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mmc5.cpp

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2002 Xodnizel
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/* None of this code should use any of the iNES bank switching wrappers. */

#include "mapinc.h"

static void (*sfun)(int P);
static void (*psfun)(void);

void MMC5RunSound(int Count);
void MMC5RunSoundHQ(void);

static INLINE void MMC5SPRVROM_BANK1(uint32 A,uint32 V)
{
  if(CHRptr[0])
  {
    V&=CHRmask1[0];
    MMC5SPRVPage[(A)>>10]=&CHRptr[0][(V)<<10]-(A);
  }
}

static INLINE void MMC5BGVROM_BANK1(uint32 A,uint32 V) {if(CHRptr[0]){V&=CHRmask1[0];MMC5BGVPage[(A)>>10]=&CHRptr[0][(V)<<10]-(A);}}

static INLINE void MMC5SPRVROM_BANK2(uint32 A,uint32 V) {if(CHRptr[0]){V&=CHRmask2[0];MMC5SPRVPage[(A)>>10]=MMC5SPRVPage[((A)>>10)+1]=&CHRptr[0][(V)<<11]-(A);}}
static INLINE void MMC5BGVROM_BANK2(uint32 A,uint32 V) {if(CHRptr[0]){V&=CHRmask2[0];MMC5BGVPage[(A)>>10]=MMC5BGVPage[((A)>>10)+1]=&CHRptr[0][(V)<<11]-(A);}}

static INLINE void MMC5SPRVROM_BANK4(uint32 A,uint32 V) {if(CHRptr[0]){V&=CHRmask4[0];MMC5SPRVPage[(A)>>10]=MMC5SPRVPage[((A)>>10)+1]= MMC5SPRVPage[((A)>>10)+2]=MMC5SPRVPage[((A)>>10)+3]=&CHRptr[0][(V)<<12]-(A);}}
static INLINE void MMC5BGVROM_BANK4(uint32 A,uint32 V) {if(CHRptr[0]){V&=CHRmask4[0];MMC5BGVPage[(A)>>10]=MMC5BGVPage[((A)>>10)+1]=MMC5BGVPage[((A)>>10)+2]=MMC5BGVPage[((A)>>10)+3]=&CHRptr[0][(V)<<12]-(A);}}

static INLINE void MMC5SPRVROM_BANK8(uint32 V) {if(CHRptr[0]){V&=CHRmask8[0];MMC5SPRVPage[0]=MMC5SPRVPage[1]=MMC5SPRVPage[2]=MMC5SPRVPage[3]=MMC5SPRVPage[4]=MMC5SPRVPage[5]=MMC5SPRVPage[6]=MMC5SPRVPage[7]=&CHRptr[0][(V)<<13];}}
static INLINE void MMC5BGVROM_BANK8(uint32 V) {if(CHRptr[0]){V&=CHRmask8[0];MMC5BGVPage[0]=MMC5BGVPage[1]=MMC5BGVPage[2]=MMC5BGVPage[3]=MMC5BGVPage[4]=MMC5BGVPage[5]=MMC5BGVPage[6]=MMC5BGVPage[7]=&CHRptr[0][(V)<<13];}}

static uint8 PRGBanks[4];
static uint8 WRAMPage;
static uint16 CHRBanksA[8], CHRBanksB[4];
static uint8 WRAMMaskEnable[2];
uint8 mmc5ABMode;                /* A=0, B=1 */

static uint8 IRQScanline,IRQEnable;
static uint8 CHRMode, NTAMirroring, NTFill, ATFill;

static uint8 MMC5IRQR;
static uint8 MMC5LineCounter;
static uint8 mmc5psize, mmc5vsize;
static uint8 mul[2];

static uint8 *WRAM=NULL;
static uint8 *MMC5fill=NULL;
static uint8 *ExRAM=NULL;

static uint8 MMC5WRAMsize;
static uint8 MMC5WRAMIndex[8];

static uint8 MMC5ROMWrProtect[4];
static uint8 MMC5MemIn[5];

static void MMC5CHRA(void);
static void MMC5CHRB(void);

typedef struct __cartdata {
  uint32 crc32;
  uint8 size;
} cartdata;

