merge mappers from FCEU-mm

[fceu.git] / boards / 96.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 1998 BERO\r
 *  Copyright (C) 2002 Xodnizel\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
 * Oeka-kids board\r
 *\r
 * I might want to add some code to the mapper 96 PPU hook function\r
 * to not change CHR banks if the attribute table is being accessed,\r
 * if I make emulation a little more accurate in the future.\r
 *\r
 */\r
\r
#include "mapinc.h"\r
\r
static uint8 reg, ppulatch;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {&reg, 1, "REG"},\r
  {&ppulatch, 1, "PPUL"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  setmirror(MI_0);\r
  setprg32(0x8000,reg & 3);\r
  setchr4(0x0000,(reg & 4) | ppulatch);\r
  setchr4(0x1000,(reg & 4) | 3);\r
}\r
\r
static DECLFW(M96Write)\r
{\r
  reg = V;\r
  Sync();\r
}\r
\r
static void FP_FASTAPASS(1) M96Hook(uint32 A)\r
{\r
  if((A & 0x3000) == 0x2000)\r
  {\r
    ppulatch = (A>>8) & 3;\r
    Sync();\r
  }\r
}\r
\r
static void M96Power(void)\r
{\r
  reg = ppulatch = 0;\r
  Sync();\r
  SetReadHandler(0x8000,0xffff,CartBR);\r
  SetWriteHandler(0x8000,0xffff,M96Write);\r
}\r
\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
void Mapper96_Init(CartInfo *info)\r
{\r
  info->Power=M96Power;\r
  PPU_hook=M96Hook;\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r
\r