[picodrive.git] / Pico / VideoPort.c

// This is part of Pico Library\r
\r
// (c) Copyright 2004 Dave, All rights reserved.\r
// (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r
// Free for non-commercial use.\r
\r
// For commercial use, separate licencing terms must be obtained.\r
\r
\r
#include "PicoInt.h"\r
#include "cd/gfx_cd.h"\r
\r
extern const unsigned char  hcounts_32[];\r
extern const unsigned char  hcounts_40[];\r
extern const unsigned short vcounts[];\r
extern int rendstatus;\r
\r
#ifndef UTYPES_DEFINED\r
typedef unsigned char  u8;\r
typedef unsigned short u16;\r
typedef unsigned int   u32;\r
#define UTYPES_DEFINED\r
#endif\r
\r
\r
static __inline void AutoIncrement(void)\r
{\r
  Pico.video.addr=(unsigned short)(Pico.video.addr+Pico.video.reg[0xf]);\r
}\r
\r
static void VideoWrite(u16 d)\r
{\r
  unsigned int a=Pico.video.addr;\r
\r
  switch (Pico.video.type)\r
  {\r
    case 1: if(a&1) d=(u16)((d<<8)|(d>>8)); // If address is odd, bytes are swapped (which game needs this?)\r
            Pico.vram [(a>>1)&0x7fff]=d;\r
            rendstatus|=0x10; break;\r
    case 3: Pico.m.dirtyPal = 1;\r
            Pico.cram [(a>>1)&0x003f]=d; break; // wraps (Desert Strike)\r
    case 5: Pico.vsram[(a>>1)&0x003f]=d; break;\r
    default:elprintf(EL_ANOMALY, "VDP write %04x with bad type %i", d, Pico.video.type); break;\r
  }\r
\r
  //dprintf("w[%i] @ %04x, inc=%i [%i|%i]", Pico.video.type, a, Pico.video.reg[0xf], Pico.m.scanline, SekCyclesDone());\r
  AutoIncrement();\r
}\r
\r
static unsigned int VideoRead(void)\r
{\r
  unsigned int a=0,d=0;\r
\r
  a=Pico.video.addr; a>>=1;\r
\r
  switch (Pico.video.type)\r
  {\r
    case 0: d=Pico.vram [a&0x7fff]; break;\r
    case 8: d=Pico.cram [a&0x003f]; break;\r
    case 4: d=Pico.vsram[a&0x003f]; break;\r
    default:elprintf(EL_ANOMALY, "VDP read with bad type %i", Pico.video.type); break;\r
  }\r
\r
  AutoIncrement();\r
  return d;\r
}\r
\r
static int GetDmaLength(void)\r
{\r
  struct PicoVideo *pvid=&Pico.video;\r
  int len=0;\r
  // 16-bit words to transfer:\r
  len =pvid->reg[0x13];\r
  len|=pvid->reg[0x14]<<8;\r
  // Charles MacDonald:\r
  if(!len) len = 0xffff;\r
  return len;\r
}\r
\r
static void DmaSlow(int len)\r
{\r
  u16 *pd=0, *pdend, *r;\r
  unsigned int a=Pico.video.addr, a2, d;\r
  unsigned char inc=Pico.video.reg[0xf];\r
  unsigned int source;\r
\r
  source =Pico.video.reg[0x15]<<1;\r
  source|=Pico.video.reg[0x16]<<9;\r
  source|=Pico.video.reg[0x17]<<17;\r
\r
  elprintf(EL_VDPDMA, "DmaSlow[%i] %06x->%04x len %i inc=%i blank %i [%i] @ %06x",\r
    Pico.video.type, source, a, len, inc, (Pico.video.status&8)||!(Pico.video.reg[1]&0x40),\r
    SekCyclesDone(), SekPc);\r
\r
  if(Pico.m.scanline != -1) {\r
    Pico.m.dma_xfers += len;\r
    if ((PicoMCD&1) && (PicoOpt & 0x2000)) SekCyclesBurn(CheckDMA());\r
    else SekSetCyclesLeftNoMCD(SekCyclesLeftNoMCD - CheckDMA());\r
  } else {\r
    // be approximate in non-accurate mode\r
    SekSetCyclesLeft(SekCyclesLeft - (len*(((488<<8)/167))>>8));\r
  }\r
\r
  if ((source&0xe00000)==0xe00000) { // Ram\r
    pd=(u16 *)(Pico.ram+(source&0xfffe));\r
    pdend=(u16 *)(Pico.ram+0x10000);\r
  } else if(PicoMCD & 1) {\r
    elprintf(EL_VDPDMA, "DmaSlow CD, r3=%02x", Pico_mcd->s68k_regs[3]);\r
    if(source<0x20000) { // Bios area\r
      pd=(u16 *)(Pico_mcd->bios+(source&~1));\r
      pdend=(u16 *)(Pico_mcd->bios+0x20000);\r
    } else if ((source&0xfc0000)==0x200000) { // Word Ram\r
      source -= 2;\r
      if (!(Pico_mcd->s68k_regs[3]&4)) { // 2M mode\r
        pd=(u16 *)(Pico_mcd->word_ram2M+(source&0x3fffe));\r
        pdend=(u16 *)(Pico_mcd->word_ram2M+0x40000);\r
      } else {\r
        if (source < 0x220000) { // 1M mode\r
          int bank = Pico_mcd->s68k_regs[3]&1;\r
          pd=(u16 *)(Pico_mcd->word_ram1M[bank]+(source&0x1fffe));\r
          pdend=(u16 *)(Pico_mcd->word_ram1M[bank]+0x20000);\r
        } else {\r
          DmaSlowCell(source, a, len, inc);\r
          return;\r
        }\r
      }\r