#define Sprite16  (PPU[0]&0x20)   //Sprites 8x16/8x8 
//#define MMC5SPRVRAMADR(V)      &MMC5SPRVPage[(V)>>10][(V)]
static inline uint8 *  MMC5BGVRAMADR(uint32 A)
{
      if(!Sprite16) {
            if(mmc5ABMode==0)
                  return &MMC5SPRVPage[(A)>>10][(A)];
            else 
                  return &MMC5BGVPage[(A)>>10][(A)];
      } else return &MMC5BGVPage[(A)>>10][(A)];
}

static void mmc5_PPUWrite(uint32 A, uint8 V) {
      uint32 tmp = A;
      extern uint8 PALRAM[0x20];

      if(tmp>=0x3F00)
            {
                  // hmmm....
                  if(!(tmp&0xf))
                        PALRAM[0x00]=PALRAM[0x04]=PALRAM[0x08]=PALRAM[0x0C]=V&0x3F;
                  else if(tmp&3) PALRAM[(tmp&0x1f)]=V&0x3f;
            }
            else if(tmp<0x2000)
            {
                  if(PPUCHRRAM&(1<<(tmp>>10)))
                        VPage[tmp>>10][tmp]=V;
            }   
            else
            {
                  if(PPUNTARAM&(1<<((tmp&0xF00)>>10)))
                        vnapage[((tmp&0xF00)>>10)][tmp&0x3FF]=V;
            }
}

uint8 FASTCALL mmc5_PPURead(uint32 A) {
      if(A<0x2000)
      {
            if(ppuphase == PPUPHASE_BG)
                  return *MMC5BGVRAMADR(A);
            else return MMC5SPRVPage[(A)>>10][(A)];
      }
      else
      {   
            return vnapage[(A>>10)&0x3][A&0x3FF];
      }
}



// ELROM seems to have 8KB of RAM
// ETROM seems to have 16KB of WRAM
// EWROM seems to have 32KB of WRAM

cartdata MMC5CartList[]=
{
  {0x9c18762b,2},         /* L'Empereur */
  {0x26533405,2},
  {0x6396b988,2},
  {0xaca15643,2},        /* Uncharted Waters */
  {0xfe3488d1,2},        /* Dai Koukai Jidai */
  {0x15fe6d0f,2},        /* BKAC             */
  {0x39f2ce4b,2},        /* Suikoden              */
  {0x8ce478db,2},        /* Nobunaga's Ambition 2 */
  {0xeee9a682,2},
  {0xf9b4240f,2},
  {0x1ced086f,2},        /* Ishin no Arashi */
  {0xf540677b,4},        /* Nobunaga...Bushou Fuuun Roku */
  {0x6f4e4312,4},        /* Aoki Ookami..Genchou */
  {0xf011e490,4},        /* Romance of the 3 Kingdoms 2 */
  {0x184c2124,4},        /* Sangokushi 2 */
  {0xee8e6553,4},
};

#define MMC5_NOCARTS          (sizeof(MMC5CartList)/sizeof(MMC5CartList[0]))
int DetectMMC5WRAMSize(uint32 crc32)
{
      int x;
      for(x=0;x<MMC5_NOCARTS;x++) {
            if(crc32==MMC5CartList[x].crc32) {
                  FCEU_printf(" >8KB external WRAM present.  Use UNIF if you hack the ROM image.\n");
                  return(MMC5CartList[x].size*8);
            }
      }

      //mbg 04-aug-08 - previously, this was returning 8KB
      //but I changed it to return 64 because unlisted carts are probably homebrews, and they should probably use 64 (why not use it all?)
      //ch4 10-dec-08 - then f***ng for what all this shit above? let's give em all this 64k shit! Damn
      //               homebrew must use it's own emulators or standart features.
      //adelikat 20-dec-08 - reverting back to return 64, sounds like it was changed back to 8 simply on principle.  FCEUX is all encompassing, and that include
      //rom-hacking.  We want it to be the best emulator for such purposes.  So unless return 64 harms compatibility with anything else, I see now reason not to have it
      //mbg 29-mar-09 - I should note that mmc5 is in principle capable of 64KB, even if no real carts ever supported it.
      //This does not in principle break any games which share this mapper, and it should be OK for homebrew.
      //if there are games which need 8KB instead of 64KB default then lets add them to the list
      return 64;
}

