merge mappers from FCEU-mm

[fceu.git] / boards / subor.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2005 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
#include "mapinc.h"\r
\r
static uint8 mode;\r
static uint8 DRegs[4];\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {DRegs, 4, "DREG"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  int base, bank;\r
  base = ((DRegs[0]^DRegs[1])&0x10)<<1;\r
  bank = (DRegs[2]^DRegs[3])&0x1f;\r
\r
  if(DRegs[1]&0x08)\r
  {\r
    bank &= 0xfe;\r
    if(mode==0)\r
    {\r
      setprg16(0x8000,base+bank+1);\r
      setprg16(0xC000,base+bank+0);\r
    }\r
    else\r
    {\r
      setprg16(0x8000,base+bank+0);\r
      setprg16(0xC000,base+bank+1);\r
    }\r
  }\r
  else\r
  {\r
    if(DRegs[1]&0x04)\r
    {\r
      setprg16(0x8000,0x1f);\r
      setprg16(0xC000,base+bank);\r
    }\r
    else\r
    {\r
      setprg16(0x8000,base+bank);\r
      if(mode==0)\r
         setprg16(0xC000,0x20);\r
      else\r
         setprg16(0xC000,0x07);\r
    }\r
  }\r
}\r
\r
static DECLFW(Mapper167_write)\r
{\r
  DRegs[(A>>13)&0x03]=V;\r
  Sync();\r
}\r
\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
void Mapper166_init(void)\r
{\r
  mode=1;\r
  DRegs[0]=DRegs[1]=DRegs[2]=DRegs[3]=0;\r
  Sync();\r
  SetWriteHandler(0x8000,0xFFFF,Mapper167_write);\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r
\r
void Mapper167_init(void)\r
{\r
  mode=0;\r
  DRegs[0]=DRegs[1]=DRegs[2]=DRegs[3]=0;\r
  Sync();\r
  SetWriteHandler(0x8000,0xFFFF,Mapper167_write);\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r