snes9xgx/source/snes9x/dsp3emu.c.inc

/**********************************************************************************
  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.

  (c) Copyright 1996 - 2002  Gary Henderson (gary.henderson@ntlworld.com) and
                             Jerremy Koot (jkoot@snes9x.com)

  (c) Copyright 2002 - 2004  Matthew Kendora

  (c) Copyright 2002 - 2005  Peter Bortas (peter@bortas.org)

  (c) Copyright 2004 - 2005  Joel Yliluoma (http://iki.fi/bisqwit/)

  (c) Copyright 2001 - 2006  John Weidman (jweidman@slip.net)

  (c) Copyright 2002 - 2006  Brad Jorsch (anomie@users.sourceforge.net),
                             funkyass (funkyass@spam.shaw.ca),
                             Kris Bleakley (codeviolation@hotmail.com),
                             Nach (n-a-c-h@users.sourceforge.net), and
                             zones (kasumitokoduck@yahoo.com)

  BS-X C emulator code
  (c) Copyright 2005 - 2006  Dreamer Nom,
                             zones

  C4 x86 assembler and some C emulation code
  (c) Copyright 2000 - 2003  _Demo_ (_demo_@zsnes.com),
                             Nach,
                             zsKnight (zsknight@zsnes.com)

  C4 C++ code
  (c) Copyright 2003 - 2006  Brad Jorsch,
                             Nach

  DSP-1 emulator code
  (c) Copyright 1998 - 2006  _Demo_,
                             Andreas Naive (andreasnaive@gmail.com)
                             Gary Henderson,
                             Ivar (ivar@snes9x.com),
                             John Weidman,
                             Kris Bleakley,
                             Matthew Kendora,
                             Nach,
                             neviksti (neviksti@hotmail.com)

  DSP-2 emulator code
  (c) Copyright 2003         John Weidman,
                             Kris Bleakley,
                             Lord Nightmare (lord_nightmare@users.sourceforge.net),
                             Matthew Kendora,
                             neviksti


  DSP-3 emulator code
  (c) Copyright 2003 - 2006  John Weidman,
                             Kris Bleakley,
                             Lancer,
                             z80 gaiden

  DSP-4 emulator code
  (c) Copyright 2004 - 2006  Dreamer Nom,
                             John Weidman,
                             Kris Bleakley,
                             Nach,
                             z80 gaiden

  OBC1 emulator code
  (c) Copyright 2001 - 2004  zsKnight,
                             pagefault (pagefault@zsnes.com),
                             Kris Bleakley,
                             Ported from x86 assembler to C by sanmaiwashi

  SPC7110 and RTC C++ emulator code
  (c) Copyright 2002         Matthew Kendora with research by
                             zsKnight,
                             John Weidman,
                             Dark Force

  S-DD1 C emulator code
  (c) Copyright 2003         Brad Jorsch with research by
                             Andreas Naive,
                             John Weidman

  S-RTC C emulator code
  (c) Copyright 2001-2006    byuu,
                             John Weidman

  ST010 C++ emulator code
  (c) Copyright 2003         Feather,
                             John Weidman,
                             Kris Bleakley,
                             Matthew Kendora

  Super FX x86 assembler emulator code
  (c) Copyright 1998 - 2003  _Demo_,
                             pagefault,
                             zsKnight,

  Super FX C emulator code
  (c) Copyright 1997 - 1999  Ivar,
                             Gary Henderson,
                             John Weidman

  Sound DSP emulator code is derived from SNEeSe and OpenSPC:
  (c) Copyright 1998 - 2003  Brad Martin
  (c) Copyright 1998 - 2006  Charles Bilyue'

  SH assembler code partly based on x86 assembler code
  (c) Copyright 2002 - 2004  Marcus Comstedt (marcus@mc.pp.se)

  2xSaI filter
  (c) Copyright 1999 - 2001  Derek Liauw Kie Fa

  HQ2x filter
  (c) Copyright 2003         Maxim Stepin (maxim@hiend3d.com)

  Specific ports contains the works of other authors. See headers in
  individual files.

  Snes9x homepage: http://www.snes9x.com

  Permission to use, copy, modify and/or distribute Snes9x in both binary
  and source form, for non-commercial purposes, is hereby granted without 
  fee, providing that this license information and copyright notice appear 
  with all copies and any derived work.

  This software is provided 'as-is', without any express or implied
  warranty. In no event shall the authors be held liable for any damages
  arising from the use of this software or it's derivatives.

  Snes9x is freeware for PERSONAL USE only. Commercial users should
  seek permission of the copyright holders first. Commercial use includes,
  but is not limited to, charging money for Snes9x or software derived from
  Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
  using Snes9x as a promotion for your commercial product.

  The copyright holders request that bug fixes and improvements to the code
  should be forwarded to them so everyone can benefit from the modifications
  in future versions.

