merge mapper code from FCEUX

[fceu.git] / boards / n625092.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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA\r
 * 700in1 and 400in1 carts\r
 */\r
 \r
\r
#include "mapinc.h"\r
\r
static uint16 cmd, bank;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {&cmd, 2, "CMD"},\r
  {&bank, 2, "BANK"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  setmirror((cmd&1)^1);\r
  setchr8(0);\r
  if(cmd&2)\r
  {\r
    if(cmd&0x100)\r
    {\r
      setprg16(0x8000,((cmd&0xe0)>>2)|bank);\r
      setprg16(0xC000,((cmd&0xe0)>>2)|7);  \r
    }\r
    else\r
    {\r
      setprg16(0x8000,((cmd&0xe0)>>2)|(bank&6));\r
      setprg16(0xC000,((cmd&0xe0)>>2)|((bank&6)|1));  \r
    }\r
  }\r
  else\r
  {\r
    setprg16(0x8000,((cmd&0xe0)>>2)|bank);\r
    setprg16(0xC000,((cmd&0xe0)>>2)|bank);\r
  }  \r
}\r
\r
static DECLFW(UNLN625092WriteCommand)\r
{\r
  cmd=A;  \r
  Sync();\r
}\r
\r
static DECLFW(UNLN625092WriteBank)\r
{ \r
  bank=A&7;\r
  Sync();\r
}\r
\r
static void UNLN625092Power(void)\r
{\r
  cmd=0;\r
  bank=0;\r
  Sync();\r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
  SetWriteHandler(0x8000,0xBFFF,UNLN625092WriteCommand);\r
  SetWriteHandler(0xC000,0xFFFF,UNLN625092WriteBank);\r
}\r
\r
static void UNLN625092Reset(void)\r
{\r
  cmd=0;\r
  bank=0;\r
}\r
\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
void UNLN625092_Init(CartInfo *info)\r
{\r
  info->Reset=UNLN625092Reset;\r
  info->Power=UNLN625092Power;\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r