/* FCE Ultra - NES/Famicom Emulator * * Copyright notice for this file: * Copyright (C) 2002 Xodnizel * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "mapinc.h" static uint8 FFEmode; #define FVRAM_BANK8(A,V) {VPage[0]=VPage[1]=VPage[2]=VPage[3]=VPage[4]=VPage[5]=VPage[6]=VPage[7]=V?&MapperExRAM[(V)<<13]-(A):&CHRRAM[(V)<<13]-(A);CHRBankList[0]=((V)<<3);CHRBankList[1]=((V)<<3)+1;CHRBankList[2]=((V)<<3)+2;CHRBankList[3]=((V)<<3)+3;CHRBankList[4]=((V)<<3)+4;CHRBankList[5]=((V)<<3)+5;CHRBankList[6]=((V)<<3)+6;CHRBankList[7]=((V)<<3)+7;PPUCHRRAM=0xFF;} static void FP_FASTAPASS(1) FFEIRQHook(int a) { if(IRQa) { IRQCount+=a; if(IRQCount>=0x10000) { X6502_IRQBegin(FCEU_IQEXT); IRQa=0; IRQCount=0; } } } DECLFW(Mapper6_write) { if(A<0x8000) { switch(A){ case 0x42FF:MIRROR_SET((V>>4)&1);break; case 0x42FE:onemir((V>>3)&2); FFEmode=V&0x80;break; case 0x4501:IRQa=0;X6502_IRQEnd(FCEU_IQEXT);break; case 0x4502:IRQCount&=0xFF00;IRQCount|=V;break; case 0x4503:IRQCount&=0xFF;IRQCount|=V<<8;IRQa=1;break; } } else { switch (FFEmode) { case 0x80: setchr8(V); break; default: ROM_BANK16(0x8000,V>>2); FVRAM_BANK8(0x0000,V&3); } } } void Mapper6_StateRestore(int version) { int x; for(x=0;x<8;x++) if(PPUCHRRAM&(1<7) VPage[x]=&MapperExRAM[(CHRBankList[x]&31)*0x400]-(x*0x400); else VPage[x]=&CHRRAM[(CHRBankList[x]&7)*0x400]-(x*0x400); } } void Mapper6_init(void) { MapIRQHook=FFEIRQHook; ROM_BANK16(0xc000,7); SetWriteHandler(0x4020,0x5fff,Mapper6_write); SetWriteHandler(0x8000,0xffff,Mapper6_write); MapStateRestore=Mapper6_StateRestore; }