  Super NES and Super Nintendo Entertainment System are trademarks of
  Nintendo Co., Limited and its subsidiary companies.
**********************************************************************************/


#ifndef __cplusplus
//C++ in C
typedef unsigned char bool;
#define true 1
#define false 0
#endif

uint16 DSP3_DataROM[1024] = {
	0x8000, 0x4000, 0x2000, 0x1000, 0x0800, 0x0400, 0x0200, 0x0100,
	0x0080, 0x0040, 0x0020, 0x0010, 0x0008, 0x0004, 0x0002, 0x0001,
	0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080, 0x0100,
	0x0000, 0x000f, 0x0400, 0x0200, 0x0140, 0x0400, 0x0200, 0x0040,
	0x007d, 0x007e, 0x007e, 0x007b, 0x007c, 0x007d, 0x007b, 0x007c,
	0x0002, 0x0020, 0x0030, 0x0000, 0x000d, 0x0019, 0x0026, 0x0032,
	0x003e, 0x004a, 0x0056, 0x0062, 0x006d, 0x0079, 0x0084, 0x008e,
	0x0098, 0x00a2, 0x00ac, 0x00b5, 0x00be, 0x00c6, 0x00ce, 0x00d5,
	0x00dc, 0x00e2, 0x00e7, 0x00ec, 0x00f1, 0x00f5, 0x00f8, 0x00fb,
	0x00fd, 0x00ff, 0x0100, 0x0100, 0x0100, 0x00ff, 0x00fd, 0x00fb,
	0x00f8, 0x00f5, 0x00f1, 0x00ed, 0x00e7, 0x00e2, 0x00dc, 0x00d5,
	0x00ce, 0x00c6, 0x00be, 0x00b5, 0x00ac, 0x00a2, 0x0099, 0x008e,
	0x0084, 0x0079, 0x006e, 0x0062, 0x0056, 0x004a, 0x003e, 0x0032,
	0x0026, 0x0019, 0x000d, 0x0000, 0xfff3, 0xffe7, 0xffdb, 0xffce,
	0xffc2, 0xffb6, 0xffaa, 0xff9e, 0xff93, 0xff87, 0xff7d, 0xff72,
	0xff68, 0xff5e, 0xff54, 0xff4b, 0xff42, 0xff3a, 0xff32, 0xff2b,
	0xff25, 0xff1e, 0xff19, 0xff14, 0xff0f, 0xff0b, 0xff08, 0xff05,
	0xff03, 0xff01, 0xff00, 0xff00, 0xff00, 0xff01, 0xff03, 0xff05,
	0xff08, 0xff0b, 0xff0f, 0xff13, 0xff18, 0xff1e, 0xff24, 0xff2b,
	0xff32, 0xff3a, 0xff42, 0xff4b, 0xff54, 0xff5d, 0xff67, 0xff72,
	0xff7c, 0xff87, 0xff92, 0xff9e, 0xffa9, 0xffb5, 0xffc2, 0xffce,
	0xffda, 0xffe7, 0xfff3, 0x002b, 0x007f, 0x0020, 0x00ff, 0xff00,
	0xffbe, 0x0000, 0x0044, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xffc1, 0x0001, 0x0002, 0x0045,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffc5, 0x0003, 0x0004, 0x0005, 0x0047, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xffca, 0x0006, 0x0007, 0x0008,
	0x0009, 0x004a, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffd0, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x004e, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xffd7, 0x000f, 0x0010, 0x0011,
	0x0012, 0x0013, 0x0014, 0x0053, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffdf, 0x0015, 0x0016, 0x0017, 0x0018, 0x0019, 0x001a, 0x001b,
	0x0059, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xffe8, 0x001c, 0x001d, 0x001e,
	0x001f, 0x0020, 0x0021, 0x0022, 0x0023, 0x0060, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xfff2, 0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a,
	0x002b, 0x002c, 0x0068, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xfffd, 0x002d, 0x002e, 0x002f,
	0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0071,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffc7, 0x0037, 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d,
	0x003e, 0x003f, 0x0040, 0x0041, 0x007b, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xffd4, 0x0000, 0x0001, 0x0002,
	0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000a,
	0x000b, 0x0044, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffe2, 0x000c, 0x000d, 0x000e, 0x000f, 0x0010, 0x0011, 0x0012,
	0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 0x0018, 0x0050, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xfff1, 0x0019, 0x001a, 0x001b,
	0x001c, 0x001d, 0x001e, 0x001f, 0x0020, 0x0021, 0x0022, 0x0023,
	0x0024, 0x0025, 0x0026, 0x005d, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffcb, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d,
	0x002e, 0x002f, 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035,
	0x006b, 0x0000, 0x0000, 0x0000, 0xffdc, 0x0000, 0x0001, 0x0002,
	0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000a,
	0x000b, 0x000c, 0x000d, 0x000e, 0x000f, 0x0044, 0x0000, 0x0000,
	0xffee, 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016,
	0x0017, 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e,
	0x001f, 0x0020, 0x0054, 0x0000, 0xffee, 0x0021, 0x0022, 0x0023,
	0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b,
	0x002c, 0x002d, 0x002e, 0x002f, 0x0030, 0x0031, 0x0032, 0x0065,
	0xffbe, 0x0000, 0xfeac, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xffc1, 0x0001, 0x0002, 0xfead,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffc5, 0x0003, 0x0004, 0x0005, 0xfeaf, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xffca, 0x0006, 0x0007, 0x0008,
	0x0009, 0xfeb2, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffd0, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0xfeb6, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xffd7, 0x000f, 0x0010, 0x0011,
	0x0012, 0x0013, 0x0014, 0xfebb, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffdf, 0x0015, 0x0016, 0x0017, 0x0018, 0x0019, 0x001a, 0x001b,
	0xfec1, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xffe8, 0x001c, 0x001d, 0x001e,
	0x001f, 0x0020, 0x0021, 0x0022, 0x0023, 0xfec8, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xfff2, 0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a,
	0x002b, 0x002c, 0xfed0, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xfffd, 0x002d, 0x002e, 0x002f,
	0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0xfed9,
	0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffc7, 0x0037, 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d,
	0x003e, 0x003f, 0x0040, 0x0041, 0xfee3, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xffd4, 0x0000, 0x0001, 0x0002,
	0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000a,
	0x000b, 0xfeac, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffe2, 0x000c, 0x000d, 0x000e, 0x000f, 0x0010, 0x0011, 0x0012,
	0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 0x0018, 0xfeb8, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000, 0xfff1, 0x0019, 0x001a, 0x001b,
	0x001c, 0x001d, 0x001e, 0x001f, 0x0020, 0x0021, 0x0022, 0x0023,
	0x0024, 0x0025, 0x0026, 0xfec5, 0x0000, 0x0000, 0x0000, 0x0000,
	0xffcb, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d,
	0x002e, 0x002f, 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035,
	0xfed3, 0x0000, 0x0000, 0x0000, 0xffdc, 0x0000, 0x0001, 0x0002,
	0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000a,
	0x000b, 0x000c, 0x000d, 0x000e, 0x000f, 0xfeac, 0x0000, 0x0000,
	0xffee, 0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016,
	0x0017, 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e,
	0x001f, 0x0020, 0xfebc, 0x0000, 0xffee, 0x0021, 0x0022, 0x0023,
	0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b,
	0x002c, 0x002d, 0x002e, 0x002f, 0x0030, 0x0031, 0x0032, 0xfecd,
	0x0154, 0x0218, 0x0110, 0x00b0, 0x00cc, 0x00b0, 0x0088, 0x00b0,
	0x0044, 0x00b0, 0x0000, 0x00b0, 0x00fe, 0xff07, 0x0002, 0x00ff,
	0x00f8, 0x0007, 0x00fe, 0x00ee, 0x07ff, 0x0200, 0x00ef, 0xf800,
	0x0700, 0x00ee, 0xffff, 0xffff, 0xffff, 0x0000, 0x0000, 0x0001,
	0x0001, 0x0001, 0x0001, 0x0000, 0x0000, 0xffff, 0xffff, 0xffff,
	0xffff, 0x0000, 0x0000, 0x0001, 0x0001, 0x0001, 0x0001, 0x0000,
	0x0000, 0xffff, 0xffff, 0x0000, 0xffff, 0x0001, 0x0000, 0x0001,
	0x0001, 0x0000, 0x0000, 0xffff, 0xffff, 0xffff, 0xffff, 0x0000,
	0xffff, 0x0001, 0x0000, 0x0001, 0x0001, 0x0000, 0x0000, 0xffff,
	0xffff, 0xffff, 0x0000, 0x0000, 0x0000, 0x0044, 0x0088, 0x00cc,
	0x0110, 0x0154, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
	0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
	0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
	0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
	0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
	0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff
};