static void BuildWRAMSizeTable(void)
{
      int x;
      for(x=0;x<8;x++)
      {
            switch(MMC5WRAMsize)
            {
            case 0: MMC5WRAMIndex[x]=255; break; //X,X,X,X,X,X,X,X
            case 1: MMC5WRAMIndex[x]=(x>3)?255:0; break; //0,0,0,0,X,X,X,X
            case 2: MMC5WRAMIndex[x]=(x&4)>>2; break; //0,0,0,0,1,1,1,1
            case 4: MMC5WRAMIndex[x]=(x>3)?255:(x&3); break; //0,1,2,3,X,X,X,X
            case 8: MMC5WRAMIndex[x]=x; break; //0,1,2,3,4,5,6,7,8  
                  //mbg 8/6/08 - i added this to support 64KB of wram
                  //now, I have at least one example (laser invasion) which actually uses size 1 but isnt in the crc list
                  //so, whereas before my change on 8/4/08 we would have selected size 1, now we select size 8
                  //this means that we could have just introduced an emulation bug, in case those games happened to 
                  //address, say, page 3. with size 1 that would resolve to [0] but in size 8 it resolves to [3].
                  //so, you know what to do if there are problems.
            }
      }
}

static void MMC5CHRA(void)
{
  int x;
  switch(mmc5vsize&3)
  {
    case 0: setchr8(CHRBanksA[7]);
            MMC5SPRVROM_BANK8(CHRBanksA[7]);
            break;
    case 1: setchr4(0x0000,CHRBanksA[3]);
            setchr4(0x1000,CHRBanksA[7]);
            MMC5SPRVROM_BANK4(0x0000,CHRBanksA[3]);
            MMC5SPRVROM_BANK4(0x1000,CHRBanksA[7]);
            break;
    case 2: setchr2(0x0000,CHRBanksA[1]);
            setchr2(0x0800,CHRBanksA[3]);
            setchr2(0x1000,CHRBanksA[5]);
            setchr2(0x1800,CHRBanksA[7]);
            MMC5SPRVROM_BANK2(0x0000,CHRBanksA[1]);
            MMC5SPRVROM_BANK2(0x0800,CHRBanksA[3]);
            MMC5SPRVROM_BANK2(0x1000,CHRBanksA[5]);
            MMC5SPRVROM_BANK2(0x1800,CHRBanksA[7]);
            break;
    case 3: for(x=0;x<8;x++)
            {
              setchr1(x<<10,CHRBanksA[x]);
              MMC5SPRVROM_BANK1(x<<10,CHRBanksA[x]);
            }
            break;
  }
}

static void MMC5CHRB(void)
{
  int x;
  switch(mmc5vsize&3)
  {
    case 0: setchr8(CHRBanksB[3]);
            MMC5BGVROM_BANK8(CHRBanksB[3]);
            break;
    case 1: setchr4(0x0000,CHRBanksB[3]);
            setchr4(0x1000,CHRBanksB[3]);
            MMC5BGVROM_BANK4(0x0000,CHRBanksB[3]);
            MMC5BGVROM_BANK4(0x1000,CHRBanksB[3]);
            break;
    case 2: setchr2(0x0000,CHRBanksB[1]);
            setchr2(0x0800,CHRBanksB[3]);
            setchr2(0x1000,CHRBanksB[1]);
            setchr2(0x1800,CHRBanksB[3]);
            MMC5BGVROM_BANK2(0x0000,CHRBanksB[1]);
            MMC5BGVROM_BANK2(0x0800,CHRBanksB[3]);
            MMC5BGVROM_BANK2(0x1000,CHRBanksB[1]);
            MMC5BGVROM_BANK2(0x1800,CHRBanksB[3]);
            break;
    case 3: for(x=0;x<8;x++)
            {
              setchr1(x<<10,CHRBanksB[x&3]);
              MMC5BGVROM_BANK1(x<<10,CHRBanksB[x&3]);
            }
            break;
  }
}

static void MMC5WRAM(uint32 A, uint32 V)
{
  //printf("%02x\n",V);
  V=MMC5WRAMIndex[V&7];
  if(V!=255)
  {
    setprg8r(0x10,A,V);
    MMC5MemIn[(A-0x6000)>>13]=1;
  }
  else
    MMC5MemIn[(A-0x6000)>>13]=0;
}

