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1 | /*****************************************************************************/\r |
2 | /* FAME Fast and Accurate Motorola 68000 Emulation Core */\r |
3 | /* (c) 2005 Oscar Orallo Pelaez */\r |
4 | /* Version: 1.24 */\r |
5 | /* Date: 08-20-2005 */\r |
6 | /* See FAME.HTML for documentation and license information */\r |
7 | /*****************************************************************************/\r |
8 | \r |
9 | #ifndef __FAME_H__\r |
10 | #define __FAME_H__\r |
11 | \r |
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12 | // uintptr_t\r |
13 | #include <stdlib.h>\r |
14 | #ifndef _MSC_VER\r |
15 | #include <stdint.h>\r |
16 | #endif\r |
17 | \r |
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18 | #ifdef __cplusplus\r |
19 | extern "C" {\r |
20 | #endif\r |
21 | \r |
22 | // PicoDrive hacks\r |
23 | #define FAMEC_FETCHBITS 8\r |
24 | #define M68K_FETCHBANK1 (1 << FAMEC_FETCHBITS)\r |
25 | \r |
26 | //#define M68K_RUNNING 0x01\r |
03e4f2a3 |
27 | #define FM68K_HALTED 0x80\r |
28 | //#define M68K_WAITING 0x04\r |
29 | //#define M68K_DISABLE 0x20\r |
30 | //#define M68K_FAULTED 0x40\r |
31 | #define FM68K_EMULATE_GROUP_0 0x02\r |
32 | #define FM68K_EMULATE_TRACE 0x08\r |
33 | #define FM68K_DO_TRACE 0x10\r |
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34 | \r |
35 | \r |
36 | /************************************/\r |
37 | /* General library defines */\r |
38 | /************************************/\r |
39 | \r |
40 | #ifndef M68K_OK\r |
41 | #define M68K_OK 0\r |
42 | #endif\r |
43 | #ifndef M68K_RUNNING\r |
44 | #define M68K_RUNNING 1\r |
45 | #endif\r |
46 | #ifndef M68K_NO_SUP_ADDR_SPACE\r |
47 | #define M68K_NO_SUP_ADDR_SPACE 2\r |
48 | #endif\r |
49 | #ifndef M68K_DOUBLE_BUS_FAULT\r |
50 | #define M68K_DOUBLE_BUS_FAULT -1\r |
51 | #endif\r |
52 | #ifndef M68K_INV_REG\r |
53 | #define M68K_INV_REG -1\r |
54 | #endif\r |
55 | \r |
56 | /* Hardware interrupt state */\r |
57 | \r |
58 | #ifndef M68K_IRQ_LEVEL_ERROR\r |
59 | #define M68K_IRQ_LEVEL_ERROR -1\r |
60 | #endif\r |
61 | #ifndef M68K_IRQ_INV_PARAMS\r |
62 | #define M68K_IRQ_INV_PARAMS -2\r |
63 | #endif\r |
64 | \r |
65 | /* Defines to specify hardware interrupt type */\r |
66 | \r |
67 | #ifndef M68K_AUTOVECTORED_IRQ\r |
68 | #define M68K_AUTOVECTORED_IRQ -1\r |
69 | #endif\r |
70 | #ifndef M68K_SPURIOUS_IRQ\r |
71 | #define M68K_SPURIOUS_IRQ -2\r |
72 | #endif\r |
73 | \r |
74 | #ifndef M68K_AUTO_LOWER_IRQ\r |
75 | #define M68K_AUTO_LOWER_IRQ 1\r |
76 | #endif\r |
77 | #ifndef M68K_MANUAL_LOWER_IRQ\r |
78 | #define M68K_MANUAL_LOWER_IRQ 0\r |
79 | #endif\r |
80 | \r |
81 | /* Defines to specify address space */\r |
82 | \r |
83 | #ifndef M68K_SUP_ADDR_SPACE\r |
84 | #define M68K_SUP_ADDR_SPACE 0\r |
85 | #endif\r |
86 | #ifndef M68K_USER_ADDR_SPACE\r |
87 | #define M68K_USER_ADDR_SPACE 2\r |
88 | #endif\r |
89 | #ifndef M68K_PROG_ADDR_SPACE\r |
90 | #define M68K_PROG_ADDR_SPACE 0\r |
91 | #endif\r |
92 | #ifndef M68K_DATA_ADDR_SPACE\r |
93 | #define M68K_DATA_ADDR_SPACE 1\r |
94 | #endif\r |
95 | \r |
96 | \r |
97 | /*******************/\r |
98 | /* Data definition */\r |
99 | /*******************/\r |
100 | \r |
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101 | typedef union\r |
102 | {\r |
103 | unsigned char B;\r |
104 | signed char SB;\r |
