snes9xgx/source/snes9x/seta010.cpp

/**********************************************************************************
  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.
**********************************************************************************/

#include "seta.h"
#include "memmap.h"

// Mode 7 scaling constants for all raster lines
const int16 ST010_M7Scale[176] = {
	0x0380,  0x0325,  0x02da,  0x029c,  0x0268,  0x023b,  0x0215,  0x01f3,
	0x01d5,  0x01bb,  0x01a3,  0x018e,  0x017b,  0x016a,  0x015a,  0x014b,
	0x013e,  0x0132,  0x0126,  0x011c,  0x0112,  0x0109,  0x0100,  0x00f8,
	0x00f0,  0x00e9,  0x00e3,  0x00dc,  0x00d6,  0x00d1,  0x00cb,  0x00c6,
	0x00c1,  0x00bd,  0x00b8,  0x00b4,  0x00b0,  0x00ac,  0x00a8,  0x00a5,
	0x00a2,  0x009e,  0x009b,  0x0098,  0x0095,  0x0093,  0x0090,  0x008d,
	0x008b,  0x0088,  0x0086,  0x0084,  0x0082,  0x0080,  0x007e,  0x007c,
	0x007a,  0x0078,  0x0076,  0x0074,  0x0073,  0x0071,  0x006f,  0x006e,
	0x006c,  0x006b,  0x0069,  0x0068,  0x0067,  0x0065,  0x0064,  0x0063,
	0x0062,  0x0060,  0x005f,  0x005e,  0x005d,  0x005c,  0x005b,  0x005a,
	0x0059,  0x0058,  0x0057,  0x0056,  0x0055,  0x0054,  0x0053,  0x0052,
	0x0051,  0x0051,  0x0050,  0x004f,  0x004e,  0x004d,  0x004d,  0x004c,
	0x004b,  0x004b,  0x004a,  0x0049,  0x0048,  0x0048,  0x0047,  0x0047,
	0x0046,  0x0045,  0x0045,  0x0044,  0x0044,  0x0043,  0x0042,  0x0042,
	0x0041,  0x0041,  0x0040,  0x0040,  0x003f,  0x003f,  0x003e,  0x003e,
	0x003d,  0x003d,  0x003c,  0x003c,  0x003b,  0x003b,  0x003a,  0x003a,
	0x003a,  0x0039,  0x0039,  0x0038,  0x0038,  0x0038,  0x0037,  0x0037,
	0x0036,  0x0036,  0x0036,  0x0035,  0x0035,  0x0035,  0x0034,  0x0034,
	0x0034,  0x0033,  0x0033,  0x0033,  0x0032,  0x0032,  0x0032,  0x0031,
	0x0031,  0x0031,  0x0030,  0x0030,  0x0030,  0x0030,  0x002f,  0x002f,
	0x002f,  0x002e,  0x002e,  0x002e,  0x002e,  0x002d,  0x002d,  0x002d,
	0x002d,  0x002c,  0x002c,  0x002c,  0x002c,  0x002b,  0x002b,  0x002b
};

// H-DMA hack
bool seta_hack;

//temporary Op04 requirement
#include <math.h>

#ifndef PI
#define PI 3.1415926535897932384626433832795
#endif

ST010_Regs ST010;

uint8 S9xGetST010(uint32 Address)
{
	if(!(Address&0x80000))
		return 0x80;

	if((Address&0xFFF)==0x20)
		return ST010.op_reg;
	if ((Address&0xFFF)==0x21)
		return ST010.execute;
	return Memory.SRAM[Address&Memory.SRAMMask];
}

