106 lines
2.4 KiB
C++
106 lines
2.4 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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#include "../sound.h"
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static void M187CW(uint32 A, uint8 V)
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{
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if((A&0x1000)==((MMC3_cmd&0x80)<<5))
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setchr1(A,V|0x100);
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else
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setchr1(A,V);
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}
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static void M187PW(uint32 A, uint8 V)
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{
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if(EXPREGS[0]&0x80)
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{
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uint8 bank=EXPREGS[0]&0x1F;
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if(EXPREGS[0]&0x20)
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setprg32(0x8000,bank>>2);
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else
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{
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setprg16(0x8000,bank);
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setprg16(0xC000,bank);
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}
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}
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else
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setprg8(A,V&0x3F);
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}
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static DECLFW(M187Write8000)
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{
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EXPREGS[2]=1;
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MMC3_CMDWrite(A,V);
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}
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static DECLFW(M187Write8001)
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{
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if(EXPREGS[2])
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MMC3_CMDWrite(A,V);
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}
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static DECLFW(M187Write8003)
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{
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EXPREGS[2]=0;
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if(V==0x28)setprg8(0xC000,0x17);
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else if(V==0x2A)setprg8(0xA000,0x0F);
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}
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static DECLFW(M187WriteLo)
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{
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EXPREGS[1]=V;
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if(A==0x5000)
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{
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EXPREGS[0]=V;
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FixMMC3PRG(MMC3_cmd);
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}
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}
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static uint8 prot_data[4] = { 0x83, 0x83, 0x42, 0x00 };
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static DECLFR(M187Read)
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{
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return prot_data[EXPREGS[1]&3];
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}
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static void M187Power(void)
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{
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EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=0;
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GenMMC3Power();
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Write_IRQFM(0x4017,0x40);
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SetReadHandler(0x5000,0x5FFF,M187Read);
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SetWriteHandler(0x5000,0x5FFF,M187WriteLo);
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SetWriteHandler(0x8000,0x8000,M187Write8000);
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SetWriteHandler(0x8001,0x8001,M187Write8001);
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SetWriteHandler(0x8003,0x8003,M187Write8003);
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}
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void Mapper187_Init(CartInfo *info)
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{
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GenMMC3_Init(info, 256, 256, 0, 0);
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pwrap=M187PW;
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cwrap=M187CW;
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info->Power=M187Power;
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AddExState(EXPREGS, 3, 0, "EXPR");
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}
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