merge mapper code from FCEUX

[fceu.git] / boards / bandai.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2007 CaH4e3\r
 *  Copyright (C) 2011 FCEUX team\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
 * Bandai mappers\r
 *\r
 */\r
\r
//Famicom Jump 2 should get transformed to m153\r
//All other games are not supporting EEPROM saving right now. \r
//We may need to distinguish between 16 and 159 in order to know the EEPROM configuration.\r
//Until then, we just return 0x00 from the EEPROM read\r
\r
#include "mapinc.h"\r
\r
static uint8 reg[16], is153;\r
static uint8 IRQa;\r
static int16 IRQCount, IRQLatch;\r
\r
static uint8 *WRAM=NULL;\r
static uint32 WRAMSIZE;\r
\r
static SFORMAT StateRegs[]=\r
{\r
  {reg, 16, "REGS"},\r
  {&IRQa, 1, "IRQA"},\r
  {&IRQCount, 2, "IRQC"},\r
  {&IRQLatch, 2, "IRQL"}, // need for Famicom Jump II - Saikyou no 7 Nin (J) [!]\r
  {0}\r
};\r
\r
static void BandaiIRQHook(int a)\r
{\r
  if(IRQa)\r
  {\r
    IRQCount -= a;\r
    if(IRQCount<0)\r
    {\r
      X6502_IRQBegin(FCEU_IQEXT);\r
      IRQa = 0;\r
      IRQCount = -1;\r
    }\r
  }\r
}\r
\r
static void BandaiSync(void)\r
{\r
  if(is153)\r
  {\r
    int base=(reg[0]&1)<<4;\r
    setchr8(0);\r
    setprg16(0x8000,(reg[8]&0x0F)|base);\r
    setprg16(0xC000,0x0F|base);\r
  }\r
  else\r
  {\r
    int i;\r
    for(i=0; i<8; i++) setchr1(i<<10,reg[i]);\r
    setprg16(0x8000,reg[8]);\r
    setprg16(0xC000,~0);\r
  }\r
  switch(reg[9]&3)\r
  {\r
    case 0: setmirror(MI_V); break;\r
    case 1: setmirror(MI_H); break;\r
    case 2: setmirror(MI_0); break;\r
    case 3: setmirror(MI_1); break;\r
  }\r
}\r
\r
static DECLFW(BandaiWrite)\r
{\r
  A&=0x0F;\r
  if(A<0x0A)\r
  {\r
    reg[A&0x0F]=V;\r
    BandaiSync();\r
  }\r
  else\r
    switch(A)\r
    {\r
      case 0x0A: X6502_IRQEnd(FCEU_IQEXT); IRQa=V&1; IRQCount=IRQLatch; break;\r
      case 0x0B: IRQLatch&=0xFF00; IRQLatch|=V;  break;\r
      case 0x0C: IRQLatch&=0xFF; IRQLatch|=V<<8; break;\r
      case 0x0D: break;// Serial EEPROM control port\r
    }\r
}\r
\r
DECLFR(BandaiRead)
{
	return 0;
}\r
\r
static void BandaiPower(void)\r
{\r
  BandaiSync();\r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
  SetWriteHandler(0x6000,0xFFFF,BandaiWrite);\r
  SetReadHandler(0x6000,0x7FFF,BandaiRead);\r
}\r
\r
static void M153Power(void)\r
{\r
  BandaiSync();\r
  setprg8r(0x10,0x6000,0);\r
  SetReadHandler(0x6000,0x7FFF,CartBR);\r
  SetWriteHandler(0x6000,0x7FFF,CartBW);\r
  SetReadHandler(0x8000,0xFFFF,CartBR);\r
  SetWriteHandler(0x8000,0xFFFF,BandaiWrite);\r
}\r
\r
\r
static void M153Close(void)\r
{\r
  if(WRAM)\r
    FCEU_gfree(WRAM);\r
  WRAM=NULL;\r
}\r
\r
static void StateRestore(int version)\r
{\r
  BandaiSync();\r
}\r
\r
void Mapper16_Init(CartInfo *info)\r
{\r
  is153=0;\r
  info->Power=BandaiPower;\r
  MapIRQHook=BandaiIRQHook;\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r
\r
void Mapper159_Init(CartInfo *info)\r
{\r
  Mapper16_Init(info);\r
}\r
\r
\r
void Mapper153_Init(CartInfo *info)\r
{\r
  is153=1;\r
  info->Power=M153Power;\r
  info->Close=M153Close;\r
  MapIRQHook=BandaiIRQHook;\r
\r
  WRAMSIZE=8192;\r
  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
  AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
\r
  if(info->battery)\r
  {\r
    info->SaveGame[0]=WRAM;\r
    info->SaveGameLen[0]=WRAMSIZE;\r
  }\r
\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r