const int16 ST010_SinTable[256] = {
	 0x0000,  0x0324,  0x0648,  0x096a,  0x0c8c,  0x0fab,  0x12c8,  0x15e2,
	 0x18f9,  0x1c0b,  0x1f1a,  0x2223,  0x2528,  0x2826,  0x2b1f,  0x2e11,
	 0x30fb,  0x33df,  0x36ba,  0x398c,  0x3c56,  0x3f17,  0x41ce,  0x447a,
	 0x471c,  0x49b4,  0x4c3f,  0x4ebf,  0x5133,  0x539b,  0x55f5,  0x5842,
	 0x5a82,  0x5cb3,  0x5ed7,  0x60eb,  0x62f1,  0x64e8,  0x66cf,  0x68a6,
	 0x6a6d,  0x6c23,  0x6dc9,  0x6f5e,  0x70e2,  0x7254,  0x73b5,  0x7504,
	 0x7641,  0x776b,  0x7884,  0x7989,  0x7a7c,  0x7b5c,  0x7c29,  0x7ce3,
	 0x7d89,  0x7e1d,  0x7e9c,  0x7f09,  0x7f61,  0x7fa6,  0x7fd8,  0x7ff5,
	 0x7fff,  0x7ff5,  0x7fd8,  0x7fa6,  0x7f61,  0x7f09,  0x7e9c,  0x7e1d,
	 0x7d89,  0x7ce3,  0x7c29,  0x7b5c,  0x7a7c,  0x7989,  0x7884,  0x776b,
	 0x7641,  0x7504,  0x73b5,  0x7254,  0x70e2,  0x6f5e,  0x6dc9,  0x6c23,
	 0x6a6d,  0x68a6,  0x66cf,  0x64e8,  0x62f1,  0x60eb,  0x5ed7,  0x5cb3,
	 0x5a82,  0x5842,  0x55f5,  0x539b,  0x5133,  0x4ebf,  0x4c3f,  0x49b4,
	 0x471c,  0x447a,  0x41ce,  0x3f17,  0x3c56,  0x398c,  0x36ba,  0x33df,
	 0x30fb,  0x2e11,  0x2b1f,  0x2826,  0x2528,  0x2223,  0x1f1a,  0x1c0b,
	 0x18f8,  0x15e2,  0x12c8,  0x0fab,  0x0c8c,  0x096a,  0x0648,  0x0324,
	 0x0000, -0x0324, -0x0648, -0x096b, -0x0c8c, -0x0fab, -0x12c8, -0x15e2,
	-0x18f9, -0x1c0b, -0x1f1a, -0x2223, -0x2528, -0x2826, -0x2b1f, -0x2e11,
	-0x30fb, -0x33df, -0x36ba, -0x398d, -0x3c56, -0x3f17, -0x41ce, -0x447a,
	-0x471c, -0x49b4, -0x4c3f, -0x4ebf, -0x5133, -0x539b, -0x55f5, -0x5842,
	-0x5a82, -0x5cb3, -0x5ed7, -0x60ec, -0x62f1, -0x64e8, -0x66cf, -0x68a6,
	-0x6a6d, -0x6c23, -0x6dc9, -0x6f5e, -0x70e2, -0x7254, -0x73b5, -0x7504,
	-0x7641, -0x776b, -0x7884, -0x7989, -0x7a7c, -0x7b5c, -0x7c29, -0x7ce3,
	-0x7d89, -0x7e1d, -0x7e9c, -0x7f09, -0x7f61, -0x7fa6, -0x7fd8, -0x7ff5,
	-0x7fff, -0x7ff5, -0x7fd8, -0x7fa6, -0x7f61, -0x7f09, -0x7e9c, -0x7e1d,
	-0x7d89, -0x7ce3, -0x7c29, -0x7b5c, -0x7a7c, -0x7989, -0x7883, -0x776b,
	-0x7641, -0x7504, -0x73b5, -0x7254, -0x70e2, -0x6f5e, -0x6dc9, -0x6c23,
	-0x6a6d, -0x68a6, -0x66cf, -0x64e8, -0x62f1, -0x60eb, -0x5ed7, -0x5cb3,
	-0x5a82, -0x5842, -0x55f5, -0x539a, -0x5133, -0x4ebf, -0x4c3f, -0x49b3,
	-0x471c, -0x447a, -0x41cd, -0x3f17, -0x3c56, -0x398c, -0x36b9, -0x33de,
	-0x30fb, -0x2e10, -0x2b1f, -0x2826, -0x2527, -0x2223, -0x1f19, -0x1c0b,
	-0x18f8, -0x15e2, -0x12c8, -0x0fab, -0x0c8b, -0x096a, -0x0647, -0x0324};