    } else if ((source&0xfe0000)==0x020000) { // Prg Ram\r
      u8 *prg_ram = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r
      pd=(u16 *)(prg_ram+(source&0x1fffe));\r
      pdend=(u16 *)(prg_ram+0x20000);\r
    } else {\r
      elprintf(EL_VDPDMA|EL_ANOMALY, "DmaSlow FIXME: unsupported src");\r
      return;\r
    }\r
  } else {\r
    if(source<Pico.romsize) { // Rom\r
      pd=(u16 *)(Pico.rom+(source&~1));\r
      pdend=(u16 *)(Pico.rom+Pico.romsize);\r
    } else {\r
      elprintf(EL_VDPDMA|EL_ANOMALY, "DmaSlow: invalid dma src");\r
      return;\r
    }\r
  }\r
\r
  // overflow protection, might break something..\r
  if (len > pdend - pd) {\r
    len = pdend - pd;\r
    elprintf(EL_VDPDMA|EL_ANOMALY, "DmaSlow overflow");\r
  }\r
\r
  switch (Pico.video.type)\r
  {\r
    case 1: // vram\r
      r = Pico.vram;\r
      if (inc == 2 && !(a&1) && a+len*2 < 0x10000)\r
      {\r
        // most used DMA mode\r
        memcpy16(r + (a>>1), pd, len);\r
        a += len*2;\r
      }\r
      else\r
      {\r
        for(; len; len--)\r
        {\r
          d=*pd++;\r
          if(a&1) d=(d<<8)|(d>>8);\r
          r[a>>1] = (u16)d; // will drop the upper bits\r
          // AutoIncrement\r
          a=(u16)(a+inc);\r
          // didn't src overlap?\r
          //if(pd >= pdend) pd-=0x8000; // should be good for RAM, bad for ROM\r
        }\r
      }\r
      rendstatus|=0x10;\r
      break;\r
\r
    case 3: // cram\r
      Pico.m.dirtyPal = 1;\r
      r = Pico.cram;\r
      for(a2=a&0x7f; len; len--)\r
      {\r
        r[a2>>1] = (u16)*pd++; // bit 0 is ignored\r
        // AutoIncrement\r
        a2+=inc;\r
        // didn't src overlap?\r
        //if(pd >= pdend) pd-=0x8000;\r
        // good dest?\r
        if(a2 >= 0x80) break; // Todds Adventures in Slime World / Andre Agassi tennis\r
      }\r
      a=(a&0xff00)|a2;\r
      break;\r
\r
    case 5: // vsram[a&0x003f]=d;\r
      r = Pico.vsram;\r
      for(a2=a&0x7f; len; len--)\r
      {\r
        r[a2>>1] = (u16)*pd++;\r
        // AutoIncrement\r
        a2+=inc;\r
        // didn't src overlap?\r
        //if(pd >= pdend) pd-=0x8000;\r
        // good dest?\r
        if(a2 >= 0x80) break;\r
      }\r
      a=(a&0xff00)|a2;\r
      break;\r
\r
    default:\r
      elprintf(EL_VDPDMA|EL_ANOMALY, "DMA with bad type %i", Pico.video.type);\r
      break;\r
  }\r
  // remember addr\r
  Pico.video.addr=(u16)a;\r
}\r
\r
static void DmaCopy(int len)\r
{\r
  u16 a=Pico.video.addr;\r
  unsigned char *vr = (unsigned char *) Pico.vram;\r
  unsigned char *vrs;\r
  unsigned char inc=Pico.video.reg[0xf];\r
  int source;\r
  elprintf(EL_VDPDMA, "DmaCopy len %i [%i]", len, SekCyclesDone());\r
\r
  Pico.m.dma_xfers += len;\r
  if(Pico.m.scanline != -1)\r
    Pico.video.status|=2; // dma busy\r
\r
  source =Pico.video.reg[0x15];\r
  source|=Pico.video.reg[0x16]<<8;\r
  vrs=vr+source;\r
\r
  if(source+len > 0x10000) len=0x10000-source; // clip??\r
\r
  for(;len;len--)\r
  {\r
    vr[a] = *vrs++;\r
    // AutoIncrement\r
    a=(u16)(a+inc);\r
  }\r
  // remember addr\r
  Pico.video.addr=a;\r
  rendstatus|=0x10;\r
}\r
\r
// check: Contra, Megaman\r
// note: this is still inaccurate\r
static void DmaFill(int data)\r
{\r
  int len;\r
  unsigned short a=Pico.video.addr;\r
  unsigned char *vr=(unsigned char *) Pico.vram;\r
  unsigned char high = (unsigned char) (data >> 8);\r
  unsigned char inc=Pico.video.reg[0xf];\r
\r
  len=GetDmaLength();\r
  elprintf(EL_VDPDMA, "DmaFill len %i inc %i [%i]", len, inc, SekCyclesDone());\r
\r
  Pico.m.dma_xfers += len;\r
  if(Pico.m.scanline != -1)\r
    Pico.video.status|=2; // dma busy (in accurate mode)\r
\r
  // from Charles MacDonald's genvdp.txt:\r
  // Write lower byte to address specified\r
  vr[a] = (unsigned char) data;\r
  a=(u16)(a+inc);\r
\r
  if(!inc) len=1;\r
\r
  for(;len;len--) {\r
    // Write upper byte to adjacent address\r
    // (here we are byteswapped, so address is already 'adjacent')\r
    vr[a] = high;\r
\r
    // Increment address register\r
