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comparison z80inst.c @ 199:69585e7d474f

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Add initial stab at Z80 decoder and disassembler
author Mike Pavone <pavone@retrodev.com>
date Sun, 20 Jan 2013 19:11:24 -0800
parents
children d3066ceb29d1
comparison
equal deleted inserted replaced
198:209a37eed3e7 199:69585e7d474f
1 #include "z80inst.h"
2 #include <string.h>
3 #include <stdio.h>
4
5 z80inst z80_tbl_a[256] = {
6 //0
7 {Z80_NOP, Z80_UNUSED, Z80_UNUSED, Z80_UNUSED, 0},
8 {Z80_LD, Z80_BC, Z80_IMMED, Z80_UNUSED, 0},
9 {Z80_LD, Z80_A, Z80_REG_INDIRECT | Z80_DIR, Z80_BC, 0},
10 {Z80_INC, Z80_BC, Z80_UNUSED, Z80_UNUSED, 0},
11 {Z80_INC, Z80_B, Z80_UNUSED, Z80_UNUSED, 0},
12 {Z80_DEC, Z80_B, Z80_UNUSED, Z80_UNUSED, 0},
13 {Z80_LD, Z80_B, Z80_IMMED, Z80_UNUSED, 0},
14 {Z80_RLC, Z80_A, Z80_UNUSED, Z80_UNUSED, 0},
15 {Z80_EX, Z80_AF, Z80_REG, Z80_AF, 0},
16 {Z80_ADD, Z80_HL, Z80_REG, Z80_BC, 0},
17 {Z80_LD, Z80_A, Z80_REG_INDIRECT, Z80_BC, 0},
18 {Z80_DEC, Z80_BC, Z80_UNUSED, Z80_UNUSED, 0},
19 {Z80_INC, Z80_C, Z80_UNUSED, Z80_UNUSED, 0},
20 {Z80_DEC, Z80_C, Z80_UNUSED, Z80_UNUSED, 0},
21 {Z80_LD, Z80_C, Z80_IMMED, Z80_UNUSED, 0},
22 {Z80_RRC, Z80_A, Z80_UNUSED, Z80_UNUSED, 0},
23 //1
24 {Z80_DJNZ, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0},
25 {Z80_LD, Z80_DE, Z80_IMMED, Z80_UNUSED, 0},
26 {Z80_LD, Z80_A, Z80_REG_INDIRECT | Z80_DIR, Z80_DE, 0},
27 {Z80_INC, Z80_DE, Z80_UNUSED, Z80_UNUSED, 0},
28 {Z80_INC, Z80_D, Z80_UNUSED, Z80_UNUSED, 0},
29 {Z80_DEC, Z80_D, Z80_UNUSED, Z80_UNUSED, 0},
30 {Z80_LD, Z80_D, Z80_IMMED, Z80_UNUSED, 0},
31 {Z80_RL, Z80_A, Z80_UNUSED, Z80_UNUSED, 0},
32 {Z80_JR, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0},
33 {Z80_ADD, Z80_HL, Z80_REG, Z80_DE, 0},
34 {Z80_LD, Z80_A, Z80_REG_INDIRECT, Z80_DE, 0},
35 {Z80_DEC, Z80_DE, Z80_UNUSED, Z80_UNUSED, 0},
36 {Z80_INC, Z80_E, Z80_UNUSED, Z80_UNUSED, 0},
37 {Z80_DEC, Z80_E, Z80_UNUSED, Z80_UNUSED, 0},
38 {Z80_LD, Z80_E, Z80_IMMED, Z80_UNUSED, 0},
39 {Z80_RR, Z80_A, Z80_UNUSED, Z80_UNUSED, 0},
40 //2
41 {Z80_JRCC, Z80_CC_NZ, Z80_IMMED, Z80_UNUSED, 0},
42 {Z80_LD, Z80_HL, Z80_IMMED, Z80_UNUSED, 0},
43 {Z80_LD, Z80_HL, Z80_IMMED_INDIRECT | Z80_DIR, Z80_UNUSED, 0},
44 {Z80_INC, Z80_HL, Z80_UNUSED, Z80_UNUSED, 0},
45 {Z80_INC, Z80_H, Z80_UNUSED, Z80_UNUSED, 0},
46 {Z80_DEC, Z80_H, Z80_UNUSED, Z80_UNUSED, 0},