static void MMC5PRG(void)
{
  int x;
  switch(mmc5psize&3)
  {
    case 0: MMC5ROMWrProtect[0]=MMC5ROMWrProtect[1]=
            MMC5ROMWrProtect[2]=MMC5ROMWrProtect[3]=1;
            setprg32(0x8000,((PRGBanks[1]&0x7F)>>2));
            for(x=0;x<4;x++)
               MMC5MemIn[1+x]=1;
            break;
    case 1: if(PRGBanks[1]&0x80)
            {
              MMC5ROMWrProtect[0]=MMC5ROMWrProtect[1]=1;
              setprg16(0x8000,(PRGBanks[1]>>1));
              MMC5MemIn[1]=MMC5MemIn[2]=1;
            }
            else
            {
              MMC5ROMWrProtect[0]=MMC5ROMWrProtect[1]=0;
              MMC5WRAM(0x8000,PRGBanks[1]&7&0xFE);
              MMC5WRAM(0xA000,(PRGBanks[1]&7&0xFE)+1);
            }
            MMC5MemIn[3]=MMC5MemIn[4]=1;
            MMC5ROMWrProtect[2]=MMC5ROMWrProtect[3]=1;
            setprg16(0xC000,(PRGBanks[3]&0x7F)>>1);
            break;
    case 2: if(PRGBanks[1]&0x80)
            {
              MMC5MemIn[1]=MMC5MemIn[2]=1;
              MMC5ROMWrProtect[0]=MMC5ROMWrProtect[1]=1;
              setprg16(0x8000,(PRGBanks[1]&0x7F)>>1);
            }
            else
            {
              MMC5ROMWrProtect[0]=MMC5ROMWrProtect[1]=0;
              MMC5WRAM(0x8000,PRGBanks[1]&7&0xFE);
              MMC5WRAM(0xA000,(PRGBanks[1]&7&0xFE)+1);
            }
            if(PRGBanks[2]&0x80)
            {
              MMC5ROMWrProtect[2]=1;
              MMC5MemIn[3]=1;
              setprg8(0xC000,PRGBanks[2]&0x7F);
            }
            else
            {
              MMC5ROMWrProtect[2]=0;
              MMC5WRAM(0xC000,PRGBanks[2]&7);
            }
            MMC5MemIn[4]=1;
            MMC5ROMWrProtect[3]=1;
            setprg8(0xE000,PRGBanks[3]&0x7F);
            break;
    case 3: for(x=0;x<3;x++)
            if(PRGBanks[x]&0x80)
            {
              MMC5ROMWrProtect[x]=1;
              setprg8(0x8000+(x<<13),PRGBanks[x]&0x7F);
              MMC5MemIn[1+x]=1;
            }
            else
            {
              MMC5ROMWrProtect[x]=0;
              MMC5WRAM(0x8000+(x<<13),PRGBanks[x]&7);
            }
            MMC5MemIn[4]=1;
            MMC5ROMWrProtect[3]=1;
            setprg8(0xE000,PRGBanks[3]&0x7F);
            break;
  }
}

static DECLFW(Mapper5_write)
{
  if(A>=0x5120&&A<=0x5127)
  {
    mmc5ABMode = 0;
    CHRBanksA[A&7]=V | ((MMC50x5130&0x3)<<8); //if we had a test case for this then we could test this, but it hasnt been verified
      //CHRBanksA[A&7]=V;
    MMC5CHRA();
  }
  else switch(A)
  {
    case 0x5105: {
                   int x;
                   for(x=0;x<4;x++)
                   {
                     switch((V>>(x<<1))&3)
                     {
                       case 0:
                                       PPUNTARAM|=1<<x;vnapage[x]=NTARAM;break;
                       case 1:
                                       PPUNTARAM|=1<<x;vnapage[x]=NTARAM+0x400;break;
                       case 2:
                                       PPUNTARAM|=1<<x;vnapage[x]=ExRAM;break;
                       case 3:
                                       PPUNTARAM&=~(1<<x);vnapage[x]=MMC5fill;break;
                     }
                   }
                 }
                 NTAMirroring=V;
                 break;
    case 0x5113: WRAMPage=V;MMC5WRAM(0x6000,V&7);break;
    case 0x5100: mmc5psize=V;MMC5PRG();break;
    case 0x5101: mmc5vsize=V;
                 if(!mmc5ABMode)
                 { MMC5CHRB();MMC5CHRA();}
                 else
                 { MMC5CHRA();MMC5CHRB();}
                 break;
    case 0x5114:
    case 0x5115:
    case 0x5116:
    case 0x5117: PRGBanks[A&3]=V;MMC5PRG();break;
    case 0x5128:
    case 0x5129:
    case 0x512a:
    case 0x512b: mmc5ABMode=1;
                 CHRBanksB[A&3]=V;
                 MMC5CHRB();
                 break;
    case 0x5102: WRAMMaskEnable[0]=V;break;
    case 0x5103: WRAMMaskEnable[1]=V;break;
    case 0x5104: CHRMode=V;MMC5HackCHRMode=V&3;break;
    case 0x5106: if(V!=NTFill)
                 {
                   uint32 t;
                   t=V|(V<<8)|(V<<16)|(V<<24);
                   FCEU_dwmemset(MMC5fill,t,0x3c0);
                 }
                 NTFill=V;
                 break;
    case 0x5107: if(V!=ATFill)
                 {
                   unsigned char moop;
                   uint32 t;
                   moop=V|(V<<2)|(V<<4)|(V<<6);
                   t=moop|(moop<<8)|(moop<<16)|(moop<<24);
                   FCEU_dwmemset(MMC5fill+0x3c0,t,0x40);
                 }
                 ATFill=V;
                 break;
    case 0x5130: MMC50x5130=V;break;

