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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 716 | lvd | 1 | #ifndef _Z80_DEFS_H_INCLUDED |
| 2 | #define _Z80_DEFS_H_INCLUDED |
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| 3 | |||
| 4 | #include <stddef.h> |
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| 784 | DimkaM | 5 | #include <stdint.h> |
| 716 | lvd | 6 | #include "../sysdefs.h" |
| 7 | struct Z80; |
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| 8 | |||
| 9 | #define Z80FAST fastcall |
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| 10 | |||
| 11 | #ifdef _MSC_VER |
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| 12 | #define Z80INLINE forceinline // time-critical inlines |
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| 13 | #else |
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| 14 | #define Z80INLINE inline |
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| 15 | #endif |
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| 16 | |||
| 17 | typedef void (Z80FAST *STEPFUNC)(Z80*); |
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| 18 | #define Z80OPCODE void Z80FAST |
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| 19 | typedef unsigned char (Z80FAST *LOGICFUNC)(Z80*, unsigned char byte); |
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| 20 | #define Z80LOGIC unsigned char Z80FAST |
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| 21 | |||
| 22 | struct TZ80State |
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| 23 | { |
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| 24 | unsigned t; // Текущий такт процессора внутри spectrum кадра [0..conf.frame) |
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| 25 | /*------------------------------*/ |
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| 26 | union |
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| 27 | { |
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| 28 | unsigned pc; |
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| 29 | struct |
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| 30 | { |
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| 31 | unsigned char pcl; |
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| 32 | unsigned char pch; |
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| 33 | }; |
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| 34 | }; |
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| 35 | union |
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| 36 | { |
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| 37 | unsigned sp; |
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| 38 | struct |
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| 39 | { |
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| 40 | unsigned char spl; |
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| 41 | unsigned char sph; |
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| 42 | }; |
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| 43 | }; |
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| 44 | union |
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| 45 | { |
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| 46 | unsigned ir_; |
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| 47 | struct |
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| 48 | { |
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| 49 | unsigned char r_low; |
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| 50 | unsigned char i; |
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| 51 | }; |
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| 52 | }; |
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| 53 | union |
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| 54 | { |
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| 55 | unsigned int_flags; |
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| 56 | struct |
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| 57 | { |
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| 58 | unsigned char r_hi; |
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| 59 | unsigned char iff1; |
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| 60 | unsigned char iff2; |
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| 61 | unsigned char halted; |
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| 62 | }; |
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| 63 | }; |
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| 64 | /*------------------------------*/ |
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| 65 | union |
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| 66 | { |
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| 67 | unsigned bc; |
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| 68 | unsigned short bc16; |
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| 69 | struct |
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| 70 | { |
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| 71 | unsigned char c; |
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| 72 | unsigned char b; |
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| 784 | DimkaM | 73 | u8 trash; |
| 716 | lvd | 74 | }; |
| 75 | }; |
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| 76 | union |
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| 77 | { |
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| 78 | unsigned de; |
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| 79 | struct |
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| 80 | { |
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| 81 | unsigned char e; |
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| 82 | unsigned char d; |
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| 83 | }; |
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| 84 | }; |
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| 85 | union |
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| 86 | { |
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| 87 | unsigned hl; |
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| 88 | struct |
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| 89 | { |
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| 90 | unsigned char l; |
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| 91 | unsigned char h; |
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| 92 | }; |
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| 93 | }; |
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| 94 | union |
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| 95 | { |
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| 96 | unsigned af; |
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| 97 | struct |
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| 98 | { |
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| 99 | unsigned char f; |
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| 100 | unsigned char a; |
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| 101 | }; |
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| 102 | }; |
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| 103 | /*------------------------------*/ |
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| 104 | union |
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| 105 | { |
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| 106 | unsigned ix; |
