X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=Pico%2FMemory.c;fp=Pico%2FMemory.c;h=0000000000000000000000000000000000000000;hb=efcba75f8a730340df6c1b679a207723f98d1ee6;hp=8975fa209b422b1877df01f8d7ec4b5646cfa909;hpb=6a13ef3f56a80ac698d463f5d00235ea2a090f52;p=picodrive.git

diff --git a/Pico/Memory.c b/Pico/Memory.c
deleted file mode 100644
index 8975fa2..0000000
--- a/Pico/Memory.c
+++ /dev/null
@@ -1,1071 +0,0 @@
-// This is part of Pico Library
-
-// (c) Copyright 2004 Dave, All rights reserved.
-// (c) Copyright 2006,2007 notaz, All rights reserved.
-// Free for non-commercial use.
-
-// For commercial use, separate licencing terms must be obtained.
-
-
-#include "PicoInt.h"
-
-#include "sound/ym2612.h"
-#include "sound/sn76496.h"
-
-#ifndef UTYPES_DEFINED
-typedef unsigned char  u8;
-typedef unsigned short u16;
-typedef unsigned int   u32;
-#define UTYPES_DEFINED
-#endif
-
-extern unsigned int lastSSRamWrite; // used by serial SRAM code
-
-#ifdef _ASM_MEMORY_C
-u32  PicoRead8(u32 a);
-u32  PicoRead16(u32 a);
-void PicoWrite8(u32 a,u8 d);
-void PicoWriteRomHW_SSF2(u32 a,u32 d);
-#endif
-
-
-#ifdef EMU_CORE_DEBUG
-u32 lastread_a, lastread_d[16]={0,}, lastwrite_cyc_d[16]={0,}, lastwrite_mus_d[16]={0,};
-int lrp_cyc=0, lrp_mus=0, lwp_cyc=0, lwp_mus=0;
-extern unsigned int ppop;
-#endif
-
-#ifdef IO_STATS
-void log_io(unsigned int addr, int bits, int rw);
-#elif defined(_MSC_VER)
-#define log_io
-#else
-#define log_io(...)
-#endif
-
-#if defined(EMU_C68K)
-static __inline int PicoMemBase(u32 pc)
-{
-  int membase=0;
-
-  if (pc<Pico.romsize+4)
-  {
-    membase=(int)Pico.rom; // Program Counter in Rom
-  }
-  else if ((pc&0xe00000)==0xe00000)
-  {
-    membase=(int)Pico.ram-(pc&0xff0000); // Program Counter in Ram
-  }
-  else
-  {
-    // Error - Program Counter is invalid
-    membase=(int)Pico.rom;
-  }
-
-  return membase;
-}
-#endif
-
-
-PICO_INTERNAL u32 PicoCheckPc(u32 pc)
-{
-  u32 ret=0;
-#if defined(EMU_C68K)
-  pc-=PicoCpuCM68k.membase; // Get real pc
-//  pc&=0xfffffe;
-  pc&=~1;
-  if ((pc<<8) == 0)
-  {
-    elprintf(EL_STATUS|EL_ANOMALY, "%i:%03i: game crash detected @ %06x\n",
-      Pico.m.frame_count, Pico.m.scanline, SekPc);
-    return (int)Pico.rom + Pico.romsize; // common crash condition, may happen with bad ROMs
-  }
-
-  PicoCpuCM68k.membase=PicoMemBase(pc&0x00ffffff);
-  PicoCpuCM68k.membase-=pc&0xff000000;
-
-  ret = PicoCpuCM68k.membase+pc;
-#endif
-  return ret;
-}
-
-
-PICO_INTERNAL void PicoInitPc(u32 pc)
-{
-  PicoCheckPc(pc);
-}
-
-#ifndef _ASM_MEMORY_C
-PICO_INTERNAL_ASM void PicoMemReset(void)
-{
-}
-#endif
-
-// -----------------------------------------------------------------
-
-int PadRead(int i)
-{
-  int pad,value,data_reg;
-  pad=~PicoPadInt[i]; // Get inverse of pad MXYZ SACB RLDU
-  data_reg=Pico.ioports[i+1];
-
-  // orr the bits, which are set as output
-  value = data_reg&(Pico.ioports[i+4]|0x80);
-
-  if (PicoOpt & POPT_6BTN_PAD)
-  {
-    int phase = Pico.m.padTHPhase[i];
-
-    if(phase == 2 && !(data_reg&0x40)) { // TH
-      value|=(pad&0xc0)>>2;              // ?0SA 0000
-      return value;
-    } else if(phase == 3) {
-      if(data_reg&0x40)
-        value|=(pad&0x30)|((pad>>8)&0xf);  // ?1CB MXYZ
-      else
-        value|=((pad&0xc0)>>2)|0x0f;       // ?0SA 1111
-      return value;
-    }
-  }
-
-  if(data_reg&0x40) // TH
-       value|=(pad&0x3f);              // ?1CB RLDU
-  else value|=((pad&0xc0)>>2)|(pad&3); // ?0SA 00DU
-
-  return value; // will mirror later
-}
-
-
-#ifndef _ASM_MEMORY_C
-static
-#endif
-u32 SRAMRead(u32 a)
-{
-  unsigned int sreg = Pico.m.sram_reg;
-  if (!(sreg & 0x10) && (sreg & 1) && a > 0x200001) { // not yet detected SRAM
-    elprintf(EL_SRAMIO, "normal sram detected.");
-    Pico.m.sram_reg|=0x10; // should be normal SRAM
-  }
-  if (sreg & 4) // EEPROM read
-    return SRAMReadEEPROM();
-  else // if(sreg & 1) // (sreg&5) is one of prerequisites
-    return *(u8 *)(SRam.data-SRam.start+a);
-}
-
-#ifndef _ASM_MEMORY_C
-static
-#endif
-u32 SRAMRead16(u32 a)
-{
-  u32 d;
-  if (Pico.m.sram_reg & 4) {
-    d = SRAMReadEEPROM();
-    d |= d << 8;
-  } else {