47 {Z80_LD, Z80_H, Z80_IMMED, Z80_UNUSED, 0},
48 {Z80_DAA, Z80_UNUSED, Z80_UNUSED, Z80_UNUSED, 0},
49 {Z80_JRCC, Z80_CC_Z, Z80_IMMED, Z80_UNUSED, 0},
50 {Z80_ADD, Z80_HL, Z80_REG, Z80_HL, 0},
51 {Z80_LD, Z80_HL, Z80_IMMED_INDIRECT, Z80_IMMED, 0},
52 {Z80_DEC, Z80_HL, Z80_UNUSED, Z80_UNUSED, 0},
53 {Z80_INC, Z80_L, Z80_UNUSED, Z80_UNUSED, 0},
54 {Z80_DEC, Z80_L, Z80_UNUSED, Z80_UNUSED, 0},
55 {Z80_LD, Z80_L, Z80_IMMED, Z80_UNUSED, 0},
56 {Z80_CPL, Z80_UNUSED, Z80_UNUSED, Z80_UNUSED, 0},
57 //3
58 {Z80_JRCC, Z80_CC_NC, Z80_IMMED, Z80_UNUSED, 0},
59 {Z80_LD, Z80_SP, Z80_IMMED, Z80_UNUSED, 0},
60 {Z80_LD, Z80_A, Z80_IMMED_INDIRECT | Z80_DIR, Z80_UNUSED, 0},
61 {Z80_INC, Z80_SP, Z80_UNUSED, Z80_UNUSED, 0},
62 {Z80_INC, Z80_UNUSED, Z80_REG_INDIRECT, Z80_HL, 0},
63 {Z80_DEC, Z80_UNUSED, Z80_REG_INDIRECT, Z80_HL, 0},
64 {Z80_LD, Z80_USE_IMMED, Z80_REG_INDIRECT | Z80_DIR, Z80_HL, 0},
65 {Z80_SCF, Z80_UNUSED, Z80_UNUSED, Z80_UNUSED, 0},
66 {Z80_JRCC, Z80_CC_C, Z80_IMMED, Z80_UNUSED, 0},
67 {Z80_ADD, Z80_HL, Z80_REG, Z80_SP, 0},
68 {Z80_LD, Z80_A, Z80_IMMED_INDIRECT, Z80_IMMED, 0},
69 {Z80_DEC, Z80_SP, Z80_UNUSED, Z80_UNUSED, 0},
70 {Z80_INC, Z80_A, Z80_UNUSED, Z80_UNUSED, 0},
71 {Z80_DEC, Z80_A, Z80_UNUSED, Z80_UNUSED, 0},
72 {Z80_LD, Z80_A, Z80_IMMED, Z80_UNUSED, 0},
73 {Z80_CCF, Z80_UNUSED, Z80_UNUSED, Z80_UNUSED, 0},
74 //4
75 {Z80_LD, Z80_B, Z80_REG, Z80_B, 0},
76 {Z80_LD, Z80_B, Z80_REG, Z80_C, 0},
77 {Z80_LD, Z80_B, Z80_REG, Z80_D, 0},
78 {Z80_LD, Z80_B, Z80_REG, Z80_E, 0},
79 {Z80_LD, Z80_B, Z80_REG, Z80_H, 0},
80 {Z80_LD, Z80_B, Z80_REG, Z80_L, 0},
81 {Z80_LD, Z80_B, Z80_REG_INDIRECT, Z80_HL, 0},
82 {Z80_LD, Z80_B, Z80_REG, Z80_A, 0},
83 {Z80_LD, Z80_C, Z80_REG, Z80_B, 0},
84 {Z80_LD, Z80_C, Z80_REG, Z80_C, 0},
85 {Z80_LD, Z80_C, Z80_REG, Z80_D, 0},
86 {Z80_LD, Z80_C, Z80_REG, Z80_E, 0},
87 {Z80_LD, Z80_C, Z80_REG, Z80_H, 0},
88 {Z80_LD, Z80_C, Z80_REG, Z80_L, 0},
89 {Z80_LD, Z80_C, Z80_REG_INDIRECT, Z80_HL, 0},
90 {Z80_LD, Z80_C, Z80_REG, Z80_A, 0},
91 //5
92 {Z80_LD, Z80_D, Z80_REG, Z80_B, 0},
93 {Z80_LD, Z80_D, Z80_REG, Z80_C, 0},
94 {Z80_LD, Z80_D, Z80_REG, Z80_D, 0},
95 {Z80_LD, Z80_D, Z80_REG, Z80_E, 0},
96 {Z80_LD, Z80_D, Z80_REG, Z80_H, 0},
97 {Z80_LD, Z80_D, Z80_REG, Z80_L, 0},
98 {Z80_LD, Z80_D, Z80_REG_INDIRECT, Z80_HL, 0},
99 {Z80_LD, Z80_D, Z80_REG, Z80_A, 0},
100 {Z80_LD, Z80_E, Z80_REG, Z80_B, 0},
