1 /*******************************************************************************
2 Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
4 (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and
5 Jerremy Koot (jkoot@snes9x.com)
7 (c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net)
9 (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),
10 funkyass (funkyass@spam.shaw.ca),
11 Joel Yliluoma (http://iki.fi/bisqwit/)
12 Kris Bleakley (codeviolation@hotmail.com),
14 Nach (n-a-c-h@users.sourceforge.net),
15 Peter Bortas (peter@bortas.org) and
16 zones (kasumitokoduck@yahoo.com)
18 C4 x86 assembler and some C emulation code
19 (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
20 _Demo_ (_demo_@zsnes.com), and Nach
23 (c) Copyright 2003 Brad Jorsch
26 (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
27 John Weidman, neviksti (neviksti@hotmail.com),
28 Kris Bleakley, Andreas Naive
31 (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
32 Lord Nightmare (lord_nightmare@users.sourceforge.net
35 (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and
37 Ported from x86 assembler to C by sanmaiwashi
39 SPC7110 and RTC C++ emulator code
40 (c) Copyright 2002 Matthew Kendora with research by
41 zsKnight, John Weidman, and Dark Force
44 (c) Copyright 2003 Brad Jorsch with research by
45 Andreas Naive and John Weidman
48 (c) Copyright 2001 John Weidman
50 ST010 C++ emulator code
51 (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora
53 Super FX x86 assembler emulator code
54 (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault
56 Super FX C emulator code
57 (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman
60 SH assembler code partly based on x86 assembler code
61 (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
64 Specific ports contains the works of other authors. See headers in
67 Snes9x homepage: http://www.snes9x.com
69 Permission to use, copy, modify and distribute Snes9x in both binary and
70 source form, for non-commercial purposes, is hereby granted without fee,
71 providing that this license information and copyright notice appear with
72 all copies and any derived work.
74 This software is provided 'as-is', without any express or implied
75 warranty. In no event shall the authors be held liable for any damages
76 arising from the use of this software.
78 Snes9x is freeware for PERSONAL USE only. Commercial users should
79 seek permission of the copyright holders first. Commercial use includes
80 charging money for Snes9x or software derived from Snes9x.
82 The copyright holders request that bug fixes and improvements to the code
83 should be forwarded to them so everyone can benefit from the modifications
86 Super NES and Super Nintendo Entertainment System are trademarks of
87 Nintendo Co., Limited and its subsidiary companies.
88 *******************************************************************************/
95 static int line; // line counter
98 uint8 S9xGetST018(uint32 Address)
101 uint16 address = (uint16) Address & 0xFFFF;
105 // these roles may be flipped
107 if (address == 0x3804)
111 t = (uint8) ST018.output [ST018.out_index];
113 if (ST018.out_count==ST018.out_index)
120 else if (address == 0x3800)
123 printf( "ST018 R: %06X %02X\n", Address, t);
128 void S9xSetST018(uint8 Byte, uint32 Address)
130 uint16 address = (uint16) Address&0xFFFF;
131 static bool reset = false;
133 printf( "ST018 W: %06X %02X\n", Address, Byte );
140 ST018.waiting4command = true;
141 ST018.part_command = 0;
145 Memory.SRAM[address]=Byte;
147 // default status for now
150 // op data goes through this address
153 // check for new commands: 3 bytes length
154 if(ST018.waiting4command && ST018.part_command==2)
156 ST018.waiting4command = false;
158 ST018.command |= Byte;
161 ST018.part_command = 0; // 3-byte commands
162 ST018.pass = 0; // data streams into the chip
163 switch(ST018.command & 0xFFFFFF)
165 case 0x0100: ST018.in_count = 0; break;
166 case 0xFF00: ST018.in_count = 0; break;
167 default: ST018.waiting4command = true; break;
170 else if(ST018.waiting4command)
173 ST018.part_command++;
175 ST018.command |= Byte;
179 else if (address==0x3802)
181 ST018.parameters[ST018.in_index] = Byte;
185 if (ST018.in_count==ST018.in_index)
187 // Actually execute the command
188 ST018.waiting4command = true;
191 switch (ST018.command)
195 ST018.waiting4command = false;
202 // Overload's research
203 ST018.output[0x00] = 0x81;
204 ST018.output[0x01] = 0x81;
208 //ST018.in_count = 1;
211 // no reason to change this
212 //ST018.output[0x00] = 0x81;
213 //ST018.output[0x01] = 0x81;
214 ST018.output[0x02] = 0x81;
216 // done processing requests
218 ST018.waiting4command = true;
222 // unknown: feels like a security detection
223 // format identical to 0x0100
225 ST018.waiting4command = false;
232 // Overload's research
233 ST018.output[0x00] = 0x81;
234 ST018.output[0x01] = 0x81;
238 //ST018.in_count = 1;
241 // no reason to change this
242 //ST018.output[0x00] = 0x81;
243 //ST018.output[0x01] = 0x81;
244 ST018.output[0x02] = 0x81;
246 // done processing requests
248 ST018.waiting4command = true;