76 lines
1.7 KiB
C
76 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) 2006 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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static uint8 reg[4];
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static SFORMAT StateRegs[]=
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{
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{reg, 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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setprg32(0x8000,(reg[2]>>2)&1);
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setchr8(reg[2]&3);
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}
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static DECLFW(UNL22211WriteLo)
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{
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// FCEU_printf("bs %04x %02x\n",A,V);
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reg[A&3]=V;
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}
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static DECLFW(UNL22211WriteHi)
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{
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// FCEU_printf("bs %04x %02x\n",A,V);
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Sync();
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}
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static DECLFR(UNL22211ReadLo)
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{
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if(reg[3])
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return reg[2];
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else
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return X.DB;
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}
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static void UNL22211Power(void)
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{
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Sync();
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SetReadHandler(0x8000,0xFFFF,CartBR);
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SetReadHandler(0x4100,0x4100,UNL22211ReadLo);
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SetWriteHandler(0x4100,0x4103,UNL22211WriteLo);
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SetWriteHandler(0x8000,0xFFFF,UNL22211WriteHi);
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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 UNL22211_Init(CartInfo *info)
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{
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info->Power=UNL22211Power;
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GameStateRestore=StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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