    a=(u16)(a+inc);\r
  }\r
  // remember addr\r
  Pico.video.addr=a;\r
  // update length\r
  Pico.video.reg[0x13] = Pico.video.reg[0x14] = 0; // Dino Dini's Soccer (E) (by Haze)\r
\r
  rendstatus|=0x10;\r
}\r
\r
static void CommandDma(void)\r
{\r
  struct PicoVideo *pvid=&Pico.video;\r
  int len=0,method=0;\r
\r
  if ((pvid->reg[1]&0x10)==0) return; // DMA not enabled\r
\r
  len=GetDmaLength();\r
\r
  method=pvid->reg[0x17]>>6;\r
  if (method< 2) DmaSlow(len); // 68000 to VDP\r
  if (method==3) DmaCopy(len); // VRAM Copy\r
}\r
\r
static void CommandChange(void)\r
{\r
  struct PicoVideo *pvid=&Pico.video;\r
  unsigned int cmd=0,addr=0;\r
\r
  cmd=pvid->command;\r
\r
  // Get type of transfer 0xc0000030 (v/c/vsram read/write)\r
  pvid->type=(unsigned char)(((cmd>>2)&0xc)|(cmd>>30));\r
\r
  // Get address 0x3fff0003\r
  addr =(cmd>>16)&0x3fff;\r
  addr|=(cmd<<14)&0xc000;\r
  pvid->addr=(unsigned short)addr;\r
\r
  // Check for dma:\r
  if (cmd&0x80) CommandDma();\r
}\r
\r
PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)\r
{\r
  struct PicoVideo *pvid=&Pico.video;\r
\r
  a&=0x1c;\r
\r
  if (a==0x00) // Data port 0 or 2\r
  {\r
    if (pvid->pending) {\r
      CommandChange();\r
      pvid->pending=0;\r
    }\r
\r
    // If a DMA fill has been set up, do it\r
    if ((pvid->command&0x80) && (pvid->reg[1]&0x10) && (pvid->reg[0x17]>>6)==2)\r
    {\r
      DmaFill(d);\r
    }\r
    else\r
    {\r
      // preliminary FIFO emulation for Chaos Engine, The (E)\r
      if(!(pvid->status&8) && (pvid->reg[1]&0x40) && Pico.m.scanline!=-1 && !(PicoOpt&0x10000)) // active display, accurate mode?\r
      {\r
        pvid->status&=~0x200; // FIFO no longer empty\r
        pvid->lwrite_cnt++;\r
        if (pvid->lwrite_cnt >= 4) pvid->status|=0x100; // FIFO full\r
        if (pvid->lwrite_cnt >  4) {\r
          SekCyclesBurn(32); // penalty // 488/12-8\r
          if (SekCycleCnt>=SekCycleAim) SekEndRun(0);\r
        }\r
        elprintf(EL_ASVDP, "VDP data write: %04x {%i} #%i @ %06x", d, Pico.video.type, pvid->lwrite_cnt, SekPc);\r
      }\r
      VideoWrite(d);\r
    }\r
    return;\r
  }\r
\r
  if (a==0x04) // Control (command) port 4 or 6\r
  {\r
    if(pvid->pending)\r
    {\r
      // Low word of command:\r
      pvid->command&=0xffff0000;\r
      pvid->command|=d;\r
      pvid->pending=0;\r
      CommandChange();\r
    } else {\r
      if((d&0xc000)==0x8000)\r
      {\r
        // Register write:\r
        int num=(d>>8)&0x1f;\r
        if(num==00) elprintf(EL_INTSW, "hint_onoff: %i->%i [%i] pend=%i @ %06x", (pvid->reg[0]&0x10)>>4,\r
                        (d&0x10)>>4, SekCyclesDone(), (pvid->pending_ints&0x10)>>4, SekPc);\r
        if(num==01) elprintf(EL_INTSW, "vint_onoff: %i->%i [%i] pend=%i @ %06x", (pvid->reg[1]&0x20)>>5,\r
                        (d&0x20)>>5, SekCyclesDone(), (pvid->pending_ints&0x20)>>5, SekPc);\r
        //if(num==01) dprintf("set_blank: %i @ %06x [%i|%i]", !((d&0x40)>>6), SekPc, Pico.m.scanline, SekCyclesDone());\r
        //if(num==10) dprintf("hint_set: %i @ %06x [%i|%i]", (unsigned char)d, SekPc, Pico.m.scanline, SekCyclesDone());\r
        pvid->reg[num]=(unsigned char)d;\r
#if !(defined(EMU_C68K) && defined(EMU_M68K)) // not debugging Cyclone\r
        // update IRQ level (Lemmings, Wiz 'n' Liz intro, ... )\r
        // may break if done improperly:\r
        // International Superstar Soccer Deluxe (crash), Street Racer (logos), Burning Force (gfx),\r
        // Fatal Rewind (hang), Sesame Street Counting Cafe\r
        if(num < 2) {\r
#ifdef EMU_C68K\r
          // hack: make sure we do not touch the irq line if Cyclone is just about to take the IRQ\r
          if (PicoCpuCM68k.irq <= (PicoCpuCM68k.srh&7)) {\r
#endif\r
            int lines, pints;\r
            lines = (pvid->reg[1] & 0x20) | (pvid->reg[0] & 0x10);\r
            pints = (pvid->pending_ints&lines);\r
                 if(pints & 0x20) SekInterrupt(6);\r
            else if(pints & 0x10) SekInterrupt(4);\r
