| 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 |
| 12 | #ifdef __cplusplus\r |
| 13 | extern "C" {\r |
| 14 | #endif\r |
| 15 | \r |
| 16 | // PicoDrive hacks\r |
| 17 | #define FAMEC_FETCHBITS 8\r |
| 18 | #define M68K_FETCHBANK1 (1 << FAMEC_FETCHBITS)\r |
| 19 | \r |
| 20 | //#define M68K_RUNNING 0x01\r |
| 21 | #define FM68K_HALTED 0x80\r |
| 22 | //#define M68K_WAITING 0x04\r |
| 23 | //#define M68K_DISABLE 0x20\r |
| 24 | //#define M68K_FAULTED 0x40\r |
| 25 | #define FM68K_EMULATE_GROUP_0 0x02\r |
| 26 | #define FM68K_EMULATE_TRACE 0x08\r |
| 27 | #define FM68K_DO_TRACE 0x10\r |
| 28 | \r |
| 29 | \r |
| 30 | /************************************/\r |
| 31 | /* General library defines */\r |
| 32 | /************************************/\r |
| 33 | \r |
| 34 | #ifndef M68K_OK\r |
| 35 | #define M68K_OK 0\r |
| 36 | #endif\r |
| 37 | #ifndef M68K_RUNNING\r |
| 38 | #define M68K_RUNNING 1\r |
| 39 | #endif\r |
| 40 | #ifndef M68K_NO_SUP_ADDR_SPACE\r |
| 41 | #define M68K_NO_SUP_ADDR_SPACE 2\r |
| 42 | #endif\r |
| 43 | #ifndef M68K_DOUBLE_BUS_FAULT\r |
| 44 | #define M68K_DOUBLE_BUS_FAULT -1\r |
| 45 | #endif\r |
| 46 | #ifndef M68K_INV_REG\r |
| 47 | #define M68K_INV_REG -1\r |
| 48 | #endif\r |
| 49 | \r |
| 50 | /* Hardware interrupt state */\r |
| 51 | \r |
| 52 | #ifndef M68K_IRQ_LEVEL_ERROR\r |
| 53 | #define M68K_IRQ_LEVEL_ERROR -1\r |
| 54 | #endif\r |
| 55 | #ifndef M68K_IRQ_INV_PARAMS\r |
| 56 | #define M68K_IRQ_INV_PARAMS -2\r |
| 57 | #endif\r |
| 58 | \r |
| 59 | /* Defines to specify hardware interrupt type */\r |
| 60 | \r |
| 61 | #ifndef M68K_AUTOVECTORED_IRQ\r |
| 62 | #define M68K_AUTOVECTORED_IRQ -1\r |
| 63 | #endif\r |
| 64 | #ifndef M68K_SPURIOUS_IRQ\r |
| 65 | #define M68K_SPURIOUS_IRQ -2\r |
| 66 | #endif\r |
| 67 | \r |
| 68 | #ifndef M68K_AUTO_LOWER_IRQ\r |
| 69 | #define M68K_AUTO_LOWER_IRQ 1\r |
| 70 | #endif\r |
| 71 | #ifndef M68K_MANUAL_LOWER_IRQ\r |
| 72 | #define M68K_MANUAL_LOWER_IRQ 0\r |
| 73 | #endif\r |
| 74 | \r |
| 75 | /* Defines to specify address space */\r |
| 76 | \r |
| 77 | #ifndef M68K_SUP_ADDR_SPACE\r |
| 78 | #define M68K_SUP_ADDR_SPACE 0\r |
| 79 | #endif\r |
| 80 | #ifndef M68K_USER_ADDR_SPACE\r |
| 81 | #define M68K_USER_ADDR_SPACE 2\r |
| 82 | #endif\r |
| 83 | #ifndef M68K_PROG_ADDR_SPACE\r |
| 84 | #define M68K_PROG_ADDR_SPACE 0\r |
| 85 | #endif\r |
| 86 | #ifndef M68K_DATA_ADDR_SPACE\r |
| 87 | #define M68K_DATA_ADDR_SPACE 1\r |
| 88 | #endif\r |
| 89 | \r |
| 90 | \r |
| 91 | /*******************/\r |
| 92 | /* Data definition */\r |
| 93 | /*******************/\r |
| 94 | \r |
| 95 | typedef union\r |
| 96 | {\r |
| 97 | unsigned char B;\r |
| 98 | signed char SB;\r |
| 99 | unsigned short W;\r |
| 100 | signed short SW;\r |
| 101 | unsigned int D;\r |
| 102 | signed int SD;\r |
| 103 | } famec_union32;\r |
| 104 | \r |
| 105 | /* M68K CPU CONTEXT */\r |
| 106 | typedef struct\r |
| 107 | {\r |
| 108 | unsigned int (*read_byte )(unsigned int a);\r |
| 109 | unsigned int (*read_word )(unsigned int a);\r |
| 110 | unsigned int (*read_long )(unsigned int a);\r |
| 111 | void (*write_byte)(unsigned int a,unsigned char d);\r |
| 112 | void (*write_word)(unsigned int a,unsigned short d);\r |
| 113 | void (*write_long)(unsigned int a,unsigned int d);\r |
| 114 | void (*reset_handler)(void);\r |
| 115 | void (*iack_handler)(unsigned level);\r |
| 116 | famec_union32 dreg[8];\r |
| 117 | famec_union32 areg[8];\r |
| 118 | unsigned asp;\r |
| 119 | unsigned pc;\r |
| 120 | unsigned char interrupts[8];\r |
| 121 | unsigned short sr;\r |
| 122 | unsigned short execinfo;\r |
| 123 | // PD extension\r |
| 124 | int io_cycle_counter; // cycles left\r |
| 125 | \r |
| 126 | unsigned int Opcode;\r |
| 127 | signed int cycles_needed;\r |
| 128 | \r |
| 129 | unsigned short *PC;\r |
| 130 | unsigned long BasePC;\r |
| 131 | unsigned int flag_C;\r |
| 132 | unsigned int flag_V;\r |
| 133 | unsigned int flag_NotZ;\r |
| 134 | unsigned int flag_N;\r |
| 135 | unsigned int flag_X;\r |
| 136 | unsigned int flag_T;\r |
| 137 | unsigned int flag_S;\r |
| 138 | unsigned int flag_I;\r |
| 139 | \r |
| 140 | unsigned char not_polling;\r |
| 141 | unsigned char pad[3];\r |
| 142 | \r |
| 143 | unsigned long Fetch[M68K_FETCHBANK1];\r |
| 144 | } M68K_CONTEXT;\r |
| 145 | \r |
| 146 | extern M68K_CONTEXT *g_m68kcontext;\r |
| 147 | \r |
| 148 | /************************/\r |
| 149 | /* Function definition */\r |
| 150 | /************************/\r |
| 151 | \r |
| 152 | /* General purpose functions */\r |
| 153 | void fm68k_init(void);\r |
| 154 | int fm68k_reset(void);\r |
| 155 | int fm68k_emulate(int n, int idle_mode);\r |
| 156 | int fm68k_would_interrupt(void); // to be called from fm68k_emulate()\r |
| 157 | \r |
| 158 | unsigned fm68k_get_pc(M68K_CONTEXT *context);\r |
| 159 | \r |
| 160 | \r |
| 161 | #ifdef __cplusplus\r |
| 162 | }\r |
| 163 | #endif\r |
| 164 | \r |
| 165 | #endif\r |