forked from Sunlitspace542/snes9x-neo
-
Notifications
You must be signed in to change notification settings - Fork 0
/
65c816.h
105 lines (94 loc) · 2.71 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
/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
#ifndef _65C816_H_
#define _65C816_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 SetCarry() (ICPU._Carry = 1)
#define ClearCarry() (ICPU._Carry = 0)
#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 CheckCarry() (ICPU._Carry)
#define CheckZero() (ICPU._Zero == 0)
#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 SetFlags(f) (Registers.P.W |= (f))
#define ClearFlags(f) (Registers.P.W &= ~(f))
#define CheckFlag(f) (Registers.PL & (f))
typedef union
{
#ifdef LSB_FIRST
struct { uint8 l, h; } B;
#else
struct { uint8 h, l; } B;
#endif
uint16 W;
} pair;
typedef union
{
#ifdef LSB_FIRST
struct { uint8 xPCl, xPCh, xPB, z; } B;
struct { uint16 xPC, d; } W;
#else
struct { uint8 z, xPB, xPCh, xPCl; } B;
struct { uint16 d, xPC; } W;
#endif
uint32 xPBPC;
} PC_t;
struct SRegisters
{
uint8 DB;
pair P;
pair A;
pair D;
pair S;
pair X;
pair Y;
PC_t PC;
};
#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 PBPC PC.xPBPC
#define PCw PC.W.xPC
#define PCh PC.B.xPCh
#define PCl PC.B.xPCl
#define PB PC.B.xPB
extern struct SRegisters Registers;
#endif