            else SekInterrupt(0);\r
#ifdef EMU_C68K\r
            // adjust cycles for Cyclone so it would take the int "in time"\r
            if(PicoCpuCM68k.irq) {\r
              SekEndRun(24);\r
            }\r
          }\r
#endif\r
        }\r
        else\r
#endif\r
        if(num == 5) rendstatus|=1;\r
        else if(num == 0xc) Pico.m.dirtyPal = 2; // renderers should update their palettes if sh/hi mode is changed\r
        pvid->type=0; // register writes clear command (else no Sega logo in Golden Axe II)\r
      } else {\r
        // High word of command:\r
        pvid->command&=0x0000ffff;\r
        pvid->command|=d<<16;\r
        pvid->pending=1;\r
      }\r
    }\r
  }\r
}\r
\r
PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)\r
{\r
  unsigned int d=0;\r
\r
  a&=0x1c;\r
\r
\r
  if (a==0x00) // data port\r
  {\r
    d=VideoRead();\r
    goto end;\r
  }\r
\r
  if (a==0x04) // control port\r
  {\r
    struct PicoVideo *pv=&Pico.video;\r
    d=pv->status;\r
    if (PicoOpt&0x10)         d|=0x0020; // sprite collision (Shadow of the Beast)\r
    if (!(pv->reg[1]&0x40))   d|=0x0008; // set V-Blank if display is disabled\r
    if (SekCyclesLeft < 84+4) d|=0x0004; // H-Blank (Sonic3 vs)\r
\r
    d|=(pv->pending_ints&0x20)<<2; // V-int pending?\r
    if (d&0x100) pv->status&=~0x100; // FIFO no longer full\r
\r
    pv->pending=0; // ctrl port reads clear write-pending flag (Charles MacDonald)\r
\r
    elprintf(EL_SR, "SR read: %04x @ %06x", d, SekPc);\r
    goto end;\r
  }\r
\r
  // H-counter info (based on Generator):\r
  // frame:\r
  //                       |       <- hblank? ->      |\r
  // start    <416>       hint  <36> hdisplay <38>  end // CPU cycles\r
  // |---------...---------|------------|-------------|\r
  // 0                   B6 E4                       FF // 40 cells\r
  // 0                   93 E8                       FF // 32 cells\r
\r
  // Gens (?)              v-render\r
  // start  <hblank=84>   hint    hdisplay <404>      |\r
  // |---------------------|--------------------------|\r
  // E4  (hc[0x43]==0)    07                         B1 // 40\r
  // E8  (hc[0x45]==0)    05                         91 // 32\r
\r
  // check: Sonic 3D Blast bonus, Cannon Fodder, Chase HQ II, 3 Ninjas kick back, Road Rash 3, Skitchin', Wheel of Fortune\r
  if ((a&0x1c)==0x08)\r
  {\r
    unsigned int hc;\r
\r
    if(Pico.m.scanline != -1) {\r
      int lineCycles=(488-SekCyclesLeft)&0x1ff;\r
      d=Pico.m.scanline; // V-Counter\r
\r
      if(Pico.video.reg[12]&1)\r
           hc=hcounts_40[lineCycles];\r
      else hc=hcounts_32[lineCycles];\r
\r
      //if(lineCycles > 488-12) d++; // Wheel of Fortune\r
    } else {\r
      // get approximate V-Counter\r
      d=vcounts[SekCyclesDone()>>8];\r
      hc = Pico.m.rotate&0xff;\r
    }\r
\r
    if(Pico.m.pal) {\r
      if(d >= 0x103) d-=56; // based on Gens\r
    } else {\r
      if(d >= 0xEB)  d-=6;\r
    }\r
\r
    if((Pico.video.reg[12]&6) == 6) {\r
      // interlace mode 2 (Combat Cars (UE) [!])\r
      d <<= 1;\r
      if (d&0xf00) d|= 1;\r
    }\r
\r
    elprintf(EL_HVCNT, "hv: %02x %02x (%i) @ %06x", hc, d, SekCyclesDone(), SekPc);\r
    d&=0xff; d<<=8;\r
    d|=hc;\r
    goto end;\r
  }\r
\r
end:\r
\r
  return d;\r
}\r
Commit	Line	Data
cc68a136	1	// This is part of Pico Library\r
	2	\r
	3	// (c) Copyright 2004 Dave, All rights reserved.\r
6cadc2da	4	// (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r
cc68a136	5	// Free for non-commercial use.\r
	6	\r
	7	// For commercial use, separate licencing terms must be obtained.\r
	8	\r
	9	\r
	10	#include "PicoInt.h"\r
fa1e5e29	11	#include "cd/gfx_cd.h"\r
cc68a136	12	\r
	13	extern const unsigned char hcounts_32[];\r
	14	extern const unsigned char hcounts_40[];\r
	15	extern const unsigned short vcounts[];\r
	16	extern int rendstatus;\r
	17	\r
eff55556	18	#ifndef UTYPES_DEFINED\r
ab0607f7	19	typedef unsigned char u8;\r
cc68a136	20	typedef unsigned short u16;\r
eff55556	21	typedef unsigned int u32;\r