const unsigned char ST010_ArcTan[32][32] = {
	{ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
	  0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80},
	{ 0x80, 0xa0, 0xad, 0xb3, 0xb6, 0xb8, 0xb9, 0xba, 0xbb, 0xbb, 0xbc, 0xbc, 0xbd, 0xbd, 0xbd, 0xbd,
	  0xbd, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbf, 0xbf, 0xbf, 0xbf},
	{ 0x80, 0x93, 0xa0, 0xa8, 0xad, 0xb0, 0xb3, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xb9, 0xba, 0xba, 0xbb,
	  0xbb, 0xbb, 0xbb, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd},
	{ 0x80, 0x8d, 0x98, 0xa0, 0xa6, 0xaa, 0xad, 0xb0, 0xb1, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb7, 0xb8,
	  0xb8, 0xb9, 0xb9, 0xba, 0xba, 0xba, 0xba, 0xbb, 0xbb, 0xbb, 0xbb, 0xbb, 0xbc, 0xbc, 0xbc, 0xbc},
	{ 0x80, 0x8a, 0x93, 0x9a, 0xa0, 0xa5, 0xa8, 0xab, 0xad, 0xaf, 0xb0, 0xb2, 0xb3, 0xb4, 0xb5, 0xb5,
	  0xb6, 0xb7, 0xb7, 0xb8, 0xb8, 0xb8, 0xb9, 0xb9, 0xb9, 0xba, 0xba, 0xba, 0xba, 0xba, 0xbb, 0xbb},
	{ 0x80, 0x88, 0x90, 0x96, 0x9b, 0xa0, 0xa4, 0xa7, 0xa9, 0xab, 0xad, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3,
	  0xb4, 0xb4, 0xb5, 0xb6, 0xb6, 0xb6, 0xb7, 0xb7, 0xb8, 0xb8, 0xb8, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9},
	{ 0x80, 0x87, 0x8d, 0x93, 0x98, 0x9c, 0xa0, 0xa3, 0xa6, 0xa8, 0xaa, 0xac, 0xad, 0xae, 0xb0, 0xb0,
	  0xb1, 0xb2, 0xb3, 0xb4, 0xb4, 0xb5, 0xb5, 0xb6, 0xb6, 0xb6, 0xb7, 0xb7, 0xb7, 0xb8, 0xb8, 0xb8},
	{ 0x80, 0x86, 0x8b, 0x90, 0x95, 0x99, 0x9d, 0xa0, 0xa3, 0xa5, 0xa7, 0xa9, 0xaa, 0xac, 0xad, 0xae,
	  0xaf, 0xb0, 0xb1, 0xb2, 0xb2, 0xb3, 0xb3, 0xb4, 0xb4, 0xb5, 0xb5, 0xb6, 0xb6, 0xb6, 0xb7, 0xb7},
	{ 0x80, 0x85, 0x8a, 0x8f, 0x93, 0x97, 0x9a, 0x9d, 0xa0, 0xa2, 0xa5, 0xa6, 0xa8, 0xaa, 0xab, 0xac,
	  0xad, 0xae, 0xaf, 0xb0, 0xb0, 0xb1, 0xb2, 0xb2, 0xb3, 0xb3, 0xb4, 0xb4, 0xb5, 0xb5, 0xb5, 0xb5},
	{ 0x80, 0x85, 0x89, 0x8d, 0x91, 0x95, 0x98, 0x9b, 0x9e, 0xa0, 0xa0, 0xa4, 0xa6, 0xa7, 0xa9, 0xaa,
	  0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb0, 0xb1, 0xb1, 0xb2, 0xb2, 0xb3, 0xb3, 0xb4, 0xb4, 0xb4},
	{ 0x80, 0x84, 0x88, 0x8c, 0x90, 0x93, 0x96, 0x99, 0x9b, 0x9e, 0xa0, 0xa2, 0xa4, 0xa5, 0xa7, 0xa8,
	  0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xaf, 0xb0, 0xb0, 0xb1, 0xb2, 0xb2, 0xb2, 0xb3, 0xb3},
	{ 0x80, 0x84, 0x87, 0x8b, 0x8e, 0x91, 0x94, 0x97, 0x9a, 0x9c, 0x9e, 0xa0, 0xa2, 0xa3, 0xa5, 0xa6,
	  0xa7, 0xa9, 0xaa, 0xab, 0xac, 0xac, 0xad, 0xae, 0xae, 0xaf, 0xb0, 0xb0, 0xb1, 0xb1, 0xb2, 0xb2},
	{ 0x80, 0x83, 0x87, 0x8a, 0x8d, 0x90, 0x93, 0x96, 0x98, 0x9a, 0x9c, 0x9e, 0xa0, 0xa2, 0xa3, 0xa5,
	  0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xac, 0xad, 0xae, 0xae, 0xaf, 0xb0, 0xb0, 0xb0, 0xb1},
	{ 0x80, 0x83, 0x86, 0x89, 0x8c, 0x8f, 0x92, 0x94, 0x96, 0x99, 0x9b, 0x9d, 0x9e, 0xa0, 0xa2, 0xa3,
	  0xa4, 0xa5, 0xa7, 0xa8, 0xa9, 0xa9, 0xaa, 0xab, 0xac, 0xac, 0xad, 0xae, 0xae, 0xaf, 0xaf, 0xb0},
	{ 0x80, 0x83, 0x86, 0x89, 0x8b, 0x8e, 0x90, 0x93, 0x95, 0x97, 0x99, 0x9b, 0x9d, 0x9e, 0xa0, 0xa1,
	  0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xaa, 0xab, 0xac, 0xad, 0xad, 0xae, 0xae, 0xaf},
	{ 0x80, 0x83, 0x85, 0x88, 0x8b, 0x8d, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9b, 0x9d, 0x9f, 0xa0,
