release r2, update credits

[fceu.git] / boards / 15.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2006 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
 */\r
\r
#include "mapinc.h"\r
\r
static uint16 latchea;\r
static uint8 latched;\r
static uint8 *WRAM=NULL;\r
static uint32 WRAMSIZE;\r
static SFORMAT StateRegs[]=\r
{\r
  {&latchea, 2, "AREG"},\r
  {&latched, 1, "DREG"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  int i;\r
  setmirror(((latched>>6)&1)^1);\r
  switch(latchea)\r
  {\r
    case 0x8000:\r
      for(i=0;i<4;i++)\r
        setprg8(0x8000+(i<<13),(((latched&0x7F)<<1)+i)^(latched>>7));\r
      break;\r
    case 0x8002:\r
      for(i=0;i<4;i++)\r
        setprg8(0x8000+(i<<13),((latched&0x7F)<<1)+(latched>>7));\r
      break;\r
    case 0x8001:\r
    case 0x8003:\r
      for(i=0;i<4;i++)\r
      {\r
        unsigned int b;\r
        b=latched&0x7F;\r
        if(i>=2 && !(latchea&0x2))\r
          i=0x7F;\r
        setprg8(0x8000+(i<<13),(i&1)+((b<<1)^(latched>>7)));\r
      }\r
      break;\r
  }\r
}\r
\r
static DECLFW(M15Write)\r
{\r
  latchea=A;\r
  latched=V;\r
  Sync();\r
}\r
\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
static void M15Power(void)\r
{\r
  latchea=0x8000;\r
  latched=0;\r
  setchr8(0);\r
  setprg8r(0x10,0x6000,0);\r
  SetReadHandler(0x6000,0x7FFF,CartBR);\r
  SetWriteHandler(0x6000,0x7FFF,CartBW);\r
  SetWriteHandler(0x8000,0xFFFF,M15Write);\r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
  Sync();\r
}\r
\r
static void M15Reset(void)\r
{\r
  latchea=0x8000;\r
  latched=0;\r
  Sync();\r
}\r
\r
static void M15Close(void)\r
{\r
  if(WRAM)\r
    FCEU_gfree(WRAM);\r
  WRAM=NULL;\r
}\r
\r
void Mapper15_Init(CartInfo *info)\r
{\r
  info->Power=M15Power;\r
  info->Reset=M15Reset;\r
  info->Close=M15Close;\r
  GameStateRestore=StateRestore;\r
  WRAMSIZE=8192;\r
  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
  if(info->battery)\r
  {\r
    info->SaveGame[0]=WRAM;\r
    info->SaveGameLen[0]=WRAMSIZE;\r
  }\r
  AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r
\r