-
Notifications
You must be signed in to change notification settings - Fork 17
/
65c816.h
155 lines (145 loc) · 4.3 KB
/
65c816.h
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
/*
* Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
*
* (c) Copyright 1996 - 2001 Gary Henderson ([email protected]) and
* Jerremy Koot ([email protected])
*
* Super FX C emulator code
* (c) Copyright 1997 - 1999 Ivar ([email protected]) 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 ([email protected]).
*
* 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 _65c816_h_
#define _65c816_h_
#define AL A.B.l
#define AH A.B.h
#define XL X.B.l
#define XH X.B.h
#define YL Y.B.l
#define YH Y.B.h
#define SL S.B.l
#define SH S.B.h
#define DL D.B.l
#define DH D.B.h
#define PL P.B.l
#define PH P.B.h
#define Carry 1
#define Zero 2
#define IRQ 4
#define Decimal 8
#define IndexFlag 16
#define MemoryFlag 32
#define Overflow 64
#define Negative 128
#define Emulation 256
#define CLEARCARRY() (icpu->_Carry = 0)
#define SETCARRY() (icpu->_Carry = 1)
#define SETZERO() (icpu->_Zero = 0)
#define CLEARZERO() (icpu->_Zero = 1)
#define SETIRQ_OP() (reg->P.W |= IRQ)
#define SETIRQ() (Registers.P.W |= IRQ)
#define CLEARIRQ() (reg->P.W &= ~IRQ)
#define SETDECIMAL() (reg->P.W |= Decimal)
#define CLEARDECIMAL() (Registers.P.W &= ~Decimal)
#define CLEARDECIMAL_OP() (reg->P.W &= ~Decimal)
#define SETINDEX() ( (reg->P.W |= IndexFlag)
#define CLEARINDEX() (reg->P.W &= ~IndexFlag)
#define SETMEMORY() (reg->P.W |= MemoryFlag)
#define CLEARMEMORY() (reg->P.W &= ~MemoryFlag)
#define SETOVERFLOW() (icpu->_Overflow = 1)
#define CLEAROVERFLOW() (icpu->_Overflow = 0)
#define SETNEGATIVE() (icpu->_Negative = 0x80)
#define CLEARNEGATIVE() (icpu->_Negative = 0)
#define CHECKZERO() (icpu->_Zero == 0)
#define CHECKCARRY() (icpu->_Carry)
#define CHECKIRQ() (reg->P.W & IRQ)
#define CHECKDECIMAL() (reg->P.W & Decimal)
#define CHECKINDEX() (reg->P.W & IndexFlag)
#define CHECKMEMORY() (reg->P.W & MemoryFlag)
#define CHECKOVERFLOW() (icpu->_Overflow)
#define CHECKNEGATIVE() (icpu->_Negative & 0x80)
#define CHECKEMULATION() (Registers.P.W & Emulation)
#define CHECKEMULATION_OP() (reg->P.W & Emulation)
#define CLEARFLAGS(f) (Registers.P.W &= ~(f))
#define SETFLAGS(f) (Registers.P.W |= (f))
#define SETFLAGS_OP(f) (reg->P.W |= (f))
#define CHECKFLAG(f) (reg->PL & (f))
typedef union
{
#ifdef LSB_FIRST
struct { uint8 l,h; } B;
#else
struct { uint8 h,l; } B;
#endif
uint16 W;
} pair;
struct SRegisters{
uint16_32 PC;
uint8_32 PB;
uint8_32 DB;
pair P;
pair A;
pair D;
pair S;
pair X;
pair Y;
};
/*
struct SRegisters{
uint8 PB;
uint8 DB;
pair P;
pair A;
pair D;
pair S;
pair X;
pair Y;
uint16 PC;
};
*/
struct SICPU
{
uint8 *Speed;
struct SOpcodes *S9xOpcodes;
uint8_32 _Carry;
uint8_32 _Zero;
uint8_32 _Negative;
uint8_32 _Overflow;
bool8_32 CPUExecuting;
uint32 ShiftedPB;
uint32 ShiftedDB;
uint32 Frame;
uint32 Scanline;
uint32 FrameAdvanceCount;
};
EXTERN_C struct SRegisters Registers;
#endif