merge mappers from FCEU-mm

[fceu.git] / boards / bmc70in1.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2005 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
\r
#include "mapinc.h"\r
\r
static uint8 is_large_banks, hw_switch;\r
static uint8 large_bank;\r
static uint8 prg_bank;\r
static uint8 chr_bank;\r
static uint8 bank_mode;\r
static uint8 mirroring;\r
static SFORMAT StateRegs[]=\r
{\r
  {&large_bank, 1, "LB"},\r
  {&hw_switch, 1, "DPSW"},\r
  {&prg_bank, 1, "PRG"},\r
  {&chr_bank, 1, "CHR"},\r
  {&bank_mode, 1, "BM"},\r
  {&mirroring, 1, "MIRR"},\r
  {0}\r
};\r
\r
static void Sync(void)\r
{\r
  switch (bank_mode)\r
  {\r
    case 0x00:\r
    case 0x10: setprg16(0x8000,large_bank|prg_bank);\r
               setprg16(0xC000,large_bank|7);\r
               break;\r
    case 0x20: setprg32(0x8000,(large_bank|prg_bank)>>1);\r
               break;\r
    case 0x30: setprg16(0x8000,large_bank|prg_bank);\r
               setprg16(0xC000,large_bank|prg_bank);\r
               break;\r
  }\r
  setmirror(mirroring);\r
  if(!is_large_banks)\r
    setchr8(chr_bank);\r
}\r
\r
static DECLFR(BMC70in1Read)\r
{\r
  if(bank_mode==0x10)\r
//    if(is_large_banks)\r
      return CartBR((A&0xFFF0)|hw_switch);\r
//    else\r
//      return CartBR((A&0xFFF0)|hw_switch);\r
  else\r
    return CartBR(A);\r
}\r
\r
static DECLFW(BMC70in1Write)\r
{\r
  if(A&0x4000)\r
  {\r
    bank_mode=A&0x30;\r
    prg_bank=A&7;\r
  }\r
  else\r
  {\r
    mirroring=((A&0x20)>>5)^1;\r
    if(is_large_banks)\r
      large_bank=(A&3)<<3;\r
    else\r
      chr_bank=A&7;\r
  }\r
  Sync();\r
}\r
\r
static void BMC70in1Reset(void)\r
{\r
  bank_mode=0;\r
  large_bank=0;\r
  Sync();\r
  hw_switch++;\r
  hw_switch&=0xf;\r
}\r
\r
static void BMC70in1Power(void)\r
{\r
  setchr8(0);\r
  bank_mode=0;\r
  large_bank=0;\r
  Sync();\r
  SetReadHandler(0x8000,0xFFFF,BMC70in1Read);\r
  SetWriteHandler(0x8000,0xffff,BMC70in1Write);\r
}\r
\r
static void StateRestore(int version)\r
{\r
  Sync();\r
}\r
\r
void BMC70in1_Init(CartInfo *info)\r
{\r
  is_large_banks=0;\r
  hw_switch=0xd;\r
  info->Power=BMC70in1Power;\r
  info->Reset=BMC70in1Reset;\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r
\r
void BMC70in1B_Init(CartInfo *info)\r
{\r
  is_large_banks=1;\r
  hw_switch=0x6;\r
  info->Power=BMC70in1Power;\r
  info->Reset=BMC70in1Reset;\r
  GameStateRestore=StateRestore;\r
  AddExState(&StateRegs, ~0, 0, 0);\r
}\r