101 {Z80_LD, Z80_E, Z80_REG, Z80_C, 0},
102 {Z80_LD, Z80_E, Z80_REG, Z80_D, 0},
103 {Z80_LD, Z80_E, Z80_REG, Z80_E, 0},
104 {Z80_LD, Z80_E, Z80_REG, Z80_H, 0},
105 {Z80_LD, Z80_E, Z80_REG, Z80_L, 0},
106 {Z80_LD, Z80_E, Z80_REG_INDIRECT, Z80_HL, 0},
107 {Z80_LD, Z80_E, Z80_REG, Z80_A, 0},
108 //6
109 {Z80_LD, Z80_H, Z80_REG, Z80_B, 0},
110 {Z80_LD, Z80_H, Z80_REG, Z80_C, 0},
111 {Z80_LD, Z80_H, Z80_REG, Z80_D, 0},
112 {Z80_LD, Z80_H, Z80_REG, Z80_E, 0},
113 {Z80_LD, Z80_H, Z80_REG, Z80_H, 0},
114 {Z80_LD, Z80_H, Z80_REG, Z80_L, 0},
115 {Z80_LD, Z80_H, Z80_REG_INDIRECT, Z80_HL, 0},
116 {Z80_LD, Z80_H, Z80_REG, Z80_A, 0},
117 {Z80_LD, Z80_L, Z80_REG, Z80_B, 0},
118 {Z80_LD, Z80_L, Z80_REG, Z80_C, 0},
119 {Z80_LD, Z80_L, Z80_REG, Z80_D, 0},
120 {Z80_LD, Z80_L, Z80_REG, Z80_E, 0},
121 {Z80_LD, Z80_L, Z80_REG, Z80_H, 0},
122 {Z80_LD, Z80_L, Z80_REG, Z80_L, 0},
123 {Z80_LD, Z80_L, Z80_REG_INDIRECT, Z80_HL, 0},
124 {Z80_LD, Z80_L, Z80_REG, Z80_A, 0},
125 //7
126 {Z80_LD, Z80_B, Z80_REG_INDIRECT | Z80_DIR, Z80_HL, 0},
127 {Z80_LD, Z80_C, Z80_REG_INDIRECT | Z80_DIR, Z80_HL, 0},
128 {Z80_LD, Z80_D, Z80_REG_INDIRECT | Z80_DIR, Z80_HL, 0},
129 {Z80_LD, Z80_E, Z80_REG_INDIRECT | Z80_DIR, Z80_HL, 0},
130 {Z80_LD, Z80_H, Z80_REG_INDIRECT | Z80_DIR, Z80_HL, 0},
131 {Z80_LD, Z80_L, Z80_REG_INDIRECT | Z80_DIR, Z80_HL, 0},
132 {Z80_HALT, Z80_UNUSED, Z80_UNUSED, Z80_UNUSED, 0},
133 {Z80_LD, Z80_A, Z80_REG_INDIRECT | Z80_DIR, Z80_HL, 0},
134 {Z80_LD, Z80_A, Z80_REG, Z80_B, 0},
135 {Z80_LD, Z80_A, Z80_REG, Z80_C, 0},
136 {Z80_LD, Z80_A, Z80_REG, Z80_D, 0},
137 {Z80_LD, Z80_A, Z80_REG, Z80_E, 0},
138 {Z80_LD, Z80_A, Z80_REG, Z80_H, 0},
139 {Z80_LD, Z80_A, Z80_REG, Z80_L, 0},
140 {Z80_LD, Z80_A, Z80_REG_INDIRECT, Z80_HL, 0},
141 {Z80_LD, Z80_A, Z80_REG, Z80_A, 0},
142 //8
143 {Z80_ADD, Z80_A, Z80_REG, Z80_B, 0},
144 {Z80_ADD, Z80_A, Z80_REG, Z80_C, 0},
145 {Z80_ADD, Z80_A, Z80_REG, Z80_D, 0},
146 {Z80_ADD, Z80_A, Z80_REG, Z80_E, 0},
147 {Z80_ADD, Z80_A, Z80_REG, Z80_H, 0},
148 {Z80_ADD, Z80_A, Z80_REG, Z80_L, 0},
149 {Z80_ADD, Z80_A, Z80_REG_INDIRECT, Z80_HL, 0},
150 {Z80_ADD, Z80_A, Z80_REG, Z80_A, 0},
151 {Z80_ADC, Z80_A, Z80_REG, Z80_B, 0},
152 {Z80_ADC, Z80_A, Z80_REG, Z80_C, 0},
153 {Z80_ADC, Z80_A, Z80_REG, Z80_D, 0},
154 {Z80_ADC, Z80_A, Z80_REG, Z80_E, 0},
155 {Z80_ADC, Z80_A, Z80_REG, Z80_H, 0},
156 {Z80_ADC, Z80_A, Z80_REG, Z80_L, 0},