void (*SetDSP3)();
void DSP3_Command();

uint16 DSP3_DR;
uint16 DSP3_SR;
uint16 DSP3_MemoryIndex;

void DSP3_Reset()
{
  DSP3_DR = 0x0080;
  DSP3_SR = 0x0084;
  SetDSP3 = &DSP3_Command;
}

void DSP3_MemorySize()
{
	DSP3_DR = 0x0300;
	SetDSP3 = &DSP3_Reset;
}

void DSP3_TestMemory()
{
	DSP3_DR = 0x0000;
	SetDSP3 = &DSP3_Reset;
}

void DSP3_DumpDataROM()
{
	DSP3_DR = DSP3_DataROM[DSP3_MemoryIndex++];
	if (DSP3_MemoryIndex == 1024)
		SetDSP3 = &DSP3_Reset;
}

void DSP3_MemoryDump()
{
	DSP3_MemoryIndex = 0;
	SetDSP3 = &DSP3_DumpDataROM;
	DSP3_DumpDataROM();
}

int16 DSP3_WinLo;
int16 DSP3_WinHi;

void DSP3_OP06()
{
	DSP3_WinLo = (uint8)(DSP3_DR);
	DSP3_WinHi = (uint8)(DSP3_DR >> 8);
	DSP3_Reset();
}

void DSP3_OP03()
{
	int16 Lo = (uint8)(DSP3_DR);
	int16 Hi = (uint8)(DSP3_DR >> 8);
	int16 Ofs = (DSP3_WinLo * Hi << 1) + (Lo << 1);
	DSP3_DR = Ofs >> 1;
	SetDSP3 = &DSP3_Reset;
}

int16 DSP3_AddLo;
int16 DSP3_AddHi;

void DSP3_OP07_B()
{
	int16 Ofs = (DSP3_WinLo * DSP3_AddHi << 1) + (DSP3_AddLo << 1);
	DSP3_DR = Ofs >> 1;
	SetDSP3 = &DSP3_Reset;
}

void DSP3_OP07_A()
{
	int16 Lo = (uint8)(DSP3_DR);
	int16 Hi = (uint8)(DSP3_DR >> 8);

	if (Lo & 1)	Hi += (DSP3_AddLo & 1);

