updated bords/mappers/stuff to 0.98.15, lots of them got broken, asmcore support...

[fceu.git] / mappers / 6.c

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