	  0xa1, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa8, 0xa9, 0xaa, 0xab, 0xab, 0xac, 0xad, 0xad, 0xae},
	{ 0x80, 0x83, 0x85, 0x88, 0x8a, 0x8c, 0x8f, 0x91, 0x93, 0x95, 0x97, 0x99, 0x9a, 0x9c, 0x9d, 0x9f,
	  0xa0, 0xa1, 0xa2, 0xa3, 0xa5, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xaa, 0xab, 0xab, 0xac, 0xad},
	{ 0x80, 0x82, 0x85, 0x87, 0x89, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x97, 0x99, 0x9b, 0x9c, 0x9d,
	  0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa8, 0xa9, 0xaa, 0xaa, 0xab, 0xac},
	{ 0x80, 0x82, 0x85, 0x87, 0x89, 0x8b, 0x8d, 0x8f, 0x91, 0x93, 0x95, 0x96, 0x98, 0x99, 0x9b, 0x9c,
	  0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa7, 0xa8, 0xa9, 0xa9, 0xaa, 0xab},
	{ 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x95, 0x97, 0x98, 0x9a, 0x9b,
	  0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa6, 0xa7, 0xa8, 0xa8, 0xa9, 0xaa},
	{ 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x91, 0x93, 0x94, 0x96, 0x97, 0x99, 0x9a,
	  0x9b, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa5, 0xa6, 0xa7, 0xa7, 0xa8, 0xa9},
	{ 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8b, 0x8d, 0x8f, 0x90, 0x92, 0x94, 0x95, 0x97, 0x98, 0x99,
	  0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa4, 0xa5, 0xa6, 0xa6, 0xa7, 0xa8},
	{ 0x80, 0x82, 0x84, 0x86, 0x87, 0x89, 0x8b, 0x8d, 0x8e, 0x90, 0x91, 0x93, 0x94, 0x96, 0x97, 0x98,
	  0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa3, 0xa4, 0xa5, 0xa6, 0xa6, 0xa7},
	{ 0x80, 0x82, 0x84, 0x85, 0x87, 0x89, 0x8a, 0x8c, 0x8e, 0x8f, 0x91, 0x92, 0x94, 0x95, 0x96, 0x98,
	  0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa2, 0xa3, 0xa4, 0xa5, 0xa5, 0xa6},
	{ 0x80, 0x82, 0x83, 0x85, 0x87, 0x88, 0x8a, 0x8c, 0x8d, 0x8f, 0x90, 0x92, 0x93, 0x94, 0x96, 0x97,
	  0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa2, 0xa3, 0xa4, 0xa5, 0xa5},
	{ 0x80, 0x82, 0x83, 0x85, 0x86, 0x88, 0x8a, 0x8b, 0x8d, 0x8e, 0x90, 0x91, 0x92, 0x94, 0x95, 0x96,
	  0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa2, 0xa3, 0xa4, 0xa4},
	{ 0x80, 0x82, 0x83, 0x85, 0x86, 0x88, 0x89, 0x8b, 0x8c, 0x8e, 0x8f, 0x90, 0x92, 0x93, 0x94, 0x95,
	  0x96, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa2, 0xa3, 0xa4},
	{ 0x80, 0x82, 0x83, 0x85, 0x86, 0x87, 0x89, 0x8a, 0x8c, 0x8d, 0x8e, 0x90, 0x91, 0x92, 0x93, 0x95,
	  0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9e, 0x9f, 0xa0, 0xa1, 0xa1, 0xa2, 0xa3},
	{ 0x80, 0x81, 0x83, 0x84, 0x86, 0x87, 0x89, 0x8a, 0x8b, 0x8d, 0x8e, 0x8f, 0x90, 0x92, 0x93, 0x94,
	  0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9e, 0x9f, 0xa0, 0xa1, 0xa1, 0xa2},
	{ 0x80, 0x81, 0x83, 0x84, 0x86, 0x87, 0x88, 0x8a, 0x8b, 0x8c, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93,
	  0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0x9f, 0xa0, 0xa1, 0xa1},
	{ 0x80, 0x81, 0x83, 0x84, 0x85, 0x87, 0x88, 0x89, 0x8b, 0x8c, 0x8d, 0x8e, 0x90, 0x91, 0x92, 0x93,
	  0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0x9f, 0xa0, 0xa1},
	{ 0x80, 0x81, 0x83, 0x84, 0x85, 0x87, 0x88, 0x89, 0x8a, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92,
	  0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9c, 0x9d, 0x9e, 0x9f, 0x9f, 0xa0}};