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| 107 | struct |
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| 108 | { |
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| 109 | unsigned char xl; |
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| 110 | unsigned char xh; |
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| 111 | }; |
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| 112 | }; |
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| 113 | union |
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| 114 | { |
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| 115 | unsigned iy; |
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| 116 | struct |
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| 117 | { |
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| 118 | unsigned char yl; |
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| 119 | unsigned char yh; |
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| 120 | }; |
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| 121 | }; |
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| 122 | /*------------------------------*/ |
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| 123 | struct |
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| 124 | { |
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| 125 | union |
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| 126 | { |
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| 127 | unsigned bc; |
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| 128 | struct |
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| 129 | { |
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| 130 | unsigned char c; |
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| 131 | unsigned char b; |
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| 132 | }; |
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| 133 | }; |
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| 134 | union |
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| 135 | { |
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| 136 | unsigned de; |
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| 137 | struct |
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| 138 | { |
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| 139 | unsigned char e; |
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| 140 | unsigned char d; |
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| 141 | }; |
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| 142 | }; |
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| 143 | union |
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| 144 | { |
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| 145 | unsigned hl; |
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| 146 | struct |
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| 147 | { |
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| 148 | unsigned char l; |
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| 149 | unsigned char h; |
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| 150 | }; |
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| 151 | }; |
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| 152 | union |
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| 153 | { |
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| 154 | unsigned af; |
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| 155 | struct |
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| 156 | { |
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| 157 | unsigned char f; |
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| 158 | unsigned char a; |
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| 159 | }; |
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| 160 | }; |
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| 161 | } alt; |
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| 162 | union |
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| 163 | { |
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| 164 | unsigned memptr; // undocumented register |
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| 165 | struct |
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| 166 | { |
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| 167 | unsigned char meml; |
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| 168 | unsigned char memh; |
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| 169 | }; |
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| 170 | }; |
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| 171 | unsigned eipos, haltpos; |
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| 172 | /*------------------------------*/ |
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| 173 | unsigned char im; |
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| 759 | dimkam | 174 | unsigned char nmi_in_progress; |
| 716 | lvd | 175 | }; |
| 176 | |||
| 177 | typedef u8 (__fastcall * TXm)(u32 addr); |
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| 178 | typedef u8 (__fastcall * TRm)(u32 addr); |
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| 179 | typedef void (__fastcall * TWm)(u32 addr, u8 val); |
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| 180 | |||
| 181 | struct TMemIf |
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| 182 | { |
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| 183 | TXm xm; |
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| 184 | TRm rm; |
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| 185 | TWm wm; |
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| 186 | }; |
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| 187 | |||
| 188 | |||
| 189 | struct Z80 : public TZ80State |
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| 190 | { |
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| 191 | unsigned char tmp0, tmp1, tmp3; |
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| 192 | unsigned short last_branch; |
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| 193 | unsigned trace_curs, trace_top, trace_mode; |
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| 194 | unsigned mem_curs, mem_top, mem_second; |
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| 195 | unsigned pc_trflags; |
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| 196 | unsigned nextpc; |
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| 197 | unsigned dbg_stophere; |
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| 198 | unsigned dbg_stopsp; |
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| 199 | unsigned dbg_loop_r1; |
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| 200 | unsigned dbg_loop_r2; |
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| 201 | unsigned char dbgchk; // Признак наличия активных брекпоинтов |
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| 202 | bool int_pend; // На входе int есть активное прерывание |
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| 203 | bool int_gate; // Разрешение внешних прерываний (1-разрешены/0 - запрещены) |
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| 204 | |||
| 205 | #define MAX_CBP 16 |
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| 206 | uintptr_t cbp[MAX_CBP][128]; // Условия для условных брекпоинтов |
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| 207 | unsigned cbpn; |
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| 208 | |||