	DSP3_AddLo += Lo;
	DSP3_AddHi += Hi;

	if (DSP3_AddLo < 0)
		DSP3_AddLo += DSP3_WinLo;
	else
		if (DSP3_AddLo >= DSP3_WinLo)
			DSP3_AddLo -= DSP3_WinLo;

	if (DSP3_AddHi < 0)
		DSP3_AddHi += DSP3_WinHi;
	else
		if (DSP3_AddHi >= DSP3_WinHi)
			DSP3_AddHi -= DSP3_WinHi;

	DSP3_DR = DSP3_AddLo | (DSP3_AddHi << 8) | ((DSP3_AddHi >> 8) & 0xff);
	SetDSP3 = &DSP3_OP07_B;
}

void DSP3_OP07()
{
	uint32 dataOfs = ((DSP3_DR << 1) + 0x03b2) & 0x03ff;

	DSP3_AddHi = DSP3_DataROM[dataOfs];
	DSP3_AddLo = DSP3_DataROM[dataOfs + 1];

	SetDSP3 = &DSP3_OP07_A;
	DSP3_SR = 0x0080;
}

uint16 DSP3_Codewords;
uint16 DSP3_Outwords;
uint16 DSP3_Symbol;
uint16 DSP3_BitCount;
uint16 DSP3_Index;
uint16 DSP3_Codes[512];
uint16 DSP3_BitsLeft;
uint16 DSP3_ReqBits;
uint16 DSP3_ReqData;
uint16 DSP3_BitCommand;
uint8  DSP3_BaseLength;
uint16 DSP3_BaseCodes;
uint16 DSP3_BaseCode;
uint8  DSP3_CodeLengths[8];
uint16 DSP3_CodeOffsets[8];
uint16 DSP3_LZCode;
uint8  DSP3_LZLength;

uint16 DSP3_X;
uint16 DSP3_Y;

void DSP3_Coordinate()
{
	DSP3_Index++;

	switch (DSP3_Index)
	{
	case 3:
		{
			if (DSP3_DR == 0xffff)
				DSP3_Reset();
			break;
		}
	case 4:
		{
			DSP3_X = DSP3_DR;
			break;
		}
	case 5:
		{
			DSP3_Y = DSP3_DR;
			DSP3_DR = 1;
			break;
		}
	case 6:
		{
			DSP3_DR = DSP3_X;
			break;
		}
	case 7:
		{
			DSP3_DR = DSP3_Y;
			DSP3_Index = 0;
			break;
		}
	}
}

uint8  DSP3_Bitmap[8];
uint8  DSP3_Bitplane[8];
uint16 DSP3_BMIndex;
uint16 DSP3_BPIndex;
uint16 DSP3_Count;

void DSP3_Convert_A()
{
	if (DSP3_BMIndex < 8)
	{
		DSP3_Bitmap[DSP3_BMIndex++] = (uint8) (DSP3_DR);
		DSP3_Bitmap[DSP3_BMIndex++] = (uint8) (DSP3_DR >> 8);

		if (DSP3_BMIndex == 8)
		{
      short i, j;
			for (i=0; i < 8; i++)
				for (j=0; j < 8; j++)
				{
					DSP3_Bitplane[j] <<= 1;
					DSP3_Bitplane[j] |= (DSP3_Bitmap[i] >> j) & 1;
				}

			DSP3_BPIndex = 0;
			DSP3_Count--;
		}
	}

	if (DSP3_BMIndex == 8)
	{
		if (DSP3_BPIndex == 8)
		{
			if (!DSP3_Count) DSP3_Reset();
			DSP3_BMIndex = 0;
		}
		else
		{
			DSP3_DR = DSP3_Bitplane[DSP3_BPIndex++];
			DSP3_DR |= DSP3_Bitplane[DSP3_BPIndex++] << 8;
		}
	}
}

void DSP3_Convert()
{
	DSP3_Count = DSP3_DR;
	DSP3_BMIndex = 0;
	SetDSP3 = &DSP3_Convert_A;
}

bool DSP3_GetBits(uint8 Count)
{
	if (!DSP3_BitsLeft)
	{
		DSP3_BitsLeft = Count;
		DSP3_ReqBits = 0;
	}

	do {
		if (!DSP3_BitCount)
		{
			DSP3_SR = 0xC0;
			return false;
		}

		DSP3_ReqBits <<= 1;
		if (DSP3_ReqData & 0x8000) DSP3_ReqBits++;
		DSP3_ReqData <<= 1;

		DSP3_BitCount--;
		DSP3_BitsLeft--;

	} while (DSP3_BitsLeft);

	return true;
}

void DSP3_Decode_Data()
{
	if (!DSP3_BitCount)
	{
		if (DSP3_SR & 0x40)
		{
			DSP3_ReqData = DSP3_DR;
			DSP3_BitCount += 16;
		}
		else
		{
			DSP3_SR = 0xC0;
			return;
		}
	}

	if (DSP3_LZCode == 1)
	{
		if (!DSP3_GetBits(1))
			return;

		if (DSP3_ReqBits)
			DSP3_LZLength = 12;
		else
			DSP3_LZLength = 8;