short ST010_Sin(short Theta)
{
	return ST010_SinTable[(Theta >> 8) & 0xff];
}

short ST010_Cos(short Theta)
{
	return ST010_SinTable[((Theta + 0x4000) >> 8) & 0xff];
}

void ST010_OP01(short x0, short y0, short &x1, short &y1, short &Quadrant, short &Theta)
{
 	if ((x0 < 0) && (y0 < 0))
	{	
		x1 = -x0;
		y1 = -y0;
		Quadrant = -0x8000;
	}
	else if (x0 < 0)
	{
		x1 = y0;
		y1 = -x0;
		Quadrant = -0x4000;
	}
	else if (y0 < 0)
	{
		x1 = -y0;
		y1 = x0;
		Quadrant = 0x4000;
	}
	else
	{
		x1 = x0;
		y1 = y0;	
		Quadrant = 0x0000;
	}

 	while ((x1 > 0x1f) || (y1 > 0x1f))
	{
		if (x1 > 1) x1 >>= 1;
		if (y1 > 1) y1 >>= 1;
	}

	if (y1 == 0) Quadrant += 0x4000;

	Theta = (ST010_ArcTan[y1][x1] << 8) ^ Quadrant;
}

void ST010_Scale(short Multiplier, short X0, short Y0, int &X1, int &Y1)
{
	X1 = X0 * Multiplier << 1;
	Y1 = Y0 * Multiplier << 1;
}

void ST010_Multiply(short Multiplicand, short Multiplier, int &Product)
{
	Product = Multiplicand * Multiplier << 1;
}

void ST010_Rotate(short Theta, short X0, short Y0, short &X1, short &Y1)
{
	X1 = (Y0 * ST010_Sin(Theta) >> 15) + (X0 * ST010_Cos(Theta) >> 15);
	Y1 = (Y0 * ST010_Cos(Theta) >> 15) - (X0 * ST010_Sin(Theta) >> 15);
}

void SETA_Distance(short Y0, short X0, short &Distance)
{
	if (X0 < 0) X0 = -X0;
	if (Y0 < 0) Y0 = -Y0;
	Distance = ((X0 * 0x7af0) + 0x4000) >> 15;
}

void ST010_SortDrivers(uint16 Positions, uint16 Places[32], uint16 Drivers[32]) 
{
	bool Sorted;
	uint16 Temp;

	if (Positions > 1)
		do {
			Sorted = true;
			for (int i = 0; i < Positions - 1; i++)
				if (Places[i] < Places[i + 1]) 
				{
					Temp = Places[i + 1];
					Places[i + 1] = Places[i];
					Places[i] = Temp;

					Temp = Drivers[i + 1];
					Drivers[i + 1] = Drivers[i];
					Drivers[i] = Temp;

					Sorted = false;
				}
			Positions--;
		} while (!Sorted);
}

#define ST010_WORD(offset) (Memory.SRAM[offset + 1] << 8) | Memory.SRAM[offset]

void S9xSetST010(uint32 Address, uint8 Byte)
{
	if(!(Address&0x80000))
	{
		ST010.control_enable=TRUE;
		return;
	}
	//printf("Write %06X:%02X\n", Address, Byte);

	if((Address &0xFFF) ==0x20 && ST010.control_enable)
		ST010.op_reg=Byte;
	if((Address &0xFFF) ==0x21 && ST010.control_enable)
		ST010.execute=Byte;
	else Memory.SRAM[Address&Memory.SRAMMask]=Byte;

	if(ST010.execute&0x80)
	{
		switch(ST010.op_reg)
		{
		// Sorts Driver Placements
		//
		// Input
		//   0x0024-0x0025 : Positions
		//   0x0040-0x007f : Places
		//   0x0080-0x00ff : Drivers
		// Output
		//   0x0040-0x007f : Places
		//   0x0080-0x00ff : Drivers
		//
		case 0x02:
			{
#ifdef FAST_LSB_WORD_ACCESS
				ST010_SortDrivers(*(short*)&SRAM[0x0024], (uint16*) (SRAM + 0x0040), (uint16*) (SRAM + 0x0080));
#else
				uint16 Places[32];
				uint16 Positions = ST010_WORD(0x0024);
				int Pos, Offset;

				Offset = 0;

				for (Pos = 0; Pos < Positions; Pos++) 
				{
					Places[Pos] = ST010_WORD(0x0040 + Offset);
					Offset += 2;
				}