-    u8 *pm=(u8 *)(SRam.data-SRam.start+a);
-    d =*pm++ << 8;
-    d|=*pm++;
-  }
-  return d;
-}
-
-static void SRAMWrite(u32 a, u32 d)
-{
-  unsigned int sreg = Pico.m.sram_reg;
-  if(!(sreg & 0x10)) {
-    // not detected SRAM
-    if((a&~1)==0x200000) {
-      elprintf(EL_SRAMIO, "eeprom detected.");
-      sreg|=4; // this should be a game with EEPROM (like NBA Jam)
-      SRam.start=0x200000; SRam.end=SRam.start+1;
-    } else
-      elprintf(EL_SRAMIO, "normal sram detected.");
-    sreg|=0x10;
-    Pico.m.sram_reg=sreg;
-  }
-  if(sreg & 4) { // EEPROM write
-    // this diff must be at most 16 for NBA Jam to work
-    if(SekCyclesDoneT()-lastSSRamWrite < 16) {
-      // just update pending state
-      elprintf(EL_EEPROM, "eeprom: skip because cycles=%i", SekCyclesDoneT()-lastSSRamWrite);
-      SRAMUpdPending(a, d);
-    } else {
-      int old=sreg;
-      SRAMWriteEEPROM(sreg>>6); // execute pending
-      SRAMUpdPending(a, d);
-      if ((old^Pico.m.sram_reg)&0xc0) // update time only if SDA/SCL changed
-        lastSSRamWrite = SekCyclesDoneT();
-    }
-  } else if(!(sreg & 2)) {
-    u8 *pm=(u8 *)(SRam.data-SRam.start+a);
-    if(*pm != (u8)d) {
-      SRam.changed = 1;
-      *pm=(u8)d;
-    }
-  }
-}
-
-// for nonstandard reads
-static u32 OtherRead16End(u32 a, int realsize)
-{
-  u32 d=0;
-
-  // 32x test
-/*
-  if      (a == 0xa130ec) { d = 0x4d41; goto end; } // MA
-  else if (a == 0xa130ee) { d = 0x5253; goto end; } // RS
-  else if (a == 0xa15100) { d = 0x0080; goto end; }
-  else
-*/
-
-  // for games with simple protection devices, discovered by Haze
-  // some dumb detection is used, but that should be enough to make things work
-  if ((a>>22) == 1 && Pico.romsize >= 512*1024) {
-    if      (*(int *)(Pico.rom+0x123e4) == 0x00550c39 && *(int *)(Pico.rom+0x123e8) == 0x00000040) { // Super Bubble Bobble (Unl) [!]
-      if      (a == 0x400000) { d=0x55<<8; goto end; }
-      else if (a == 0x400002) { d=0x0f<<8; goto end; }
-    }
-    else if (*(int *)(Pico.rom+0x008c4) == 0x66240055 && *(int *)(Pico.rom+0x008c8) == 0x00404df9) { // Smart Mouse (Unl)
-      if      (a == 0x400000) { d=0x55<<8; goto end; }
-      else if (a == 0x400002) { d=0x0f<<8; goto end; }
-      else if (a == 0x400004) { d=0xaa<<8; goto end; }
-      else if (a == 0x400006) { d=0xf0<<8; goto end; }
-    }
-    else if (*(int *)(Pico.rom+0x00404) == 0x00a90600 && *(int *)(Pico.rom+0x00408) == 0x6708b013) { // King of Fighters '98, The (Unl) [!]
-      if      (a == 0x480000 || a == 0x4800e0 || a == 0x4824a0 || a == 0x488880) { d=0xaa<<8; goto end; }
-      else if (a == 0x4a8820) { d=0x0a<<8; goto end; }
-      // there is also a read @ 0x4F8820 which needs 0, but that is returned in default case
-    }
-    else if (*(int *)(Pico.rom+0x01b24) == 0x004013f9 && *(int *)(Pico.rom+0x01b28) == 0x00ff0000) { // Mahjong Lover (Unl) [!]
-      if      (a == 0x400000) { d=0x90<<8; goto end; }
-      else if (a == 0x401000) { d=0xd3<<8; goto end; } // this one doesn't seem to be needed, the code does 2 comparisons and only then
-                                                       // checks the result, which is of the above one. Left it just in case.
-    }
-    else if (*(int *)(Pico.rom+0x05254) == 0x0c3962d0 && *(int *)(Pico.rom+0x05258) == 0x00400055) { // Elf Wor (Unl)
-      if      (a == 0x400000) { d=0x55<<8; goto end; }
-      else if (a == 0x400004) { d=0xc9<<8; goto end; } // this check is done if the above one fails
-      else if (a == 0x400002) { d=0x0f<<8; goto end; }
-      else if (a == 0x400006) { d=0x18<<8; goto end; } // similar to above
-    }
-    // our default behaviour is to return whatever was last written a 0x400000-0x7fffff range (used by Squirrel King (R) [!])
-    // Lion King II, The (Unl) [!]  writes @ 400000 and wants to get that val @ 400002 and wites another val
-    // @ 400004 which is expected @ 400006, so we really remember 2 values here
-    d = Pico.m.prot_bytes[(a>>2)&1]<<8;
-  }
-  else if (a == 0xa13000 && Pico.romsize >= 1024*1024) {
-    if      (*(int *)(Pico.rom+0xc8af0) == 0x30133013 && *(int *)(Pico.rom+0xc8af4) == 0x000f0240) { // Rockman X3 (Unl) [!]
