merge mapper code from FCEUX

[fceu.git] / boards / 8237.c

/* FCE Ultra - NES/Famicom Emulator\r
 *\r
 * Copyright notice for this file:\r
 *  Copyright (C) 2005-2011 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
 * Super Game (Sugar Softec) protected mapper\r
 * Pocahontas 2 (Unl) [U][!], etc.\r
 * TODO: 9in1 LION KING HANGS!\r
 */\r
\r
#include "mapinc.h"\r
#include "mmc3.h"\r
\r
static uint8 cmdin;\r
\r
static uint8 regperm[8][8] = \r
  {\r
    {0, 1, 2, 3, 4, 5, 6, 7},\r
    {0, 2, 6, 1, 7, 3, 4, 5},\r
    {0, 5, 4, 1, 7, 2, 6, 3}, // unused\r
    {0, 6, 3, 7, 5, 2, 4, 1},\r
    {0, 2, 5, 3, 6, 1, 7, 4},\r
    {0, 1, 2, 3, 4, 5, 6, 7}, // empty\r
    {0, 1, 2, 3, 4, 5, 6, 7}, // empty\r
    {0, 1, 2, 3, 4, 5, 6, 7}, // empty\r
  };\r
\r
static uint8 adrperm[8][8] = \r
  {\r
    {0, 1, 2, 3, 4, 5, 6, 7},\r
    {3, 2, 0, 4, 1, 5, 6, 7},\r
    {0, 1, 2, 3, 4, 5, 6, 7}, // unused\r
    {5, 0, 1, 2, 3, 7, 6, 4},\r
    {3, 1, 0, 5, 2, 4, 6, 7},\r
    {0, 1, 2, 3, 4, 5, 6, 7}, // empty\r
    {0, 1, 2, 3, 4, 5, 6, 7}, // empty\r
    {0, 1, 2, 3, 4, 5, 6, 7}, // empty\r
  };\r
\r
static void UNL8237CW(uint32 A, uint8 V)\r
{\r
  if(EXPREGS[0]&0x40)\r
    setchr1(A,((EXPREGS[1]&0xc)<<6)|(V&0x7F)|((EXPREGS[1]&0x20)<<2));\r
  else\r
    setchr1(A,((EXPREGS[1]&0xc)<<6)|V);\r
}\r
\r
static void UNL8237PW(uint32 A, uint8 V)\r
{\r
  if(EXPREGS[0]&0x40)\r
  {\r
    uint8 sbank = (EXPREGS[1]&0x10);\r
    if(EXPREGS[0]&0x80)\r
    {\r
      uint8 bank = ((EXPREGS[1]&3)<<4)|(EXPREGS[0]&0x7)|(sbank>>1);\r
      if(EXPREGS[0]&0x20)\r
        setprg32(0x8000,bank>>1);\r
      else\r
      {\r
        setprg16(0x8000,bank);\r
        setprg16(0xC000,bank);\r
      }\r
    }\r
    else\r
      setprg8(A,((EXPREGS[1]&3)<<5)|(V&0x0F)|sbank);\r
  }\r
  else\r
  {\r
    if(EXPREGS[0]&0x80)\r
    {\r
      uint8 bank = ((EXPREGS[1]&3)<<4)|(EXPREGS[0]&0xF);\r
      if(EXPREGS[0]&0x20)\r
        setprg32(0x8000,bank>>1);\r
      else\r
      {\r
        setprg16(0x8000,bank);\r
        setprg16(0xC000,bank);\r
      }\r
    }\r
    else\r
      setprg8(A,((EXPREGS[1]&3)<<5)|(V&0x1F));\r
  }\r
}\r
\r
static void UNL8237ACW(uint32 A, uint8 V)\r
{\r
  if(EXPREGS[0]&0x40)\r
    setchr1(A,((EXPREGS[1]&0xE)<<7)|(V&0x7F)|((EXPREGS[1]&0x20)<<2));\r