157 {Z80_ADC, Z80_A, Z80_REG_INDIRECT, Z80_HL, 0},
158 {Z80_ADC, Z80_A, Z80_REG, Z80_A, 0},
159 //9
160 {Z80_SUB, Z80_A, Z80_REG, Z80_B, 0},
161 {Z80_SUB, Z80_A, Z80_REG, Z80_C, 0},
162 {Z80_SUB, Z80_A, Z80_REG, Z80_D, 0},
163 {Z80_SUB, Z80_A, Z80_REG, Z80_E, 0},
164 {Z80_SUB, Z80_A, Z80_REG, Z80_H, 0},
165 {Z80_SUB, Z80_A, Z80_REG, Z80_L, 0},
166 {Z80_SUB, Z80_A, Z80_REG_INDIRECT, Z80_HL, 0},
167 {Z80_SUB, Z80_A, Z80_REG, Z80_A, 0},
168 {Z80_SBC, Z80_A, Z80_REG, Z80_B, 0},
169 {Z80_SBC, Z80_A, Z80_REG, Z80_C, 0},
170 {Z80_SBC, Z80_A, Z80_REG, Z80_D, 0},
171 {Z80_SBC, Z80_A, Z80_REG, Z80_E, 0},
172 {Z80_SBC, Z80_A, Z80_REG, Z80_H, 0},
173 {Z80_SBC, Z80_A, Z80_REG, Z80_L, 0},
174 {Z80_SBC, Z80_A, Z80_REG_INDIRECT, Z80_HL, 0},
175 {Z80_SBC, Z80_A, Z80_REG, Z80_A, 0},
176 //A
177 {Z80_AND, Z80_A, Z80_REG, Z80_B, 0},
178 {Z80_AND, Z80_A, Z80_REG, Z80_C, 0},
179 {Z80_AND, Z80_A, Z80_REG, Z80_D, 0},
180 {Z80_AND, Z80_A, Z80_REG, Z80_E, 0},
181 {Z80_AND, Z80_A, Z80_REG, Z80_H, 0},
182 {Z80_AND, Z80_A, Z80_REG, Z80_L, 0},
183 {Z80_AND, Z80_A, Z80_REG_INDIRECT, Z80_HL, 0},
184 {Z80_AND, Z80_A, Z80_REG, Z80_A, 0},
185 {Z80_XOR, Z80_A, Z80_REG, Z80_B, 0},
186 {Z80_XOR, Z80_A, Z80_REG, Z80_C, 0},
187 {Z80_XOR, Z80_A, Z80_REG, Z80_D, 0},
188 {Z80_XOR, Z80_A, Z80_REG, Z80_E, 0},
189 {Z80_XOR, Z80_A, Z80_REG, Z80_H, 0},
190 {Z80_XOR, Z80_A, Z80_REG, Z80_L, 0},
191 {Z80_XOR, Z80_A, Z80_REG_INDIRECT, Z80_HL, 0},
192 {Z80_XOR, Z80_A, Z80_REG, Z80_A, 0},
193 //B
194 {Z80_OR, Z80_A, Z80_REG, Z80_B, 0},
195 {Z80_OR, Z80_A, Z80_REG, Z80_C, 0},
196 {Z80_OR, Z80_A, Z80_REG, Z80_D, 0},
197 {Z80_OR, Z80_A, Z80_REG, Z80_E, 0},
198 {Z80_OR, Z80_A, Z80_REG, Z80_H, 0},
199 {Z80_OR, Z80_A, Z80_REG, Z80_L, 0},
200 {Z80_OR, Z80_A, Z80_REG_INDIRECT, Z80_HL, 0},
201 {Z80_OR, Z80_A, Z80_REG, Z80_A, 0},
202 {Z80_OR, Z80_CP, Z80_REG, Z80_B, 0},
203 {Z80_OR, Z80_CP, Z80_REG, Z80_C, 0},
204 {Z80_OR, Z80_CP, Z80_REG, Z80_D, 0},
205 {Z80_OR, Z80_CP, Z80_REG, Z80_E, 0},
206 {Z80_OR, Z80_CP, Z80_REG, Z80_H, 0},
207 {Z80_OR, Z80_CP, Z80_REG, Z80_L, 0},
208 {Z80_OR, Z80_CP, Z80_REG_INDIRECT, Z80_HL, 0},
209 {Z80_OR, Z80_CP, Z80_REG, Z80_A, 0},
210 //C
211 {Z80_RETCC, Z80_CC_NZ, Z80_UNUSED, Z80_UNUSED, 0},
212 {Z80_POP, Z80_BC, Z80_UNUSED, Z80_UNUSED, 0},
213 {Z80_JPCC, Z80_CC_NZ, Z80_IMMED, Z80_UNUSED, 0},
214 {Z80_JP, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0},
