release r2, update credits

[fceu.git] / boards / ax5705.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2007 CaH4e3\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
 * Super Bros. Pocker Mali (VRC4 mapper)\r
 */\r
\r
#include "mapinc.h"\r
\r
static uint8 IRQCount;//, IRQPre;\r
static uint8 IRQa;\r
static uint8 prg_reg[2];\r
static uint8 chr_reg[8];\r
static uint8 mirr;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {&IRQCount, 1, "IRQC"},\r
  {&IRQa, 1, "IRQA"},\r
  {prg_reg, 2, "PRG"},\r
  {chr_reg, 8, "CHR"},\r
  {&mirr, 1, "MIRR"},\r
  {0}\r
};\r
\r
/*\r
static void UNLAX5705IRQ(void)\r
{\r
  if(IRQa)\r
  {\r
    IRQCount++;\r
    if(IRQCount>=238)\r
    {\r
      X6502_IRQBegin(FCEU_IQEXT);\r
//      IRQa=0;\r
    }\r
  }\r
}*/\r
\r
static void Sync(void)\r
{\r
  setprg8(0x8000,prg_reg[0]);\r
  setprg8(0xA000,prg_reg[1]);\r
  setprg8(0xC000,~1);\r
  setprg8(0xE000,~0);\r
  int i;\r
  for(i=0; i<8; i++)\r
     setchr1(i<<10,chr_reg[i]);     \r
  setmirror(mirr^1);   \r
}\r
\r
static DECLFW(UNLAX5705Write)\r
{\r
//  if((A>=0xA008)&&(A<=0xE003))\r
//  {\r
//    int ind=(((A>>11)-6)|(A&1))&7;\r
//    int sar=((A&2)<<1);\r
//    chr_reg[ind]=(chr_reg[ind]&(0xF0>>sar))|((V&0x0F)<<sar);\r
//    SyncChr();\r
//  }\r
//  else \r
  switch(A&0xF00F)\r
  {\r
    case 0x8000: prg_reg[0]=((V&2)<<2)|((V&8)>>2)|(V&5); break; // EPROM dump have mixed PRG and CHR banks, data lines to mapper seems to be mixed\r
    case 0x8008: mirr=V&1; break;\r
    case 0xA000: prg_reg[1]=((V&2)<<2)|((V&8)>>2)|(V&5); break;\r
    case 0xA008: chr_reg[0]=(chr_reg[0]&0xF0)|(V&0x0F); break;\r
    case 0xA009: chr_reg[0]=(chr_reg[0]&0x0F)|((((V&4)>>1)|((V&2)<<1)|(V&0x09))<<4); break;\r
    case 0xA00A: chr_reg[1]=(chr_reg[1]&0xF0)|(V&0x0F); break;\r
    case 0xA00B: chr_reg[1]=(chr_reg[1]&0x0F)|((((V&4)>>1)|((V&2)<<1)|(V&0x09))<<4); break;\r
    case 0xC000: chr_reg[2]=(chr_reg[2]&0xF0)|(V&0x0F); break;\r
    case 0xC001: chr_reg[2]=(chr_reg[2]&0x0F)|((((V&4)>>1)|((V&2)<<1)|(V&0x09))<<4); break;\r
    case 0xC002: chr_reg[3]=(chr_reg[3]&0xF0)|(V&0x0F); break;\r
    case 0xC003: chr_reg[3]=(chr_reg[3]&0x0F)|((((V&4)>>1)|((V&2)<<1)|(V&0x09))<<4); break;\r
    case 0xC008: chr_reg[4]=(chr_reg[4]&0xF0)|(V&0x0F); break;\r
    case 0xC009: chr_reg[4]=(chr_reg[4]&0x0F)|((((V&4)>>1)|((V&2)<<1)|(V&0x09))<<4); break;\r
    case 0xC00A: chr_reg[5]=(chr_reg[5]&0xF0)|(V&0x0F); break;\r
    case 0xC00B: chr_reg[5]=(chr_reg[5]&0x0F)|((((V&4)>>1)|((V&2)<<1)|(V&0x09))<<4); break;\r
    case 0xE000: chr_reg[6]=(chr_reg[6]&0xF0)|(V&0x0F); break;\r
    case 0xE001: chr_reg[6]=(chr_reg[6]&0x0F)|((((V&4)>>1)|((V&2)<<1)|(V&0x09))<<4); break;\r
    case 0xE002: chr_reg[7]=(chr_reg[7]&0xF0)|(V&0x0F); break;\r
    case 0xE003: chr_reg[7]=(chr_reg[7]&0x0F)|((((V&4)>>1)|((V&2)<<1)|(V&0x09))<<4); break;\r
//    case 0x800A: X6502_IRQEnd(FCEU_IQEXT); IRQa=0; break;\r
//    case 0xE00B: X6502_IRQEnd(FCEU_IQEXT); IRQa=IRQCount=V; /*if(scanline<240) IRQCount-=8; else IRQCount+=4;*/  break;\r
  }\r
  Sync();\r
}\r
\r
static void UNLAX5705Power(void)\r
{\r
  Sync();\r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
  SetWriteHandler(0x8000,0xFFFF,UNLAX5705Write);\r
}\r
\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
void UNLAX5705_Init(CartInfo *info)\r
{\r
  info->Power=UNLAX5705Power;\r
//  GameHBIRQHook=UNLAX5705IRQ;\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r