    case 0x5200: MMC5HackSPMode=V;break;
    case 0x5201: MMC5HackSPScroll=(V>>3)&0x1F;break;
    case 0x5202: MMC5HackSPPage=V&0x3F;break;
    case 0x5203: X6502_IRQEnd(FCEU_IQEXT);IRQScanline=V;break;
    case 0x5204: X6502_IRQEnd(FCEU_IQEXT);IRQEnable=V&0x80;break;
    case 0x5205: mul[0]=V;break;
    case 0x5206: mul[1]=V;break;
  }
}

static DECLFR(MMC5_ReadROMRAM)
{
  if(MMC5MemIn[(A-0x6000)>>13])
    return Page[A>>11][A];
  else
    return X.DB;
}

static DECLFW(MMC5_WriteROMRAM)
{
  if(A>=0x8000)
    if(MMC5ROMWrProtect[(A-0x8000)>>13]) return;
  if(MMC5MemIn[(A-0x6000)>>13])
    if(((WRAMMaskEnable[0]&3)|((WRAMMaskEnable[1]&3)<<2)) == 6) 
            Page[A>>11][A]=V;
}

static DECLFW(MMC5_ExRAMWr)
{
  if(MMC5HackCHRMode!=3)
    ExRAM[A&0x3ff]=V;
}

static DECLFR(MMC5_ExRAMRd)
{
 /* Not sure if this is correct, so I'll comment it out for now. */
 //if(MMC5HackCHRMode>=2)
  return ExRAM[A&0x3ff];
 //else
 // return(X.DB);
}

static DECLFR(MMC5_read)
{
  switch(A)
  {
    case 0x5204: X6502_IRQEnd(FCEU_IQEXT);
                 {
                   uint8 x;
                   x=MMC5IRQR;
                   if(!fceuindbg)
                     MMC5IRQR&=0x40;
                   return x;
                 }
    case 0x5205: return (mul[0]*mul[1]);
    case 0x5206: return ((mul[0]*mul[1])>>8);
  }
  return(X.DB);
}

void MMC5Synco(void)
{
  int x;

  MMC5PRG();
  for(x=0;x<4;x++)
  {
    switch((NTAMirroring>>(x<<1))&3)
    {
      case 0:PPUNTARAM|=1<<x;vnapage[x]=NTARAM;break;
      case 1:PPUNTARAM|=1<<x;vnapage[x]=NTARAM+0x400;break;
      case 2:PPUNTARAM|=1<<x;vnapage[x]=ExRAM;break;
      case 3:PPUNTARAM&=~(1<<x);vnapage[x]=MMC5fill;break;
    }
  }
  MMC5WRAM(0x6000,WRAMPage&7);
  if(!mmc5ABMode)
  {
    MMC5CHRB();
    MMC5CHRA();
  }
  else
  {
    MMC5CHRA();
    MMC5CHRB();
  }
  {
    uint32 t;
    t=NTFill|(NTFill<<8)|(NTFill<<16)|(NTFill<<24);
    FCEU_dwmemset(MMC5fill,t,0x3c0);
  }
  {
    unsigned char moop;
    uint32 t;
    moop=ATFill|(ATFill<<2)|(ATFill<<4)|(ATFill<<6);
    t=moop|(moop<<8)|(moop<<16)|(moop<<24);
    FCEU_dwmemset(MMC5fill+0x3c0,t,0x40);
  }
  X6502_IRQEnd(FCEU_IQEXT);
  MMC5HackCHRMode=CHRMode&3;
}