				ST010_SortDrivers(Positions, Places, (uint16*) (SRAM + 0x0080));

				Offset = 0;

				for (Pos = 0; Pos < Positions; Pos++)
				{
					SRAM[0x0040 + Offset]=(uint8)(Places[Pos]);
					SRAM[0x0041 + Offset]=(uint8)(Places[Pos] >> 8);
					Offset += 2;
				}
#endif			
				break;
				
			}

		// Two Dimensional Coordinate Scale
		//
		// Input
		//   0x0000-0x0001 : X0 (signed)
		//   0x0002-0x0003 : Y0 (signed)
		//   0x0004-0x0005 : Multiplier (signed)
		// Output
		//   0x0010-0x0013 : X1 (signed)
		//   0x0014-0x0017 : Y1 (signed)
		//
		case 0x03:
			{
#ifdef FAST_LSB_WORD_ACCESS
				ST010_Scale(*(short*)&Memory.SRAM[0x0004], *(short*)&Memory.SRAM[0x0000], *(short*)&Memory.SRAM[0x0002],
					(int&) Memory.SRAM[0x0010], (int&) Memory.SRAM[0x0014]);
#else
				int x1, y1;

				ST010_Scale(ST010_WORD(0x0004), ST010_WORD(0x0000), ST010_WORD(0x0002), x1, y1);

				Memory.SRAM[0x0010]=(uint8)(x1);
				Memory.SRAM[0x0011]=(uint8)(x1 >> 8);
				Memory.SRAM[0x0012]=(uint8)(x1 >> 16);
				Memory.SRAM[0x0013]=(uint8)(x1 >> 24);
				Memory.SRAM[0x0014]=(uint8)(y1);
				Memory.SRAM[0x0015]=(uint8)(y1 >> 8);
				Memory.SRAM[0x0016]=(uint8)(y1 >> 16);
				Memory.SRAM[0x0017]=(uint8)(y1 >> 24);
#endif
				break;
			}

		// 16-bit Multiplication
		//
		// Input
		//   0x0000-0x0001 : Multiplcand (signed)
		//   0x0002-0x0003 : Multiplier (signed)
		// Output
		//   0x0010-0x0013 : Product (signed)
		//
		case 0x06:
			{
#ifdef FAST_LSB_WORD_ACCESS
				ST010_Multiply(*(short*)&Memory.SRAM[0x0000], *(short*)&Memory.SRAM[0x0002], (int&) Memory.SRAM[0x0010]);
#else
				int Product;

				ST010_Multiply(ST010_WORD(0x0000), ST010_WORD(0x0002), Product);

				Memory.SRAM[0x0010]=(uint8)(Product);
				Memory.SRAM[0x0011]=(uint8)(Product >> 8);
				Memory.SRAM[0x0012]=(uint8)(Product >> 16);
				Memory.SRAM[0x0013]=(uint8)(Product >> 24);
#endif
				break;
			}

		// Mode 7 Raster Data Calculation
		//
		// Input
		//   0x0000-0x0001 : Angle (signed)
		// Output
		//   0x00f0-0x024f : Mode 7 Matrix A
		//   0x0250-0x03af : Mode 7 Matrix B
		//   0x03b0-0x050f : Mode 7 Matrix C
		//   0x0510-0x066f : Mode 7 Matrix D
		//
		case 0x07:
			{
				int16 data;
				int32 offset = 0;
				int16 Theta = ST010_WORD(0x0000);

				for (int32 line = 0; line < 176; line++)
				{
					// Calculate Mode 7 Matrix A/D data
					data = ST010_M7Scale[line] * ST010_Cos(Theta) >> 15;
				
					Memory.SRAM[0x00f0 + offset]=(uint8)(data);
					Memory.SRAM[0x00f1 + offset]=(uint8)(data >> 8);
					Memory.SRAM[0x0510 + offset]=(uint8)(data);
					Memory.SRAM[0x0511 + offset]=(uint8)(data >> 8); 

					// Calculate Mode 7 Matrix B/C data
					data = ST010_M7Scale[line] * ST010_Sin(Theta) >> 15;  

					Memory.SRAM[0x0250 + offset]=(uint8)(data);
					Memory.SRAM[0x0251 + offset]=(uint8)(data >> 8);
		
					if (data) data = ~data;
				 