-      d=0x0c; goto end;
-    }
-    else if (*(int *)(Pico.rom+0x28888) == 0x07fc0000 && *(int *)(Pico.rom+0x2888c) == 0x4eb94e75) { // Bug's Life, A (Unl) [!]
-      d=0x28; goto end; // does the check from RAM
-    }
-    else if (*(int *)(Pico.rom+0xc8778) == 0x30133013 && *(int *)(Pico.rom+0xc877c) == 0x000f0240) { // Super Mario Bros. (Unl) [!]
-      d=0x0c; goto end; // seems to be the same code as in Rockman X3 (Unl) [!]
-    }
-    else if (*(int *)(Pico.rom+0xf20ec) == 0x30143013 && *(int *)(Pico.rom+0xf20f0) == 0x000f0200) { // Super Mario 2 1998 (Unl) [!]
-      d=0x0a; goto end;
-    }
-  }
-  else if (a == 0xa13002) { // Pocket Monsters (Unl)
-    d=0x01; goto end;
-  }
-  else if (a == 0xa1303E) { // Pocket Monsters (Unl)
-    d=0x1f; goto end;
-  }
-  else if (a == 0x30fe02) {
-    // Virtua Racing - just for fun
-    // this seems to be some flag that SVP is ready or something similar
-    d=1; goto end;
-  }
-
-end:
-  elprintf(EL_UIO, "strange r%i: [%06x] %04x @%06x", realsize, a&0xffffff, d, SekPc);
-  return d;
-}
-
-
-//extern UINT32 mz80GetRegisterValue(void *, UINT32);
-
-static void OtherWrite8End(u32 a,u32 d,int realsize)
-{
-  // sram
-  if(a >= SRam.start && a <= SRam.end) {
-    elprintf(EL_SRAMIO, "sram w8  [%06x] %02x @ %06x", a, d, SekPc);
-    SRAMWrite(a, d);
-    return;
-  }
-
-#ifdef _ASM_MEMORY_C
-  // special ROM hardware (currently only banking and sram reg supported)
-  if((a&0xfffff1) == 0xA130F1) {
-    PicoWriteRomHW_SSF2(a, d); // SSF2 or SRAM
-    return;
-  }
-#else
-  // sram access register
-  if(a == 0xA130F1) {
-    elprintf(EL_SRAMIO, "sram reg=%02x", d);
-    Pico.m.sram_reg &= ~3;
-    Pico.m.sram_reg |= (u8)(d&3);
-    return;
-  }
-#endif
-  elprintf(EL_UIO, "strange w%i: %06x, %08x @%06x", realsize, a&0xffffff, d, SekPc);
-
-  // for games with simple protection devices, discovered by Haze
-  if ((a>>22) == 1)
-    Pico.m.prot_bytes[(a>>2)&1] = (u8)d;
-}
-
-#include "MemoryCmn.c"
-
-
-// -----------------------------------------------------------------
-//                     Read Rom and read Ram
-
-#ifndef _ASM_MEMORY_C
-PICO_INTERNAL_ASM u32 PicoRead8(u32 a)
-{
-  u32 d=0;
-
-  if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram
-
-  a&=0xffffff;
-
-#ifndef EMU_CORE_DEBUG
-  // sram
-  if (a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
-    d = SRAMRead(a);
-    elprintf(EL_SRAMIO, "sram r8 [%06x] %02x @ %06x", a, d, SekPc);
-    goto end;
-  }
-#endif
-
-  if (a<Pico.romsize) { d = *(u8 *)(Pico.rom+(a^1)); goto end; } // Rom
-  log_io(a, 8, 0);
-  if ((a&0xff4000)==0xa00000) { d=z80Read8(a); goto end; } // Z80 Ram
-
-  if ((a&0xe700e0)==0xc00000) { d=PicoVideoRead8(a); goto end; } // VDP
-
-  d=OtherRead16(a&~1, 8);
-  if ((a&1)==0) d>>=8;
-
-end:
-  elprintf(EL_IO, "r8 : %06x,   %02x @%06x", a&0xffffff, (u8)d, SekPc);
-#ifdef EMU_CORE_DEBUG
-  if (a>=Pico.romsize) {
-    lastread_a = a;
-    lastread_d[lrp_cyc++&15] = (u8)d;
-  }
-#endif
-  return d;
-}
-
-PICO_INTERNAL_ASM u32 PicoRead16(u32 a)
-{
-  u32 d=0;
-
-  if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram
-
-  a&=0xfffffe;
-
-#ifndef EMU_CORE_DEBUG
-  // sram
-  if (a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
-    d = SRAMRead16(a);
-    elprintf(EL_SRAMIO, "sram r16 [%06x] %04x @ %06x", a, d, SekPc);
-    goto end;
-  }
-#endif
-
-  if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom
-  log_io(a, 16, 0);
-
-  if ((a&0xe700e0)==0xc00000)
-       d = PicoVideoRead(a);
-  else d = OtherRead16(a, 16);
-
-end:
-  elprintf(EL_IO, "r16: %06x, %04x  @%06x", a&0xffffff, d, SekPc);
-#ifdef EMU_CORE_DEBUG
-  if (a>=Pico.romsize) {
-    lastread_a = a;
-    lastread_d[lrp_cyc++&15] = d;
-  }
-#endif
-  return d;
-}
-
-PICO_INTERNAL_ASM u32 PicoRead32(u32 a)
-{
-  u32 d=0;
-
-  if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram
-
-  a&=0xfffffe;
-
-  // sram
-  if(a >= SRam.start && a <= SRam.end && (Pico.m.sram_reg&5)) {
-    d = (SRAMRead16(a)<<16)|SRAMRead16(a+2);
-    elprintf(EL_SRAMIO, "sram r32 [%06x] %08x @ %06x", a, d, SekPc);
-    goto end;
-  }
-
-  if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom
-  log_io(a, 32, 0);
