2010-09-25 15:46:12 +00:00
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/***********************************************************************************
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com),
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Jerremy Koot (jkoot@snes9x.com)
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(c) Copyright 2002 - 2004 Matthew Kendora
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(c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org)
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(c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/)
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(c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net)
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(c) Copyright 2002 - 2006 funkyass (funkyass@spam.shaw.ca),
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Kris Bleakley (codeviolation@hotmail.com)
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(c) Copyright 2002 - 2010 Brad Jorsch (anomie@users.sourceforge.net),
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Nach (n-a-c-h@users.sourceforge.net),
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2011-04-11 19:51:20 +00:00
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(c) Copyright 2002 - 2011 zones (kasumitokoduck@yahoo.com)
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2010-09-25 15:46:12 +00:00
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(c) Copyright 2006 - 2007 nitsuja
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2017-11-17 22:00:58 +00:00
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(c) Copyright 2009 - 2017 BearOso,
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2010-09-25 15:46:12 +00:00
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OV2
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2017-11-17 22:00:58 +00:00
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(c) Copyright 2017 qwertymodo
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(c) Copyright 2011 - 2017 Hans-Kristian Arntzen,
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2016-10-15 16:31:26 +00:00
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Daniel De Matteis
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(Under no circumstances will commercial rights be given)
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2010-09-25 15:46:12 +00:00
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BS-X C emulator code
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(c) Copyright 2005 - 2006 Dreamer Nom,
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zones
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C4 x86 assembler and some C emulation code
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(c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com),
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Nach,
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zsKnight (zsknight@zsnes.com)
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C4 C++ code
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(c) Copyright 2003 - 2006 Brad Jorsch,
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Nach
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DSP-1 emulator code
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(c) Copyright 1998 - 2006 _Demo_,
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Andreas Naive (andreasnaive@gmail.com),
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Gary Henderson,
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Ivar (ivar@snes9x.com),
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John Weidman,
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Kris Bleakley,
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Matthew Kendora,
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Nach,
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neviksti (neviksti@hotmail.com)
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DSP-2 emulator code
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(c) Copyright 2003 John Weidman,
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Kris Bleakley,
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Lord Nightmare (lord_nightmare@users.sourceforge.net),
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Matthew Kendora,
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neviksti
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DSP-3 emulator code
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(c) Copyright 2003 - 2006 John Weidman,
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Kris Bleakley,
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Lancer,
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z80 gaiden
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DSP-4 emulator code
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(c) Copyright 2004 - 2006 Dreamer Nom,
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John Weidman,
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Kris Bleakley,
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Nach,
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z80 gaiden
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OBC1 emulator code
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(c) Copyright 2001 - 2004 zsKnight,
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pagefault (pagefault@zsnes.com),
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Kris Bleakley
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Ported from x86 assembler to C by sanmaiwashi
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SPC7110 and RTC C++ emulator code used in 1.39-1.51
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(c) Copyright 2002 Matthew Kendora with research by
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zsKnight,
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John Weidman,
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Dark Force
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SPC7110 and RTC C++ emulator code used in 1.52+
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(c) Copyright 2009 byuu,
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neviksti
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S-DD1 C emulator code
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(c) Copyright 2003 Brad Jorsch with research by
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Andreas Naive,
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John Weidman
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S-RTC C emulator code
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(c) Copyright 2001 - 2006 byuu,
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John Weidman
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ST010 C++ emulator code
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(c) Copyright 2003 Feather,
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John Weidman,
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Kris Bleakley,
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Matthew Kendora
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Super FX x86 assembler emulator code
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(c) Copyright 1998 - 2003 _Demo_,
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pagefault,
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zsKnight
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Super FX C emulator code
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(c) Copyright 1997 - 1999 Ivar,
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Gary Henderson,
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John Weidman
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Sound emulator code used in 1.5-1.51
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(c) Copyright 1998 - 2003 Brad Martin
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(c) Copyright 1998 - 2006 Charles Bilyue'
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Sound emulator code used in 1.52+
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(c) Copyright 2004 - 2007 Shay Green (gblargg@gmail.com)
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2016-10-07 17:47:07 +00:00
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S-SMP emulator code used in 1.54+
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(c) Copyright 2016 byuu
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2010-09-25 15:46:12 +00:00
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SH assembler code partly based on x86 assembler code
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(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
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2xSaI filter
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(c) Copyright 1999 - 2001 Derek Liauw Kie Fa
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HQ2x, HQ3x, HQ4x filters
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(c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com)
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NTSC filter
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(c) Copyright 2006 - 2007 Shay Green
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GTK+ GUI code
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2017-11-17 22:00:58 +00:00
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(c) Copyright 2004 - 2017 BearOso
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2010-09-25 15:46:12 +00:00
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Win32 GUI code
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(c) Copyright 2003 - 2006 blip,
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funkyass,
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Matthew Kendora,
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Nach,
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nitsuja
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2017-11-17 22:00:58 +00:00
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(c) Copyright 2009 - 2017 OV2
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2010-09-25 15:46:12 +00:00
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Mac OS GUI code
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(c) Copyright 1998 - 2001 John Stiles
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2011-04-11 19:51:20 +00:00
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(c) Copyright 2001 - 2011 zones
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2010-09-25 15:46:12 +00:00
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2016-10-15 16:31:26 +00:00
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Libretro port
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2017-11-17 22:00:58 +00:00
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(c) Copyright 2011 - 2017 Hans-Kristian Arntzen,
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2016-10-15 16:31:26 +00:00
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Daniel De Matteis
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(Under no circumstances will commercial rights be given)
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2010-09-25 15:46:12 +00:00
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Specific ports contains the works of other authors. See headers in
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individual files.
