1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/*
* Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
*
* (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
* Jerremy Koot (jkoot@snes9x.com)
*
* Super FX C emulator code
* (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and
* Gary Henderson.
* Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
*
* DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
* C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
* C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com).
*
* DOS port code 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 "snes9x.h"
#include "memmap.h"
#include "ppu.h"
void S9xInitC4 ()
{
Memory.C4RAM = &Memory.FillRAM [0x6000];
}
uint8 S9xGetC4 (uint16 Address)
{
return (Memory.FillRAM [Address]);
}
static uint8 C4TestPattern [12 * 4] =
{
0x00, 0x00, 0x00, 0xff,
0xff, 0xff, 0x00, 0xff,
0x00, 0x00, 0x00, 0xff,
0xff, 0xff, 0x00, 0x00,
0xff, 0xff, 0x00, 0x00,
0x80, 0xff, 0xff, 0x7f,
0x00, 0x80, 0x00, 0xff,
0x7f, 0x00, 0xff, 0x7f,
0xff, 0x7f, 0xff, 0xff,
0x00, 0x00, 0x01, 0xff,
0xff, 0xfe, 0x00, 0x01,
0x00, 0xff, 0xfe, 0x00
};
uint32 C4Timer, C4Timer2;
uint32 C4sprites, C4ObjDisp, C4count;
void S9xC4ConvOAM ()
{
C4Timer = (C4Timer + 1) & 15;
C4Timer2 = (C4Timer2 + 1) & 7;
uint32 count = Memory.FillRAM [0x6620];
uint32 bgscrollx = READ_WORD (&Memory.FillRAM [0x6621]);
uint32 bgscrolly = READ_WORD (&Memory.FillRAM [0x6623]);
uint8 *C4usprptr = Memory.C4RAM + 0x200 + (C4ObjDisp >> 4);
uint8 *edi = Memory.C4RAM + C4ObjDisp;
uint8 *esi = Memory.C4RAM + 0x220;
}
void S9xC4ProcessSprites ()
{
C4sprites = Memory.FillRAM [0x6626];
C4ObjDisp = C4sprites * 4;
C4count = 32;
uint8 *p = Memory.C4RAM + C4ObjDisp + 1;
int i;
for (i = 128 - C4sprites; i > 0; p += 4, i--)
*p = 0xe0;
S9xC4ConvOAM ();
}
void S9xSetC4 (uint8 byte, uint16 Address)
{
int i;
Memory.FillRAM [Address] = byte;
if (Address == 0x7f4f)
{
#ifdef DEBUGGER
printf ("C4: %02x\n", byte);
#endif
switch (byte)
{
case 0x00: // Sprite
{
#ifdef DEBUGGER
printf ("C4 sprite: %02x\n", Memory.FillRAM [0x7f4d]);
#endif
switch (Memory.FillRAM [0x7f4d])
{
case 0x00: // Srpites
S9xC4ProcessSprites ();
break;
case 0x03: // Scale
case 0x05: // Lines
case 0x07: // Rotate
case 0x08: // Wireframe
case 0x0b: // Disintergrate
case 0x0c: // Bitmap
break;
default:
#ifdef DEBUGGER
printf ("Unknown C4 sprite command (%02x)\n", Memory.FillRAM [0x7f4d]);
#endif
break;
}
break;
}
case 0x01: // Wireframe
case 0x05: // Propulsion
case 0x0d: // Equate Velocity
case 0x10: // Polar to rectangluar
case 0x13: // ??
case 0x15: // Calc Distance
case 0x1f: // Calc Angle
case 0x22: // Line
case 0x2d: // Transform
break;
case 0x5c: // Immediate Reg
for (i = 0; i < 12 * 4; i++)
Memory.C4RAM [i] = C4TestPattern [i];
break;
case 0x89: // Immediate ROM
Memory.FillRAM [0x7f80] = 0x36;
Memory.FillRAM [0x7f81] = 0x43;
Memory.FillRAM [0x7f82] = 0x05;
break;
default:
#ifdef DEBUGGER
printf ("Unknown C4 command (%02x)\n", byte);
#endif
break;
}
}
}
|