-
-  if ((a&0xe700e0)==0xc00000)
-       d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2);
-  else d = (OtherRead16(a, 32)<<16)|OtherRead16(a+2, 32);
-
-end:
-  elprintf(EL_IO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc);
-#ifdef EMU_CORE_DEBUG
-  if (a>=Pico.romsize) {
-    lastread_a = a;
-    lastread_d[lrp_cyc++&15] = d;
-  }
-#endif
-  return d;
-}
-#endif
-
-// -----------------------------------------------------------------
-//                            Write Ram
-
-#if !defined(_ASM_MEMORY_C) || defined(_ASM_MEMORY_C_AMIPS)
-PICO_INTERNAL_ASM void PicoWrite8(u32 a,u8 d)
-{
-  elprintf(EL_IO, "w8 : %06x,   %02x @%06x", a&0xffffff, d, SekPc);
-#ifdef EMU_CORE_DEBUG
-  lastwrite_cyc_d[lwp_cyc++&15] = d;
-#endif
-
-  if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram
-  log_io(a, 8, 1);
-
-  a&=0xffffff;
-  OtherWrite8(a,d);
-}
-#endif
-
-void PicoWrite16(u32 a,u16 d)
-{
-  elprintf(EL_IO, "w16: %06x, %04x", a&0xffffff, d);
-#ifdef EMU_CORE_DEBUG
-  lastwrite_cyc_d[lwp_cyc++&15] = d;
-#endif
-
-  if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram
-  log_io(a, 16, 1);
-
-  a&=0xfffffe;
-  if ((a&0xe700e0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP
-  OtherWrite16(a,d);
-}
-
-static void PicoWrite32(u32 a,u32 d)
-{
-  elprintf(EL_IO, "w32: %06x, %08x @%06x", a&0xffffff, d, SekPc);
-#ifdef EMU_CORE_DEBUG
-  lastwrite_cyc_d[lwp_cyc++&15] = d;
-#endif
-
-  if ((a&0xe00000)==0xe00000)
-  {
-    // Ram:
-    u16 *pm=(u16 *)(Pico.ram+(a&0xfffe));
-    pm[0]=(u16)(d>>16); pm[1]=(u16)d;
-    return;
-  }
-  log_io(a, 32, 1);
-
-  a&=0xfffffe;
-  if ((a&0xe700e0)==0xc00000)
-  {
-    // VDP:
-    PicoVideoWrite(a,  (u16)(d>>16));
-    PicoVideoWrite(a+2,(u16)d);
-    return;
-  }
-
-  OtherWrite16(a,  (u16)(d>>16));
-  OtherWrite16(a+2,(u16)d);
-}
-
-
-// -----------------------------------------------------------------
-
-static void OtherWrite16End(u32 a,u32 d,int realsize)
-{
-  PicoWrite8Hook(a,  d>>8, realsize);
-  PicoWrite8Hook(a+1,d&0xff, realsize);
-}
-
-u32  (*PicoRead16Hook) (u32 a, int realsize) = OtherRead16End;
-void (*PicoWrite8Hook) (u32 a, u32 d, int realsize) = OtherWrite8End;
-void (*PicoWrite16Hook)(u32 a, u32 d, int realsize) = OtherWrite16End;
-
-PICO_INTERNAL void PicoMemResetHooks(void)
-{
-  // default unmapped/cart specific handlers
-  PicoRead16Hook = OtherRead16End;
-  PicoWrite8Hook = OtherWrite8End;
-  PicoWrite16Hook = OtherWrite16End;
-}
-
-#ifdef EMU_M68K
-static void m68k_mem_setup(void);
-#endif
-
-PICO_INTERNAL void PicoMemSetup(void)
-{
-  // Setup memory callbacks:
-#ifdef EMU_C68K
-  PicoCpuCM68k.checkpc=PicoCheckPc;
-  PicoCpuCM68k.fetch8 =PicoCpuCM68k.read8 =PicoRead8;
-  PicoCpuCM68k.fetch16=PicoCpuCM68k.read16=PicoRead16;
-  PicoCpuCM68k.fetch32=PicoCpuCM68k.read32=PicoRead32;
-  PicoCpuCM68k.write8 =PicoWrite8;
-  PicoCpuCM68k.write16=PicoWrite16;
-  PicoCpuCM68k.write32=PicoWrite32;
-#endif
-#ifdef EMU_F68K
-  PicoCpuFM68k.read_byte =PicoRead8;
-  PicoCpuFM68k.read_word =PicoRead16;
-  PicoCpuFM68k.read_long =PicoRead32;
-  PicoCpuFM68k.write_byte=PicoWrite8;
-  PicoCpuFM68k.write_word=PicoWrite16;
-  PicoCpuFM68k.write_long=PicoWrite32;
-
-  // setup FAME fetchmap
-  {
-    int i;
-    // by default, point everything to first 64k of ROM
-    for (i = 0; i < M68K_FETCHBANK1; i++)
-      PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.rom - (i<<(24-FAMEC_FETCHBITS));
-    // now real ROM
-    for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < Pico.romsize; i++)
-      PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.rom;
-    // .. and RAM
-    for (i = M68K_FETCHBANK1*14/16; i < M68K_FETCHBANK1; i++)
-      PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.ram - (i<<(24-FAMEC_FETCHBITS));
-  }
-#endif
-#ifdef EMU_M68K
-  m68k_mem_setup();
-#endif
-}
-
-/* some nasty things below :( */
-#ifdef EMU_M68K
-unsigned int (*pm68k_read_memory_8) (unsigned int address) = NULL;
-unsigned int (*pm68k_read_memory_16)(unsigned int address) = NULL;
-unsigned int (*pm68k_read_memory_32)(unsigned int address) = NULL;
-void (*pm68k_write_memory_8) (unsigned int address, unsigned char  value) = NULL;