void MMC5_hb(int scanline)
{
  if(scanline==240)
  {
    MMC5LineCounter=0;
    MMC5IRQR=0x40;
    return;
  }
  if(MMC5LineCounter<240)
  {
    if(MMC5LineCounter==IRQScanline)
    {
      MMC5IRQR|=0x80;
      if(IRQEnable&0x80)
        X6502_IRQBegin(FCEU_IQEXT);
    }
    MMC5LineCounter++;
  }
  if(MMC5LineCounter==240)
    MMC5IRQR=0;
}

void MMC5_StateRestore(int version)
{
  MMC5Synco();
}

typedef struct {
  uint16 wl[2];
  uint8 env[2];
  uint8 enable;
  uint8 running;
  uint8 raw;
  uint8 rawcontrol;
  int32 dcount[2];
  int32 BC[3];
  int32 vcount[2];
} MMC5APU;

static MMC5APU MMC5Sound;


static void Do5PCM()
{
  int32 V;
  int32 start,end;

  start=MMC5Sound.BC[2];
  end=(SOUNDTS<<16)/soundtsinc;
  if(end<=start) return;
  MMC5Sound.BC[2]=end;

  if(!(MMC5Sound.rawcontrol&0x40) && MMC5Sound.raw)
    for(V=start;V<end;V++)
       Wave[V>>4]+=MMC5Sound.raw<<1;
}

static void Do5PCMHQ()
{
  uint32 V; //mbg merge 7/17/06 made uint32
  if(!(MMC5Sound.rawcontrol&0x40) && MMC5Sound.raw)
    for(V=MMC5Sound.BC[2];V<SOUNDTS;V++)
       WaveHi[V]+=MMC5Sound.raw<<5;
  MMC5Sound.BC[2]=SOUNDTS;
}


static DECLFW(Mapper5_SW)
{
  A&=0x1F;

  GameExpSound.Fill=MMC5RunSound;
  GameExpSound.HiFill=MMC5RunSoundHQ;

  switch(A)
  {
    case 0x10:if(psfun) psfun();MMC5Sound.rawcontrol=V;break;
    case 0x11:if(psfun) psfun();MMC5Sound.raw=V;break;

    case 0x0:
    case 0x4://printf("%04x:$%02x\n",A,V&0x30);
              if(sfun) sfun(A>>2);
              MMC5Sound.env[A>>2]=V;
              break;
    case 0x2:
    case 0x6: if(sfun) sfun(A>>2);
              MMC5Sound.wl[A>>2]&=~0x00FF;
              MMC5Sound.wl[A>>2]|=V&0xFF;
              break;
    case 0x3:
    case 0x7://printf("%04x:$%02x\n",A,V>>3);
           MMC5Sound.wl[A>>2]&=~0x0700;
           MMC5Sound.wl[A>>2]|=(V&0x07)<<8;
           MMC5Sound.running|=1<<(A>>2);
           break;
  case 0x15:if(sfun)
            {
             sfun(0);
             sfun(1);
            }
            MMC5Sound.running&=V;
            MMC5Sound.enable=V;
                //printf("%02x\n",V);
            break;
 }
}

static void Do5SQ(int P)
{
 static int tal[4]={1,2,4,6};
 int32 V,amp,rthresh,wl;
 int32 start,end;

 start=MMC5Sound.BC[P];
 end=(SOUNDTS<<16)/soundtsinc;
 if(end<=start) return;
 MMC5Sound.BC[P]=end;

 wl=MMC5Sound.wl[P]+1;
 amp=(MMC5Sound.env[P]&0xF)<<4;
 rthresh=tal[(MMC5Sound.env[P]&0xC0)>>6];

 if(wl>=8 && (MMC5Sound.running&(P+1)))
 {
  int dc,vc;

  wl<<=18;
  dc=MMC5Sound.dcount[P];
  vc=MMC5Sound.vcount[P];