	22	#define UTYPES_DEFINED\r
	23	#endif\r
cc68a136	24	\r
cc68a136	25	\r
69996cb7	26	static __inline void AutoIncrement(void)\r
cc68a136	27	{\r
	28	Pico.video.addr=(unsigned short)(Pico.video.addr+Pico.video.reg[0xf]);\r
	29	}\r
	30	\r
	31	static void VideoWrite(u16 d)\r
	32	{\r
	33	unsigned int a=Pico.video.addr;\r
	34	\r
	35	switch (Pico.video.type)\r
	36	{\r
	37	case 1: if(a&1) d=(u16)((d<<8)\|(d>>8)); // If address is odd, bytes are swapped (which game needs this?)\r
	38	Pico.vram [(a>>1)&0x7fff]=d;\r
	39	rendstatus\|=0x10; break;\r
	40	case 3: Pico.m.dirtyPal = 1;\r
cc68a136	41	Pico.cram [(a>>1)&0x003f]=d; break; // wraps (Desert Strike)\r
cc68a136	42	case 5: Pico.vsram[(a>>1)&0x003f]=d; break;\r
69996cb7	43	default:elprintf(EL_ANOMALY, "VDP write %04x with bad type %i", d, Pico.video.type); break;\r
cc68a136	44	}\r
	45	\r
	46	//dprintf("w[%i] @ %04x, inc=%i [%i\|%i]", Pico.video.type, a, Pico.video.reg[0xf], Pico.m.scanline, SekCyclesDone());\r
	47	AutoIncrement();\r
	48	}\r
	49	\r
69996cb7	50	static unsigned int VideoRead(void)\r
cc68a136	51	{\r
	52	unsigned int a=0,d=0;\r
	53	\r
	54	a=Pico.video.addr; a>>=1;\r
	55	\r
	56	switch (Pico.video.type)\r
	57	{\r
	58	case 0: d=Pico.vram [a&0x7fff]; break;\r
	59	case 8: d=Pico.cram [a&0x003f]; break;\r
	60	case 4: d=Pico.vsram[a&0x003f]; break;\r
69996cb7	61	default:elprintf(EL_ANOMALY, "VDP read with bad type %i", Pico.video.type); break;\r
cc68a136	62	}\r
4f672280	63	\r
cc68a136	64	AutoIncrement();\r
	65	return d;\r
	66	}\r
	67	\r
69996cb7	68	static int GetDmaLength(void)\r
cc68a136	69	{\r
	70	struct PicoVideo *pvid=&Pico.video;\r
	71	int len=0;\r
	72	// 16-bit words to transfer:\r
	73	len =pvid->reg[0x13];\r
	74	len\|=pvid->reg[0x14]<<8;\r
	75	// Charles MacDonald:\r
	76	if(!len) len = 0xffff;\r
	77	return len;\r
	78	}\r
	79	\r
	80	static void DmaSlow(int len)\r
	81	{\r
	82	u16 pd=0, pdend, *r;\r
	83	unsigned int a=Pico.video.addr, a2, d;\r
	84	unsigned char inc=Pico.video.reg[0xf];\r
672ad671	85	unsigned int source;\r
cc68a136	86	\r
	87	source =Pico.video.reg[0x15]<<1;\r
	88	source\|=Pico.video.reg[0x16]<<9;\r
	89	source\|=Pico.video.reg[0x17]<<17;\r
	90	\r
69996cb7	91	elprintf(EL_VDPDMA, "DmaSlow[%i] %06x->%04x len %i inc=%i blank %i [%i] @ %06x",\r
312e9ce1	92	Pico.video.type, source, a, len, inc, (Pico.video.status&8)\|\|!(Pico.video.reg[1]&0x40),\r
69996cb7	93	SekCyclesDone(), SekPc);\r
cc68a136	94	\r
672ad671	95	if(Pico.m.scanline != -1) {\r
69996cb7	96	Pico.m.dma_xfers += len;\r
2d0b15bb	97	if ((PicoMCD&1) && (PicoOpt & 0x2000)) SekCyclesBurn(CheckDMA());\r
7336a99a	98	else SekSetCyclesLeftNoMCD(SekCyclesLeftNoMCD - CheckDMA());\r
672ad671	99	} else {\r
	100	// be approximate in non-accurate mode\r
	101	SekSetCyclesLeft(SekCyclesLeft - (len*(((488<<8)/167))>>8));\r
	102	}\r
	103	\r
ab0607f7	104	if ((source&0xe00000)==0xe00000) { // Ram\r
	105	pd=(u16 *)(Pico.ram+(source&0xfffe));\r
	106	pdend=(u16 *)(Pico.ram+0x10000);\r
	107	} else if(PicoMCD & 1) {\r
69996cb7	108	elprintf(EL_VDPDMA, "DmaSlow CD, r3=%02x", Pico_mcd->s68k_regs[3]);\r
ab0607f7	109	if(source<0x20000) { // Bios area\r
	110	pd=(u16 *)(Pico_mcd->bios+(source&~1));\r
	111	pdend=(u16 *)(Pico_mcd->bios+0x20000);\r
fa1e5e29	112	} else if ((source&0xfc0000)==0x200000) { // Word Ram\r
fa1e5e29	113	source -= 2;\r
ab0607f7	114	if (!(Pico_mcd->s68k_regs[3]&4)) { // 2M mode\r
fa1e5e29	115	pd=(u16 *)(Pico_mcd->word_ram2M+(source&0x3fffe));\r
fa1e5e29	116	pdend=(u16 *)(Pico_mcd->word_ram2M+0x40000);\r
ab0607f7	117	} else {\r
fa1e5e29	118	if (source < 0x220000) { // 1M mode\r
	119	int bank = Pico_mcd->s68k_regs[3]&1;\r
	120	pd=(u16 *)(Pico_mcd->word_ram1M[bank]+(source&0x1fffe));\r
	121	pdend=(u16 *)(Pico_mcd->word_ram1M[bank]+0x20000);\r
69996cb7	122	} else {\r
fa1e5e29	123	DmaSlowCell(source, a, len, inc);\r
fa1e5e29	124	return;\r
69996cb7	125	}\r
ab0607f7	126	}\r
	127	} else if ((source&0xfe0000)==0x020000) { // Prg Ram\r
	128	u8 *prg_ram = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];\r