-void (*pm68k_write_memory_16)(unsigned int address, unsigned short value) = NULL;
-void (*pm68k_write_memory_32)(unsigned int address, unsigned int   value) = NULL;
-unsigned int (*pm68k_read_memory_pcr_8) (unsigned int address) = NULL;
-unsigned int (*pm68k_read_memory_pcr_16)(unsigned int address) = NULL;
-unsigned int (*pm68k_read_memory_pcr_32)(unsigned int address) = NULL;
-
-// these are here for core debugging mode
-static unsigned int  m68k_read_8 (unsigned int a, int do_fake)
-{
-  a&=0xffffff;
-  if(a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)    return *(u8 *)(Pico.rom+(a^1)); // Rom
-#ifdef EMU_CORE_DEBUG
-  if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
-#endif
-  return pm68k_read_memory_pcr_8(a);
-}
-static unsigned int  m68k_read_16(unsigned int a, int do_fake)
-{
-  a&=0xffffff;
-  if(a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)    return *(u16 *)(Pico.rom+(a&~1)); // Rom
-#ifdef EMU_CORE_DEBUG
-  if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
-#endif
-  return pm68k_read_memory_pcr_16(a);
-}
-static unsigned int  m68k_read_32(unsigned int a, int do_fake)
-{
-  a&=0xffffff;
-  if(a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }
-#ifdef EMU_CORE_DEBUG
-  if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
-#endif
-  return pm68k_read_memory_pcr_32(a);
-}
-
-unsigned int m68k_read_pcrelative_8 (unsigned int a)   { return m68k_read_8 (a, 1); }
-unsigned int m68k_read_pcrelative_16(unsigned int a)   { return m68k_read_16(a, 1); }
-unsigned int m68k_read_pcrelative_32(unsigned int a)   { return m68k_read_32(a, 1); }
-unsigned int m68k_read_immediate_16(unsigned int a)    { return m68k_read_16(a, 0); }
-unsigned int m68k_read_immediate_32(unsigned int a)    { return m68k_read_32(a, 0); }
-unsigned int m68k_read_disassembler_8 (unsigned int a) { return m68k_read_8 (a, 0); }
-unsigned int m68k_read_disassembler_16(unsigned int a) { return m68k_read_16(a, 0); }
-unsigned int m68k_read_disassembler_32(unsigned int a) { return m68k_read_32(a, 0); }
-
-static unsigned int m68k_read_memory_pcr_8(unsigned int a)
-{
-  if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram
-  return 0;
-}
-
-static unsigned int m68k_read_memory_pcr_16(unsigned int a)
-{
-  if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram
-  return 0;
-}
-
-static unsigned int m68k_read_memory_pcr_32(unsigned int a)
-{
-  if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram
-  return 0;
-}
-
-#ifdef EMU_CORE_DEBUG
-// ROM only
-unsigned int m68k_read_memory_8(unsigned int a)
-{
-  u8 d;
-  if (a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)
-       d = *(u8 *) (Pico.rom+(a^1));
-  else d = (u8) lastread_d[lrp_mus++&15];
-  elprintf(EL_IO, "r8_mu : %06x,   %02x @%06x", a&0xffffff, d, SekPc);
-  return d;
-}
-unsigned int m68k_read_memory_16(unsigned int a)
-{
-  u16 d;
-  if (a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)
-       d = *(u16 *)(Pico.rom+(a&~1));
-  else d = (u16) lastread_d[lrp_mus++&15];
-  elprintf(EL_IO, "r16_mu: %06x, %04x @%06x", a&0xffffff, d, SekPc);
-  return d;
-}
-unsigned int m68k_read_memory_32(unsigned int a)
-{
-  u32 d;
-  if (a<Pico.romsize && m68ki_cpu_p==&PicoCpuMM68k)
-       { u16 *pm=(u16 *)(Pico.rom+(a&~1));d=(pm[0]<<16)|pm[1]; }
-  else if (a <= 0x78) d = m68k_read_32(a, 0);
-  else d = lastread_d[lrp_mus++&15];
-  elprintf(EL_IO, "r32_mu: %06x, %08x @%06x", a&0xffffff, d, SekPc);
-  return d;
-}
-
-// ignore writes, Cyclone already done that
-void m68k_write_memory_8(unsigned int address, unsigned int value)  { lastwrite_mus_d[lwp_mus++&15] = value; }
-void m68k_write_memory_16(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }
-void m68k_write_memory_32(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }
-
-#else // if !EMU_CORE_DEBUG
-
-/* it appears that Musashi doesn't always mask the unused bits */
-unsigned int m68k_read_memory_8 (unsigned int address) { return pm68k_read_memory_8 (address) & 0xff; }
-unsigned int m68k_read_memory_16(unsigned int address) { return pm68k_read_memory_16(address) & 0xffff; }
-unsigned int m68k_read_memory_32(unsigned int address) { return pm68k_read_memory_32(address); }