		DSP3_LZCode++;
	}

	if (DSP3_LZCode == 2)
	{
		if (!DSP3_GetBits(DSP3_LZLength))
			return;

		DSP3_LZCode = 0;
		DSP3_Outwords--;
		if (!DSP3_Outwords) SetDSP3 = &DSP3_Reset;

		DSP3_SR = 0x80;
		DSP3_DR = DSP3_ReqBits;
		return;
	}

	if (DSP3_BaseCode == 0xffff)
	{
		if (!DSP3_GetBits(DSP3_BaseLength))
			return;

		DSP3_BaseCode = DSP3_ReqBits;
	}

	if (!DSP3_GetBits(DSP3_CodeLengths[DSP3_BaseCode]))
		return;

	DSP3_Symbol = DSP3_Codes[DSP3_CodeOffsets[DSP3_BaseCode] + DSP3_ReqBits];
	DSP3_BaseCode = 0xffff;

	if (DSP3_Symbol & 0xff00)
	{
		DSP3_Symbol += 0x7f02;
		DSP3_LZCode++;
	}
	else
	{
		DSP3_Outwords--;
		if (!DSP3_Outwords)
			SetDSP3 = &DSP3_Reset;
	}

	DSP3_SR = 0x80;
	DSP3_DR = DSP3_Symbol;
}

void DSP3_Decode_Tree()
{
	if (!DSP3_BitCount)
	{
		DSP3_ReqData = DSP3_DR;
		DSP3_BitCount += 16;
	}

	if (!DSP3_BaseCodes)
	{
		DSP3_GetBits(1);
		if (DSP3_ReqBits)
		{
			DSP3_BaseLength = 3;
			DSP3_BaseCodes = 8;
		}
		else
		{
			DSP3_BaseLength = 2;
			DSP3_BaseCodes = 4;
		}
	}

	while (DSP3_BaseCodes)
	{
		if (!DSP3_GetBits(3))
			return;

		DSP3_ReqBits++;

		DSP3_CodeLengths[DSP3_Index] = (uint8) DSP3_ReqBits;
		DSP3_CodeOffsets[DSP3_Index] = DSP3_Symbol;
		DSP3_Index++;

		DSP3_Symbol += 1 << DSP3_ReqBits;
		DSP3_BaseCodes--;
	}

	DSP3_BaseCode = 0xffff;
	DSP3_LZCode = 0;

	SetDSP3 = &DSP3_Decode_Data;
	if (DSP3_BitCount) DSP3_Decode_Data();
}

void DSP3_Decode_Symbols()
{
	DSP3_ReqData = DSP3_DR;
	DSP3_BitCount += 16;

	do {

		if (DSP3_BitCommand == 0xffff)
		{
			if (!DSP3_GetBits(2)) return;
			DSP3_BitCommand = DSP3_ReqBits;
		}

		switch (DSP3_BitCommand)
		{
		case 0:
			{
				if (!DSP3_GetBits(9)) return;
				DSP3_Symbol = DSP3_ReqBits;
				break;
			}
		case 1:
			{
				DSP3_Symbol++;
				break;
			}
		case 2:
			{
				if (!DSP3_GetBits(1)) return;
				DSP3_Symbol += 2 + DSP3_ReqBits;
				break;
			}
		case 3:
			{
				if (!DSP3_GetBits(4)) return;
				DSP3_Symbol += 4 + DSP3_ReqBits;
				break;
			}
		}

		DSP3_BitCommand = 0xffff;

		DSP3_Codes[DSP3_Index++] = DSP3_Symbol;
		DSP3_Codewords--;

	} while (DSP3_Codewords);

	DSP3_Index = 0;
	DSP3_Symbol = 0;
	DSP3_BaseCodes = 0;

	SetDSP3 = &DSP3_Decode_Tree;
	if (DSP3_BitCount) DSP3_Decode_Tree();
}

void DSP3_Decode_A()
{
	DSP3_Outwords = DSP3_DR;
	SetDSP3 = &DSP3_Decode_Symbols;
	DSP3_BitCount = 0;
	DSP3_BitsLeft = 0;
	DSP3_Symbol = 0;
	DSP3_Index = 0;
	DSP3_BitCommand = 0xffff;
	DSP3_SR = 0xC0;
}

void DSP3_Decode()
{
	DSP3_Codewords = DSP3_DR;
	SetDSP3 = &DSP3_Decode_A;
}


// Opcodes 1E/3E bit-perfect to 'dsp3-intro' log
// src: adapted from SD Gundam X/G-Next

int16 op3e_x;
int16 op3e_y;

int16 op1e_terrain[0x2000];
int16 op1e_cost[0x2000];
int16 op1e_weight[0x2000];

int16 op1e_cell;
int16 op1e_turn;
int16 op1e_search;

int16 op1e_x;
int16 op1e_y;

int16 op1e_min_radius;
int16 op1e_max_radius;

int16 op1e_max_search_radius;
int16 op1e_max_path_radius;

int16 op1e_lcv_radius;
int16 op1e_lcv_steps;
int16 op1e_lcv_turns;

void DSP3_OP3E()
{
	op3e_x = (uint8)(DSP3_DR & 0x00ff);
	op3e_y = (uint8)((DSP3_DR & 0xff00)>>8);