215 {Z80_CALLCC, Z80_CC_NZ, Z80_IMMED, Z80_UNUSED, 0},
216 {Z80_PUSH, Z80_BC, Z80_UNUSED, Z80_UNUSED, 0},
217 {Z80_ADD, Z80_A, Z80_IMMED, Z80_UNUSED, 0},
218 {Z80_RST, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0x0},
219 {Z80_RETCC, Z80_CC_Z, Z80_UNUSED, Z80_UNUSED, 0},
220 {Z80_RET, Z80_UNUSED, Z80_UNUSED, Z80_UNUSED, 0},
221 {Z80_JPCC, Z80_CC_Z, Z80_IMMED, Z80_UNUSED, 0},
222 {0, 0, 0, 0, 0},//BITS Prefix
223 {Z80_CALLCC, Z80_CC_Z, Z80_IMMED, Z80_UNUSED, 0},
224 {Z80_CALL, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0},
225 {Z80_ADC, Z80_A, Z80_IMMED, Z80_UNUSED, 0},
226 {Z80_RST, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0x8},
227 //D
228 {Z80_RETCC, Z80_CC_NC, Z80_UNUSED, Z80_UNUSED, 0},
229 {Z80_POP, Z80_DE, Z80_UNUSED, Z80_UNUSED, 0},
230 {Z80_JPCC, Z80_CC_NC, Z80_IMMED, Z80_UNUSED, 0},
231 {Z80_OUT, Z80_A, Z80_IMMED_INDIRECT, Z80_UNUSED, 0},
232 {Z80_CALLCC, Z80_CC_NC, Z80_IMMED, Z80_UNUSED, 0},
233 {Z80_PUSH, Z80_DE, Z80_UNUSED, Z80_UNUSED, 0},
234 {Z80_SUB, Z80_A, Z80_IMMED, Z80_UNUSED, 0},
235 {Z80_RST, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0x10},
236 {Z80_RETCC, Z80_CC_C, Z80_UNUSED, Z80_UNUSED, 0},
237 {Z80_EXX, Z80_UNUSED, Z80_UNUSED, Z80_UNUSED, 0},
238 {Z80_JPCC, Z80_CC_C, Z80_IMMED, Z80_UNUSED, 0},
239 {Z80_IN, Z80_A, Z80_IMMED_INDIRECT, Z80_UNUSED, 0},
240 {Z80_CALLCC, Z80_CC_C, Z80_IMMED, Z80_UNUSED, 0},
241 {0, 0, 0, 0, 0},//IX Prefix
242 {Z80_SBC, Z80_A, Z80_IMMED, Z80_UNUSED, 0},
243 {Z80_RST, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0x18},
244 //E
245 {Z80_RETCC, Z80_CC_PO, Z80_UNUSED, Z80_UNUSED, 0},
246 {Z80_POP, Z80_HL, Z80_UNUSED, Z80_UNUSED, 0},
247 {Z80_JPCC, Z80_CC_PO, Z80_IMMED, Z80_UNUSED, 0},
248 {Z80_EX, Z80_HL, Z80_REG_INDIRECT | Z80_DIR, Z80_SP, 0},
249 {Z80_CALLCC, Z80_CC_PO, Z80_IMMED, Z80_UNUSED, 0},
250 {Z80_PUSH, Z80_HL, Z80_UNUSED, Z80_UNUSED, 0},
251 {Z80_AND, Z80_A, Z80_IMMED, Z80_UNUSED, 0},
252 {Z80_RST, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0x20},
253 {Z80_RETCC, Z80_CC_PE, Z80_UNUSED, Z80_UNUSED, 0},
254 {Z80_JP, Z80_UNUSED, Z80_REG_INDIRECT, Z80_HL, 0},
255 {Z80_JPCC, Z80_CC_PE, Z80_IMMED, Z80_UNUSED, 0},
256 {Z80_EX, Z80_DE, Z80_REG, Z80_HL, 0},
257 {Z80_CALLCC, Z80_CC_PE, Z80_IMMED, Z80_UNUSED, 0},
258 {0, 0, 0, 0, 0},//EXTD Prefix
259 {Z80_XOR, Z80_A, Z80_IMMED, Z80_UNUSED, 0},