-void m68k_write_memory_8 (unsigned int address, unsigned int value) { pm68k_write_memory_8 (address, (u8)value); }
-void m68k_write_memory_16(unsigned int address, unsigned int value) { pm68k_write_memory_16(address,(u16)value); }
-void m68k_write_memory_32(unsigned int address, unsigned int value) { pm68k_write_memory_32(address, value); }
-#endif // !EMU_CORE_DEBUG
-
-static void m68k_mem_setup(void)
-{
-  pm68k_read_memory_8  = PicoRead8;
-  pm68k_read_memory_16 = PicoRead16;
-  pm68k_read_memory_32 = PicoRead32;
-  pm68k_write_memory_8  = PicoWrite8;
-  pm68k_write_memory_16 = PicoWrite16;
-  pm68k_write_memory_32 = PicoWrite32;
-  pm68k_read_memory_pcr_8  = m68k_read_memory_pcr_8;
-  pm68k_read_memory_pcr_16 = m68k_read_memory_pcr_16;
-  pm68k_read_memory_pcr_32 = m68k_read_memory_pcr_32;
-}
-#endif // EMU_M68K
-
-
-// -----------------------------------------------------------------
-
-static int get_scanline(int is_from_z80)
-{
-  if (is_from_z80) {
-    int cycles = z80_cyclesDone();
-    while (cycles - z80_scanline_cycles >= 228)
-      z80_scanline++, z80_scanline_cycles += 228;
-    return z80_scanline;
-  }
-
-  return Pico.m.scanline;
-}
-
-/* probably should not be in this file, but it's near related code here */
-void ym2612_sync_timers(int z80_cycles, int mode_old, int mode_new)
-{
-  int xcycles = z80_cycles << 8;
-
-  /* check for overflows */
-  if ((mode_old & 4) && xcycles > timer_a_next_oflow)
-    ym2612.OPN.ST.status |= 1;
-
-  if ((mode_old & 8) && xcycles > timer_b_next_oflow)
-    ym2612.OPN.ST.status |= 2;
-
-  /* update timer a */
-  if (mode_old & 1)
-    while (xcycles > timer_a_next_oflow)
-      timer_a_next_oflow += timer_a_step;
-
-  if ((mode_old ^ mode_new) & 1) // turning on/off
-  {
-    if (mode_old & 1)
-      timer_a_next_oflow = TIMER_NO_OFLOW;
-    else
-      timer_a_next_oflow = xcycles + timer_a_step;
-  }
-  if (mode_new & 1)
-    elprintf(EL_YMTIMER, "timer a upd to %i @ %i", timer_a_next_oflow>>8, z80_cycles);
-
-  /* update timer b */
-  if (mode_old & 2)
-    while (xcycles > timer_b_next_oflow)
-      timer_b_next_oflow += timer_b_step;
-
-  if ((mode_old ^ mode_new) & 2)
-  {
-    if (mode_old & 2)
-      timer_b_next_oflow = TIMER_NO_OFLOW;
-    else
-      timer_b_next_oflow = xcycles + timer_b_step;
-  }
-  if (mode_new & 2)
-    elprintf(EL_YMTIMER, "timer b upd to %i @ %i", timer_b_next_oflow>>8, z80_cycles);
-}
-
-// ym2612 DAC and timer I/O handlers for z80
-int ym2612_write_local(u32 a, u32 d, int is_from_z80)
-{
-  int addr;
-
-  a &= 3;
-  if (a == 1 && ym2612.OPN.ST.address == 0x2a) /* DAC data */
-  {
-    int scanline = get_scanline(is_from_z80);
-    //elprintf(EL_STATUS, "%03i -> %03i dac w %08x z80 %i", PsndDacLine, scanline, d, is_from_z80);
-    ym2612.dacout = ((int)d - 0x80) << 6;
-    if (PsndOut && ym2612.dacen && scanline >= PsndDacLine)
-      PsndDoDAC(scanline);
-    return 0;
-  }
-
-  switch (a)
-  {
-    case 0: /* address port 0 */
-      ym2612.OPN.ST.address = d;
-      ym2612.addr_A1 = 0;
-#ifdef __GP2X__
-      if (PicoOpt & POPT_EXT_FM) YM2612Write_940(a, d, -1);
-#endif
-      return 0;
-
-    case 1: /* data port 0    */
-      if (ym2612.addr_A1 != 0)
-        return 0;
-
-      addr = ym2612.OPN.ST.address;
-      ym2612.REGS[addr] = d;
-
-      switch (addr)
-      {
-        case 0x24: // timer A High 8
-        case 0x25: { // timer A Low 2
-          int TAnew = (addr == 0x24) ? ((ym2612.OPN.ST.TA & 0x03)|(((int)d)<<2))
-                                     : ((ym2612.OPN.ST.TA & 0x3fc)|(d&3));
-          if (ym2612.OPN.ST.TA != TAnew)
-          {
-            //elprintf(EL_STATUS, "timer a set %i", TAnew);
-            ym2612.OPN.ST.TA = TAnew;
-            //ym2612.OPN.ST.TAC = (1024-TAnew)*18;
-            //ym2612.OPN.ST.TAT = 0;
-            timer_a_step = TIMER_A_TICK_ZCYCLES * (1024 - TAnew);
-            if (ym2612.OPN.ST.mode & 1) {
-              // this is not right, should really be done on overflow only
-              int cycles = is_from_z80 ? z80_cyclesDone() : cycles_68k_to_z80(SekCyclesDone());
-              timer_a_next_oflow = (cycles << 8) + timer_a_step;