					Memory.SRAM[0x03b0 + offset]=(uint8)(data);
					Memory.SRAM[0x03b1 + offset]=(uint8)(data >> 8);
		
					offset += 2;
				}

				// Shift Angle for use with Lookup table
				Memory.SRAM[0x00] = Memory.SRAM[0x01];
				Memory.SRAM[0x01] = 0x00;

				break;
			}

		// Two dimensional Coordinate Rotation
		//
		// Input
		//   0x0000-0x0001 : X0 (signed)
		//   0x0002-0x0003 : Y0 (signed)
		//   0x0004-0x0005 : Angle (signed)
		// Output
		//   0x0010-0x0011 : X1 (signed)
		//   0x0012-0x0013 : Y1 (signed)
		//
		case 0x08:
			{
#ifdef FAST_LSB_WORD_ACCESS
				ST010_Rotate(*(short*)&Memory.SRAM[0x0004], *(short*)&Memory.SRAM[0x0000], *(short*)&Memory.SRAM[0x0002],
					(short&) Memory.SRAM[0x0010], (short&) Memory.SRAM[0x0012]);
#else
				short x1, y1;

				ST010_Rotate(ST010_WORD(0x0004), ST010_WORD(0x0000), ST010_WORD(0x0002), x1, y1);

				Memory.SRAM[0x0010]=(uint8)(x1);
				Memory.SRAM[0x0011]=(uint8)(x1 >> 8);
				Memory.SRAM[0x0012]=(uint8)(y1);
				Memory.SRAM[0x0013]=(uint8)(y1 >> 8);
#endif
				break;
			}

		// Input
		//   0x0000-0x0001 : DX (signed)
		//   0x0002-0x0003 : DY (signed)
		// Output
		//   0x0010-0x0011 : Angle (signed)
		//
		case 0x01:
			{
				Memory.SRAM[0x0006] = Memory.SRAM[0x0002];
				Memory.SRAM[0x0007] = Memory.SRAM[0x0003];

#ifdef FAST_LSB_WORD_ACCESS
				ST010_OP01(*(short*)&Memory.SRAM[0x0000], *(short*)&Memory.SRAM[0x0002],
					(short&) Memory.SRAM[0x0000], (short&) Memory.SRAM[0x0002],
					(short&) Memory.SRAM[0x0004], (short&) Memory.SRAM[0x0010]);
#else
				short x1, y1, Quadrant, Theta;

				ST010_OP01(ST010_WORD(0x0000), ST010_WORD(0x0002), x1, y1, Quadrant, Theta);

				Memory.SRAM[0x0000]=(uint8)(x1);
				Memory.SRAM[0x0001]=(uint8)(x1 >> 8);
				Memory.SRAM[0x0002]=(uint8)(y1);
				Memory.SRAM[0x0003]=(uint8)(y1 >> 8);
				Memory.SRAM[0x0004]=(uint8)(Quadrant);
				Memory.SRAM[0x0005]=(uint8)(Quadrant >> 8);
				Memory.SRAM[0x0010]=(uint8)(Theta);
				Memory.SRAM[0x0011]=(uint8)(Theta >> 8);
#endif
				break;
		}

		// calculate the vector length of (x,y)
		case 0x04:
			{
				int16 square, x,y;
#ifdef FAST_LSB_WORD_ACCESS
				x=*((int16*)Memory.SRAM);
				y=*((int16*)&Memory.SRAM[2]);
#else
				x=Memory.SRAM[0]|(Memory.SRAM[1]<<8);
				y=Memory.SRAM[2]|(Memory.SRAM[3]<<8);
#endif
				square=(int16)sqrt((double)(y*y+x*x));
				//SETA_Distance( x,y,square );

#ifdef FAST_LSB_WORD_ACCESS
				*((int16*)&Memory.SRAM[0x10])=square;
#else
				Memory.SRAM[0x10]=(uint8)(square);
				Memory.SRAM[0x11]=(uint8)(square>>8);
#endif
				break;
			}

		// calculate AI orientation based on specific guidelines
		case 0x05:
			{
				int dx,dy;
				int16 a1,b1,c1;
				uint16 o1;

				bool wrap=false;

				// target (x,y) coordinates
				int16 ypos_max = ST010_WORD(0x00C0);
				int16 xpos_max = ST010_WORD(0x00C2);

				// current coordinates and direction
				int32 ypos = SRAM[0xC4]|(SRAM[0xC5]<<8)|(SRAM[0xC6]<<16)|(SRAM[0xC7]<<24);
				int32 xpos = SRAM[0xC8]|(SRAM[0xC9]<<8)|(SRAM[0xCA]<<16)|(SRAM[0xCB]<<24);
				uint16 rot = SRAM[0xCC]|(SRAM[0xCD]<<8);

				// physics
				uint16 speed = ST010_WORD(0x00D4);
				uint16 accel = ST010_WORD(0x00D6);
				uint16 speed_max = ST010_WORD(0x00D8);