	129	pd=(u16 *)(prg_ram+(source&0x1fffe));\r
	130	pdend=(u16 *)(prg_ram+0x20000);\r
	131	} else {\r
69996cb7	132	elprintf(EL_VDPDMA\|EL_ANOMALY, "DmaSlow FIXME: unsupported src");\r
ab0607f7	133	return;\r
ab0607f7	134	}\r
672ad671	135	} else {\r
ab0607f7	136	if(source<Pico.romsize) { // Rom\r
	137	pd=(u16 *)(Pico.rom+(source&~1));\r
	138	pdend=(u16 *)(Pico.rom+Pico.romsize);\r
	139	} else {\r
69996cb7	140	elprintf(EL_VDPDMA\|EL_ANOMALY, "DmaSlow: invalid dma src");\r
ab0607f7	141	return;\r
	142	}\r
	143	}\r
	144	\r
	145	// overflow protection, might break something..\r
	146	if (len > pdend - pd) {\r
	147	len = pdend - pd;\r
69996cb7	148	elprintf(EL_VDPDMA\|EL_ANOMALY, "DmaSlow overflow");\r
672ad671	149	}\r
cc68a136	150	\r
	151	switch (Pico.video.type)\r
	152	{\r
	153	case 1: // vram\r
	154	r = Pico.vram;\r
cea65903	155	if (inc == 2 && !(a&1) && a+len*2 < 0x10000)\r
cc68a136	156	{\r
cea65903	157	// most used DMA mode\r
fa1e5e29	158	memcpy16(r + (a>>1), pd, len);\r
fa1e5e29	159	a += len*2;\r
cea65903	160	}\r
	161	else\r
	162	{\r
	163	for(; len; len--)\r
	164	{\r
	165	d=*pd++;\r
	166	if(a&1) d=(d<<8)\|(d>>8);\r
	167	r[a>>1] = (u16)d; // will drop the upper bits\r
	168	// AutoIncrement\r
	169	a=(u16)(a+inc);\r
	170	// didn't src overlap?\r
	171	//if(pd >= pdend) pd-=0x8000; // should be good for RAM, bad for ROM\r
	172	}\r
cc68a136	173	}\r
	174	rendstatus\|=0x10;\r
	175	break;\r
4f672280	176	\r
cc68a136	177	case 3: // cram\r
cc68a136	178	Pico.m.dirtyPal = 1;\r
	179	r = Pico.cram;\r
	180	for(a2=a&0x7f; len; len--)\r
	181	{\r
0a051f55	182	r[a2>>1] = (u16)*pd++; // bit 0 is ignored\r
cc68a136	183	// AutoIncrement\r
	184	a2+=inc;\r
	185	// didn't src overlap?\r
ab0607f7	186	//if(pd >= pdend) pd-=0x8000;\r
cc68a136	187	// good dest?\r
	188	if(a2 >= 0x80) break; // Todds Adventures in Slime World / Andre Agassi tennis\r
	189	}\r
	190	a=(a&0xff00)\|a2;\r
	191	break;\r
	192	\r
	193	case 5: // vsram[a&0x003f]=d;\r
	194	r = Pico.vsram;\r
	195	for(a2=a&0x7f; len; len--)\r
	196	{\r
	197	r[a2>>1] = (u16)*pd++;\r
	198	// AutoIncrement\r
	199	a2+=inc;\r
	200	// didn't src overlap?\r
ab0607f7	201	//if(pd >= pdend) pd-=0x8000;\r
cc68a136	202	// good dest?\r
	203	if(a2 >= 0x80) break;\r
	204	}\r
	205	a=(a&0xff00)\|a2;\r
	206	break;\r
69996cb7	207	\r
	208	default:\r
	209	elprintf(EL_VDPDMA\|EL_ANOMALY, "DMA with bad type %i", Pico.video.type);\r
	210	break;\r
cc68a136	211	}\r
	212	// remember addr\r
	213	Pico.video.addr=(u16)a;\r
	214	}\r
	215	\r
	216	static void DmaCopy(int len)\r
	217	{\r
	218	u16 a=Pico.video.addr;\r
	219	unsigned char vr = (unsigned char ) Pico.vram;\r
	220	unsigned char *vrs;\r
	221	unsigned char inc=Pico.video.reg[0xf];\r
	222	int source;\r
69996cb7	223	elprintf(EL_VDPDMA, "DmaCopy len %i [%i]", len, SekCyclesDone());\r
4f672280	224	\r
69996cb7	225	Pico.m.dma_xfers += len;\r
8c1952f0	226	if(Pico.m.scanline != -1)\r
8c1952f0	227	Pico.video.status\|=2; // dma busy\r
cc68a136	228	\r
	229	source =Pico.video.reg[0x15];\r
	230	source\|=Pico.video.reg[0x16]<<8;\r
	231	vrs=vr+source;\r
	232	\r
	233	if(source+len > 0x10000) len=0x10000-source; // clip??\r
	234	\r
	235	for(;len;len--)\r
	236	{\r
	237	vr[a] = *vrs++;\r
	238	// AutoIncrement\r
	239	a=(u16)(a+inc);\r
	240	}\r
	241	// remember addr\r
	242	Pico.video.addr=a;\r
	243	rendstatus\|=0x10;\r
	244	}\r
	245	\r
	246	// check: Contra, Megaman\r
	247	// note: this is still inaccurate\r
	248	static void DmaFill(int data)\r
	249	{\r
	250	int len;\r
	251	unsigned short a=Pico.video.addr;\r
	252	unsigned char vr=(unsigned char ) Pico.vram;\r
	253	unsigned char high = (unsigned char) (data >> 8);\r
	254	unsigned char inc=Pico.video.reg[0xf];\r
4f672280	255	\r
cc68a136	256	len=GetDmaLength();\r
69996cb7	257	elprintf(EL_VDPDMA, "DmaFill len %i inc %i [%i]", len, inc, SekCyclesDone());\r
4f672280	258	\r
69996cb7	259	Pico.m.dma_xfers += len;\r
8c1952f0	260	if(Pico.m.scanline != -1)\r
8c1952f0	261	Pico.video.status\|=2; // dma busy (in accurate mode)\r
cc68a136	262	\r
	263	// from Charles MacDonald's genvdp.txt:\r