-            }
-            elprintf(EL_YMTIMER, "timer a set to %i, %i", 1024 - TAnew, timer_a_next_oflow>>8);
-          }
-          return 0;
-        }
-        case 0x26: // timer B
-          if (ym2612.OPN.ST.TB != d) {
-            //elprintf(EL_STATUS, "timer b set %i", d);
-            ym2612.OPN.ST.TB = d;
-            //ym2612.OPN.ST.TBC = (256-d) * 288;
-            //ym2612.OPN.ST.TBT  = 0;
-            timer_b_step = TIMER_B_TICK_ZCYCLES * (256 - d); // 262800
-            if (ym2612.OPN.ST.mode & 2) {
-              int cycles = is_from_z80 ? z80_cyclesDone() : cycles_68k_to_z80(SekCyclesDone());
-              timer_b_next_oflow = (cycles << 8) + timer_b_step;
-            }
-            elprintf(EL_YMTIMER, "timer b set to %i, %i", 256 - d, timer_b_next_oflow>>8);
-          }
-          return 0;
-        case 0x27: { /* mode, timer control */
-          int old_mode = ym2612.OPN.ST.mode;
-          int cycles = is_from_z80 ? z80_cyclesDone() : cycles_68k_to_z80(SekCyclesDone());
-          ym2612.OPN.ST.mode = d;
-
-          elprintf(EL_YMTIMER, "st mode %02x", d);
-          ym2612_sync_timers(cycles, old_mode, d);
-
-          /* reset Timer a flag */
-          if (d & 0x10)
-            ym2612.OPN.ST.status &= ~1;
-
-          /* reset Timer b flag */
-          if (d & 0x20)
-            ym2612.OPN.ST.status &= ~2;
-
-          if ((d ^ old_mode) & 0xc0) {
-#ifdef __GP2X__
-            if (PicoOpt & POPT_EXT_FM) return YM2612Write_940(a, d, get_scanline(is_from_z80));
-#endif
-            return 1;
-          }
-          return 0;
-        }
-        case 0x2b: { /* DAC Sel  (YM2612) */
-          int scanline = get_scanline(is_from_z80);
-          ym2612.dacen = d & 0x80;
-          if (d & 0x80) PsndDacLine = scanline;
-#ifdef __GP2X__
-          if (PicoOpt & POPT_EXT_FM) YM2612Write_940(a, d, scanline);
-#endif
-          return 0;
-        }
-      }
-      break;
-
-    case 2: /* address port 1 */
-      ym2612.OPN.ST.address = d;
-      ym2612.addr_A1 = 1;
-#ifdef __GP2X__
-      if (PicoOpt & POPT_EXT_FM) YM2612Write_940(a, d, -1);
-#endif
-      return 0;
-
-    case 3: /* data port 1    */
-      if (ym2612.addr_A1 != 1)
-        return 0;
-
-      addr = ym2612.OPN.ST.address | 0x100;
-      ym2612.REGS[addr] = d;
-      break;
-  }
-
-#ifdef __GP2X__
-  if (PicoOpt & POPT_EXT_FM)
-    return YM2612Write_940(a, d, get_scanline(is_from_z80));
-#endif
-  return YM2612Write_(a, d);
-}
-
-
-#define ym2612_read_local() \
-  if (xcycles >= timer_a_next_oflow) \
-    ym2612.OPN.ST.status |= (ym2612.OPN.ST.mode >> 2) & 1; \
-  if (xcycles >= timer_b_next_oflow) \
-    ym2612.OPN.ST.status |= (ym2612.OPN.ST.mode >> 2) & 2
-
-u32 ym2612_read_local_z80(void)
-{
-  int xcycles = z80_cyclesDone() << 8;
-
-  ym2612_read_local();
-
-  elprintf(EL_YMTIMER, "timer z80 read %i, sched %i, %i @ %i|%i", ym2612.OPN.ST.status,
-      timer_a_next_oflow>>8, timer_b_next_oflow>>8, xcycles >> 8, (xcycles >> 8) / 228);
-  return ym2612.OPN.ST.status;
-}
-
-u32 ym2612_read_local_68k(void)
-{
-  int xcycles = cycles_68k_to_z80(SekCyclesDone()) << 8;
-
-  ym2612_read_local();
-
-  elprintf(EL_YMTIMER, "timer 68k read %i, sched %i, %i @ %i|%i", ym2612.OPN.ST.status,
-      timer_a_next_oflow>>8, timer_b_next_oflow>>8, xcycles >> 8, (xcycles >> 8) / 228);
-  return ym2612.OPN.ST.status;
-}
-
-void ym2612_pack_state(void)
-{
-  // timers are saved as tick counts, in 16.16 int format
-  int tac, tat = 0, tbc, tbt = 0;
-  tac = 1024 - ym2612.OPN.ST.TA;
-  tbc = 256  - ym2612.OPN.ST.TB;
-  if (timer_a_next_oflow != TIMER_NO_OFLOW)
-    tat = (int)((double)(timer_a_step - timer_a_next_oflow) / (double)timer_a_step * tac * 65536);
-  if (timer_b_next_oflow != TIMER_NO_OFLOW)
-    tbt = (int)((double)(timer_b_step - timer_b_next_oflow) / (double)timer_b_step * tbc * 65536);
-  elprintf(EL_YMTIMER, "save: timer a %i/%i", tat >> 16, tac);
-  elprintf(EL_YMTIMER, "save: timer b %i/%i", tbt >> 16, tbc);
-
-#ifdef __GP2X__
-  if (PicoOpt & POPT_EXT_FM)
-    YM2612PicoStateSave2_940(tat, tbt);
-  else
-#endif
-    YM2612PicoStateSave2(tat, tbt);
-}
-
-void ym2612_unpack_state(void)
-{