  for(V=start;V<end;V++)
  {
    if(dc<rthresh)
     Wave[V>>4]+=amp;
    vc-=nesincsize;
    while(vc<=0)
    {
     vc+=wl;
     dc=(dc+1)&7;
    }
  }
  MMC5Sound.dcount[P]=dc;
  MMC5Sound.vcount[P]=vc;
 }
}

static void Do5SQHQ(int P)
{
 static int tal[4]={1,2,4,6};
 uint32 V; //mbg merge 7/17/06 made uint32
 int32 amp,rthresh,wl;

 wl=MMC5Sound.wl[P]+1;
 amp=((MMC5Sound.env[P]&0xF)<<8);
 rthresh=tal[(MMC5Sound.env[P]&0xC0)>>6];

 if(wl>=8 && (MMC5Sound.running&(P+1)))
 {
  int dc,vc;

  wl<<=1;

  dc=MMC5Sound.dcount[P];
  vc=MMC5Sound.vcount[P];
  for(V=MMC5Sound.BC[P];V<SOUNDTS;V++)
  {
    if(dc<rthresh)
     WaveHi[V]+=amp;
    vc--;
    if(vc<=0)   /* Less than zero when first started. */
    {
     vc=wl;
     dc=(dc+1)&7;
    }
  }
  MMC5Sound.dcount[P]=dc;
  MMC5Sound.vcount[P]=vc;
 }
 MMC5Sound.BC[P]=SOUNDTS;
}

void MMC5RunSoundHQ(void)
{
  Do5SQHQ(0);
  Do5SQHQ(1);
  Do5PCMHQ();
}

void MMC5HiSync(int32 ts)
{
 int x;
 for(x=0;x<3;x++) MMC5Sound.BC[x]=ts;
}

void MMC5RunSound(int Count)
{
  int x;
  Do5SQ(0);
  Do5SQ(1);
  Do5PCM();
  for(x=0;x<3;x++)
   MMC5Sound.BC[x]=Count;
}

void Mapper5_ESI(void)
{
 GameExpSound.RChange=Mapper5_ESI;
 if(FSettings.SndRate)
 {
  if(FSettings.soundq>=1)
  {
   sfun=Do5SQHQ;
   psfun=Do5PCMHQ;
  }
  else
  {
   sfun=Do5SQ;
   psfun=Do5PCM;
  }
 }
 else
 {
  sfun=0;
  psfun=0;
 }
 memset(MMC5Sound.BC,0,sizeof(MMC5Sound.BC));
 memset(MMC5Sound.vcount,0,sizeof(MMC5Sound.vcount));
 GameExpSound.HiSync=MMC5HiSync;
}

void NSFMMC5_Init(void)
{
  memset(&MMC5Sound,0,sizeof(MMC5Sound));
  mul[0]=mul[1]=0;
  ExRAM=(uint8*)FCEU_gmalloc(1024);
  Mapper5_ESI();
  SetWriteHandler(0x5c00,0x5fef,MMC5_ExRAMWr);
  SetReadHandler(0x5c00,0x5fef,MMC5_ExRAMRd);
  MMC5HackCHRMode=2;
  SetWriteHandler(0x5000,0x5015,Mapper5_SW);
  SetWriteHandler(0x5205,0x5206,Mapper5_write);
  SetReadHandler(0x5205,0x5206,MMC5_read);
}

void NSFMMC5_Close(void)
{
 FCEU_gfree(ExRAM);
 ExRAM=0;
}

static void GenMMC5Reset(void)
{
 int x;

 for(x=0;x<4;x++) PRGBanks[x]=~0;
 for(x=0;x<8;x++) CHRBanksA[x]=~0;
 for(x=0;x<4;x++) CHRBanksB[x]=~0;
 WRAMMaskEnable[0]=WRAMMaskEnable[1]=~0;

 mmc5psize=mmc5vsize=3;
 CHRMode=0;

 NTAMirroring=NTFill=ATFill=0xFF;

 MMC5Synco();

 SetWriteHandler(0x4020,0x5bff,Mapper5_write);
 SetReadHandler(0x4020,0x5bff,MMC5_read);

 SetWriteHandler(0x5c00,0x5fff,MMC5_ExRAMWr);
 SetReadHandler(0x5c00,0x5fff,MMC5_ExRAMRd);

 SetWriteHandler(0x6000,0xFFFF,MMC5_WriteROMRAM);
 SetReadHandler(0x6000,0xFFFF,MMC5_ReadROMRAM);