				// special condition acknowledgment
				int16 system = ST010_WORD(0x00DA);
				int16 flags = ST010_WORD(0x00DC);

				// new target coordinates
				int16 ypos_new = ST010_WORD(0x00DE);
				int16 xpos_new = ST010_WORD(0x00E0);

				// mask upper bit
				xpos_new &= 0x7FFF;

				// get the current distance
				dx = xpos_max-(xpos>>16);
				dy = ypos_max-(ypos>>16);

				// quirk: clear and move in9
				SRAM[0xD2]=0xFF;
				SRAM[0xD3]=0xFF;
				SRAM[0xDA]=0;
				SRAM[0xDB]=0;

				// grab the target angle
				ST010_OP01(dy,dx,a1,b1,c1,(int16 &)o1);

				// check for wrapping
				//if((o1<0x6000 && rot>0xA000) ||
					// (rot<0x6000 && o1>0xA000))
				//if(o1<rot)
				if(abs(o1-rot)>0x8000)
				{
					o1+=0x8000;
					rot+=0x8000;
					wrap=true;
				}
				//o1=0x0000;
				//rot=0xFF00;

				uint16 old_speed;

				old_speed = speed;

				// special case
				if(abs(o1-rot)==0x8000)
				{
					speed = 0x100;
				}
				// slow down for sharp curves
				else if(abs(o1-rot)>=0x1000)
				{
					uint32 slow = abs(o1-rot);
					slow >>= 4;	// scaling
					speed -= slow;
				}
				// otherwise accelerate
				else
				{
					speed += accel;
					if(speed > speed_max)
					{
						// clip speed
						speed = speed_max;
					}
				}

				// prevent negative/positive overflow
				if(abs(old_speed-speed)>0x8000) {
					if(old_speed<speed) speed=0;
					else speed=0xff00;
				}

				// adjust direction by so many degrees
				// be careful of negative adjustments
				if( (o1>rot && (o1-rot)>0x80) ||
						(o1<rot && (rot-o1)>=0x80) )
				{
					if(o1<rot) rot-=0x280;
					else if(o1>rot) rot+=0x280;
				}

				// turn off wrapping
				if(wrap) rot-=0x8000;

				// now check the distances (store for later)
				dx = (xpos_max<<16)-xpos;
				dy = (ypos_max<<16)-ypos;
				dx>>=16;
				dy>>=16;

				// if we're in so many units of the target, signal it
				if( ( system && (dy<=6 && dy>=-8) && (dx<=126 && dx>=-128)) ||
						(!system && (dx<=6 && dx>=-8) && (dy<=126 && dy>=-128)) )
				{
					// announce our new destination and flag it
					xpos_max = xpos_new&0x7FFF;
					ypos_max = ypos_new;
					flags |= 0x08;
				}

				// update position
				xpos -= (ST010_Cos(rot) * 0x400 >> 15) * (speed >> 8) << 1;
				ypos -= (ST010_Sin(rot) * 0x400 >> 15) * (speed >> 8) << 1;

				// quirk: mask upper byte
				xpos &= 0x1FFFFFFF;
				ypos &= 0x1FFFFFFF;

				SRAM[0x00C0]=(uint8)(ypos_max);
				SRAM[0x00C1]=(uint8)(ypos_max >> 8);
				SRAM[0x00C2]=(uint8)(xpos_max);
				SRAM[0x00C3]=(uint8)(xpos_max >> 8);
				SRAM[0x00C4]=(uint8)(ypos);
				SRAM[0x00C5]=(uint8)(ypos >> 8);
				SRAM[0x00C6]=(uint8)(ypos >> 16);
				SRAM[0x00C7]=(uint8)(ypos >> 24);
				SRAM[0x00C8]=(uint8)(xpos);
				SRAM[0x00C9]=(uint8)(xpos >> 8);
				SRAM[0x00CA]=(uint8)(xpos >> 16);
				SRAM[0x00CB]=(uint8)(xpos >> 24);
				SRAM[0x00CC]=(uint8)(rot);
				SRAM[0x00CD]=(uint8)(rot >> 8);
				SRAM[0x00D4]=(uint8)(speed);
				SRAM[0x00D5]=(uint8)(speed >> 8);
				SRAM[0x00DC]=(uint8)(flags);
				SRAM[0x00DD]=(uint8)(flags >> 8);

				break;
			}

		default:
			printf("Unknown Op\n");
			break;
		}

		// lower signal: op processed
		ST010.op_reg=0;
		ST010.execute=0;
	}
}