merge mapper code from FCEUX

[fceu.git] / boards / fk23c.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
#include "../ines.h"\r
\r
static bool is_BMCFK23CA;\r
static uint8 unromchr;\r
static uint32 dipswitch;\r
static uint8 *CHRRAM=NULL;\r
static uint32 CHRRAMSize;\r
\r
static void BMCFK23CCW(uint32 A, uint8 V)\r
{\r
  if(EXPREGS[0]&0x40)\r
    setchr8(EXPREGS[2]|unromchr);\r
  else if(EXPREGS[0]&0x20) {\r
    setchr1r(0x10, A, V);\r
  }\r
  else\r
  {\r
    uint16 base=(EXPREGS[2]&0x7F)<<3;\r
    if(EXPREGS[3]&2)\r
    {\r
      int cbase=(MMC3_cmd&0x80)<<5;\r
      setchr1(A,V|base);\r
      setchr1(0x0000^cbase,DRegBuf[0]|base);\r
      setchr1(0x0400^cbase,EXPREGS[6]|base);\r
      setchr1(0x0800^cbase,DRegBuf[1]|base);\r
      setchr1(0x0c00^cbase,EXPREGS[7]|base);\r
    }\r
    else\r
      setchr1(A,V|base);\r
  }\r
}\r
\r
//some games are wired differently, and this will need to be changed.\r
//all the WXN games require prg_bonus = 1, and cah4e3's multicarts require prg_bonus = 0\r
//we'll populate this from a game database\r
static int prg_bonus;\r
static int prg_mask;\r
\r
//prg_bonus = 0\r
//4-in-1 (FK23C8021)[p1][!].nes\r
//4-in-1 (FK23C8033)[p1][!].nes\r
//4-in-1 (FK23C8043)[p1][!].nes\r
//4-in-1 (FK23Cxxxx, S-0210A PCB)[p1][!].nes\r
\r
//prg_bonus = 1\r
//[m176]大富翁2-上海大亨.wxn.nes\r
//[m176]宠物翡翠.fix.nes\r
//[m176]格兰帝亚.wxn.nes\r
//[m176]梦幻之星.wxn.nes\r
//[m176]水浒神兽.fix.nes\r
//[m176]西楚霸王.fix.nes\r
//[m176]超级大富翁.wxn.nes\r
//[m176]雄霸天下.wxn.nes\r
\r
//works as-is under virtuanes m176\r
//[m176]三侠五义.wxn.nes\r
//[m176]口袋金.fix.nes\r
//[m176]爆笑三国.fix.nes\r
\r
//needs other tweaks\r
//[m176]三国忠烈传.wxn.nes\r
//[m176]破釜沉舟.fix.nes\r
\r
//PRG wrapper\r
static void BMCFK23CPW(uint32 A, uint8 V)\r
{\r
  uint32 bank = (EXPREGS[1] & 0x1F);\r
  uint32 hiblock = ((EXPREGS[0] & 8) << 4)|((EXPREGS[0] & 0x80) << 1)|(UNIFchrrama?((EXPREGS[2] & 0x40)<<3):0);\r
  uint32 block = (EXPREGS[1] & 0x60) | hiblock;\r
  uint32 extra = (EXPREGS[3] & 2);\r
\r
  if((EXPREGS[0]&7)==4)\r
    setprg32(0x8000,EXPREGS[1]>>1);\r
  else if ((EXPREGS[0]&7)==3)\r
  {\r
    setprg16(0x8000,EXPREGS[1]);\r
    setprg16(0xC000,EXPREGS[1]);\r
  }  \r
  else\r
  { \r
    if(EXPREGS[0]&3)\r
		{\r
			uint32 blocksize = (6)-(EXPREGS[0]&3);\r
			uint32 mask = (1<<blocksize)-1;\r
			V &= mask;\r
			//V &= 63; //? is this a good idea?\r
			V |= (EXPREGS[1]<<1);\r
      setprg8(A,V);\r
		}\r
    else\r
      setprg8(A,V & prg_mask);\r
\r
    if(EXPREGS[3]&2)\r
    {\r
      setprg8(0xC000,EXPREGS[4]);\r
      setprg8(0xE000,EXPREGS[5]);\r
    }\r
  }\r
	setprg8r(0x10,0x6000,A001B&3);\r
}\r
\r
//PRG handler ($8000-$FFFF)\r
static DECLFW(BMCFK23CHiWrite)\r
{\r
	if(EXPREGS[0]&0x40)\r
	{\r
		if(EXPREGS[0]&0x30)\r
			unromchr=0;\r
		else\r
		{\r
			unromchr=V&3;\r
			FixMMC3CHR(MMC3_cmd);\r
		}\r
	}\r
	else\r
	{\r
		if((A==0x8001)&&(EXPREGS[3]&2&&MMC3_cmd&8))\r
		{\r
			EXPREGS[4|(MMC3_cmd&3)]=V;\r
			FixMMC3PRG(MMC3_cmd);\r
			FixMMC3CHR(MMC3_cmd);\r
		}\r
    else\r
      if(A<0xC000) {\r
        if(UNIFchrrama) { // hacky... strange behaviour, must be bit scramble due to pcb layot restrictions\r
                          // check if it not interfer with other dumps\r
          if((A==0x8000)&&(V==0x46))\r
            V=0x47;\r
          else if((A==0x8000)&&(V==0x47))\r
            V=0x46;\r
        }\r
        MMC3_CMDWrite(A,V);\r
        FixMMC3PRG(MMC3_cmd);\r
      }\r
      else\r
        MMC3_IRQWrite(A,V);\r
  }\r
}\r
\r
//EXP handler ($5000-$5FFF)\r
static DECLFW(BMCFK23CWrite)\r
{\r
  if(A&(1<<(dipswitch+4)))\r
  {\r
		//printf("+ ");\r
