merge mappers from FCEU-mm

[fceu.git] / boards / 82.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
 * Taito X1-017 board, battery backed\r
 *\r
 */\r
\r
#include "mapinc.h"\r
\r
static uint8 regs[9], ctrl;\r
static uint8 *WRAM=NULL;\r
static uint32 WRAMSIZE;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {regs, 9, "REGS"},\r
  {&ctrl, 1, "CTRL"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  uint32 swap = ((ctrl & 2) << 11);\r
  setchr2(0x0000^swap,regs[0]>>1);  \r
  setchr2(0x0800^swap,regs[1]>>1);  \r
  setchr1(0x1000^swap,regs[2]);  \r
  setchr1(0x1400^swap,regs[3]);  \r
  setchr1(0x1800^swap,regs[4]);  \r
  setchr1(0x1c00^swap,regs[5]);  \r
  setprg8r(0x10,0x6000,0);\r
  setprg8(0x8000,regs[6]);\r
  setprg8(0xA000,regs[7]);\r
  setprg8(0xC000,regs[8]);\r
  setprg8(0xE000,~0);\r
  setmirror(ctrl & 1);\r
}\r
\r
static DECLFW(M82Write)\r
{\r
  if(A <= 0x7ef5)\r
    regs[A & 7] = V;\r
  else\r
    switch(A)\r
    {\r
      case 0x7ef6: ctrl = V & 3; break;\r
      case 0x7efa: regs[6] = V >> 2; break;\r
      case 0x7efb: regs[7] = V >> 2; break;\r
      case 0x7efc: regs[8] = V >> 2; break;\r
    }\r
  Sync();\r
}\r
\r
static void M82Power(void)\r
{\r
  Sync();\r
  SetReadHandler(0x6000,0xffff,CartBR);\r
  SetWriteHandler(0x6000,0x7fff,CartBW);\r
  SetWriteHandler(0x7ef0,0x7efc,M82Write);  // external WRAM might end at $73FF\r
}\r
\r
static void M82Close(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 Mapper82_Init(CartInfo *info)\r
{\r
  info->Power=M82Power;\r
  info->Power=M82Close;\r
\r
  WRAMSIZE=8192;\r
  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
  AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
  if(info->battery)\r
  {\r
    info->SaveGame[0]=WRAM;\r
    info->SaveGameLen[0]=WRAMSIZE;\r
  }\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r