merge mapper code from FCEUX

[fceu.git] / boards / sheroes.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
 */\r
\r
#include "mapinc.h"\r
#include "mmc3.h"\r
\r
static uint8 *CHRRAM;		 // there is no more extern CHRRAM in mmc3.h
							 // I need chrram here and local   static == local\r
static uint8 tekker;\r
\r
static void MSHCW(uint32 A, uint8 V)\r
{\r
  if(EXPREGS[0]&0x40)\r
    setchr8r(0x10,0);\r
  else\r
  {\r
    if(A<0x800)\r
      setchr1(A,V|((EXPREGS[0]&8)<<5));\r
    else if(A<0x1000)\r
      setchr1(A,V|((EXPREGS[0]&4)<<6));\r
    else if(A<0x1800)\r
      setchr1(A,V|((EXPREGS[0]&1)<<8));\r
    else\r
      setchr1(A,V|((EXPREGS[0]&2)<<7));\r
  }\r
}\r
\r
static DECLFW(MSHWrite)\r
{\r
  EXPREGS[0]=V;\r
  FixMMC3CHR(MMC3_cmd);\r
}\r
\r
static DECLFR(MSHRead)\r
{\r
  return(tekker);\r
}\r
\r
static void MSHReset(void)\r
{\r
  MMC3RegReset();\r
  tekker^=0xFF; \r
}\r
\r
static void MSHPower(void)\r
{\r
  tekker=0x00;\r
  GenMMC3Power();\r
  SetWriteHandler(0x4100,0x4100,MSHWrite);\r
  SetReadHandler(0x4100,0x4100,MSHRead);\r
}\r
\r
static void MSHClose(void)\r
{\r
  if(CHRRAM)\r
    FCEU_gfree(CHRRAM);\r
  CHRRAM=NULL;\r
}\r
\r
void UNLSHeroes_Init(CartInfo *info)\r
{\r
  GenMMC3_Init(info, 256, 512, 0, 0);\r
  cwrap=MSHCW;\r
  info->Power=MSHPower;\r
  info->Reset=MSHReset;\r
  info->Close=MSHClose;\r
  CHRRAM = (uint8*)FCEU_gmalloc(8192);\r
  SetupCartCHRMapping(0x10, CHRRAM, 8192, 1);\r
  AddExState(EXPREGS, 4, 0, "EXPR");\r
  AddExState(&tekker, 1, 0, "DIPSW");\r
}\r