	264	// Write lower byte to address specified\r
	265	vr[a] = (unsigned char) data;\r
	266	a=(u16)(a+inc);\r
	267	\r
	268	if(!inc) len=1;\r
	269	\r
	270	for(;len;len--) {\r
	271	// Write upper byte to adjacent address\r
	272	// (here we are byteswapped, so address is already 'adjacent')\r
	273	vr[a] = high;\r
	274	\r
	275	// Increment address register\r
	276	a=(u16)(a+inc);\r
	277	}\r
	278	// remember addr\r
	279	Pico.video.addr=a;\r
	280	// update length\r
	281	Pico.video.reg[0x13] = Pico.video.reg[0x14] = 0; // Dino Dini's Soccer (E) (by Haze)\r
	282	\r
	283	rendstatus\|=0x10;\r
	284	}\r
	285	\r
69996cb7	286	static void CommandDma(void)\r
cc68a136	287	{\r
	288	struct PicoVideo *pvid=&Pico.video;\r
	289	int len=0,method=0;\r
	290	\r
	291	if ((pvid->reg[1]&0x10)==0) return; // DMA not enabled\r
	292	\r
	293	len=GetDmaLength();\r
	294	\r
	295	method=pvid->reg[0x17]>>6;\r
	296	if (method< 2) DmaSlow(len); // 68000 to VDP\r
	297	if (method==3) DmaCopy(len); // VRAM Copy\r
	298	}\r
	299	\r
69996cb7	300	static void CommandChange(void)\r
cc68a136	301	{\r
	302	struct PicoVideo *pvid=&Pico.video;\r
	303	unsigned int cmd=0,addr=0;\r
	304	\r
	305	cmd=pvid->command;\r
	306	\r
	307	// Get type of transfer 0xc0000030 (v/c/vsram read/write)\r
	308	pvid->type=(unsigned char)(((cmd>>2)&0xc)\|(cmd>>30));\r
	309	\r
	310	// Get address 0x3fff0003\r
	311	addr =(cmd>>16)&0x3fff;\r
	312	addr\|=(cmd<<14)&0xc000;\r
	313	pvid->addr=(unsigned short)addr;\r
cc68a136	314	\r
	315	// Check for dma:\r
	316	if (cmd&0x80) CommandDma();\r
	317	}\r
	318	\r
eff55556	319	PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)\r
cc68a136	320	{\r
	321	struct PicoVideo *pvid=&Pico.video;\r
	322	\r
	323	a&=0x1c;\r
	324	\r
	325	if (a==0x00) // Data port 0 or 2\r
4f672280	326	{\r
69996cb7	327	if (pvid->pending) {\r
	328	CommandChange();\r
	329	pvid->pending=0;\r
	330	}\r
cc68a136	331	\r
	332	// If a DMA fill has been set up, do it\r
	333	if ((pvid->command&0x80) && (pvid->reg[1]&0x10) && (pvid->reg[0x17]>>6)==2)\r
	334	{\r
	335	DmaFill(d);\r
	336	}\r
	337	else\r
	338	{\r
69996cb7	339	// preliminary FIFO emulation for Chaos Engine, The (E)\r
1dceadae	340	if(!(pvid->status&8) && (pvid->reg[1]&0x40) && Pico.m.scanline!=-1 && !(PicoOpt&0x10000)) // active display, accurate mode?\r
69996cb7	341	{\r
	342	pvid->status&=~0x200; // FIFO no longer empty\r
	343	pvid->lwrite_cnt++;\r
	344	if (pvid->lwrite_cnt >= 4) pvid->status\|=0x100; // FIFO full\r
	345	if (pvid->lwrite_cnt > 4) {\r
	346	SekCyclesBurn(32); // penalty // 488/12-8\r
	347	if (SekCycleCnt>=SekCycleAim) SekEndRun(0);\r
	348	}\r
	349	elprintf(EL_ASVDP, "VDP data write: %04x {%i} #%i @ %06x", d, Pico.video.type, pvid->lwrite_cnt, SekPc);\r
	350	}\r
cc68a136	351	VideoWrite(d);\r
	352	}\r
	353	return;\r
	354	}\r
	355	\r
	356	if (a==0x04) // Control (command) port 4 or 6\r
	357	{\r
cc68a136	358	if(pvid->pending)\r
	359	{\r
	360	// Low word of command:\r
	361	pvid->command&=0xffff0000;\r
	362	pvid->command\|=d;\r
	363	pvid->pending=0;\r
	364	CommandChange();\r
	365	} else {\r
	366	if((d&0xc000)==0x8000)\r
	367	{\r
	368	// Register write:\r
	369	int num=(d>>8)&0x1f;\r
69996cb7	370	if(num==00) elprintf(EL_INTSW, "hint_onoff: %i->%i [%i] pend=%i @ %06x", (pvid->reg[0]&0x10)>>4,\r
	371	(d&0x10)>>4, SekCyclesDone(), (pvid->pending_ints&0x10)>>4, SekPc);\r
	372	if(num==01) elprintf(EL_INTSW, "vint_onoff: %i->%i [%i] pend=%i @ %06x", (pvid->reg[1]&0x20)>>5,\r
	373	(d&0x20)>>5, SekCyclesDone(), (pvid->pending_ints&0x20)>>5, SekPc);\r
cc68a136	374	//if(num==01) dprintf("set_blank: %i @ %06x [%i\|%i]", !((d&0x40)>>6), SekPc, Pico.m.scanline, SekCyclesDone());\r
cc68a136	375	//if(num==10) dprintf("hint_set: %i @ %06x [%i\|%i]", (unsigned char)d, SekPc, Pico.m.scanline, SekCyclesDone());\r
	376	pvid->reg[num]=(unsigned char)d;\r
	377	#if !(defined(EMU_C68K) && defined(EMU_M68K)) // not debugging Cyclone\r
	378	// update IRQ level (Lemmings, Wiz 'n' Liz intro, ... )\r
	379	// may break if done improperly:\r