    EXPREGS[A&3]=V;\r
\r
		bool remap = false;\r
\r
		//sometimes writing to reg0 causes remappings to occur. we think the 2 signifies this. \r
		//if not, 0x24 is a value that is known to work\r
		//however, the low 4 bits are known to control the mapping mode, so 0x20 is more likely to be the immediate remap flag\r
		remap |= ((EXPREGS[0]&0xF0)==0x20); \r
\r
		//this is an actual mapping reg. i think reg0 controls what happens when reg1 is written. anyway, we have to immediately remap these\r
		remap |= (A&3)==1; \r
		//this too.\r
		remap |= (A&3)==2; \r
\r
		if(remap)\r
		{\r
			FixMMC3PRG(MMC3_cmd);\r
			FixMMC3CHR(MMC3_cmd);\r
		}\r
  }\r
\r
	if(is_BMCFK23CA)\r
	{\r
		if(EXPREGS[3]&2)\r
			EXPREGS[0] &= ~7;   // hacky hacky! if someone wants extra banking, then for sure doesn't want mode 4 for it! (allow to run A version boards on normal mapper)\r
	}\r
\r
	//printf("%04X = $%02X\n",A,V);\r
	//printf("%02X %02X %02X %02X\n",EXPREGS[0],EXPREGS[1],EXPREGS[2],EXPREGS[3]);\r
}\r
\r
static void BMCFK23CReset(void)\r
{\r
	//NOT NECESSARY ANYMORE\r
	//this little hack makes sure that we try all the dip switch settings eventually, if we reset enough\r
	// dipswitch++;\r
	// dipswitch&=7;\r
	//printf("BMCFK23C dipswitch set to %d\n",dipswitch);\r
\r
  EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=EXPREGS[3]=0;\r
  EXPREGS[4]=EXPREGS[5]=EXPREGS[6]=EXPREGS[7]=0xFF;\r
  MMC3RegReset();\r
  FixMMC3PRG(MMC3_cmd);\r
  FixMMC3CHR(MMC3_cmd);\r
}\r
\r
static void BMCFK23CPower(void)\r
{\r
	dipswitch = 0;\r
  GenMMC3Power();\r
  EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=EXPREGS[3]=0;\r
  EXPREGS[4]=EXPREGS[5]=EXPREGS[6]=EXPREGS[7]=0xFF;\r
  GenMMC3Power();\r
  SetWriteHandler(0x5000,0x5fff,BMCFK23CWrite);\r
  SetWriteHandler(0x8000,0xFFFF,BMCFK23CHiWrite);\r
  FixMMC3PRG(MMC3_cmd);\r
  FixMMC3CHR(MMC3_cmd);\r
}\r
\r
static void BMCFK23CAPower(void)\r
{\r
  GenMMC3Power();\r
  dipswitch = 0;\r
  EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=EXPREGS[3]=0;\r
  EXPREGS[4]=EXPREGS[5]=EXPREGS[6]=EXPREGS[7]=0xFF;\r
  SetWriteHandler(0x5000,0x5fff,BMCFK23CWrite);\r
  SetWriteHandler(0x8000,0xFFFF,BMCFK23CHiWrite);\r
  FixMMC3PRG(MMC3_cmd);\r
  FixMMC3CHR(MMC3_cmd);\r
}\r
\r
static void BMCFK23CAClose(void)\r
{\r
  if(CHRRAM)\r
    FCEU_gfree(CHRRAM);\r
  CHRRAM=NULL;\r
}\r
\r
void BMCFK23C_Init(CartInfo *info)\r
{\r
	is_BMCFK23CA = false;\r
\r
  GenMMC3_Init(info, 512, 256, 8, 0);\r
  cwrap=BMCFK23CCW;\r
  pwrap=BMCFK23CPW;\r
  info->Power=BMCFK23CPower;\r
  info->Reset=BMCFK23CReset;\r
  AddExState(EXPREGS, 8, 0, "EXPR");\r
  AddExState(&unromchr, 1, 0, "UNCHR");\r
  AddExState(&dipswitch, 1, 0, "DIPSW");\r
\r
	prg_bonus = 1;\r
	if(MasterRomInfoParams.find("bonus") != MasterRomInfoParams.end())\r
		prg_bonus = atoi(MasterRomInfoParams["bonus"].c_str());\r
\r
	prg_mask = 0x7F>>(prg_bonus);\r
}\r
\r
void BMCFK23CA_Init(CartInfo *info)\r
{\r
	is_BMCFK23CA = true;\r
\r
  GenMMC3_Init(info, 512, 256, 8, 0);\r
  cwrap=BMCFK23CCW;\r
  pwrap=BMCFK23CPW;\r
  info->Power=BMCFK23CAPower;\r
  info->Reset=BMCFK23CReset;\r
  info->Close=BMCFK23CAClose;\r
\r
	CHRRAMSize=8192;\r
  CHRRAM=(uint8*)FCEU_gmalloc(CHRRAMSize);\r
  SetupCartCHRMapping(0x10, CHRRAM, CHRRAMSize, 1);\r
  AddExState(CHRRAM, CHRRAMSize, 0, "CRAM");\r
\r
  AddExState(EXPREGS, 8, 0, "EXPR");\r
  AddExState(&unromchr, 1, 0, "UNCHR");\r
  AddExState(&dipswitch, 1, 0, "DIPSW");\r
\r
	prg_bonus = 1;\r
	if(MasterRomInfoParams.find("bonus") != MasterRomInfoParams.end())\r
		prg_bonus = atoi(MasterRomInfoParams["bonus"].c_str());\r
	prg_mask = 0x7F>>(prg_bonus);\r
}\r