255_init(void)
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{
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mapbyte1[0]=mapbyte1[1]=0xF;
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ROM_BANK32(0);
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VROM_BANK8(0);
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SetWriteHandler(0x5800,0x5FFF,Mapper255_wl);
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SetWriteHandler(0x8000,0xffff,Mapper255_write);
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SetReadHandler(0x5800,0x5FFF,Mapper255_read);
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}
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