	DSP3_OP03();

	op1e_terrain[ DSP3_DR ] = 0x00;
	op1e_cost[ DSP3_DR ] = 0xff;
	op1e_weight[ DSP3_DR ] = 0;

	op1e_max_search_radius = 0;
	op1e_max_path_radius = 0;
}

void DSP3_OP1E_A();
void DSP3_OP1E_A1();
void DSP3_OP1E_A2();
void DSP3_OP1E_A3();

void DSP3_OP1E_B();
void DSP3_OP1E_B1();
void DSP3_OP1E_B2();

void DSP3_OP1E_C();
void DSP3_OP1E_C1();
void DSP3_OP1E_C2();

void DSP3_OP1E_D( int16, int16 *, int16 * );
void DSP3_OP1E_D1( int16 move, int16 *lo, int16 *hi );

void DSP3_OP1E()
{
	int lcv;

	op1e_min_radius = (uint8)(DSP3_DR & 0x00ff);
	op1e_max_radius = (uint8)((DSP3_DR & 0xff00)>>8);

	if( op1e_min_radius == 0 )
		op1e_min_radius++;

	if( op1e_max_search_radius >= op1e_min_radius )
		op1e_min_radius = op1e_max_search_radius+1;

	if( op1e_max_radius > op1e_max_search_radius )
		op1e_max_search_radius = op1e_max_radius;

	op1e_lcv_radius = op1e_min_radius;
	op1e_lcv_steps = op1e_min_radius;

	op1e_lcv_turns = 6;
	op1e_turn = 0;

	op1e_x = op3e_x;
	op1e_y = op3e_y;

	for( lcv = 0; lcv < op1e_min_radius; lcv++ )
		DSP3_OP1E_D( op1e_turn, &op1e_x, &op1e_y );

	DSP3_OP1E_A();
}

void DSP3_OP1E_A()
{
	int lcv;

	if( op1e_lcv_steps == 0 ) {
		op1e_lcv_radius++;

		op1e_lcv_steps = op1e_lcv_radius;

		op1e_x = op3e_x;
		op1e_y = op3e_y;

		for( lcv = 0; lcv < op1e_lcv_radius; lcv++ )
			DSP3_OP1E_D( op1e_turn, &op1e_x, &op1e_y );
	}

	if( op1e_lcv_radius > op1e_max_radius ) {
		op1e_turn++;
		op1e_lcv_turns--;

		op1e_lcv_radius = op1e_min_radius;
		op1e_lcv_steps = op1e_min_radius;

		op1e_x = op3e_x;
		op1e_y = op3e_y;

		for( lcv = 0; lcv < op1e_min_radius; lcv++ )
			DSP3_OP1E_D( op1e_turn, &op1e_x, &op1e_y );
	}

	if( op1e_lcv_turns == 0 ) {
		DSP3_DR = 0xffff;
		DSP3_SR = 0x0080;
		SetDSP3 = &DSP3_OP1E_B;
		return;
	}

	DSP3_DR = (uint8)(op1e_x) | ((uint8)(op1e_y)<<8);
	DSP3_OP03();

	op1e_cell = DSP3_DR;

	DSP3_SR = 0x0080;
	SetDSP3 = &DSP3_OP1E_A1;
}

void DSP3_OP1E_A1()
{
	DSP3_SR = 0x0084;
	SetDSP3 = &DSP3_OP1E_A2;
}

void DSP3_OP1E_A2()
{
	op1e_terrain[ op1e_cell ] = (uint8)(DSP3_DR & 0x00ff);

	DSP3_SR = 0x0084;
	SetDSP3 = &DSP3_OP1E_A3;
}

void DSP3_OP1E_A3()
{
	op1e_cost[ op1e_cell ] = (uint8)(DSP3_DR & 0x00ff);

	if( op1e_lcv_radius == 1 ) {
		if( op1e_terrain[ op1e_cell ] & 1 ) {
			op1e_weight[ op1e_cell ] = 0xff;
		} else {
			op1e_weight[ op1e_cell ] = op1e_cost[ op1e_cell ];
		}
	}
	else {
		op1e_weight[ op1e_cell ] = 0xff;
	}

	DSP3_OP1E_D( (int16)(op1e_turn+2), &op1e_x, &op1e_y );
	op1e_lcv_steps--;

	DSP3_SR = 0x0080;
	DSP3_OP1E_A();
}


void DSP3_OP1E_B()
{
	op1e_x = op3e_x;
	op1e_y = op3e_y;
	op1e_lcv_radius = 1;

	op1e_search = 0;

	DSP3_OP1E_B1();

