-
Notifications
You must be signed in to change notification settings - Fork 0
/
65c816.h
122 lines (113 loc) · 3.72 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
/*
* 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() (Registers.PL |= IRQ)
#define ClearIRQ() (Registers.PL &= ~IRQ)
#define SetDecimal() (Registers.PL |= Decimal)
#define ClearDecimal() (Registers.PL &= ~Decimal)
#define SetIndex() (Registers.PL |= IndexFlag)
#define ClearIndex() (Registers.PL &= ~IndexFlag)
#define SetMemory() (Registers.PL |= MemoryFlag)
#define ClearMemory() (Registers.PL &= ~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() (Registers.PL & IRQ)
#define CheckDecimal() (Registers.PL & Decimal)
#define CheckIndex() (Registers.PL & IndexFlag)
#define CheckMemory() (Registers.PL & MemoryFlag)
#define CheckOverflow() (ICPU._Overflow)
#define CheckNegative() (ICPU._Negative & 0x80)
#define CheckEmulation() (Registers.P.W & Emulation)
#define ClearFlags(f) (Registers.P.W &= ~(f))
#define SetFlags(f) (Registers.P.W |= (f))
#define CheckFlag(f) (Registers.PL & (f))
typedef union
{
#ifdef LSB_FIRST
struct { uint8 l,h; } PACKING B;
#else
struct { uint8 h,l; } PACKING B;
#endif
uint16 W;
} ALIGN_BY_ONE pair;
struct SRegisters{
uint8 PB;
uint8 DB;
pair P;
pair A;
pair D;
pair X;
pair S;
pair Y;
uint16 PC;
} PACKING;
#define Registers CPU.Regs
#endif