path: root/src/seta010.c

/*******************************************************************************
  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 2001 - 2004 John Weidman (jweidman@slip.net)

  (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),
                            funkyass (funkyass@spam.shaw.ca),
                            Joel Yliluoma (http://iki.fi/bisqwit/)
                            Kris Bleakley (codeviolation@hotmail.com),
                            Matthew Kendora,
                            Nach (n-a-c-h@users.sourceforge.net),
                            Peter Bortas (peter@bortas.org) and
                            zones (kasumitokoduck@yahoo.com)

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

  C4 C++ code
  (c) Copyright 2003 Brad Jorsch

  DSP-1 emulator code
  (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
                            John Weidman, neviksti (neviksti@hotmail.com),
                            Kris Bleakley, Andreas Naive

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

  OBC1 emulator code
  (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and
                            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, and Dark Force

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

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

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

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

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


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

  (c) Copyright 2014 - 2016 Daniel De Matteis. (UNDER NO CIRCUMSTANCE 
  WILL COMMERCIAL RIGHTS EVER BE APPROPRIATED TO ANY PARTY)


  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 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.

  Snes9x is freeware for PERSONAL USE only. Commercial users should
  seek permission of the copyright holders first. Commercial use includes
  charging money for Snes9x or software derived from Snes9x.

  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 "port.h"
#include "memmap.h"
#include "seta.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 & CPU.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 & CPU.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;
   }
}