69996cb7	380	// International Superstar Soccer Deluxe (crash), Street Racer (logos), Burning Force (gfx),\r
69996cb7	381	// Fatal Rewind (hang), Sesame Street Counting Cafe\r
cc68a136	382	if(num < 2) {\r
	383	#ifdef EMU_C68K\r
	384	// hack: make sure we do not touch the irq line if Cyclone is just about to take the IRQ\r
3aa1e148	385	if (PicoCpuCM68k.irq <= (PicoCpuCM68k.srh&7)) {\r
cc68a136	386	#endif\r
	387	int lines, pints;\r
	388	lines = (pvid->reg[1] & 0x20) \| (pvid->reg[0] & 0x10);\r
	389	pints = (pvid->pending_ints&lines);\r
	390	if(pints & 0x20) SekInterrupt(6);\r
	391	else if(pints & 0x10) SekInterrupt(4);\r
	392	else SekInterrupt(0);\r
	393	#ifdef EMU_C68K\r
	394	// adjust cycles for Cyclone so it would take the int "in time"\r
3aa1e148	395	if(PicoCpuCM68k.irq) {\r
cc68a136	396	SekEndRun(24);\r
	397	}\r
	398	}\r
	399	#endif\r
	400	}\r
	401	else\r
	402	#endif\r
	403	if(num == 5) rendstatus\|=1;\r
	404	else if(num == 0xc) Pico.m.dirtyPal = 2; // renderers should update their palettes if sh/hi mode is changed\r
	405	pvid->type=0; // register writes clear command (else no Sega logo in Golden Axe II)\r
	406	} else {\r
	407	// High word of command:\r
	408	pvid->command&=0x0000ffff;\r
	409	pvid->command\|=d<<16;\r
	410	pvid->pending=1;\r
	411	}\r
	412	}\r
	413	}\r
	414	}\r
	415	\r
eff55556	416	PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)\r
cc68a136	417	{\r
cc68a136	418	unsigned int d=0;\r
4f672280	419	\r
cc68a136	420	a&=0x1c;\r
cc68a136	421	\r
69996cb7	422	\r
cc68a136	423	if (a==0x00) // data port\r
	424	{\r
	425	d=VideoRead();\r
	426	goto end;\r
	427	}\r
	428	\r
	429	if (a==0x04) // control port\r
	430	{\r
69996cb7	431	struct PicoVideo *pv=&Pico.video;\r
	432	d=pv->status;\r
	433	if (PicoOpt&0x10) d\|=0x0020; // sprite collision (Shadow of the Beast)\r
	434	if (!(pv->reg[1]&0x40)) d\|=0x0008; // set V-Blank if display is disabled\r
	435	if (SekCyclesLeft < 84+4) d\|=0x0004; // H-Blank (Sonic3 vs)\r
	436	\r
	437	d\|=(pv->pending_ints&0x20)<<2; // V-int pending?\r
	438	if (d&0x100) pv->status&=~0x100; // FIFO no longer full\r
cc68a136	439	\r
69996cb7	440	pv->pending=0; // ctrl port reads clear write-pending flag (Charles MacDonald)\r
cc68a136	441	\r
69996cb7	442	elprintf(EL_SR, "SR read: %04x @ %06x", d, SekPc);\r
cc68a136	443	goto end;\r
	444	}\r
	445	\r
	446	// H-counter info (based on Generator):\r
	447	// frame:\r
	448	// \| <- hblank? -> \|\r
	449	// start <416> hint <36> hdisplay <38> end // CPU cycles\r
	450	// \|---------...---------\|------------\|-------------\|\r
	451	// 0 B6 E4 FF // 40 cells\r
	452	// 0 93 E8 FF // 32 cells\r
	453	\r
	454	// Gens (?) v-render\r
	455	// start <hblank=84> hint hdisplay <404> \|\r
	456	// \|---------------------\|--------------------------\|\r
	457	// E4 (hc[0x43]==0) 07 B1 // 40\r
	458	// E8 (hc[0x45]==0) 05 91 // 32\r
4f672280	459	\r
cc68a136	460	// check: Sonic 3D Blast bonus, Cannon Fodder, Chase HQ II, 3 Ninjas kick back, Road Rash 3, Skitchin', Wheel of Fortune\r
	461	if ((a&0x1c)==0x08)\r
	462	{\r
	463	unsigned int hc;\r
	464	\r
	465	if(Pico.m.scanline != -1) {\r
	466	int lineCycles=(488-SekCyclesLeft)&0x1ff;\r
	467	d=Pico.m.scanline; // V-Counter\r
	468	\r
	469	if(Pico.video.reg[12]&1)\r
	470	hc=hcounts_40[lineCycles];\r
	471	else hc=hcounts_32[lineCycles];\r
	472	\r
8c1952f0	473	//if(lineCycles > 488-12) d++; // Wheel of Fortune\r
cc68a136	474	} else {\r
	475	// get approximate V-Counter\r
	476	d=vcounts[SekCyclesDone()>>8];\r
	477	hc = Pico.m.rotate&0xff;\r
	478	}\r
	479	\r
	480	if(Pico.m.pal) {\r
	481	if(d >= 0x103) d-=56; // based on Gens\r
	482	} else {\r
	483	if(d >= 0xEB) d-=6;\r
	484	}\r
	485	\r
	486	if((Pico.video.reg[12]&6) == 6) {\r
	487	// interlace mode 2 (Combat Cars (UE) [!])\r
	488	d <<= 1;\r
	489	if (d&0xf00) d\|= 1;\r
	490	}\r
	491	\r
69996cb7	492	elprintf(EL_HVCNT, "hv: %02x %02x (%i) @ %06x", hc, d, SekCyclesDone(), SekPc);\r
cc68a136	493	d&=0xff; d<<=8;\r
	494	d\|=hc;\r
	495	goto end;\r
	496	}\r
	497	\r
	498	end:\r
	499	\r
	500	return d;\r
	501	}\r