100 lines
2.3 KiB
C++
100 lines
2.3 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) 2005 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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#include "mmc3.h"
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static uint8 *CHRRAM = NULL;
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static int masko8[8]={63,31,15,1,3,0,0,0};
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static void Super24PW(uint32 A, uint8 V)
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{
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uint32 NV=V&masko8[EXPREGS[0]&7];
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NV|=(EXPREGS[1]<<1);
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setprg8r((NV>>6)&0xF,A,NV);
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}
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static void Super24CW(uint32 A, uint8 V)
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{
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if(EXPREGS[0]&0x20)
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setchr1r(0x10,A,V);
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else
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{
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uint32 NV=V|(EXPREGS[2]<<3);
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setchr1r((NV>>9)&0xF,A,NV);
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}
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}
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static DECLFW(Super24Write)
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{
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switch(A)
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{
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case 0x5FF0: EXPREGS[0]=V;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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break;
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case 0x5FF1: EXPREGS[1]=V;
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FixMMC3PRG(MMC3_cmd);
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break;
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case 0x5FF2: EXPREGS[2]=V;
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FixMMC3CHR(MMC3_cmd);
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break;
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}
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}
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static void Super24Power(void)
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{
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EXPREGS[0]=0x24;
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EXPREGS[1]=159;
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EXPREGS[2]=0;
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GenMMC3Power();
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SetWriteHandler(0x5000,0x7FFF,Super24Write);
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SetReadHandler(0x8000,0xFFFF,CartBR);
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}
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static void Super24Reset(void)
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{
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EXPREGS[0]=0x24;
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EXPREGS[1]=159;
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EXPREGS[2]=0;
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MMC3RegReset();
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}
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static void Super24Close(void)
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{
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if(CHRRAM)
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FCEU_gfree(CHRRAM);
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CHRRAM = NULL;
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}
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void Super24_Init(CartInfo *info)
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{
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GenMMC3_Init(info, 128, 256, 0, 0);
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info->Power=Super24Power;
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info->Reset=Super24Reset;
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info->Close=Super24Close;
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cwrap=Super24CW;
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pwrap=Super24PW;
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CHRRAM=(uint8*)FCEU_gmalloc(8192);
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SetupCartCHRMapping(0x10, CHRRAM, 8192, 1);
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AddExState(CHRRAM, 8192, 0, "CHRR");
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AddExState(EXPREGS, 3, 0, "BIG2");
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}
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