merge mappers from FCEU-mm

[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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA\r
 */\r
\r
#include "mapinc.h"\r
#include "mmc3.h"\r
\r
static uint8 unromchr;\r
static uint32 dipswitch = 0;\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
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
  switch(EXPREGS[0]&7)\r
  {\r
   case 0: setprg8(A, (block << 1) | (V & 0x3F));\r
           if(extra)\r
           {\r
            setprg8(0xC000,EXPREGS[4]);\r
            setprg8(0xE000,EXPREGS[5]);\r
           }\r
           break;\r
   case 1: setprg8(A, ((hiblock | (EXPREGS[1] & 0x70)) << 1) | (V & 0x1F));\r
           if(extra)\r
           {\r
            setprg8(0xC000,EXPREGS[4]);\r
            setprg8(0xE000,EXPREGS[5]);\r
           }\r
           break;\r
   case 2: setprg8(A, ((hiblock | (EXPREGS[1] & 0x78)) << 1) | (V & 0x0F));\r
           if(extra)\r
           {\r
            setprg8(0xC000,EXPREGS[4]);\r
            setprg8(0xE000,EXPREGS[5]);\r
           }\r
           break;\r
   case 3: setprg16(0x8000,(bank | block));\r
           setprg16(0xC000,(bank | block));\r
           break;\r
   case 4: setprg32(0x8000,(bank | block) >> 1);\r
           break;\r
  }\r
  setprg8r(0x10,0x6000,A001B&3);\r
}\r
\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
static DECLFW(BMCFK23CWrite)\r
{\r
  //FCEU_printf("lo %04x:%02x\n",A,V);\r