 SetWriteHandler(0x5000,0x5015,Mapper5_SW);
 SetWriteHandler(0x5205,0x5206,Mapper5_write);
 SetReadHandler(0x5205,0x5206,MMC5_read);

 //GameHBIRQHook=MMC5_hb;
 FCEU_CheatAddRAM(8,0x6000,WRAM);
 FCEU_CheatAddRAM(1,0x5c00,ExRAM);
}

static SFORMAT MMC5_StateRegs[]={
        { PRGBanks, 4, "PRGB"},
        { CHRBanksA, 16, "CHRA"},
        { CHRBanksB, 8, "CHRB"},
        { &WRAMPage, 1, "WRMP"},
        { WRAMMaskEnable, 2, "WRME"},
        { &mmc5ABMode, 1, "ABMD"},
        { &IRQScanline, 1, "IRQS"},
        { &IRQEnable, 1, "IRQE"},
        { &CHRMode, 1, "CHRM"},
        { &NTAMirroring, 1, "NTAM"},
        { &NTFill, 1, "NTFL"},
        { &ATFill, 1, "ATFL"},

        { &MMC5Sound.wl[0], 2|FCEUSTATE_RLSB, "SDW0"},
        { &MMC5Sound.wl[1], 2|FCEUSTATE_RLSB, "SDW1"},
        { MMC5Sound.env, 2, "SDEV"},
        { &MMC5Sound.enable, 1, "SDEN"},
        { &MMC5Sound.running, 1, "SDRU"},
        { &MMC5Sound.raw, 1, "SDRW"},
        { &MMC5Sound.rawcontrol, 1, "SDRC"},
        {0}
};

static void GenMMC5_Init(CartInfo *info, int wsize, int battery)
{
 if(wsize)
 {
  WRAM=(uint8*)FCEU_gmalloc(wsize*1024);
  SetupCartPRGMapping(0x10,WRAM,wsize*1024,1);
  AddExState(WRAM, wsize*1024, 0, "WRAM");
 }

 MMC5fill=(uint8*)FCEU_gmalloc(1024);
 ExRAM=(uint8*)FCEU_gmalloc(1024);

 AddExState(MMC5_StateRegs, ~0, 0, 0);
 AddExState(WRAM, wsize*1024, 0, "WRAM");
 AddExState(ExRAM, 1024, 0, "ERAM");
 AddExState(&MMC5HackSPMode, 1, 0, "SPLM");
 AddExState(&MMC5HackSPScroll, 1, 0, "SPLS");
 AddExState(&MMC5HackSPPage, 1, 0, "SPLP");
 AddExState(&MMC50x5130, 1, 0, "5130");

 MMC5WRAMsize=wsize/8;
 BuildWRAMSizeTable();
 GameStateRestore=MMC5_StateRestore;
 info->Power=GenMMC5Reset;

 if(battery)
 {
  info->SaveGame[0]=WRAM;
  if(wsize<=16)
   info->SaveGameLen[0]=8192;
  else
   info->SaveGameLen[0]=32768;
 }

 MMC5HackVROMMask=CHRmask4[0];
 MMC5HackExNTARAMPtr=ExRAM;
 MMC5Hack=1;
 MMC5HackVROMPTR=CHRptr[0];
 MMC5HackCHRMode=0;
 MMC5HackSPMode=MMC5HackSPScroll=MMC5HackSPPage=0;
 Mapper5_ESI();

 FFCEUX_PPURead = mmc5_PPURead;
 FFCEUX_PPUWrite = mmc5_PPUWrite;
}

void Mapper5_Init(CartInfo *info)
{
 GenMMC5_Init(info, DetectMMC5WRAMSize(info->CRC32), info->battery);
}

// ELROM seems to have 0KB of WRAM
// EKROM seems to have 8KB of WRAM
// ETROM seems to have 16KB of WRAM
// EWROM seems to have 32KB of WRAM

// ETROM and EWROM are battery-backed, EKROM isn't.

void ETROM_Init(CartInfo *info)
{
 GenMMC5_Init(info, 16,info->battery);
}

void ELROM_Init(CartInfo *info)
{
 GenMMC5_Init(info,0,0);
}

void EWROM_Init(CartInfo *info)
{
 GenMMC5_Init(info,32,info->battery);
}

void EKROM_Init(CartInfo *info)
{
 GenMMC5_Init(info,8,info->battery);
}

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