blob: 649d0ec9f912f2a7914086428138a19b4d03396e (
plain)
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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
* 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.
*/
#ifndef _CPUEXEC_H_
#define _CPUEXEC_H_
#include "ppu.h"
#include "memmap.h"
#include "65c816.h"
#define DO_HBLANK_CHECK() \
if (CPU.Cycles >= CPU.NextEvent) \
S9xDoHBlankProcessing ();
struct SOpcodes {
#ifdef __WIN32__
void (__cdecl *S9xOpcode)( void);
#else
void (*S9xOpcode)( void);
#endif
};
struct SICPU
{
uint8 *Speed;
struct SOpcodes *S9xOpcodes;
uint8 _Carry;
uint8 _Zero;
uint8 _Negative;
uint8 _Overflow;
bool8 CPUExecuting;
uint32 ShiftedPB;
uint32 ShiftedDB;
uint32 Frame;
uint32 Scanline;
uint32 FrameAdvanceCount;
};
START_EXTERN_C
void S9xMainLoop (void);
void S9xReset (void);
void S9xDoHBlankProcessing ();
void S9xClearIRQ (uint32);
void S9xSetIRQ (uint32);
extern struct SOpcodes S9xOpcodesM1X1 [256];
extern struct SOpcodes S9xOpcodesM1X0 [256];
extern struct SOpcodes S9xOpcodesM0X1 [256];
extern struct SOpcodes S9xOpcodesM0X0 [256];
#ifndef VAR_CYCLES
extern uint8 S9xE1M1X1 [256];
extern uint8 S9xE0M1X0 [256];
extern uint8 S9xE0M1X1 [256];
extern uint8 S9xE0M0X0 [256];
extern uint8 S9xE0M0X1 [256];
#endif
extern struct SICPU ICPU;
END_EXTERN_C
STATIC inline void CLEAR_IRQ_SOURCE (uint32 M)
{
CPU.IRQActive &= ~M;
if (!CPU.IRQActive)
CPU.Flags &= ~IRQ_PENDING_FLAG;
}
STATIC inline void S9xUnpackStatus()
{
ICPU._Zero = (Registers.PL & Zero) == 0;
ICPU._Negative = (Registers.PL & Negative);
ICPU._Carry = (Registers.PL & Carry);
ICPU._Overflow = (Registers.PL & Overflow) >> 6;
}
STATIC inline void S9xPackStatus()
{
Registers.PL &= ~(Zero | Negative | Carry | Overflow);
Registers.PL |= ICPU._Carry | ((ICPU._Zero == 0) << 1) |
(ICPU._Negative & 0x80) | (ICPU._Overflow << 6);
}
STATIC inline void S9xFixCycles ()
{
if (CheckEmulation ())
{
#ifndef VAR_CYCLES
ICPU.Speed = S9xE1M1X1;
#endif
ICPU.S9xOpcodes = S9xOpcodesM1X1;
}
else
if (CheckMemory ())
{
if (CheckIndex ())
{
#ifndef VAR_CYCLES
ICPU.Speed = S9xE0M1X1;
#endif
ICPU.S9xOpcodes = S9xOpcodesM1X1;
}
else
{
#ifndef VAR_CYCLES
ICPU.Speed = S9xE0M1X0;
#endif
ICPU.S9xOpcodes = S9xOpcodesM1X0;
}
}
else
{
if (CheckIndex ())
{
#ifndef VAR_CYCLES
ICPU.Speed = S9xE0M0X1;
#endif
ICPU.S9xOpcodes = S9xOpcodesM0X1;
}
else
{
#ifndef VAR_CYCLES
ICPU.Speed = S9xE0M0X0;
#endif
ICPU.S9xOpcodes = S9xOpcodesM0X0;
}
}
}
#define S9xReschedule() { \
uint8 which; \
long max; \
if (CPU.WhichEvent == HBLANK_START_EVENT || CPU.WhichEvent == HTIMER_AFTER_EVENT) { \
which = HBLANK_END_EVENT; \
max = Settings.H_Max; \
} else { \
which = HBLANK_START_EVENT; \
max = Settings.HBlankStart; \
} \
\
if (PPU.HTimerEnabled && (long) PPU.HTimerPosition < max && (long) PPU.HTimerPosition > CPU.NextEvent && \
(!PPU.VTimerEnabled || (PPU.VTimerEnabled && CPU.V_Counter == PPU.IRQVBeamPos))) { \
which = (long) PPU.HTimerPosition < Settings.HBlankStart ? HTIMER_BEFORE_EVENT : HTIMER_AFTER_EVENT; \
max = PPU.HTimerPosition; \
} \
CPU.NextEvent = max; \
CPU.WhichEvent = which; \
}
/*
extern "C" {
void asm_APU_EXECUTE(int Mode);
void asm_APU_EXECUTE2(void);
}*/
#define asm_APU_EXECUTE(MODE)\
{\
if (CPU.APU_APUExecuting == MODE) {\
if (Settings.asmspc700) {\
if(CPU.APU_Cycles < CPU.Cycles) {\
int cycles = CPU.Cycles - CPU.APU_Cycles;\
CPU.APU_Cycles += cycles - spc700_execute(cycles);\
}\
}\
else\
{\
while (CPU.APU_Cycles <= CPU.Cycles)\
{\
CPU.APU_Cycles += S9xAPUCycles [*IAPU.PC];\
(*S9xApuOpcodes[*IAPU.PC]) ();\
}\
}\
}\
}
#define asm_APU_EXECUTE2() \
{\
if (CPU.APU_APUExecuting == 1) {\
if (Settings.asmspc700) {\
if (CPU.APU_Cycles < CPU.NextEvent) {\
int cycles = CPU.NextEvent - CPU.APU_Cycles;\
CPU.APU_Cycles += cycles - spc700_execute(cycles);\
}\
}\
else\
{\
do\
{\
CPU.APU_Cycles += S9xAPUCycles [*IAPU.PC];\
(*S9xApuOpcodes[*IAPU.PC]) ();\
} while (CPU.APU_Cycles < CPU.NextEvent);\
}\
}\
}
#endif
|