  else\r
    setchr1(A,((EXPREGS[1]&0xE)<<7)|V);\r
}\r
\r
static void UNL8237APW(uint32 A, uint8 V)\r
{\r
  if(EXPREGS[0]&0x40)\r
  {\r
    uint8 sbank = (EXPREGS[1]&0x10);\r
    if(EXPREGS[0]&0x80)\r
    {\r
      uint8 bank = ((EXPREGS[1]&3)<<4)|((EXPREGS[1]&8)<<3)|(EXPREGS[0]&0x7)|(sbank>>1);\r
      if(EXPREGS[0]&0x20)\r
        setprg32(0x8000,bank>>1);\r
      else\r
      {\r
        setprg16(0x8000,bank);\r
        setprg16(0xC000,bank);\r
      }\r
    }\r
    else\r
      setprg8(A,((EXPREGS[1]&3)<<5)|((EXPREGS[1]&8)<<4)|(V&0x0F)|sbank);\r
  }\r
  else\r
  {\r
    if(EXPREGS[0]&0x80)\r
    {\r
      uint8 bank = ((EXPREGS[1]&3)<<4)|((EXPREGS[1]&8)<<3)|(EXPREGS[0]&0xF);\r
      if(EXPREGS[0]&0x20)\r
        setprg32(0x8000,bank>>1);\r
      else\r
      {\r
        setprg16(0x8000,bank);\r
        setprg16(0xC000,bank);\r
      }\r
    }\r
    else\r
      setprg8(A,((EXPREGS[1]&3)<<5)|((EXPREGS[1]&8)<<4)|(V&0x1F));\r
  }\r
}\r
static DECLFW(UNL8237Write)\r
{\r
  uint8 dat = V;\r
  uint8 adr = adrperm[EXPREGS[2]][((A>>12)&6)|(A&1)];\r
  uint16 addr = (adr & 1)|((adr & 6)<<12)|0x8000;\r
  if(adr < 4)\r
  {\r
    if(!adr)\r
      dat = (dat & 0xC0)|(regperm[EXPREGS[2]][dat & 7]);\r
    MMC3_CMDWrite(addr,dat);\r
  }\r
  else \r
    MMC3_IRQWrite(addr,dat);\r
}\r
\r
static DECLFW(UNL8237ExWrite)\r
{\r
  switch(A)\r
  {\r
    case 0x5000: EXPREGS[0]=V; FixMMC3PRG(MMC3_cmd); break;\r
    case 0x5001: EXPREGS[1]=V; FixMMC3PRG(MMC3_cmd); FixMMC3CHR(MMC3_cmd); break;\r
    case 0x5007: EXPREGS[2]=V; break;\r
  }\r
}\r
\r
static void UNL8237Power(void)\r
{\r
  EXPREGS[0]=EXPREGS[2]=0;\r
  EXPREGS[1]=3;\r
  GenMMC3Power();\r
  SetWriteHandler(0x8000,0xFFFF,UNL8237Write);\r
  SetWriteHandler(0x5000,0x7FFF,UNL8237ExWrite);\r
}\r
\r
void UNL8237_Init(CartInfo *info)\r
{\r
  GenMMC3_Init(info, 256, 256, 0, 0);\r
  cwrap=UNL8237CW;\r
  pwrap=UNL8237PW;\r
  info->Power=UNL8237Power;\r
  AddExState(EXPREGS, 3, 0, "EXPR");\r
  AddExState(&cmdin, 1, 0, "CMDIN");\r
}\r
\r
void UNL8237A_Init(CartInfo *info)\r
{\r
  GenMMC3_Init(info, 256, 256, 0, 0);\r
  cwrap=UNL8237ACW;\r
  pwrap=UNL8237APW;\r
  info->Power=UNL8237Power;\r
  AddExState(EXPREGS, 3, 0, "EXPR");\r
  AddExState(&cmdin, 1, 0, "CMDIN");\r
}\r