	SetDSP3 = &DSP3_OP1E_C;
}


void DSP3_OP1E_B1()
{
	while( op1e_lcv_radius < op1e_max_radius ) {
		op1e_y--;

		op1e_lcv_turns = 6;
		op1e_turn = 5;

		while( op1e_lcv_turns ) {
			op1e_lcv_steps = op1e_lcv_radius;

			while( op1e_lcv_steps ) {
				DSP3_OP1E_D1( op1e_turn, &op1e_x, &op1e_y );

				if( 0 <= op1e_y && op1e_y < DSP3_WinHi &&
						0 <= op1e_x && op1e_x < DSP3_WinLo ) {
					DSP3_DR = (uint8)(op1e_x) | ((uint8)(op1e_y)<<8);
					DSP3_OP03();

					op1e_cell = DSP3_DR;
					if( op1e_cost[ op1e_cell ] < 0x80 &&
							op1e_terrain[ op1e_cell ] < 0x40 ) {
						DSP3_OP1E_B2();
					} // end cell perimeter
				}

				op1e_lcv_steps--;
			} // end search line

			op1e_turn--;
			if( op1e_turn == 0 ) op1e_turn = 6;

			op1e_lcv_turns--;
		} // end circle search

		op1e_lcv_radius++;
	} // end radius search
}


void DSP3_OP1E_B2()
{
	int16 cell;
	int16 path;
	int16 x,y;
	int16 lcv_turns;

	path = 0xff;
	lcv_turns = 6;

	while( lcv_turns ) {
		x = op1e_x;
		y = op1e_y;

		DSP3_OP1E_D1( lcv_turns, &x, &y );

		DSP3_DR = (uint8)(x) | ((uint8)(y)<<8);
		DSP3_OP03();

		cell = DSP3_DR;

		if( 0 <= y && y < DSP3_WinHi &&
				0 <= x && x < DSP3_WinLo  ) {

			if( op1e_terrain[ cell ] < 0x80 || op1e_weight[ cell ] == 0 ) {
				if( op1e_weight[ cell ] < path ) {
					path = op1e_weight[ cell ];
				}
			}
		} // end step travel

		lcv_turns--;
	} // end while turns

	if( path != 0xff ) {
		op1e_weight[ op1e_cell ] = path + op1e_cost[ op1e_cell ];
	}
}


void DSP3_OP1E_C()
{
	int lcv;

	op1e_min_radius = (uint8)(DSP3_DR & 0x00ff);
	op1e_max_radius = (uint8)((DSP3_DR & 0xff00)>>8);

	if( op1e_min_radius == 0 )
		op1e_min_radius++;

	if( op1e_max_path_radius >= op1e_min_radius )
		op1e_min_radius = op1e_max_path_radius+1;

	if( op1e_max_radius > op1e_max_path_radius )
		op1e_max_path_radius = op1e_max_radius;

	op1e_lcv_radius = op1e_min_radius;
	op1e_lcv_steps = op1e_min_radius;

	op1e_lcv_turns = 6;
	op1e_turn = 0;

	op1e_x = op3e_x;
	op1e_y = op3e_y;

	for( lcv = 0; lcv < op1e_min_radius; lcv++ )
		DSP3_OP1E_D( op1e_turn, &op1e_x, &op1e_y );

	DSP3_OP1E_C1();
}


void DSP3_OP1E_C1()
{
	int lcv;

	if( op1e_lcv_steps == 0 ) {
		op1e_lcv_radius++;

		op1e_lcv_steps = op1e_lcv_radius;

		op1e_x = op3e_x;
		op1e_y = op3e_y;

		for( lcv = 0; lcv < op1e_lcv_radius; lcv++ )
			DSP3_OP1E_D( op1e_turn, &op1e_x, &op1e_y );
	}

	if( op1e_lcv_radius > op1e_max_radius ) {
		op1e_turn++;
		op1e_lcv_turns--;

		op1e_lcv_radius = op1e_min_radius;
		op1e_lcv_steps = op1e_min_radius;

		op1e_x = op3e_x;
		op1e_y = op3e_y;

		for( lcv = 0; lcv < op1e_min_radius; lcv++ )
			DSP3_OP1E_D( op1e_turn, &op1e_x, &op1e_y );
	}

	if( op1e_lcv_turns == 0 ) {
		DSP3_DR = 0xffff;
		DSP3_SR = 0x0080;
		SetDSP3 = &DSP3_Reset;
		return;
	}

	DSP3_DR = (uint8)(op1e_x) | ((uint8)(op1e_y)<<8);
	DSP3_OP03();

	op1e_cell = DSP3_DR;

	DSP3_SR = 0x0080;
	SetDSP3 = &DSP3_OP1E_C2;
}


void DSP3_OP1E_C2()
{
	DSP3_DR = op1e_weight[ op1e_cell ];

	DSP3_OP1E_D( (int16)(op1e_turn+2), &op1e_x, &op1e_y );
	op1e_lcv_steps--;

	DSP3_SR = 0x0084;
	SetDSP3 = &DSP3_OP1E_C1;
}


void DSP3_OP1E_D( int16 move, int16 *lo, int16 *hi )
{
	uint32 dataOfs = ((move << 1) + 0x03b2) & 0x03ff;
	int16 Lo;
	int16 Hi;

	DSP3_AddHi = DSP3_DataROM[dataOfs];
	DSP3_AddLo = DSP3_DataROM[dataOfs + 1];

	Lo = (uint8)(*lo);
	Hi = (uint8)(*hi);

	if (Lo & 1)	Hi += (DSP3_AddLo & 1);