-  int i, ret, tac, tat, tbc, tbt;
-  YM2612PicoStateLoad();
-
-  // feed all the registers and update internal state
-  for (i = 0x20; i < 0xA0; i++) {
-    ym2612_write_local(0, i, 0);
-    ym2612_write_local(1, ym2612.REGS[i], 0);
-  }
-  for (i = 0x30; i < 0xA0; i++) {
-    ym2612_write_local(2, i, 0);
-    ym2612_write_local(3, ym2612.REGS[i|0x100], 0);
-  }
-  for (i = 0xAF; i >= 0xA0; i--) { // must apply backwards
-    ym2612_write_local(2, i, 0);
-    ym2612_write_local(3, ym2612.REGS[i|0x100], 0);
-    ym2612_write_local(0, i, 0);
-    ym2612_write_local(1, ym2612.REGS[i], 0);
-  }
-  for (i = 0xB0; i < 0xB8; i++) {
-    ym2612_write_local(0, i, 0);
-    ym2612_write_local(1, ym2612.REGS[i], 0);
-    ym2612_write_local(2, i, 0);
-    ym2612_write_local(3, ym2612.REGS[i|0x100], 0);
-  }
-
-#ifdef __GP2X__
-  if (PicoOpt & POPT_EXT_FM)
-    ret = YM2612PicoStateLoad2_940(&tat, &tbt);
-  else
-#endif
-    ret = YM2612PicoStateLoad2(&tat, &tbt);
-  if (ret != 0) {
-    elprintf(EL_STATUS, "old ym2612 state");
-    return; // no saved timers
-  }
-
-  tac = (1024 - ym2612.OPN.ST.TA) << 16;
-  tbc = (256  - ym2612.OPN.ST.TB) << 16;
-  if (ym2612.OPN.ST.mode & 1)
-    timer_a_next_oflow = (int)((double)(tac - tat) / (double)tac * timer_a_step);
-  else
-    timer_a_next_oflow = TIMER_NO_OFLOW;
-  if (ym2612.OPN.ST.mode & 2)
-    timer_b_next_oflow = (int)((double)(tbc - tbt) / (double)tbc * timer_b_step);
-  else
-    timer_b_next_oflow = TIMER_NO_OFLOW;
-  elprintf(EL_YMTIMER, "load: %i/%i, timer_a_next_oflow %i", tat>>16, tac>>16, timer_a_next_oflow >> 8);
-  elprintf(EL_YMTIMER, "load: %i/%i, timer_b_next_oflow %i", tbt>>16, tbc>>16, timer_b_next_oflow >> 8);
-}
-
-// -----------------------------------------------------------------
-//                        z80 memhandlers
-
-PICO_INTERNAL unsigned char z80_read(unsigned short a)
-{
-  u8 ret = 0;
-
-  if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)
-  {
-    return ym2612_read_local_z80();
-  }
-
-  if (a>=0x8000)
-  {
-    extern u32 PicoReadM68k8(u32 a);
-    u32 addr68k;
-    addr68k=Pico.m.z80_bank68k<<15;
-    addr68k+=a&0x7fff;
-
-    if (addr68k < Pico.romsize) { ret = Pico.rom[addr68k^1]; goto bnkend; }
-    elprintf(EL_ANOMALY, "z80->68k upper read [%06x] %02x", addr68k, ret);
-    if (PicoAHW & PAHW_MCD)
-         ret = PicoReadM68k8(addr68k);
-    else ret = PicoRead8(addr68k);
-bnkend:
-    elprintf(EL_Z80BNK, "z80->68k r8 [%06x] %02x", addr68k, ret);
-    return ret;
-  }
-
-  // should not be needed, cores should be able to access RAM themselves
-  if (a<0x4000) return Pico.zram[a&0x1fff];
-
-  elprintf(EL_ANOMALY, "z80 invalid r8 [%06x] %02x", a, ret);
-  return ret;
-}
-
-#ifndef _USE_CZ80
-PICO_INTERNAL_ASM void z80_write(unsigned char data, unsigned short a)
-#else
-PICO_INTERNAL_ASM void z80_write(unsigned int a, unsigned char data)
-#endif
-{
-  if ((a>>13)==2) // 0x4000-0x5fff (Charles MacDonald)
-  {
-    if(PicoOpt&POPT_EN_FM) emustatus|=ym2612_write_local(a, data, 1) & 1;
-    return;
-  }
-
-  if ((a&0xfff9)==0x7f11) // 7f11 7f13 7f15 7f17
-  {
-    if(PicoOpt&POPT_EN_PSG) SN76496Write(data);
-    return;
-  }
-
-  if ((a>>8)==0x60)
-  {
-    Pico.m.z80_bank68k>>=1;
-    Pico.m.z80_bank68k|=(data&1)<<8;
-    Pico.m.z80_bank68k&=0x1ff; // 9 bits and filled in the new top one
-    return;
-  }
-
-  if (a>=0x8000)
-  {
-    extern void PicoWriteM68k8(u32 a,u8 d);
-    u32 addr68k;
-    addr68k=Pico.m.z80_bank68k<<15;
-    addr68k+=a&0x7fff;
-    elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, data);
-    if (PicoAHW & PAHW_MCD)
-         PicoWriteM68k8(addr68k, data);
-    else PicoWrite8(addr68k, data);
-    return;
-  }
-
-  // should not be needed
-  if (a<0x4000) { Pico.zram[a&0x1fff]=data; return; }
-
-  elprintf(EL_ANOMALY, "z80 invalid w8 [%06x] %02x", a, data);
-}
-
-#ifndef _USE_CZ80
-PICO_INTERNAL unsigned short z80_read16(unsigned short a)
-{
-  return (u16) ( (u16)z80_read(a) | ((u16)z80_read((u16)(a+1))<<8) );
-}
-
-PICO_INTERNAL void z80_write16(unsigned short data, unsigned short a)
-{
-  z80_write((unsigned char) data,a);
-  z80_write((unsigned char)(data>>8),(u16)(a+1));
-}
-#endif
-