merge mapper code from FCEUX

[fceu.git] / boards / 103.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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA\r
 */\r
\r
#include "mapinc.h"\r
\r
static uint8 reg0, reg1, reg2;\r
static uint8 *WRAM=NULL;\r
static uint32 WRAMSIZE;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {&reg0, 1, "REG0"},\r
  {&reg1, 1, "REG1"},\r
  {&reg2, 1, "REG2"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  setchr8(0);\r
  setprg8(0x8000,0xc);\r
  setprg8(0xe000,0xf);\r
  if(reg2&0x10)\r
  {\r
    setprg8(0x6000,reg0);\r
    setprg8(0xa000,0xd);\r
    setprg8(0xc000,0xe);\r
  }\r
  else\r
  {\r
    setprg8r(0x10,0x6000,0);\r
    setprg4(0xa000,(0xd<<1));\r
    setprg2(0xb000,(0xd<<2)+2);\r
    setprg2r(0x10,0xb800,4);\r
    setprg2r(0x10,0xc000,5);\r
    setprg2r(0x10,0xc800,6);\r
    setprg2r(0x10,0xd000,7);\r
    setprg2(0xd800,(0xe<<2)+3);\r
  }\r
  setmirror(reg1^1);\r
}\r
\r
static DECLFW(M103RamWrite0)\r
{\r
  WRAM[A&0x1FFF]=V;\r
}\r
\r
static DECLFW(M103RamWrite1)\r
{\r
  WRAM[0x2000+((A-0xB800)&0x1FFF)]=V;\r
}\r
\r
static DECLFW(M103Write0)\r
{\r
  reg0=V&0xf;\r
  Sync();\r
}\r
\r
static DECLFW(M103Write1)\r
{\r
  reg1=(V>>3)&1;\r
  Sync();\r
}\r
\r
static DECLFW(M103Write2)\r
{\r
  reg2=V;\r
  Sync();\r
}\r
\r
static void M103Power(void)\r
{\r
  reg0=reg1=0; reg2=0;\r
  Sync();\r
  SetReadHandler(0x6000,0x7FFF,CartBR);\r
  SetWriteHandler(0x6000,0x7FFF,M103RamWrite0);\r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
  SetWriteHandler(0xB800,0xD7FF,M103RamWrite1);\r
  SetWriteHandler(0x8000,0x8FFF,M103Write0);\r
  SetWriteHandler(0xE000,0xEFFF,M103Write1);\r
  SetWriteHandler(0xF000,0xFFFF,M103Write2);\r
}\r
\r
static void M103Close(void)\r
{\r
  if(WRAM)\r
    FCEU_gfree(WRAM);\r
  WRAM=NULL;\r
}\r
\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
void Mapper103_Init(CartInfo *info)\r
{\r
  info->Power=M103Power;\r
  info->Close=M103Close;\r
  GameStateRestore=StateRestore;\r
\r
  WRAMSIZE=16384;\r
  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
  AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r