260 {Z80_RST, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0x28},
261 //F
262 {Z80_RETCC, Z80_CC_P, Z80_UNUSED, Z80_UNUSED, 0},
263 {Z80_POP, Z80_AF, Z80_UNUSED, Z80_UNUSED, 0},
264 {Z80_JPCC, Z80_CC_P, Z80_IMMED, Z80_UNUSED, 0},
265 {Z80_DI, Z80_UNUSED, Z80_UNUSED, Z80_UNUSED, 0},
266 {Z80_CALLCC, Z80_CC_P, Z80_IMMED, Z80_UNUSED, 0},
267 {Z80_PUSH, Z80_AF, Z80_UNUSED, Z80_UNUSED, 0},
268 {Z80_OR, Z80_A, Z80_IMMED, Z80_UNUSED, 0},
269 {Z80_RST, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0x30},
270 {Z80_RETCC, Z80_CC_M, Z80_UNUSED, Z80_UNUSED, 0},
271 {Z80_LD, Z80_SP, Z80_REG, Z80_HL, 0},
272 {Z80_JPCC, Z80_CC_M, Z80_IMMED, Z80_UNUSED, 0},
273 {Z80_EI, Z80_UNUSED, Z80_UNUSED, Z80_UNUSED, 0},
274 {Z80_CALLCC, Z80_CC_M, Z80_IMMED, Z80_UNUSED, 0},
275 {0, 0, 0, 0, 0},//IY Prefix
276 {Z80_CP, Z80_A, Z80_IMMED, Z80_UNUSED, 0},
277 {Z80_RST, Z80_UNUSED, Z80_IMMED, Z80_UNUSED, 0x38}
278 };
279
280 uint8_t * z80_decode(uint8_t * istream, z80inst * decoded)
281 {
282 if (*istream == 0xCB) {
283 } else if (*istream == 0xDD) {
284 } else if (*istream == 0xED) {
285 } else if (*istream == 0xFD) {
286 } else {
287 memcpy(decoded, z80_tbl_a + *istream, sizeof(z80inst));
288 if (decoded->addr_mode == Z80_IMMED && decoded->op != Z80_RST) {
289 decoded->immed = *(++istream);
290 if (decoded->reg >= Z80_BC) {
291 decoded->immed |= *(++istream) << 8;
292 } else if (decoded->immed & 0x80) {
293 decoded->immed |= 0xFF00;
294 }
295 } else if (decoded->addr_mode == Z80_IMMED_INDIRECT) {
296 decoded->immed = *(++istream);
297 if (decoded->op != Z80_OUT && decoded->op != Z80_IN) {
298 decoded->immed |= *(++istream) << 8;
299 }
300 } else if (decoded->reg == Z80_USE_IMMED) {
301 decoded->immed = *(++istream);
302 }
303 }
304 return istream+1;
305 }
306
307 char *z80_mnemonics[Z80_OTDR+1] = {
308 "ld",
309 "push",
310 "pop",
311 "ex",
312 "exx",
313 "ldi",
314 "ldir",
315 "ldd",
316 "lddr",
317 "cpi",
318 "cpir",
319 "cpd",
320 "cpdr",
321 "add",
322 "adc",
323 "sub",
324 "sbc",
325 "and",
326 "or",
327 "xor",
328 "cp",
329 "inc",
330 "dec",
331 "daa",
332 "cpl",
333 "neg",
334 "ccf",
335 "scf",
336 "nop",
337 "halt",
338 "di",
339 "ei",
340 "im",
341 "rlc",
342 "rl",
343 "rrc",
344 "rr",
345 "sl",
346 "rld",
347 "rrd",
348 "bit",
349 "set",
350 "res",
351 "jp",
352 "jp",
353 "jr",
354 "jr",
355 "djnz",
356 "call",
357 "call",
358 "ret",
