merge mappers from FCEU-mm

[fceu.git] / boards / 34.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2012 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
 * Many-in-one hacked mapper crap.\r
 * \r
 * Original BNROM is actually AxROM variations without mirroring control,\r
 * and haven't SRAM on-board, so it must be removed from here\r
 *\r
 * Difficult banking is what NINA board doing, most hacks for 34 mapper are\r
 * NINA hacks, so this is actually 34 mapper\r
 *\r
 */\r
\r
#include "mapinc.h"\r
\r
static uint8 regs[3];\r
static uint8 *WRAM=NULL;\r
static uint32 WRAMSIZE;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {regs, 3, "REGS"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  setprg8r(0x10,0x6000,0);\r
  setprg32(0x8000,regs[0]);\r
  setchr4(0x0000,regs[1]);  \r
  setchr4(0x1000,regs[2]);  \r
}\r
\r
static DECLFW(M34Write)\r
{\r
  if(A>=0x8000)\r
    regs[0] = V;\r
  else\r
    switch(A)\r
    {\r
      case 0x7ffd: regs[0] = V; break;\r
      case 0x7ffe: regs[1] = V; break;\r
      case 0x7fff: regs[2] = V; break;\r
    }\r
  Sync();\r
}\r
\r
static void M34Power(void)\r
{\r
  regs[0] = 0;\r
  Sync();\r
  SetReadHandler(0x6000,0x7ffc,CartBR);\r
  SetWriteHandler(0x6000,0x7ffc,CartBW);\r
  SetReadHandler(0x8000,0xffff,CartBR);\r
  SetWriteHandler(0x7ffd,0xffff,M34Write);\r
}\r
\r
static void M34Close(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 Mapper34_Init(CartInfo *info)\r
{\r
  info->Power=M34Power;\r
  info->Close=M34Close;\r
  GameStateRestore=StateRestore;\r
\r
  WRAMSIZE=8192;\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