94 lines
2.0 KiB
C++
94 lines
2.0 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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* BMC 42-in-1 reset switch
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*/
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#include "mapinc.h"
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static uint8 regs[4];
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static SFORMAT StateRegs[]=
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{
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{regs, 4, "REGS"},
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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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if(regs[0]&0x80)
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{
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if(regs[1]&0x80)
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setprg32(0x8000,regs[1]&0x1F);
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else
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{
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int bank=((regs[1]&0x1f)<<1)|((regs[1]>>6)&1);
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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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{
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int bank=((regs[1]&0x1f)<<1)|((regs[1]>>6)&1);
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setprg16(0xC000,bank);
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}
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if(regs[0]&0x20)
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setmirror(MI_H);
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else
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setmirror(MI_V);
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setchr8((regs[2]<<2)|((regs[0]>>1)&3));
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}
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static DECLFW(BMC64in1nrWriteLo)
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{
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regs[A&3]=V;
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Sync();
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}
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static DECLFW(BMC64in1nrWriteHi)
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{
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regs[3]=V;
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Sync();
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}
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static void BMC64in1nrPower(void)
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{
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regs[0]=0x80;
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regs[1]=0x43;
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regs[2]=regs[3]=0;
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Sync();
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SetWriteHandler(0x5000,0x5003,BMC64in1nrWriteLo);
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SetWriteHandler(0x8000,0xFFFF,BMC64in1nrWriteHi);
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SetReadHandler(0x8000,0xFFFF,CartBR);
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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 BMC64in1nr_Init(CartInfo *info)
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{
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info->Power=BMC64in1nrPower;
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AddExState(&StateRegs, ~0, 0, 0);
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GameStateRestore=StateRestore;
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}
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