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Snes9x homepage: http://www.snes9x.com/
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Permission to use, copy, modify and/or distribute Snes9x in both binary
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and source form, for non-commercial purposes, is hereby granted without
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fee, providing that this license information and copyright notice appear
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with all copies and any derived work.
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This software is provided 'as-is', without any express or implied
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warranty. In no event shall the authors be held liable for any damages
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arising from the use of this software or it's derivatives.
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Snes9x is freeware for PERSONAL USE only. Commercial users should
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seek permission of the copyright holders first. Commercial use includes,
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but is not limited to, charging money for Snes9x or software derived from
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Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
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using Snes9x as a promotion for your commercial product.
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The copyright holders request that bug fixes and improvements to the code
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should be forwarded to them so everyone can benefit from the modifications
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in future versions.
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Super NES and Super Nintendo Entertainment System are trademarks of
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Nintendo Co., Limited and its subsidiary companies.
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***********************************************************************************/
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#include "snes9x.h"
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#include "memmap.h"
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#include "seta.h"
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static int line; // line counter
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uint8 S9xGetST018 (uint32 Address)
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{
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uint8 t = 0;
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uint16 address = (uint16) Address & 0xFFFF;
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line++;
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// these roles may be flipped
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// op output
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if (address == 0x3804)
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{
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if (ST018.out_count)
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{
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t = (uint8) ST018.output[ST018.out_index];
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ST018.out_index++;
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if (ST018.out_count == ST018.out_index)
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ST018.out_count = 0;
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}
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else
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t = 0x81;
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}
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// status register
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else
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if (address == 0x3800)
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t = ST018.status;
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#ifdef DEBUGGER
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printf("ST018 R: %06X %02X\n", Address, t);
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#endif
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return (t);
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}
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void S9xSetST018 (uint8 Byte, uint32 Address)
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{
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static bool reset = false;
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uint16 address = (uint16) Address & 0xFFFF;
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#ifdef DEBUGGER
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printf("ST018 W: %06X %02X\n", Address, Byte);
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#endif
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line++;
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if (!reset)
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{
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// bootup values
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ST018.waiting4command = true;
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ST018.part_command = 0;
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reset = true;
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}
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Memory.SRAM[address] = Byte;
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// default status for now
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ST018.status = 0x00;
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// op data goes through this address
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if (address == 0x3804)
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{
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// check for new commands: 3 bytes length
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if (ST018.waiting4command && ST018.part_command == 2)
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{
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ST018.waiting4command = false;
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ST018.in_index = 0;
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ST018.out_index = 0;
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ST018.part_command = 0; // 3-byte commands
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ST018.pass = 0; // data streams into the chip
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ST018.command <<= 8;
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ST018.command |= Byte;
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switch (ST018.command & 0xFFFFFF)
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{
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case 0x0100: ST018.in_count = 0; break;
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case 0xFF00: ST018.in_count = 0; break;
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default: ST018.waiting4command = true; break;
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}
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}
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else
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if (ST018.waiting4command)
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{
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// 3-byte commands
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ST018.part_command++;
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ST018.command <<= 8;
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ST018.command |= Byte;
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}
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}
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// extra parameters
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else
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if (address == 0x3802)
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{
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ST018.parameters[ST018.in_index] = Byte;
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ST018.in_index++;
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}
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if (ST018.in_count == ST018.in_index)
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{
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// qctually execute the command
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ST018.waiting4command = true;
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ST018.in_index = 0;
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ST018.out_index = 0;
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switch (ST018.command)
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{
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// hardware check?
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case 0x0100:
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ST018.waiting4command = false;
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ST018.pass++;
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if (ST018.pass == 1)
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{
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ST018.in_count = 1;
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ST018.out_count = 2;
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// Overload's research
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ST018.output[0x00] = 0x81;
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ST018.output[0x01] = 0x81;
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}
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else
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{
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//ST018.in_count = 1;
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ST018.out_count = 3;
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// no reason to change this
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//ST018.output[0x00] = 0x81;
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//ST018.output[0x01] = 0x81;
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ST018.output[0x02] = 0x81;
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// done processing requests
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if (ST018.pass == 3)
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ST018.waiting4command = true;
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}
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break;
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// unknown: feels like a security detection
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// format identical to 0x0100
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case 0xFF00:
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ST018.waiting4command = false;
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ST018.pass++;
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if (ST018.pass == 1)
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{
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ST018.in_count = 1;
|
|
|
|
|
ST018.out_count = 2;
|
|
|
|
|
|
|
|
|
|
// Overload's research
|
|
|
|
|
ST018.output[0x00] = 0x81;
|
|
|
|
|
ST018.output[0x01] = 0x81;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
//ST018.in_count = 1;
|
|
|
|
|
ST018.out_count = 3;
|
|
|
|
|
|
|
|
|
|
// no reason to change this
|
|
|
|
|
//ST018.output[0x00] = 0x81;
|
|
|
|
|
//ST018.output[0x01] = 0x81;
|
|
|
|
|
ST018.output[0x02] = 0x81;
|
|
|
|
|
|
|
|
|
|
// done processing requests
|
|
|
|
|
if (ST018.pass == 3)
|
|
|
|
|
ST018.waiting4command = true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