359 "ret",
360 "reti",
361 "retn",
362 "rst",
363 "in",
364 "ini",
365 "inir",
366 "indr",
367 "out",
368 "outi",
369 "otir",
370 "outd",
371 "otdr"
372 };
373
374 char * z80_regs[Z80_USE_IMMED] = {
375 "b",
376 "c",
377 "d",
378 "e",
379 "h",
380 "l",
381 "",
382 "a",
383 "bc",
384 "de",
385 "hl",
386 "sp",
387 "af",
388 };
389
390 char * z80_conditions[Z80_CC_M+1] = {
391 "nz",
392 "z",
393 "nc",
394 "c",
395 "po",
396 "pe",
397 "p",
398 "m"
399 };
400
401 int z80_disasm(z80inst * decoded, char * dst)
402 {
403 int len = sprintf(dst, "%s", z80_mnemonics[decoded->op]);
404 if (decoded->addr_mode & Z80_DIR) {
405 switch (decoded->addr_mode)
406 {
407 case Z80_REG:
408 len += sprintf(dst+len, " %s", z80_regs[decoded->ea_reg]);
409 break;
410 case Z80_REG_INDIRECT:
411 len += sprintf(dst+len, " (%s)", z80_regs[decoded->ea_reg]);
412 break;
413 case Z80_IMMED:
414 len += sprintf(dst+len, " %d", decoded->immed);
415 break;
416 case Z80_IMMED_INDIRECT:
417 len += sprintf(dst+len, " (%d)", decoded->immed);
418 break;
419 }
420 if (decoded->reg != Z80_UNUSED) {
421 if (decoded->op == Z80_JRCC || decoded->op == Z80_JPCC || decoded->op == Z80_CALLCC || decoded->op == Z80_RETCC) {
422 len += sprintf(dst+len, "%s %s", decoded->reg == Z80_UNUSED ? "" : "," , z80_conditions[decoded->reg]);
423 } else {
424 len += sprintf(dst+len, "%s %s", decoded->reg == Z80_UNUSED ? "" : "," , z80_regs[decoded->reg]);
425 }
426 }
427 } else {
428 if (decoded->reg != Z80_UNUSED) {
429 if (decoded->op == Z80_JRCC || decoded->op == Z80_JPCC || decoded->op == Z80_CALLCC || decoded->op == Z80_RETCC) {
430 len += sprintf(dst+len, " %s", z80_conditions[decoded->reg]);
431 } else {
432 len += sprintf(dst+len, " %s", z80_regs[decoded->reg]);
433 }
434 }
435 switch (decoded->addr_mode)
436 {
437 case Z80_REG:
438 len += sprintf(dst+len, "%s %s", decoded->reg == Z80_UNUSED ? "" : "," , z80_regs[decoded->ea_reg]);
439 break;
440 case Z80_REG_INDIRECT:
441 len += sprintf(dst+len, "%s (%s)", decoded->reg == Z80_UNUSED ? "" : "," , z80_regs[decoded->ea_reg]);
442 break;
443 case Z80_IMMED:
444 len += sprintf(dst+len, "%s %d", decoded->reg == Z80_UNUSED ? "" : "," , decoded->immed);
445 break;
446 case Z80_IMMED_INDIRECT:
447 len += sprintf(dst+len, "%s (%d)", decoded->reg == Z80_UNUSED ? "" : "," , decoded->immed);
448 break;
449 }
450 }
451 return len;
452 }
453