105 | unsigned short W;\r |
106 | signed short SW;\r |
107 | unsigned int D;\r |
108 | signed int SD;\r |
109 | } famec_union32;\r |
110 | \r |
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111 | /* M68K CPU CONTEXT */\r |
112 | typedef struct\r |
113 | {\r |
114 | unsigned int (*read_byte )(unsigned int a);\r |
115 | unsigned int (*read_word )(unsigned int a);\r |
116 | unsigned int (*read_long )(unsigned int a);\r |
117 | void (*write_byte)(unsigned int a,unsigned char d);\r |
118 | void (*write_word)(unsigned int a,unsigned short d);\r |
119 | void (*write_long)(unsigned int a,unsigned int d);\r |
120 | void (*reset_handler)(void);\r |
121 | void (*iack_handler)(unsigned level);\r |
122 | famec_union32 dreg[8];\r |
123 | famec_union32 areg[8];\r |
124 | unsigned asp;\r |
125 | unsigned pc;\r |
126 | unsigned char interrupts[8];\r |
127 | unsigned short sr;\r |
128 | unsigned short execinfo;\r |
129 | // PD extension\r |
130 | int io_cycle_counter; // cycles left\r |
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131 | \r |
132 | unsigned int Opcode;\r |
133 | signed int cycles_needed;\r |
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134 | \r |
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135 | unsigned short *PC;\r |
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136 | uintptr_t BasePC;\r |
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137 | unsigned int flag_C;\r |
138 | unsigned int flag_V;\r |
139 | unsigned int flag_NotZ;\r |
140 | unsigned int flag_N;\r |
141 | unsigned int flag_X;\r |
142 | unsigned int flag_T;\r |
143 | unsigned int flag_S;\r |
144 | unsigned int flag_I;\r |
145 | \r |
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146 | unsigned char not_polling;\r |
147 | unsigned char pad[3];\r |
148 | \r |
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149 | uintptr_t Fetch[M68K_FETCHBANK1];\r |
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150 | } M68K_CONTEXT;\r |
151 | \r |
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152 | typedef enum\r |
153 | {\r |
154 | fm68k_reason_emulate = 0,\r |
155 | fm68k_reason_init,\r |
156 | fm68k_reason_idle_install,\r |
157 | fm68k_reason_idle_remove,\r |
158 | } fm68k_call_reason;\r |
159 | \r |
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160 | /************************/\r |
161 | /* Function definition */\r |
162 | /************************/\r |
163 | \r |
164 | /* General purpose functions */\r |
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165 | void fm68k_init(void);\r |
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166 | int fm68k_reset(M68K_CONTEXT *ctx);\r |
167 | int fm68k_emulate(M68K_CONTEXT *ctx, int n, fm68k_call_reason reason);\r |
168 | int fm68k_would_interrupt(M68K_CONTEXT *ctx); // to be called from fm68k_emulate()\r |
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169 | \r |
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170 | unsigned int fm68k_get_pc(const M68K_CONTEXT *ctx);\r |
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171 | \r |
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172 | // PICODRIVE_HACK\r |
173 | int fm68k_idle_install(void);\r |
174 | int fm68k_idle_remove(void);\r |
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175 | \r |
176 | #ifdef __cplusplus\r |
177 | }\r |
178 | #endif\r |
179 | \r |
180 | #endif\r |