merge mapper code from FCEUX

[fceu.git] / boards / n-c22m.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2006 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
 * Mortal Kombat 2 YOKO */\r
\r
#include "mapinc.h"\r
#include "mmc3.h"\r
\r
static uint8 reg[8];\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {reg, 8, "REGS"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
//  FCEU_printf("(%02x, %02x)\n",reg[3],reg[4]);\r
  setprg8(0x8000,reg[0]);\r
  setprg8(0xA000,reg[1]);\r
  setprg8(0xC000,reg[2]);\r
  setprg8(0xE000,~0);\r
//  setchr2(0x0000,reg[3]);\r
//  setchr2(0x0800,reg[4]);\r
//  setchr2(0x1000,reg[5]);\r
//  setchr2(0x1800,reg[6]);\r
  setchr2(0x0000,reg[3]);\r
  setchr2(0x0800,reg[4]);\r
  setchr2(0x1000,reg[5]);\r
  setchr2(0x1800,reg[6]);\r
}\r
\r
static DECLFW(MCN22MWrite)\r
{\r
//FCEU_printf("bs %04x %02x\n",A,V);\r
  switch(A)\r
  {\r
    case 0x8c00:\r
    case 0x8c01:\r
    case 0x8c02: reg[A&3]=V; break;\r
    case 0x8d10: reg[3]=V; break;\r
    case 0x8d11: reg[4]=V; break;\r
    case 0x8d16: reg[5]=V; break;\r
    case 0x8d17: reg[6]=V; break;\r
  }\r
  Sync();\r
}\r
\r
static void MCN22MPower(void)\r
{\r
  reg[0]=reg[1]=reg[2]=0;\r
  Sync();  \r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
  SetWriteHandler(0x8000,0xFFFF,MCN22MWrite);\r
}\r
/*\r
static void MCN22MIRQHook(void)\r
{\r
  int count = IRQCount;\r
  if(!count || IRQReload)\r
  {\r
     IRQCount = IRQLatch;\r
     IRQReload = 0;\r
  }\r
  else\r
     IRQCount--;\r
  if(!IRQCount)\r
  {\r
     if(IRQa)\r
     {\r
        X6502_IRQBegin(FCEU_IQEXT);\r
     }\r
  }\r
}\r
*/\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
void UNLCN22M_Init(CartInfo *info)\r
{\r
  info->Power=MCN22MPower;\r
//  GameHBIRQHook=MCN22MIRQHook;\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r