85 lines
1.9 KiB
C
85 lines
1.9 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 uint16 addrreg;
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static uint8 datareg;
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static uint8 busy;
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static SFORMAT StateRegs[]=
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{
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{&addrreg, 2, "ADDRREG"},
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{&datareg, 1, "DATAREG"},
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{&busy, 1, "BUSY"},
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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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uint16 base=((addrreg&0x60)>>2)|((addrreg&0x100)>>3);
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setprg16(0x8000,(datareg&7)|base);
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setprg16(0xC000,7|base);
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setmirror(((addrreg&2)>>1)^1);
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}
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static DECLFW(BMCT262Write)
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{
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if(busy||(A==0x8000))
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datareg=V;
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else
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{
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addrreg=A;
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busy=1;
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}
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Sync();
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}
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static void BMCT262Power(void)
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{
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setchr8(0);
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SetWriteHandler(0x8000,0xFFFF,BMCT262Write);
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SetReadHandler(0x8000,0xFFFF,CartBR);
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busy=0;
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addrreg=0;
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datareg=0xff;
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Sync();
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}
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static void BMCT262Reset(void)
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{
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busy=0;
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addrreg=0;
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datareg=0;
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Sync();
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}
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static void BMCT262Restore(int version)
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{
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Sync();
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}
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void BMCT262_Init(CartInfo *info)
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{
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info->Power=BMCT262Power;
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info->Reset=BMCT262Reset;
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GameStateRestore=BMCT262Restore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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