	DSP3_AddLo += Lo;
	DSP3_AddHi += Hi;

	if (DSP3_AddLo < 0)
		DSP3_AddLo += DSP3_WinLo;
	else
		if (DSP3_AddLo >= DSP3_WinLo)
			DSP3_AddLo -= DSP3_WinLo;

	if (DSP3_AddHi < 0)
		DSP3_AddHi += DSP3_WinHi;
	else
		if (DSP3_AddHi >= DSP3_WinHi)
			DSP3_AddHi -= DSP3_WinHi;

	*lo = DSP3_AddLo;
	*hi = DSP3_AddHi;
}


void DSP3_OP1E_D1( int16 move, int16 *lo, int16 *hi )
{
#ifndef NGC
	uint32 dataOfs = ((move << 1) + 0x03b2) & 0x03ff;
#endif
	int16 Lo;
	int16 Hi;

	const unsigned short HiAdd[] = {
		0x00, 0xFF, 0x00, 0x01, 0x01, 0x01, 0x00, 0x00,
		0x00, 0xFF, 0xFF, 0x00, 0x01, 0x00, 0xFF, 0x00
	};
	const unsigned short LoAdd[] = {
		0x00, 0x00, 0x01, 0x01, 0x00, 0xFF, 0xFF, 0x00
	};

	if( (*lo) & 1 )
		DSP3_AddHi = HiAdd[ move + 8 ];
	else
		DSP3_AddHi = HiAdd[ move + 0 ];
	DSP3_AddLo = LoAdd[ move ];

	Lo = (uint8)(*lo);
	Hi = (uint8)(*hi);

	if (Lo & 1)	Hi += (DSP3_AddLo & 1);

	DSP3_AddLo += Lo;
	DSP3_AddHi += Hi;

	*lo = DSP3_AddLo;
	*hi = DSP3_AddHi;
}


void DSP3_OP10()
{
	if( DSP3_DR == 0xffff ) {
		DSP3_Reset();
	} else {
		// absorb 2 bytes
		DSP3_DR = DSP3_DR;
	}
}


void DSP3_OP0C_A()
{
	// absorb 2 bytes

	DSP3_DR = 0;
	SetDSP3 = &DSP3_Reset;
}


void DSP3_OP0C()
{
	// absorb 2 bytes

	DSP3_DR = 0;
	//SetDSP3 = &DSP3_OP0C_A;
	SetDSP3 = &DSP3_Reset;
}


void DSP3_OP1C_C()
{
	// return 2 bytes
	DSP3_DR = 0;
	SetDSP3 = &DSP3_Reset;
}


void DSP3_OP1C_B()
{
	// absorb 2 bytes

	// return 2 bytes
	DSP3_DR = 0;
	SetDSP3 = &DSP3_OP1C_C;
}


void DSP3_OP1C_A()
{
	// absorb 2 bytes

	SetDSP3 = &DSP3_OP1C_B;
}


void DSP3_OP1C()
{
	// absorb 2 bytes

	SetDSP3 = &DSP3_OP1C_A;
}


void DSP3_Command()
{
	if (DSP3_DR < 0x40)
	{
		switch (DSP3_DR)
		{
    case 0x02: SetDSP3 = &DSP3_Coordinate; break;
    case 0x03: SetDSP3 = &DSP3_OP03; break;
    case 0x06: SetDSP3 = &DSP3_OP06; break;
    case 0x07: SetDSP3 = &DSP3_OP07; return;
    case 0x0c: SetDSP3 = &DSP3_OP0C; break;
    case 0x0f: SetDSP3 = &DSP3_TestMemory; break;
    case 0x10: SetDSP3 = &DSP3_OP10; break;
    case 0x18: SetDSP3 = &DSP3_Convert; break;
    case 0x1c: SetDSP3 = &DSP3_OP1C; break;
    case 0x1e: SetDSP3 = &DSP3_OP1E; break;
    case 0x1f: SetDSP3 = &DSP3_MemoryDump; break;
    case 0x38: SetDSP3 = &DSP3_Decode; break;
    case 0x3e: SetDSP3 = &DSP3_OP3E; break;
    default:
     return;
		}
		DSP3_SR = 0x0080;
		DSP3_Index = 0;
	}
}

void DSP3SetByte(uint8 byte, uint16 address)
{
	if ((address & 0xC000) == 0x8000)
    {
		if (DSP3_SR & 0x04)
		{
			DSP3_DR = (DSP3_DR & 0xff00) + byte;
			(*SetDSP3)();
		}
		else
		{
			DSP3_SR ^= 0x10;

			if (DSP3_SR & 0x10)	
				DSP3_DR = (DSP3_DR & 0xff00) + byte;
			else
			{
				DSP3_DR = (DSP3_DR & 0x00ff) + (byte << 8);
				(*SetDSP3)();
			}	
		}
	}
}

uint8 DSP3GetByte(uint16 address)
{
	if ((address & 0xC000) == 0x8000)
    {
		uint8 byte;

		if (DSP3_SR & 0x04)
		{
			byte = (uint8) DSP3_DR;
			(*SetDSP3)();
		}
		else
		{
			DSP3_SR ^= 0x10;

			if (DSP3_SR & 0x10)	
				byte = (uint8) (DSP3_DR);
			else
			{
				byte = (uint8) (DSP3_DR >> 8);
				(*SetDSP3)();
			}
		}

		return byte;
	}

	return (uint8) DSP3_SR;
}