| 209 | i64 debug_last_t; // used to find time delta |
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| 210 | u32 tpi; // Число тактов между прерываниями |
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| 211 | u32 trpc[40]; |
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| 212 | // typedef u8 (__fastcall * TRmDbg)(u32 addr); |
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| 213 | // typedef u8 *(__fastcall * TMemDbg)(u32 addr); |
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| 214 | // typedef void (__fastcall * TWmDbg)(u32 addr, u8 val); |
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| 215 | typedef void (__cdecl *TBankNames)(int i, char *Name); |
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| 216 | typedef void (Z80FAST * TStep)(); |
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| 217 | typedef i64 (__cdecl * TDelta)(); |
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| 218 | typedef void (__cdecl * TSetLastT)(); |
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| 219 | // TRmDbg DirectRm; // direct read memory in debuger |
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| 220 | // TWmDbg DirectWm; // direct write memory in debuger |
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| 221 | // TMemDbg DirectMem; // get direct memory pointer in debuger |
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| 222 | u32 Idx; // Индекс в массиве процессоров |
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| 223 | TBankNames BankNames; |
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| 224 | TStep Step; |
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| 225 | TDelta Delta; |
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| 226 | TSetLastT SetLastT; |
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| 227 | u8 *membits; |
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| 228 | u8 dbgbreak; |
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| 229 | const TMemIf *FastMemIf; // Быстрый интерфес памяти |
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| 230 | const TMemIf *DbgMemIf; // Интерфейс памяти для поддержки отладчика (брекпоинты на доступ к памяти) |
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| 231 | const TMemIf *MemIf; // Текущий активный интерфейс памяти |
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| 232 | |||
| 233 | void reset() { int_flags = ir_ = pc = 0; im = 0; last_branch = 0; int_pend = false; int_gate = true; } |
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| 234 | Z80(u32 Idx, TBankNames BankNames, TStep Step, TDelta Delta, |
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| 235 | TSetLastT SetLastT, u8 *membits, const TMemIf *FastMemIf, const TMemIf *DbgMemIf) : |
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| 236 | Idx(Idx), |
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| 237 | BankNames(BankNames), |
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| 238 | Step(Step), Delta(Delta), SetLastT(SetLastT), membits(membits), |
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| 239 | FastMemIf(FastMemIf), DbgMemIf(DbgMemIf) |
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| 240 | { |
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| 241 | MemIf = FastMemIf; |
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| 242 | tpi = 0; |
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| 243 | dbgbreak = 0; |
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| 244 | dbgchk = 0; |
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| 245 | debug_last_t = 0; |
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| 246 | trace_curs = trace_top = (unsigned)-1; trace_mode = 0; |
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| 247 | mem_curs = mem_top = 0; |
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| 248 | pc_trflags = nextpc = 0; |
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| 249 | dbg_stophere = dbg_stopsp = (unsigned)-1; |
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| 250 | dbg_loop_r1 = 0; |
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| 251 | dbg_loop_r2 = 0xFFFF; |
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| 252 | int_pend = false; |
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| 253 | int_gate = true; |
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| 254 | nmi_in_progress = false; |
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| 255 | } |
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| 256 | virtual ~Z80() { } |
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| 257 | u32 GetIdx() const { return Idx; } |
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| 258 | void SetTpi(u32 Tpi) { tpi = Tpi; } |
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| 259 | |||
| 260 | void SetFastMemIf() { MemIf = FastMemIf; } |
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| 261 | void SetDbgMemIf() { MemIf = DbgMemIf; } |
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| 262 | |||
| 263 | u8 DirectRm(unsigned addr) const { return *DirectMem(addr); } // direct read memory in debuger |
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| 264 | void DirectWm(unsigned addr, u8 val) { *DirectMem(addr) = val; } // direct write memory in debuger |
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| 265 | /* |
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| 266 | virtual unsigned char rm(unsigned addr) = 0; |
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| 267 | virtual void wm(unsigned addr, unsigned char val) = 0; |
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| 268 | */ |
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| 269 | virtual u8 *DirectMem(unsigned addr) const = 0; // get direct memory pointer in debuger |
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| 270 | |||
| 271 | virtual unsigned char in(unsigned port) = 0; |
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| 272 | virtual void out(unsigned port, unsigned char val) = 0; |
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| 273 | virtual unsigned char m1_cycle() = 0; // [vv] Не зависит от процессора (вынести в библиотеку) |
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| 274 | virtual u8 IntVec() = 0; // Функция возвращающая значение вектора прерывания для im2 |
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| 275 | virtual void CheckNextFrame() = 0; // Проверка и обновления счетчика кадров и тактов внутри прерывания |
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| 276 | virtual void retn() = 0; // Вызывается в конце инструкции retn (должна сбрасывать флаг nmi_in_progress и обновлять раскладку памяти) |
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| 277 | }; |
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| 278 | |||
| 279 | #define CF 0x01 |
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| 280 | #define NF 0x02 |
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| 281 | #define PV 0x04 |
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| 282 | #define F3 0x08 |
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| 283 | #define HF 0x10 |
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| 284 | #define F5 0x20 |
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| 285 | #define ZF 0x40 |
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| 286 | #define SF 0x80 |
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| 287 | |||
| 288 | #endif // _Z80_DEFS_H_INCLUDED |